./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 574ddb4e Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 13096ecc896a778cf08851ae14dc5c7b87ba00c42e74b90edd25cd2cb7c21f17 --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 13:34:01,922 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 13:34:01,923 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 13:34:01,940 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 13:34:01,940 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 13:34:01,941 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 13:34:01,943 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 13:34:01,946 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 13:34:01,947 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 13:34:01,948 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 13:34:01,949 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 13:34:01,950 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 13:34:01,951 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 13:34:01,953 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 13:34:01,953 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 13:34:01,955 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 13:34:01,956 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 13:34:01,959 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 13:34:01,961 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 13:34:01,962 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 13:34:01,964 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 13:34:01,965 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 13:34:01,966 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 13:34:01,967 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 13:34:01,969 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 13:34:01,971 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 13:34:01,971 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 13:34:01,972 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 13:34:01,973 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 13:34:01,973 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 13:34:01,974 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 13:34:01,975 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 13:34:01,975 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 13:34:01,976 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 13:34:01,977 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 13:34:01,978 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 13:34:01,978 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 13:34:01,979 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 13:34:01,979 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 13:34:01,979 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 13:34:01,980 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 13:34:01,981 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 13:34:02,011 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 13:34:02,011 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 13:34:02,012 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 13:34:02,012 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 13:34:02,013 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 13:34:02,013 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 13:34:02,013 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 13:34:02,013 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 13:34:02,013 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 13:34:02,014 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 13:34:02,014 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 13:34:02,014 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 13:34:02,014 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 13:34:02,015 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 13:34:02,015 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 13:34:02,015 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 13:34:02,015 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 13:34:02,015 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 13:34:02,015 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 13:34:02,015 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 13:34:02,016 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 13:34:02,016 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 13:34:02,016 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 13:34:02,016 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 13:34:02,016 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 13:34:02,016 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 13:34:02,016 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 13:34:02,017 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 13:34:02,017 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 13:34:02,017 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 13:34:02,017 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 13:34:02,017 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 13:34:02,017 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 13:34:02,017 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 13:34:02,018 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 13:34:02,018 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13096ecc896a778cf08851ae14dc5c7b87ba00c42e74b90edd25cd2cb7c21f17 [2023-02-18 13:34:02,211 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 13:34:02,264 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 13:34:02,266 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 13:34:02,267 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 13:34:02,268 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 13:34:02,268 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c [2023-02-18 13:34:03,204 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 13:34:03,616 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 13:34:03,619 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c [2023-02-18 13:34:03,654 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ce08edde/7bdde9280d714089b6e9d74cb1e03e19/FLAG10c04df2f [2023-02-18 13:34:03,667 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ce08edde/7bdde9280d714089b6e9d74cb1e03e19 [2023-02-18 13:34:03,668 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 13:34:03,670 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 13:34:03,672 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 13:34:03,672 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 13:34:03,674 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 13:34:03,675 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 01:34:03" (1/1) ... [2023-02-18 13:34:03,675 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68fdaf56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:34:03, skipping insertion in model container [2023-02-18 13:34:03,676 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 01:34:03" (1/1) ... [2023-02-18 13:34:03,680 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 13:34:03,763 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 13:34:04,213 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c[77246,77259] [2023-02-18 13:34:04,236 WARN L623 FunctionHandler]: Unknown extern function swprintf [2023-02-18 13:34:04,243 WARN L623 FunctionHandler]: Unknown extern function sprintf [2023-02-18 13:34:04,542 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 13:34:04,563 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 13:34:04,589 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c[77246,77259] [2023-02-18 13:34:04,603 WARN L623 FunctionHandler]: Unknown extern function swprintf [2023-02-18 13:34:04,605 WARN L623 FunctionHandler]: Unknown extern function sprintf [2023-02-18 13:34:04,780 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 13:34:04,812 INFO L208 MainTranslator]: Completed translation [2023-02-18 13:34:04,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:34:04 WrapperNode [2023-02-18 13:34:04,813 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 13:34:04,814 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 13:34:04,814 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 13:34:04,814 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 13:34:04,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:34:04" (1/1) ... [2023-02-18 13:34:04,910 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:34:04" (1/1) ... [2023-02-18 13:34:04,993 INFO L138 Inliner]: procedures = 128, calls = 2895, calls flagged for inlining = 37, calls inlined = 26, statements flattened = 3094 [2023-02-18 13:34:04,993 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 13:34:04,994 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 13:34:04,994 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 13:34:04,995 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 13:34:05,001 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:34:04" (1/1) ... [2023-02-18 13:34:05,001 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:34:04" (1/1) ... [2023-02-18 13:34:05,034 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:34:04" (1/1) ... [2023-02-18 13:34:05,035 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:34:04" (1/1) ... [2023-02-18 13:34:05,106 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:34:04" (1/1) ... [2023-02-18 13:34:05,113 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:34:04" (1/1) ... [2023-02-18 13:34:05,134 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:34:04" (1/1) ... [2023-02-18 13:34:05,142 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:34:04" (1/1) ... [2023-02-18 13:34:05,160 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 13:34:05,162 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 13:34:05,162 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 13:34:05,162 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 13:34:05,162 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:34:04" (1/1) ... [2023-02-18 13:34:05,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 13:34:05,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 13:34:05,213 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) [2023-02-18 13:34:05,219 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 [2023-02-18 13:34:05,239 INFO L130 BoogieDeclarations]: Found specification of procedure IoGetConfigurationInformation [2023-02-18 13:34:05,240 INFO L138 BoogieDeclarations]: Found implementation of procedure IoGetConfigurationInformation [2023-02-18 13:34:05,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-02-18 13:34:05,240 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-02-18 13:34:05,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-02-18 13:34:05,240 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-18 13:34:05,240 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2023-02-18 13:34:05,240 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2023-02-18 13:34:05,240 INFO L130 BoogieDeclarations]: Found specification of procedure IoSetDeviceInterfaceState [2023-02-18 13:34:05,240 INFO L138 BoogieDeclarations]: Found implementation of procedure IoSetDeviceInterfaceState [2023-02-18 13:34:05,241 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyCreateClose [2023-02-18 13:34:05,241 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyCreateClose [2023-02-18 13:34:05,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-18 13:34:05,241 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnpComplete [2023-02-18 13:34:05,241 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnpComplete [2023-02-18 13:34:05,241 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2023-02-18 13:34:05,241 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2023-02-18 13:34:05,241 INFO L130 BoogieDeclarations]: Found specification of procedure InterlockedExchange [2023-02-18 13:34:05,241 INFO L138 BoogieDeclarations]: Found implementation of procedure InterlockedExchange [2023-02-18 13:34:05,241 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-02-18 13:34:05,242 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-02-18 13:34:05,242 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2023-02-18 13:34:05,242 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2023-02-18 13:34:05,242 INFO L130 BoogieDeclarations]: Found specification of procedure FlQueueIrpToThread [2023-02-18 13:34:05,242 INFO L138 BoogieDeclarations]: Found implementation of procedure FlQueueIrpToThread [2023-02-18 13:34:05,242 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyDeviceControl [2023-02-18 13:34:05,243 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyDeviceControl [2023-02-18 13:34:05,243 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-18 13:34:05,243 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 13:34:05,243 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyProcessQueuedRequests [2023-02-18 13:34:05,243 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyProcessQueuedRequests [2023-02-18 13:34:05,243 INFO L130 BoogieDeclarations]: Found specification of procedure ExfInterlockedInsertTailList [2023-02-18 13:34:05,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ExfInterlockedInsertTailList [2023-02-18 13:34:05,244 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-18 13:34:05,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-18 13:34:05,244 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2023-02-18 13:34:05,244 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2023-02-18 13:34:05,244 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-18 13:34:05,244 INFO L130 BoogieDeclarations]: Found specification of procedure FlFdcDeviceIo [2023-02-18 13:34:05,244 INFO L138 BoogieDeclarations]: Found implementation of procedure FlFdcDeviceIo [2023-02-18 13:34:05,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-18 13:34:05,245 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2023-02-18 13:34:05,245 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2023-02-18 13:34:05,245 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memmove [2023-02-18 13:34:05,245 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memmove [2023-02-18 13:34:05,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 13:34:05,246 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_guard [2023-02-18 13:34:05,246 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_guard [2023-02-18 13:34:05,246 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyQueueRequest [2023-02-18 13:34:05,246 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyQueueRequest [2023-02-18 13:34:05,246 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-02-18 13:34:05,247 INFO L130 BoogieDeclarations]: Found specification of procedure ExAllocatePoolWithTag [2023-02-18 13:34:05,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ExAllocatePoolWithTag [2023-02-18 13:34:05,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 13:34:05,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 13:34:05,658 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 13:34:05,660 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 13:34:05,699 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-18 13:34:05,706 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2023-02-18 13:34:05,707 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2023-02-18 13:34:05,708 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-18 13:34:05,790 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##24: assume !false; [2023-02-18 13:34:05,790 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##23: assume false; [2023-02-18 13:34:05,804 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-18 13:34:05,814 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2023-02-18 13:34:05,814 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2023-02-18 13:34:05,883 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-18 13:34:05,900 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2023-02-18 13:34:05,900 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2023-02-18 13:34:05,901 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-18 13:34:05,901 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-18 13:34:05,901 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-18 13:34:05,976 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume !false; [2023-02-18 13:34:05,977 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##24: assume !false; [2023-02-18 13:34:05,977 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##23: assume false; [2023-02-18 13:34:05,977 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##19: assume false; [2023-02-18 13:34:05,977 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume false; [2023-02-18 13:34:05,977 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume !false; [2023-02-18 13:34:05,979 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-18 13:34:05,983 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-18 13:34:05,984 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-18 13:34:06,338 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##38: assume !false; [2023-02-18 13:34:06,338 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##37: assume false; [2023-02-18 13:34:06,338 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##139: assume false; [2023-02-18 13:34:06,339 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##140: assume !false; [2023-02-18 13:34:06,339 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##124: assume !false; [2023-02-18 13:34:06,339 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##123: assume false; [2023-02-18 13:34:06,362 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-18 13:34:06,385 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2023-02-18 13:34:06,385 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2023-02-18 13:34:06,392 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-18 13:34:06,393 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-18 13:34:06,394 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-18 13:34:06,395 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-18 13:34:06,396 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-18 13:34:06,397 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-18 13:34:06,398 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-18 13:34:06,399 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-18 13:34:09,441 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##97: assume !false; [2023-02-18 13:34:09,441 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##96: assume false; [2023-02-18 13:34:09,441 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##76: assume false; [2023-02-18 13:34:09,441 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##177: assume !false; [2023-02-18 13:34:09,441 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##176: assume false; [2023-02-18 13:34:09,441 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##77: assume !false; [2023-02-18 13:34:09,441 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##48: assume !false; [2023-02-18 13:34:09,441 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##47: assume false; [2023-02-18 13:34:09,441 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##27: assume !false; [2023-02-18 13:34:09,441 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##26: assume false; [2023-02-18 13:34:09,442 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##162: assume false; [2023-02-18 13:34:09,442 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##163: assume !false; [2023-02-18 13:34:09,442 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##210: assume false; [2023-02-18 13:34:09,442 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##211: assume !false; [2023-02-18 13:34:09,442 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##108: assume !false; [2023-02-18 13:34:09,442 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##107: assume false; [2023-02-18 13:34:09,451 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 13:34:09,458 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 13:34:09,458 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2023-02-18 13:34:09,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 01:34:09 BoogieIcfgContainer [2023-02-18 13:34:09,460 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 13:34:09,461 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 13:34:09,461 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 13:34:09,463 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 13:34:09,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 01:34:03" (1/3) ... [2023-02-18 13:34:09,464 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3434f749 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 01:34:09, skipping insertion in model container [2023-02-18 13:34:09,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:34:04" (2/3) ... [2023-02-18 13:34:09,464 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3434f749 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 01:34:09, skipping insertion in model container [2023-02-18 13:34:09,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 01:34:09" (3/3) ... [2023-02-18 13:34:09,465 INFO L112 eAbstractionObserver]: Analyzing ICFG floppy.i.cil-3.c [2023-02-18 13:34:09,476 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 13:34:09,477 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 13:34:09,512 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 13:34:09,516 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;@4496794e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 13:34:09,516 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 13:34:09,521 INFO L276 IsEmpty]: Start isEmpty. Operand has 580 states, 463 states have (on average 1.4989200863930885) internal successors, (694), 496 states have internal predecessors, (694), 95 states have call successors, (95), 20 states have call predecessors, (95), 20 states have return successors, (95), 89 states have call predecessors, (95), 95 states have call successors, (95) [2023-02-18 13:34:09,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-18 13:34:09,526 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:34:09,527 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, 1] [2023-02-18 13:34:09,527 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:34:09,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:34:09,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1811520219, now seen corresponding path program 1 times [2023-02-18 13:34:09,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:34:09,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2313756] [2023-02-18 13:34:09,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:34:09,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:34:09,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:34:10,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:34:10,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:34:10,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:34:10,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:34:10,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:34:10,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:34:10,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2313756] [2023-02-18 13:34:10,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2313756] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:34:10,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:34:10,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 13:34:10,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99606129] [2023-02-18 13:34:10,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:34:10,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 13:34:10,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:34:10,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 13:34:10,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 13:34:10,086 INFO L87 Difference]: Start difference. First operand has 580 states, 463 states have (on average 1.4989200863930885) internal successors, (694), 496 states have internal predecessors, (694), 95 states have call successors, (95), 20 states have call predecessors, (95), 20 states have return successors, (95), 89 states have call predecessors, (95), 95 states have call successors, (95) Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 13:34:13,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:34:13,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:34:13,936 INFO L93 Difference]: Finished difference Result 1174 states and 1848 transitions. [2023-02-18 13:34:13,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 13:34:13,939 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2023-02-18 13:34:13,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:34:13,948 INFO L225 Difference]: With dead ends: 1174 [2023-02-18 13:34:13,949 INFO L226 Difference]: Without dead ends: 657 [2023-02-18 13:34:13,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-18 13:34:13,955 INFO L413 NwaCegarLoop]: 669 mSDtfsCounter, 419 mSDsluCounter, 1385 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 219 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 2054 SdHoareTripleChecker+Invalid, 1107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-02-18 13:34:13,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 2054 Invalid, 1107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 887 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2023-02-18 13:34:13,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2023-02-18 13:34:14,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 579. [2023-02-18 13:34:14,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 462 states have (on average 1.4567099567099566) internal successors, (673), 493 states have internal predecessors, (673), 95 states have call successors, (95), 22 states have call predecessors, (95), 21 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2023-02-18 13:34:14,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 840 transitions. [2023-02-18 13:34:14,009 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 840 transitions. Word has length 26 [2023-02-18 13:34:14,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:34:14,010 INFO L495 AbstractCegarLoop]: Abstraction has 579 states and 840 transitions. [2023-02-18 13:34:14,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 13:34:14,010 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 840 transitions. [2023-02-18 13:34:14,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-18 13:34:14,011 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:34:14,011 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, 1, 1, 1, 1] [2023-02-18 13:34:14,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 13:34:14,012 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:34:14,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:34:14,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1723209200, now seen corresponding path program 1 times [2023-02-18 13:34:14,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:34:14,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053576301] [2023-02-18 13:34:14,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:34:14,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:34:14,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:34:14,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:34:14,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:34:14,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:34:14,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:34:14,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:34:14,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:34:14,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053576301] [2023-02-18 13:34:14,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053576301] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:34:14,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:34:14,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-18 13:34:14,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514953614] [2023-02-18 13:34:14,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:34:14,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 13:34:14,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:34:14,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 13:34:14,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-18 13:34:14,374 INFO L87 Difference]: Start difference. First operand 579 states and 840 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 13:34:18,017 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 [] [2023-02-18 13:34:18,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:34:18,222 INFO L93 Difference]: Finished difference Result 1217 states and 1784 transitions. [2023-02-18 13:34:18,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 13:34:18,223 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2023-02-18 13:34:18,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:34:18,227 INFO L225 Difference]: With dead ends: 1217 [2023-02-18 13:34:18,228 INFO L226 Difference]: Without dead ends: 657 [2023-02-18 13:34:18,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-18 13:34:18,231 INFO L413 NwaCegarLoop]: 659 mSDtfsCounter, 381 mSDsluCounter, 2004 mSDsCounter, 0 mSdLazyCounter, 1088 mSolverCounterSat, 213 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 2663 SdHoareTripleChecker+Invalid, 1302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 1088 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-02-18 13:34:18,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [394 Valid, 2663 Invalid, 1302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 1088 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2023-02-18 13:34:18,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2023-02-18 13:34:18,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 579. [2023-02-18 13:34:18,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 462 states have (on average 1.4545454545454546) internal successors, (672), 493 states have internal predecessors, (672), 95 states have call successors, (95), 22 states have call predecessors, (95), 21 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2023-02-18 13:34:18,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 839 transitions. [2023-02-18 13:34:18,257 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 839 transitions. Word has length 29 [2023-02-18 13:34:18,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:34:18,257 INFO L495 AbstractCegarLoop]: Abstraction has 579 states and 839 transitions. [2023-02-18 13:34:18,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 13:34:18,257 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 839 transitions. [2023-02-18 13:34:18,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-18 13:34:18,258 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:34:18,258 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:34:18,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-18 13:34:18,259 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:34:18,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:34:18,259 INFO L85 PathProgramCache]: Analyzing trace with hash 51194362, now seen corresponding path program 1 times [2023-02-18 13:34:18,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:34:18,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108277340] [2023-02-18 13:34:18,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:34:18,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:34:18,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:34:18,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:34:18,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:34:18,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:34:18,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:34:18,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:34:18,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:34:18,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108277340] [2023-02-18 13:34:18,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108277340] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:34:18,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:34:18,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 13:34:18,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754405335] [2023-02-18 13:34:18,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:34:18,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 13:34:18,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:34:18,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 13:34:18,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 13:34:18,642 INFO L87 Difference]: Start difference. First operand 579 states and 839 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 13:34:21,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:34:22,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:34:22,816 INFO L93 Difference]: Finished difference Result 1542 states and 2294 transitions. [2023-02-18 13:34:22,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 13:34:22,817 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 33 [2023-02-18 13:34:22,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:34:22,821 INFO L225 Difference]: With dead ends: 1542 [2023-02-18 13:34:22,821 INFO L226 Difference]: Without dead ends: 1127 [2023-02-18 13:34:22,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-18 13:34:22,823 INFO L413 NwaCegarLoop]: 821 mSDtfsCounter, 1376 mSDsluCounter, 1487 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 380 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1413 SdHoareTripleChecker+Valid, 2308 SdHoareTripleChecker+Invalid, 1533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-02-18 13:34:22,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1413 Valid, 2308 Invalid, 1533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 1152 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2023-02-18 13:34:22,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2023-02-18 13:34:22,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 1008. [2023-02-18 13:34:22,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1008 states, 832 states have (on average 1.4399038461538463) internal successors, (1198), 859 states have internal predecessors, (1198), 132 states have call successors, (132), 40 states have call predecessors, (132), 43 states have return successors, (155), 116 states have call predecessors, (155), 117 states have call successors, (155) [2023-02-18 13:34:22,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1008 states to 1008 states and 1485 transitions. [2023-02-18 13:34:22,869 INFO L78 Accepts]: Start accepts. Automaton has 1008 states and 1485 transitions. Word has length 33 [2023-02-18 13:34:22,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:34:22,870 INFO L495 AbstractCegarLoop]: Abstraction has 1008 states and 1485 transitions. [2023-02-18 13:34:22,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 13:34:22,871 INFO L276 IsEmpty]: Start isEmpty. Operand 1008 states and 1485 transitions. [2023-02-18 13:34:22,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-18 13:34:22,886 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:34:22,886 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:34:22,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-18 13:34:22,891 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:34:22,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:34:22,891 INFO L85 PathProgramCache]: Analyzing trace with hash -778149095, now seen corresponding path program 1 times [2023-02-18 13:34:22,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:34:22,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208999674] [2023-02-18 13:34:22,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:34:22,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:34:22,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:34:23,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:34:23,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:34:23,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:34:23,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:34:23,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-18 13:34:23,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:34:23,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:34:23,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:34:23,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208999674] [2023-02-18 13:34:23,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208999674] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:34:23,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:34:23,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 13:34:23,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018552684] [2023-02-18 13:34:23,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:34:23,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 13:34:23,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:34:23,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 13:34:23,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 13:34:23,313 INFO L87 Difference]: Start difference. First operand 1008 states and 1485 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-18 13:34:26,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:34:27,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:34:27,319 INFO L93 Difference]: Finished difference Result 1879 states and 2849 transitions. [2023-02-18 13:34:27,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 13:34:27,320 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2023-02-18 13:34:27,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:34:27,327 INFO L225 Difference]: With dead ends: 1879 [2023-02-18 13:34:27,327 INFO L226 Difference]: Without dead ends: 1860 [2023-02-18 13:34:27,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-18 13:34:27,332 INFO L413 NwaCegarLoop]: 692 mSDtfsCounter, 1502 mSDsluCounter, 1255 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 364 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1572 SdHoareTripleChecker+Valid, 1947 SdHoareTripleChecker+Invalid, 1291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 364 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-02-18 13:34:27,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1572 Valid, 1947 Invalid, 1291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [364 Valid, 926 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2023-02-18 13:34:27,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2023-02-18 13:34:27,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1624. [2023-02-18 13:34:27,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1624 states, 1348 states have (on average 1.4614243323442135) internal successors, (1970), 1393 states have internal predecessors, (1970), 203 states have call successors, (203), 65 states have call predecessors, (203), 72 states have return successors, (264), 178 states have call predecessors, (264), 188 states have call successors, (264) [2023-02-18 13:34:27,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 2437 transitions. [2023-02-18 13:34:27,411 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 2437 transitions. Word has length 45 [2023-02-18 13:34:27,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:34:27,412 INFO L495 AbstractCegarLoop]: Abstraction has 1624 states and 2437 transitions. [2023-02-18 13:34:27,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-18 13:34:27,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 2437 transitions. [2023-02-18 13:34:27,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-18 13:34:27,414 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:34:27,415 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:34:27,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-18 13:34:27,415 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:34:27,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:34:27,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1291674765, now seen corresponding path program 1 times [2023-02-18 13:34:27,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:34:27,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094103425] [2023-02-18 13:34:27,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:34:27,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:34:27,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:34:27,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:34:27,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:34:27,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:34:27,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:34:27,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:34:27,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:34:27,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094103425] [2023-02-18 13:34:27,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094103425] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:34:27,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:34:27,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 13:34:27,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032774774] [2023-02-18 13:34:27,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:34:27,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 13:34:27,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:34:27,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 13:34:27,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 13:34:27,582 INFO L87 Difference]: Start difference. First operand 1624 states and 2437 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 13:34:30,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:34:31,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:34:31,046 INFO L93 Difference]: Finished difference Result 1856 states and 2829 transitions. [2023-02-18 13:34:31,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 13:34:31,047 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 43 [2023-02-18 13:34:31,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:34:31,053 INFO L225 Difference]: With dead ends: 1856 [2023-02-18 13:34:31,053 INFO L226 Difference]: Without dead ends: 1852 [2023-02-18 13:34:31,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-18 13:34:31,054 INFO L413 NwaCegarLoop]: 635 mSDtfsCounter, 492 mSDsluCounter, 1304 mSDsCounter, 0 mSdLazyCounter, 871 mSolverCounterSat, 221 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 1939 SdHoareTripleChecker+Invalid, 1093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 871 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-02-18 13:34:31,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [508 Valid, 1939 Invalid, 1093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 871 Invalid, 1 Unknown, 0 Unchecked, 3.4s Time] [2023-02-18 13:34:31,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1852 states. [2023-02-18 13:34:31,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1852 to 1657. [2023-02-18 13:34:31,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1657 states, 1379 states have (on average 1.4612037708484409) internal successors, (2015), 1421 states have internal predecessors, (2015), 204 states have call successors, (204), 67 states have call predecessors, (204), 73 states have return successors, (265), 179 states have call predecessors, (265), 189 states have call successors, (265) [2023-02-18 13:34:31,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1657 states to 1657 states and 2484 transitions. [2023-02-18 13:34:31,099 INFO L78 Accepts]: Start accepts. Automaton has 1657 states and 2484 transitions. Word has length 43 [2023-02-18 13:34:31,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:34:31,099 INFO L495 AbstractCegarLoop]: Abstraction has 1657 states and 2484 transitions. [2023-02-18 13:34:31,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 13:34:31,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1657 states and 2484 transitions. [2023-02-18 13:34:31,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-18 13:34:31,100 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:34:31,100 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:34:31,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-18 13:34:31,101 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:34:31,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:34:31,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1850160334, now seen corresponding path program 1 times [2023-02-18 13:34:31,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:34:31,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386691457] [2023-02-18 13:34:31,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:34:31,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:34:31,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:34:31,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:34:31,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:34:31,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:34:31,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:34:31,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:34:31,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:34:31,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386691457] [2023-02-18 13:34:31,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386691457] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:34:31,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:34:31,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 13:34:31,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785884586] [2023-02-18 13:34:31,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:34:31,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 13:34:31,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:34:31,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 13:34:31,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 13:34:31,249 INFO L87 Difference]: Start difference. First operand 1657 states and 2484 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 13:34:34,813 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:34:36,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:34:36,047 INFO L93 Difference]: Finished difference Result 3293 states and 5099 transitions. [2023-02-18 13:34:36,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 13:34:36,048 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 45 [2023-02-18 13:34:36,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:34:36,061 INFO L225 Difference]: With dead ends: 3293 [2023-02-18 13:34:36,061 INFO L226 Difference]: Without dead ends: 3290 [2023-02-18 13:34:36,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-18 13:34:36,064 INFO L413 NwaCegarLoop]: 1008 mSDtfsCounter, 958 mSDsluCounter, 1779 mSDsCounter, 0 mSdLazyCounter, 1355 mSolverCounterSat, 277 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 987 SdHoareTripleChecker+Valid, 2787 SdHoareTripleChecker+Invalid, 1633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 1355 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-02-18 13:34:36,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [987 Valid, 2787 Invalid, 1633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 1355 Invalid, 1 Unknown, 0 Unchecked, 4.7s Time] [2023-02-18 13:34:36,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3290 states. [2023-02-18 13:34:36,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3290 to 2657. [2023-02-18 13:34:36,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2657 states, 2246 states have (on average 1.4746215494211932) internal successors, (3312), 2298 states have internal predecessors, (3312), 292 states have call successors, (292), 107 states have call predecessors, (292), 118 states have return successors, (418), 262 states have call predecessors, (418), 277 states have call successors, (418) [2023-02-18 13:34:36,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2657 states to 2657 states and 4022 transitions. [2023-02-18 13:34:36,145 INFO L78 Accepts]: Start accepts. Automaton has 2657 states and 4022 transitions. Word has length 45 [2023-02-18 13:34:36,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:34:36,146 INFO L495 AbstractCegarLoop]: Abstraction has 2657 states and 4022 transitions. [2023-02-18 13:34:36,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 13:34:36,146 INFO L276 IsEmpty]: Start isEmpty. Operand 2657 states and 4022 transitions. [2023-02-18 13:34:36,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-18 13:34:36,147 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:34:36,147 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:34:36,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-18 13:34:36,147 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:34:36,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:34:36,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1615003555, now seen corresponding path program 1 times [2023-02-18 13:34:36,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:34:36,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376077923] [2023-02-18 13:34:36,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:34:36,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:34:36,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:34:36,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:34:36,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:34:36,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:34:36,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:34:36,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-18 13:34:36,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:34:36,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-18 13:34:36,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:34:36,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:34:36,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:34:36,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376077923] [2023-02-18 13:34:36,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376077923] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:34:36,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:34:36,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-18 13:34:36,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259349641] [2023-02-18 13:34:36,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:34:36,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 13:34:36,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:34:36,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 13:34:36,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-18 13:34:36,355 INFO L87 Difference]: Start difference. First operand 2657 states and 4022 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-18 13:34:39,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:34:41,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:34:41,863 INFO L93 Difference]: Finished difference Result 3942 states and 6165 transitions. [2023-02-18 13:34:41,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-18 13:34:41,863 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 48 [2023-02-18 13:34:41,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:34:41,876 INFO L225 Difference]: With dead ends: 3942 [2023-02-18 13:34:41,876 INFO L226 Difference]: Without dead ends: 3937 [2023-02-18 13:34:41,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2023-02-18 13:34:41,878 INFO L413 NwaCegarLoop]: 870 mSDtfsCounter, 1306 mSDsluCounter, 1824 mSDsCounter, 0 mSdLazyCounter, 1848 mSolverCounterSat, 545 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1327 SdHoareTripleChecker+Valid, 2694 SdHoareTripleChecker+Invalid, 2394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 545 IncrementalHoareTripleChecker+Valid, 1848 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2023-02-18 13:34:41,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1327 Valid, 2694 Invalid, 2394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [545 Valid, 1848 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2023-02-18 13:34:41,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3937 states. [2023-02-18 13:34:41,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3937 to 3272. [2023-02-18 13:34:42,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3272 states, 2761 states have (on average 1.4791742122419413) internal successors, (4084), 2832 states have internal predecessors, (4084), 364 states have call successors, (364), 126 states have call predecessors, (364), 146 states have return successors, (557), 324 states have call predecessors, (557), 349 states have call successors, (557) [2023-02-18 13:34:42,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3272 states to 3272 states and 5005 transitions. [2023-02-18 13:34:42,009 INFO L78 Accepts]: Start accepts. Automaton has 3272 states and 5005 transitions. Word has length 48 [2023-02-18 13:34:42,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:34:42,010 INFO L495 AbstractCegarLoop]: Abstraction has 3272 states and 5005 transitions. [2023-02-18 13:34:42,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-18 13:34:42,010 INFO L276 IsEmpty]: Start isEmpty. Operand 3272 states and 5005 transitions. [2023-02-18 13:34:42,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-18 13:34:42,011 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:34:42,011 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:34:42,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-18 13:34:42,011 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:34:42,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:34:42,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1759276290, now seen corresponding path program 1 times [2023-02-18 13:34:42,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:34:42,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707178268] [2023-02-18 13:34:42,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:34:42,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:34:42,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:34:42,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:34:42,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:34:42,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:34:42,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:34:42,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:34:42,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:34:42,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707178268] [2023-02-18 13:34:42,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707178268] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:34:42,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:34:42,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-18 13:34:42,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465586326] [2023-02-18 13:34:42,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:34:42,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 13:34:42,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:34:42,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 13:34:42,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-18 13:34:42,329 INFO L87 Difference]: Start difference. First operand 3272 states and 5005 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 4 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 13:34:45,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:34:47,736 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:34:48,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:34:48,743 INFO L93 Difference]: Finished difference Result 7046 states and 10914 transitions. [2023-02-18 13:34:48,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 13:34:48,743 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 4 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 46 [2023-02-18 13:34:48,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:34:48,758 INFO L225 Difference]: With dead ends: 7046 [2023-02-18 13:34:48,758 INFO L226 Difference]: Without dead ends: 4021 [2023-02-18 13:34:48,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2023-02-18 13:34:48,768 INFO L413 NwaCegarLoop]: 783 mSDtfsCounter, 2405 mSDsluCounter, 1376 mSDsCounter, 0 mSdLazyCounter, 1285 mSolverCounterSat, 681 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2453 SdHoareTripleChecker+Valid, 2159 SdHoareTripleChecker+Invalid, 1968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 681 IncrementalHoareTripleChecker+Valid, 1285 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2023-02-18 13:34:48,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2453 Valid, 2159 Invalid, 1968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [681 Valid, 1285 Invalid, 2 Unknown, 0 Unchecked, 6.2s Time] [2023-02-18 13:34:48,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4021 states. [2023-02-18 13:34:48,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4021 to 3266. [2023-02-18 13:34:48,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3266 states, 2755 states have (on average 1.4773139745916515) internal successors, (4070), 2826 states have internal predecessors, (4070), 364 states have call successors, (364), 126 states have call predecessors, (364), 146 states have return successors, (557), 324 states have call predecessors, (557), 349 states have call successors, (557) [2023-02-18 13:34:48,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3266 states to 3266 states and 4991 transitions. [2023-02-18 13:34:48,938 INFO L78 Accepts]: Start accepts. Automaton has 3266 states and 4991 transitions. Word has length 46 [2023-02-18 13:34:48,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:34:48,939 INFO L495 AbstractCegarLoop]: Abstraction has 3266 states and 4991 transitions. [2023-02-18 13:34:48,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 4 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 13:34:48,939 INFO L276 IsEmpty]: Start isEmpty. Operand 3266 states and 4991 transitions. [2023-02-18 13:34:48,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-18 13:34:48,940 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:34:48,940 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:34:48,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-18 13:34:48,940 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:34:48,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:34:48,941 INFO L85 PathProgramCache]: Analyzing trace with hash 436509709, now seen corresponding path program 1 times [2023-02-18 13:34:48,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:34:48,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947043421] [2023-02-18 13:34:48,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:34:48,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:34:48,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:34:49,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:34:49,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:34:49,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:34:49,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:34:49,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-18 13:34:49,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:34:49,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:34:49,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:34:49,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947043421] [2023-02-18 13:34:49,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947043421] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:34:49,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:34:49,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-18 13:34:49,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720052968] [2023-02-18 13:34:49,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:34:49,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 13:34:49,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:34:49,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 13:34:49,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-18 13:34:49,126 INFO L87 Difference]: Start difference. First operand 3266 states and 4991 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-18 13:34:52,699 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:34:54,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:34:54,640 INFO L93 Difference]: Finished difference Result 10834 states and 17245 transitions. [2023-02-18 13:34:54,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-18 13:34:54,640 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2023-02-18 13:34:54,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:34:54,666 INFO L225 Difference]: With dead ends: 10834 [2023-02-18 13:34:54,667 INFO L226 Difference]: Without dead ends: 7785 [2023-02-18 13:34:54,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2023-02-18 13:34:54,680 INFO L413 NwaCegarLoop]: 801 mSDtfsCounter, 2172 mSDsluCounter, 1768 mSDsCounter, 0 mSdLazyCounter, 1381 mSolverCounterSat, 628 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2248 SdHoareTripleChecker+Valid, 2569 SdHoareTripleChecker+Invalid, 2010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 628 IncrementalHoareTripleChecker+Valid, 1381 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2023-02-18 13:34:54,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2248 Valid, 2569 Invalid, 2010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [628 Valid, 1381 Invalid, 1 Unknown, 0 Unchecked, 5.2s Time] [2023-02-18 13:34:54,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7785 states. [2023-02-18 13:34:54,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7785 to 6900. [2023-02-18 13:34:54,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6900 states, 5812 states have (on average 1.4893324156916723) internal successors, (8656), 6037 states have internal predecessors, (8656), 801 states have call successors, (801), 234 states have call predecessors, (801), 286 states have return successors, (1391), 659 states have call predecessors, (1391), 789 states have call successors, (1391) [2023-02-18 13:34:54,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6900 states to 6900 states and 10848 transitions. [2023-02-18 13:34:54,968 INFO L78 Accepts]: Start accepts. Automaton has 6900 states and 10848 transitions. Word has length 47 [2023-02-18 13:34:54,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:34:54,968 INFO L495 AbstractCegarLoop]: Abstraction has 6900 states and 10848 transitions. [2023-02-18 13:34:54,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-18 13:34:54,968 INFO L276 IsEmpty]: Start isEmpty. Operand 6900 states and 10848 transitions. [2023-02-18 13:34:54,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-18 13:34:54,969 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:34:54,969 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:34:54,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-18 13:34:54,970 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:34:54,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:34:54,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1335861569, now seen corresponding path program 1 times [2023-02-18 13:34:54,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:34:54,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502802715] [2023-02-18 13:34:54,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:34:54,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:34:55,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:34:55,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:34:55,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:34:55,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:34:55,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:34:55,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-18 13:34:55,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:34:55,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-18 13:34:55,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:34:55,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:34:55,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:34:55,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502802715] [2023-02-18 13:34:55,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502802715] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:34:55,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:34:55,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-18 13:34:55,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194434304] [2023-02-18 13:34:55,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:34:55,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 13:34:55,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:34:55,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 13:34:55,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-18 13:34:55,290 INFO L87 Difference]: Start difference. First operand 6900 states and 10848 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 13:34:59,248 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:35:01,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:35:01,374 INFO L93 Difference]: Finished difference Result 7819 states and 12472 transitions. [2023-02-18 13:35:01,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-18 13:35:01,375 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2023-02-18 13:35:01,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:35:01,398 INFO L225 Difference]: With dead ends: 7819 [2023-02-18 13:35:01,398 INFO L226 Difference]: Without dead ends: 7813 [2023-02-18 13:35:01,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=191, Invalid=511, Unknown=0, NotChecked=0, Total=702 [2023-02-18 13:35:01,403 INFO L413 NwaCegarLoop]: 840 mSDtfsCounter, 2829 mSDsluCounter, 2145 mSDsCounter, 0 mSdLazyCounter, 2276 mSolverCounterSat, 998 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2891 SdHoareTripleChecker+Valid, 2985 SdHoareTripleChecker+Invalid, 3275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 998 IncrementalHoareTripleChecker+Valid, 2276 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2023-02-18 13:35:01,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2891 Valid, 2985 Invalid, 3275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [998 Valid, 2276 Invalid, 1 Unknown, 0 Unchecked, 5.7s Time] [2023-02-18 13:35:01,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7813 states. [2023-02-18 13:35:01,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7813 to 6900. [2023-02-18 13:35:01,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6900 states, 5812 states have (on average 1.4891603578802477) internal successors, (8655), 6037 states have internal predecessors, (8655), 801 states have call successors, (801), 234 states have call predecessors, (801), 286 states have return successors, (1391), 659 states have call predecessors, (1391), 789 states have call successors, (1391) [2023-02-18 13:35:01,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6900 states to 6900 states and 10847 transitions. [2023-02-18 13:35:01,737 INFO L78 Accepts]: Start accepts. Automaton has 6900 states and 10847 transitions. Word has length 48 [2023-02-18 13:35:01,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:35:01,738 INFO L495 AbstractCegarLoop]: Abstraction has 6900 states and 10847 transitions. [2023-02-18 13:35:01,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 13:35:01,738 INFO L276 IsEmpty]: Start isEmpty. Operand 6900 states and 10847 transitions. [2023-02-18 13:35:01,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-18 13:35:01,740 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:35:01,740 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:35:01,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-18 13:35:01,741 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:35:01,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:35:01,741 INFO L85 PathProgramCache]: Analyzing trace with hash 677869713, now seen corresponding path program 1 times [2023-02-18 13:35:01,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:35:01,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203752018] [2023-02-18 13:35:01,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:35:01,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:35:01,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:35:01,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:35:01,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:35:01,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:35:01,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:35:01,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-18 13:35:01,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:35:02,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-18 13:35:02,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:35:02,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:35:02,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:35:02,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203752018] [2023-02-18 13:35:02,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203752018] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:35:02,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:35:02,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-18 13:35:02,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723041900] [2023-02-18 13:35:02,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:35:02,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 13:35:02,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:35:02,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 13:35:02,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-18 13:35:02,020 INFO L87 Difference]: Start difference. First operand 6900 states and 10847 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 13:35:06,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:35:08,597 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:35:11,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:35:11,039 INFO L93 Difference]: Finished difference Result 7815 states and 12466 transitions. [2023-02-18 13:35:11,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-18 13:35:11,039 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2023-02-18 13:35:11,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:35:11,057 INFO L225 Difference]: With dead ends: 7815 [2023-02-18 13:35:11,057 INFO L226 Difference]: Without dead ends: 7809 [2023-02-18 13:35:11,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=191, Invalid=511, Unknown=0, NotChecked=0, Total=702 [2023-02-18 13:35:11,060 INFO L413 NwaCegarLoop]: 840 mSDtfsCounter, 2415 mSDsluCounter, 2490 mSDsCounter, 0 mSdLazyCounter, 2808 mSolverCounterSat, 754 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2478 SdHoareTripleChecker+Valid, 3330 SdHoareTripleChecker+Invalid, 3564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 754 IncrementalHoareTripleChecker+Valid, 2808 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2023-02-18 13:35:11,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2478 Valid, 3330 Invalid, 3564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [754 Valid, 2808 Invalid, 2 Unknown, 0 Unchecked, 8.6s Time] [2023-02-18 13:35:11,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7809 states. [2023-02-18 13:35:11,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7809 to 6900. [2023-02-18 13:35:11,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6900 states, 5812 states have (on average 1.488988300068823) internal successors, (8654), 6037 states have internal predecessors, (8654), 801 states have call successors, (801), 234 states have call predecessors, (801), 286 states have return successors, (1391), 659 states have call predecessors, (1391), 789 states have call successors, (1391) [2023-02-18 13:35:11,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6900 states to 6900 states and 10846 transitions. [2023-02-18 13:35:11,460 INFO L78 Accepts]: Start accepts. Automaton has 6900 states and 10846 transitions. Word has length 49 [2023-02-18 13:35:11,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:35:11,460 INFO L495 AbstractCegarLoop]: Abstraction has 6900 states and 10846 transitions. [2023-02-18 13:35:11,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 13:35:11,461 INFO L276 IsEmpty]: Start isEmpty. Operand 6900 states and 10846 transitions. [2023-02-18 13:35:11,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-18 13:35:11,462 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:35:11,462 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, 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] [2023-02-18 13:35:11,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-18 13:35:11,462 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:35:11,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:35:11,462 INFO L85 PathProgramCache]: Analyzing trace with hash -376802648, now seen corresponding path program 1 times [2023-02-18 13:35:11,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:35:11,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470448334] [2023-02-18 13:35:11,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:35:11,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:35:11,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:35:11,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:35:11,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:35:11,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:35:11,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:35:11,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-18 13:35:11,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:35:11,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-18 13:35:11,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:35:11,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:35:11,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:35:11,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470448334] [2023-02-18 13:35:11,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470448334] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:35:11,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:35:11,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-18 13:35:11,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557941255] [2023-02-18 13:35:11,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:35:11,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 13:35:11,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:35:11,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 13:35:11,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-18 13:35:11,725 INFO L87 Difference]: Start difference. First operand 6900 states and 10846 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-18 13:35:16,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:35:18,132 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:35:19,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:35:19,170 INFO L93 Difference]: Finished difference Result 7824 states and 12487 transitions. [2023-02-18 13:35:19,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 13:35:19,171 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 50 [2023-02-18 13:35:19,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:35:19,191 INFO L225 Difference]: With dead ends: 7824 [2023-02-18 13:35:19,191 INFO L226 Difference]: Without dead ends: 7807 [2023-02-18 13:35:19,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-02-18 13:35:19,196 INFO L413 NwaCegarLoop]: 575 mSDtfsCounter, 717 mSDsluCounter, 2806 mSDsCounter, 0 mSdLazyCounter, 2272 mSolverCounterSat, 242 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 743 SdHoareTripleChecker+Valid, 3381 SdHoareTripleChecker+Invalid, 2516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 2272 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2023-02-18 13:35:19,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [743 Valid, 3381 Invalid, 2516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 2272 Invalid, 2 Unknown, 0 Unchecked, 7.0s Time] [2023-02-18 13:35:19,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7807 states. [2023-02-18 13:35:19,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7807 to 6904. [2023-02-18 13:35:19,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6904 states, 5815 states have (on average 1.4885640584694755) internal successors, (8656), 6042 states have internal predecessors, (8656), 800 states have call successors, (800), 234 states have call predecessors, (800), 288 states have return successors, (1397), 658 states have call predecessors, (1397), 788 states have call successors, (1397) [2023-02-18 13:35:19,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6904 states to 6904 states and 10853 transitions. [2023-02-18 13:35:19,570 INFO L78 Accepts]: Start accepts. Automaton has 6904 states and 10853 transitions. Word has length 50 [2023-02-18 13:35:19,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:35:19,571 INFO L495 AbstractCegarLoop]: Abstraction has 6904 states and 10853 transitions. [2023-02-18 13:35:19,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-18 13:35:19,571 INFO L276 IsEmpty]: Start isEmpty. Operand 6904 states and 10853 transitions. [2023-02-18 13:35:19,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-18 13:35:19,573 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:35:19,573 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:35:19,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-02-18 13:35:19,574 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:35:19,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:35:19,574 INFO L85 PathProgramCache]: Analyzing trace with hash 286289769, now seen corresponding path program 1 times [2023-02-18 13:35:19,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:35:19,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789620085] [2023-02-18 13:35:19,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:35:19,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:35:19,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:35:19,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:35:19,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:35:19,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:35:19,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:35:19,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-18 13:35:19,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:35:19,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-18 13:35:19,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:35:19,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:35:19,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:35:19,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789620085] [2023-02-18 13:35:19,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789620085] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:35:19,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:35:19,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-18 13:35:19,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692741474] [2023-02-18 13:35:19,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:35:19,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 13:35:19,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:35:19,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 13:35:19,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-18 13:35:19,822 INFO L87 Difference]: Start difference. First operand 6904 states and 10853 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-18 13:35:24,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:35:26,823 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:35:27,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:35:27,806 INFO L93 Difference]: Finished difference Result 7822 states and 12483 transitions. [2023-02-18 13:35:27,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 13:35:27,806 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 51 [2023-02-18 13:35:27,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:35:27,825 INFO L225 Difference]: With dead ends: 7822 [2023-02-18 13:35:27,825 INFO L226 Difference]: Without dead ends: 7800 [2023-02-18 13:35:27,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-02-18 13:35:27,831 INFO L413 NwaCegarLoop]: 575 mSDtfsCounter, 715 mSDsluCounter, 2806 mSDsCounter, 0 mSdLazyCounter, 2266 mSolverCounterSat, 238 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 741 SdHoareTripleChecker+Valid, 3381 SdHoareTripleChecker+Invalid, 2506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 2266 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2023-02-18 13:35:27,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [741 Valid, 3381 Invalid, 2506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 2266 Invalid, 2 Unknown, 0 Unchecked, 7.6s Time] [2023-02-18 13:35:27,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7800 states. [2023-02-18 13:35:28,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7800 to 6897. [2023-02-18 13:35:28,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6897 states, 5811 states have (on average 1.4887282739631733) internal successors, (8651), 6038 states have internal predecessors, (8651), 798 states have call successors, (798), 233 states have call predecessors, (798), 287 states have return successors, (1395), 656 states have call predecessors, (1395), 786 states have call successors, (1395) [2023-02-18 13:35:28,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6897 states to 6897 states and 10844 transitions. [2023-02-18 13:35:28,198 INFO L78 Accepts]: Start accepts. Automaton has 6897 states and 10844 transitions. Word has length 51 [2023-02-18 13:35:28,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:35:28,199 INFO L495 AbstractCegarLoop]: Abstraction has 6897 states and 10844 transitions. [2023-02-18 13:35:28,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-18 13:35:28,199 INFO L276 IsEmpty]: Start isEmpty. Operand 6897 states and 10844 transitions. [2023-02-18 13:35:28,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-18 13:35:28,201 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:35:28,201 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:35:28,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-02-18 13:35:28,202 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:35:28,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:35:28,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1945256571, now seen corresponding path program 1 times [2023-02-18 13:35:28,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:35:28,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528904488] [2023-02-18 13:35:28,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:35:28,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:35:28,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:35:28,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:35:28,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:35:28,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:35:28,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:35:28,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-18 13:35:28,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:35:28,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:35:28,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:35:28,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528904488] [2023-02-18 13:35:28,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528904488] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:35:28,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:35:28,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-18 13:35:28,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199279972] [2023-02-18 13:35:28,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:35:28,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 13:35:28,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:35:28,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 13:35:28,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-18 13:35:28,372 INFO L87 Difference]: Start difference. First operand 6897 states and 10844 transitions. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-18 13:35:31,616 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:35:32,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:35:32,445 INFO L93 Difference]: Finished difference Result 13804 states and 22175 transitions. [2023-02-18 13:35:32,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 13:35:32,446 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2023-02-18 13:35:32,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:35:32,463 INFO L225 Difference]: With dead ends: 13804 [2023-02-18 13:35:32,463 INFO L226 Difference]: Without dead ends: 8064 [2023-02-18 13:35:32,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-18 13:35:32,484 INFO L413 NwaCegarLoop]: 625 mSDtfsCounter, 434 mSDsluCounter, 1356 mSDsCounter, 0 mSdLazyCounter, 1010 mSolverCounterSat, 211 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 1981 SdHoareTripleChecker+Invalid, 1222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 1010 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-02-18 13:35:32,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [447 Valid, 1981 Invalid, 1222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 1010 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2023-02-18 13:35:32,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8064 states. [2023-02-18 13:35:32,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8064 to 7053. [2023-02-18 13:35:32,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7053 states, 5967 states have (on average 1.4799731858555387) internal successors, (8831), 6194 states have internal predecessors, (8831), 798 states have call successors, (798), 233 states have call predecessors, (798), 287 states have return successors, (1395), 656 states have call predecessors, (1395), 786 states have call successors, (1395) [2023-02-18 13:35:32,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7053 states to 7053 states and 11024 transitions. [2023-02-18 13:35:32,939 INFO L78 Accepts]: Start accepts. Automaton has 7053 states and 11024 transitions. Word has length 52 [2023-02-18 13:35:32,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:35:32,940 INFO L495 AbstractCegarLoop]: Abstraction has 7053 states and 11024 transitions. [2023-02-18 13:35:32,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-18 13:35:32,940 INFO L276 IsEmpty]: Start isEmpty. Operand 7053 states and 11024 transitions. [2023-02-18 13:35:32,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-18 13:35:32,941 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:35:32,941 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:35:32,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-02-18 13:35:32,941 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:35:32,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:35:32,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1217127572, now seen corresponding path program 1 times [2023-02-18 13:35:32,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:35:32,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472993904] [2023-02-18 13:35:32,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:35:32,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:35:32,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:35:33,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:35:33,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:35:33,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:35:33,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:35:33,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-02-18 13:35:33,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:35:33,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:35:33,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:35:33,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472993904] [2023-02-18 13:35:33,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472993904] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:35:33,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:35:33,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-18 13:35:33,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108882360] [2023-02-18 13:35:33,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:35:33,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 13:35:33,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:35:33,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 13:35:33,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-18 13:35:33,188 INFO L87 Difference]: Start difference. First operand 7053 states and 11024 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-18 13:35:37,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:35:38,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:35:38,066 INFO L93 Difference]: Finished difference Result 8020 states and 12715 transitions. [2023-02-18 13:35:38,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-18 13:35:38,067 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 53 [2023-02-18 13:35:38,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:35:38,112 INFO L225 Difference]: With dead ends: 8020 [2023-02-18 13:35:38,124 INFO L226 Difference]: Without dead ends: 8002 [2023-02-18 13:35:38,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-02-18 13:35:38,130 INFO L413 NwaCegarLoop]: 583 mSDtfsCounter, 907 mSDsluCounter, 2093 mSDsCounter, 0 mSdLazyCounter, 1532 mSolverCounterSat, 335 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 930 SdHoareTripleChecker+Valid, 2676 SdHoareTripleChecker+Invalid, 1868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 335 IncrementalHoareTripleChecker+Valid, 1532 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-02-18 13:35:38,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [930 Valid, 2676 Invalid, 1868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [335 Valid, 1532 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2023-02-18 13:35:38,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8002 states. [2023-02-18 13:35:38,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8002 to 7051. [2023-02-18 13:35:38,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7051 states, 5966 states have (on average 1.479886020784445) internal successors, (8829), 6193 states have internal predecessors, (8829), 797 states have call successors, (797), 233 states have call predecessors, (797), 287 states have return successors, (1394), 655 states have call predecessors, (1394), 785 states have call successors, (1394) [2023-02-18 13:35:38,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7051 states to 7051 states and 11020 transitions. [2023-02-18 13:35:38,505 INFO L78 Accepts]: Start accepts. Automaton has 7051 states and 11020 transitions. Word has length 53 [2023-02-18 13:35:38,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:35:38,505 INFO L495 AbstractCegarLoop]: Abstraction has 7051 states and 11020 transitions. [2023-02-18 13:35:38,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-18 13:35:38,505 INFO L276 IsEmpty]: Start isEmpty. Operand 7051 states and 11020 transitions. [2023-02-18 13:35:38,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-18 13:35:38,506 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:35:38,507 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:35:38,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-02-18 13:35:38,507 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:35:38,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:35:38,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1937199149, now seen corresponding path program 1 times [2023-02-18 13:35:38,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:35:38,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755279920] [2023-02-18 13:35:38,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:35:38,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:35:38,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:35:38,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:35:38,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:35:38,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:35:38,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:35:38,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:35:38,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:35:38,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755279920] [2023-02-18 13:35:38,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755279920] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:35:38,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:35:38,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-18 13:35:38,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978038102] [2023-02-18 13:35:38,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:35:38,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 13:35:38,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:35:38,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 13:35:38,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-18 13:35:38,752 INFO L87 Difference]: Start difference. First operand 7051 states and 11020 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 13:35:42,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:35:43,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:35:43,102 INFO L93 Difference]: Finished difference Result 11721 states and 18614 transitions. [2023-02-18 13:35:43,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-18 13:35:43,102 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2023-02-18 13:35:43,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:35:43,119 INFO L225 Difference]: With dead ends: 11721 [2023-02-18 13:35:43,119 INFO L226 Difference]: Without dead ends: 7953 [2023-02-18 13:35:43,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-02-18 13:35:43,134 INFO L413 NwaCegarLoop]: 591 mSDtfsCounter, 1226 mSDsluCounter, 1168 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 311 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1277 SdHoareTripleChecker+Valid, 1759 SdHoareTripleChecker+Invalid, 1317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-02-18 13:35:43,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1277 Valid, 1759 Invalid, 1317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 1005 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2023-02-18 13:35:43,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7953 states. [2023-02-18 13:35:43,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7953 to 7041. [2023-02-18 13:35:43,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7041 states, 5957 states have (on average 1.4787644787644787) internal successors, (8809), 6184 states have internal predecessors, (8809), 797 states have call successors, (797), 233 states have call predecessors, (797), 286 states have return successors, (1393), 654 states have call predecessors, (1393), 784 states have call successors, (1393) [2023-02-18 13:35:43,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7041 states to 7041 states and 10999 transitions. [2023-02-18 13:35:43,517 INFO L78 Accepts]: Start accepts. Automaton has 7041 states and 10999 transitions. Word has length 52 [2023-02-18 13:35:43,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:35:43,517 INFO L495 AbstractCegarLoop]: Abstraction has 7041 states and 10999 transitions. [2023-02-18 13:35:43,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 13:35:43,517 INFO L276 IsEmpty]: Start isEmpty. Operand 7041 states and 10999 transitions. [2023-02-18 13:35:43,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-18 13:35:43,520 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:35:43,520 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:35:43,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-02-18 13:35:43,521 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:35:43,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:35:43,521 INFO L85 PathProgramCache]: Analyzing trace with hash 872726643, now seen corresponding path program 1 times [2023-02-18 13:35:43,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:35:43,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651557301] [2023-02-18 13:35:43,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:35:43,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:35:43,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:35:43,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:35:43,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:35:43,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:35:43,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:35:43,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-18 13:35:43,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:35:43,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-18 13:35:43,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:35:43,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:35:43,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:35:43,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651557301] [2023-02-18 13:35:43,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651557301] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:35:43,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:35:43,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-18 13:35:43,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172828011] [2023-02-18 13:35:43,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:35:43,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 13:35:43,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:35:43,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 13:35:43,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-02-18 13:35:43,764 INFO L87 Difference]: Start difference. First operand 7041 states and 10999 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-18 13:35:47,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:35:48,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:35:48,390 INFO L93 Difference]: Finished difference Result 8024 states and 12754 transitions. [2023-02-18 13:35:48,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-18 13:35:48,391 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 55 [2023-02-18 13:35:48,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:35:48,409 INFO L225 Difference]: With dead ends: 8024 [2023-02-18 13:35:48,409 INFO L226 Difference]: Without dead ends: 8008 [2023-02-18 13:35:48,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-02-18 13:35:48,413 INFO L413 NwaCegarLoop]: 579 mSDtfsCounter, 978 mSDsluCounter, 2603 mSDsCounter, 0 mSdLazyCounter, 1867 mSolverCounterSat, 430 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1001 SdHoareTripleChecker+Valid, 3182 SdHoareTripleChecker+Invalid, 2298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 430 IncrementalHoareTripleChecker+Valid, 1867 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-02-18 13:35:48,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1001 Valid, 3182 Invalid, 2298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [430 Valid, 1867 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2023-02-18 13:35:48,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8008 states. [2023-02-18 13:35:48,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8008 to 7047. [2023-02-18 13:35:48,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7047 states, 5960 states have (on average 1.4785234899328858) internal successors, (8812), 6190 states have internal predecessors, (8812), 797 states have call successors, (797), 233 states have call predecessors, (797), 289 states have return successors, (1415), 654 states have call predecessors, (1415), 784 states have call successors, (1415) [2023-02-18 13:35:48,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7047 states to 7047 states and 11024 transitions. [2023-02-18 13:35:48,794 INFO L78 Accepts]: Start accepts. Automaton has 7047 states and 11024 transitions. Word has length 55 [2023-02-18 13:35:48,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:35:48,794 INFO L495 AbstractCegarLoop]: Abstraction has 7047 states and 11024 transitions. [2023-02-18 13:35:48,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-18 13:35:48,795 INFO L276 IsEmpty]: Start isEmpty. Operand 7047 states and 11024 transitions. [2023-02-18 13:35:48,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-18 13:35:48,796 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:35:48,796 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:35:48,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-02-18 13:35:48,797 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:35:48,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:35:48,797 INFO L85 PathProgramCache]: Analyzing trace with hash 555700014, now seen corresponding path program 1 times [2023-02-18 13:35:48,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:35:48,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512532996] [2023-02-18 13:35:48,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:35:48,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:35:48,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:35:48,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:35:48,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:35:48,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:35:48,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:35:48,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:35:48,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:35:48,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512532996] [2023-02-18 13:35:48,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512532996] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:35:48,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:35:48,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 13:35:48,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806574981] [2023-02-18 13:35:48,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:35:48,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 13:35:48,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:35:48,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 13:35:48,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 13:35:48,925 INFO L87 Difference]: Start difference. First operand 7047 states and 11024 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 13:35:52,203 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:35:54,272 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:35:55,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:35:55,985 INFO L93 Difference]: Finished difference Result 10992 states and 17757 transitions. [2023-02-18 13:35:55,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 13:35:55,986 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 54 [2023-02-18 13:35:55,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:35:56,012 INFO L225 Difference]: With dead ends: 10992 [2023-02-18 13:35:56,012 INFO L226 Difference]: Without dead ends: 10979 [2023-02-18 13:35:56,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-18 13:35:56,018 INFO L413 NwaCegarLoop]: 1030 mSDtfsCounter, 998 mSDsluCounter, 1801 mSDsCounter, 0 mSdLazyCounter, 1357 mSolverCounterSat, 276 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1029 SdHoareTripleChecker+Valid, 2831 SdHoareTripleChecker+Invalid, 1635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 1357 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2023-02-18 13:35:56,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1029 Valid, 2831 Invalid, 1635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 1357 Invalid, 2 Unknown, 0 Unchecked, 6.5s Time] [2023-02-18 13:35:56,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10979 states. [2023-02-18 13:35:56,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10979 to 8362. [2023-02-18 13:35:56,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8362 states, 7112 states have (on average 1.4822834645669292) internal successors, (10542), 7344 states have internal predecessors, (10542), 910 states have call successors, (910), 275 states have call predecessors, (910), 339 states have return successors, (1687), 773 states have call predecessors, (1687), 897 states have call successors, (1687) [2023-02-18 13:35:56,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8362 states to 8362 states and 13139 transitions. [2023-02-18 13:35:56,491 INFO L78 Accepts]: Start accepts. Automaton has 8362 states and 13139 transitions. Word has length 54 [2023-02-18 13:35:56,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:35:56,491 INFO L495 AbstractCegarLoop]: Abstraction has 8362 states and 13139 transitions. [2023-02-18 13:35:56,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 13:35:56,491 INFO L276 IsEmpty]: Start isEmpty. Operand 8362 states and 13139 transitions. [2023-02-18 13:35:56,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-18 13:35:56,493 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:35:56,493 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:35:56,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-02-18 13:35:56,493 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:35:56,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:35:56,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1129689134, now seen corresponding path program 1 times [2023-02-18 13:35:56,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:35:56,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984978208] [2023-02-18 13:35:56,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:35:56,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:35:56,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:35:56,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:35:56,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:35:56,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:35:56,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:35:56,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:35:56,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:35:56,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984978208] [2023-02-18 13:35:56,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984978208] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:35:56,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:35:56,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-18 13:35:56,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724607877] [2023-02-18 13:35:56,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:35:56,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 13:35:56,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:35:56,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 13:35:56,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-18 13:35:56,699 INFO L87 Difference]: Start difference. First operand 8362 states and 13139 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 13:35:59,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:36:00,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:36:00,898 INFO L93 Difference]: Finished difference Result 13163 states and 20813 transitions. [2023-02-18 13:36:00,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-18 13:36:00,899 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 54 [2023-02-18 13:36:00,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:36:00,917 INFO L225 Difference]: With dead ends: 13163 [2023-02-18 13:36:00,917 INFO L226 Difference]: Without dead ends: 8839 [2023-02-18 13:36:00,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-02-18 13:36:00,932 INFO L413 NwaCegarLoop]: 590 mSDtfsCounter, 1208 mSDsluCounter, 1169 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 296 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1259 SdHoareTripleChecker+Valid, 1759 SdHoareTripleChecker+Invalid, 1257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-02-18 13:36:00,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1259 Valid, 1759 Invalid, 1257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 960 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2023-02-18 13:36:00,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8839 states. [2023-02-18 13:36:01,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8839 to 6799. [2023-02-18 13:36:01,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6799 states, 5772 states have (on average 1.48007623007623) internal successors, (8543), 5976 states have internal predecessors, (8543), 751 states have call successors, (751), 230 states have call predecessors, (751), 275 states have return successors, (1161), 623 states have call predecessors, (1161), 738 states have call successors, (1161) [2023-02-18 13:36:01,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6799 states to 6799 states and 10455 transitions. [2023-02-18 13:36:01,352 INFO L78 Accepts]: Start accepts. Automaton has 6799 states and 10455 transitions. Word has length 54 [2023-02-18 13:36:01,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:36:01,353 INFO L495 AbstractCegarLoop]: Abstraction has 6799 states and 10455 transitions. [2023-02-18 13:36:01,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 13:36:01,353 INFO L276 IsEmpty]: Start isEmpty. Operand 6799 states and 10455 transitions. [2023-02-18 13:36:01,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-18 13:36:01,354 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:36:01,354 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:36:01,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-02-18 13:36:01,354 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:36:01,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:36:01,355 INFO L85 PathProgramCache]: Analyzing trace with hash 238766756, now seen corresponding path program 1 times [2023-02-18 13:36:01,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:36:01,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387214362] [2023-02-18 13:36:01,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:36:01,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:36:01,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:36:01,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:36:01,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:36:01,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:36:01,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:36:01,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-18 13:36:01,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:36:01,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:36:01,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:36:01,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387214362] [2023-02-18 13:36:01,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387214362] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:36:01,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:36:01,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-18 13:36:01,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931453043] [2023-02-18 13:36:01,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:36:01,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 13:36:01,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:36:01,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 13:36:01,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-18 13:36:01,520 INFO L87 Difference]: Start difference. First operand 6799 states and 10455 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-18 13:36:05,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:36:06,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:36:06,063 INFO L93 Difference]: Finished difference Result 7691 states and 11990 transitions. [2023-02-18 13:36:06,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-18 13:36:06,064 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 55 [2023-02-18 13:36:06,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:36:06,078 INFO L225 Difference]: With dead ends: 7691 [2023-02-18 13:36:06,078 INFO L226 Difference]: Without dead ends: 7673 [2023-02-18 13:36:06,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-02-18 13:36:06,081 INFO L413 NwaCegarLoop]: 586 mSDtfsCounter, 900 mSDsluCounter, 2096 mSDsCounter, 0 mSdLazyCounter, 1531 mSolverCounterSat, 332 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 923 SdHoareTripleChecker+Valid, 2682 SdHoareTripleChecker+Invalid, 1864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 1531 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-02-18 13:36:06,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [923 Valid, 2682 Invalid, 1864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 1531 Invalid, 1 Unknown, 0 Unchecked, 4.0s Time] [2023-02-18 13:36:06,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7673 states. [2023-02-18 13:36:06,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7673 to 6796. [2023-02-18 13:36:06,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6796 states, 5770 states have (on average 1.4800693240901213) internal successors, (8540), 5974 states have internal predecessors, (8540), 750 states have call successors, (750), 230 states have call predecessors, (750), 275 states have return successors, (1160), 622 states have call predecessors, (1160), 737 states have call successors, (1160) [2023-02-18 13:36:06,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6796 states to 6796 states and 10450 transitions. [2023-02-18 13:36:06,528 INFO L78 Accepts]: Start accepts. Automaton has 6796 states and 10450 transitions. Word has length 55 [2023-02-18 13:36:06,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:36:06,528 INFO L495 AbstractCegarLoop]: Abstraction has 6796 states and 10450 transitions. [2023-02-18 13:36:06,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-18 13:36:06,528 INFO L276 IsEmpty]: Start isEmpty. Operand 6796 states and 10450 transitions. [2023-02-18 13:36:06,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-18 13:36:06,531 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:36:06,531 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:36:06,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-02-18 13:36:06,531 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:36:06,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:36:06,532 INFO L85 PathProgramCache]: Analyzing trace with hash 499005845, now seen corresponding path program 1 times [2023-02-18 13:36:06,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:36:06,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074972663] [2023-02-18 13:36:06,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:36:06,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:36:06,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:36:06,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:36:06,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:36:06,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:36:06,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:36:06,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:36:06,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:36:06,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074972663] [2023-02-18 13:36:06,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074972663] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:36:06,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:36:06,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-18 13:36:06,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319506417] [2023-02-18 13:36:06,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:36:06,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 13:36:06,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:36:06,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 13:36:06,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-18 13:36:06,795 INFO L87 Difference]: Start difference. First operand 6796 states and 10450 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 4 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 13:36:09,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:36:11,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:36:11,955 INFO L93 Difference]: Finished difference Result 9126 states and 14313 transitions. [2023-02-18 13:36:11,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 13:36:11,955 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 4 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55 [2023-02-18 13:36:11,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:36:11,970 INFO L225 Difference]: With dead ends: 9126 [2023-02-18 13:36:11,970 INFO L226 Difference]: Without dead ends: 9122 [2023-02-18 13:36:11,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2023-02-18 13:36:11,973 INFO L413 NwaCegarLoop]: 975 mSDtfsCounter, 1708 mSDsluCounter, 1641 mSDsCounter, 0 mSdLazyCounter, 1436 mSolverCounterSat, 487 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1765 SdHoareTripleChecker+Valid, 2616 SdHoareTripleChecker+Invalid, 1924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 487 IncrementalHoareTripleChecker+Valid, 1436 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-02-18 13:36:11,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1765 Valid, 2616 Invalid, 1924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [487 Valid, 1436 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2023-02-18 13:36:11,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9122 states. [2023-02-18 13:36:12,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9122 to 6807. [2023-02-18 13:36:12,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6807 states, 5780 states have (on average 1.479757785467128) internal successors, (8553), 5982 states have internal predecessors, (8553), 750 states have call successors, (750), 230 states have call predecessors, (750), 276 states have return successors, (1164), 625 states have call predecessors, (1164), 737 states have call successors, (1164) [2023-02-18 13:36:12,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6807 states to 6807 states and 10467 transitions. [2023-02-18 13:36:12,371 INFO L78 Accepts]: Start accepts. Automaton has 6807 states and 10467 transitions. Word has length 55 [2023-02-18 13:36:12,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:36:12,371 INFO L495 AbstractCegarLoop]: Abstraction has 6807 states and 10467 transitions. [2023-02-18 13:36:12,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 4 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 13:36:12,372 INFO L276 IsEmpty]: Start isEmpty. Operand 6807 states and 10467 transitions. [2023-02-18 13:36:12,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-18 13:36:12,373 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:36:12,373 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:36:12,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-02-18 13:36:12,373 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:36:12,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:36:12,374 INFO L85 PathProgramCache]: Analyzing trace with hash 499282675, now seen corresponding path program 1 times [2023-02-18 13:36:12,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:36:12,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642572062] [2023-02-18 13:36:12,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:36:12,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:36:12,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:36:12,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:36:12,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:36:12,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:36:12,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:36:12,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:36:12,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:36:12,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642572062] [2023-02-18 13:36:12,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642572062] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:36:12,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:36:12,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-18 13:36:12,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015787811] [2023-02-18 13:36:12,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:36:12,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 13:36:12,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:36:12,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 13:36:12,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-18 13:36:12,621 INFO L87 Difference]: Start difference. First operand 6807 states and 10467 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 13:36:16,971 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:36:17,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:36:17,997 INFO L93 Difference]: Finished difference Result 7650 states and 11920 transitions. [2023-02-18 13:36:17,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 13:36:17,999 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 55 [2023-02-18 13:36:17,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:36:18,013 INFO L225 Difference]: With dead ends: 7650 [2023-02-18 13:36:18,014 INFO L226 Difference]: Without dead ends: 7607 [2023-02-18 13:36:18,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-02-18 13:36:18,018 INFO L413 NwaCegarLoop]: 609 mSDtfsCounter, 423 mSDsluCounter, 2955 mSDsCounter, 0 mSdLazyCounter, 1539 mSolverCounterSat, 179 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 3564 SdHoareTripleChecker+Invalid, 1719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 1539 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-02-18 13:36:18,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [436 Valid, 3564 Invalid, 1719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 1539 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2023-02-18 13:36:18,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7607 states. [2023-02-18 13:36:18,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7607 to 6777. [2023-02-18 13:36:18,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6777 states, 5751 states have (on average 1.480264301860546) internal successors, (8513), 5953 states have internal predecessors, (8513), 749 states have call successors, (749), 230 states have call predecessors, (749), 276 states have return successors, (1162), 624 states have call predecessors, (1162), 736 states have call successors, (1162) [2023-02-18 13:36:18,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6777 states to 6777 states and 10424 transitions. [2023-02-18 13:36:18,451 INFO L78 Accepts]: Start accepts. Automaton has 6777 states and 10424 transitions. Word has length 55 [2023-02-18 13:36:18,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:36:18,451 INFO L495 AbstractCegarLoop]: Abstraction has 6777 states and 10424 transitions. [2023-02-18 13:36:18,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 13:36:18,451 INFO L276 IsEmpty]: Start isEmpty. Operand 6777 states and 10424 transitions. [2023-02-18 13:36:18,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-18 13:36:18,452 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:36:18,452 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:36:18,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-02-18 13:36:18,453 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:36:18,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:36:18,453 INFO L85 PathProgramCache]: Analyzing trace with hash 948026652, now seen corresponding path program 1 times [2023-02-18 13:36:18,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:36:18,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919329061] [2023-02-18 13:36:18,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:36:18,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:36:18,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:36:18,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:36:18,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:36:18,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:36:18,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:36:18,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-18 13:36:18,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:36:18,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-02-18 13:36:18,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:36:18,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:36:18,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:36:18,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919329061] [2023-02-18 13:36:18,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919329061] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:36:18,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:36:18,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-18 13:36:18,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545279314] [2023-02-18 13:36:18,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:36:18,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 13:36:18,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:36:18,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 13:36:18,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-02-18 13:36:18,720 INFO L87 Difference]: Start difference. First operand 6777 states and 10424 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-18 13:36:22,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:36:23,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:36:23,634 INFO L93 Difference]: Finished difference Result 13421 states and 21123 transitions. [2023-02-18 13:36:23,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-18 13:36:23,635 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 60 [2023-02-18 13:36:23,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:36:23,649 INFO L225 Difference]: With dead ends: 13421 [2023-02-18 13:36:23,650 INFO L226 Difference]: Without dead ends: 7857 [2023-02-18 13:36:23,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2023-02-18 13:36:23,664 INFO L413 NwaCegarLoop]: 558 mSDtfsCounter, 401 mSDsluCounter, 2420 mSDsCounter, 0 mSdLazyCounter, 1791 mSolverCounterSat, 208 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 2978 SdHoareTripleChecker+Invalid, 2000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 1791 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-02-18 13:36:23,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 2978 Invalid, 2000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 1791 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2023-02-18 13:36:23,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7857 states. [2023-02-18 13:36:24,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7857 to 6853. [2023-02-18 13:36:24,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6853 states, 5807 states have (on average 1.4756328568968486) internal successors, (8569), 6017 states have internal predecessors, (8569), 749 states have call successors, (749), 230 states have call predecessors, (749), 296 states have return successors, (1233), 636 states have call predecessors, (1233), 736 states have call successors, (1233) [2023-02-18 13:36:24,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6853 states to 6853 states and 10551 transitions. [2023-02-18 13:36:24,077 INFO L78 Accepts]: Start accepts. Automaton has 6853 states and 10551 transitions. Word has length 60 [2023-02-18 13:36:24,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:36:24,077 INFO L495 AbstractCegarLoop]: Abstraction has 6853 states and 10551 transitions. [2023-02-18 13:36:24,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-18 13:36:24,077 INFO L276 IsEmpty]: Start isEmpty. Operand 6853 states and 10551 transitions. [2023-02-18 13:36:24,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-02-18 13:36:24,084 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:36:24,084 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:36:24,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-02-18 13:36:24,084 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:36:24,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:36:24,085 INFO L85 PathProgramCache]: Analyzing trace with hash -749476623, now seen corresponding path program 1 times [2023-02-18 13:36:24,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:36:24,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963966584] [2023-02-18 13:36:24,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:36:24,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:36:24,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:36:24,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:36:24,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:36:24,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:36:24,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:36:24,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-18 13:36:24,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:36:24,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-18 13:36:24,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:36:24,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:36:24,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:36:24,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963966584] [2023-02-18 13:36:24,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963966584] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:36:24,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:36:24,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-02-18 13:36:24,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952945057] [2023-02-18 13:36:24,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:36:24,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 13:36:24,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:36:24,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 13:36:24,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-02-18 13:36:24,488 INFO L87 Difference]: Start difference. First operand 6853 states and 10551 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-18 13:36:29,164 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:36:30,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:36:30,416 INFO L93 Difference]: Finished difference Result 7755 states and 12177 transitions. [2023-02-18 13:36:30,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-18 13:36:30,416 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 62 [2023-02-18 13:36:30,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:36:30,431 INFO L225 Difference]: With dead ends: 7755 [2023-02-18 13:36:30,431 INFO L226 Difference]: Without dead ends: 7741 [2023-02-18 13:36:30,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-02-18 13:36:30,435 INFO L413 NwaCegarLoop]: 524 mSDtfsCounter, 952 mSDsluCounter, 3500 mSDsCounter, 0 mSdLazyCounter, 3004 mSolverCounterSat, 426 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 976 SdHoareTripleChecker+Valid, 4024 SdHoareTripleChecker+Invalid, 3431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 426 IncrementalHoareTripleChecker+Valid, 3004 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2023-02-18 13:36:30,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [976 Valid, 4024 Invalid, 3431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [426 Valid, 3004 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2023-02-18 13:36:30,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7741 states. [2023-02-18 13:36:30,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7741 to 6855. [2023-02-18 13:36:30,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6855 states, 5808 states have (on average 1.475550964187328) internal successors, (8570), 6019 states have internal predecessors, (8570), 749 states have call successors, (749), 230 states have call predecessors, (749), 297 states have return successors, (1248), 636 states have call predecessors, (1248), 736 states have call successors, (1248) [2023-02-18 13:36:30,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6855 states to 6855 states and 10567 transitions. [2023-02-18 13:36:30,942 INFO L78 Accepts]: Start accepts. Automaton has 6855 states and 10567 transitions. Word has length 62 [2023-02-18 13:36:30,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:36:30,944 INFO L495 AbstractCegarLoop]: Abstraction has 6855 states and 10567 transitions. [2023-02-18 13:36:30,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-18 13:36:30,944 INFO L276 IsEmpty]: Start isEmpty. Operand 6855 states and 10567 transitions. [2023-02-18 13:36:30,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-02-18 13:36:30,945 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:36:30,945 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:36:30,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-02-18 13:36:30,946 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:36:30,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:36:30,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1416668636, now seen corresponding path program 1 times [2023-02-18 13:36:30,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:36:30,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386633561] [2023-02-18 13:36:30,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:36:30,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:36:30,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:36:31,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:36:31,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:36:31,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:36:31,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:36:31,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-18 13:36:31,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:36:31,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-18 13:36:31,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:36:31,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:36:31,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:36:31,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-02-18 13:36:31,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:36:31,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:36:31,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:36:31,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386633561] [2023-02-18 13:36:31,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386633561] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:36:31,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:36:31,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-18 13:36:31,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501311113] [2023-02-18 13:36:31,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:36:31,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 13:36:31,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:36:31,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 13:36:31,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-18 13:36:31,145 INFO L87 Difference]: Start difference. First operand 6855 states and 10567 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-18 13:36:35,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:36:37,052 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:36:39,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:36:39,539 INFO L93 Difference]: Finished difference Result 10875 states and 17003 transitions. [2023-02-18 13:36:39,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-18 13:36:39,539 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 65 [2023-02-18 13:36:39,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:36:39,566 INFO L225 Difference]: With dead ends: 10875 [2023-02-18 13:36:39,566 INFO L226 Difference]: Without dead ends: 7624 [2023-02-18 13:36:39,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2023-02-18 13:36:39,574 INFO L413 NwaCegarLoop]: 948 mSDtfsCounter, 965 mSDsluCounter, 1881 mSDsCounter, 0 mSdLazyCounter, 1901 mSolverCounterSat, 347 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1008 SdHoareTripleChecker+Valid, 2829 SdHoareTripleChecker+Invalid, 2250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 347 IncrementalHoareTripleChecker+Valid, 1901 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2023-02-18 13:36:39,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1008 Valid, 2829 Invalid, 2250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 1901 Invalid, 2 Unknown, 0 Unchecked, 7.7s Time] [2023-02-18 13:36:39,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7624 states. [2023-02-18 13:36:39,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7624 to 6723. [2023-02-18 13:36:40,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6723 states, 5693 states have (on average 1.476725803618479) internal successors, (8407), 5908 states have internal predecessors, (8407), 738 states have call successors, (738), 227 states have call predecessors, (738), 291 states have return successors, (1189), 617 states have call predecessors, (1189), 717 states have call successors, (1189) [2023-02-18 13:36:40,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6723 states to 6723 states and 10334 transitions. [2023-02-18 13:36:40,018 INFO L78 Accepts]: Start accepts. Automaton has 6723 states and 10334 transitions. Word has length 65 [2023-02-18 13:36:40,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:36:40,019 INFO L495 AbstractCegarLoop]: Abstraction has 6723 states and 10334 transitions. [2023-02-18 13:36:40,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-18 13:36:40,019 INFO L276 IsEmpty]: Start isEmpty. Operand 6723 states and 10334 transitions. [2023-02-18 13:36:40,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-02-18 13:36:40,021 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:36:40,021 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:36:40,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-02-18 13:36:40,022 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:36:40,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:36:40,022 INFO L85 PathProgramCache]: Analyzing trace with hash -340114262, now seen corresponding path program 1 times [2023-02-18 13:36:40,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:36:40,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671340613] [2023-02-18 13:36:40,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:36:40,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:36:40,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:36:40,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:36:40,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:36:40,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:36:40,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:36:40,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-18 13:36:40,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:36:40,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:36:40,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:36:40,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-02-18 13:36:40,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:36:40,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:36:40,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:36:40,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671340613] [2023-02-18 13:36:40,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671340613] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:36:40,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:36:40,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-18 13:36:40,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109845227] [2023-02-18 13:36:40,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:36:40,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 13:36:40,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:36:40,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 13:36:40,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-18 13:36:40,334 INFO L87 Difference]: Start difference. First operand 6723 states and 10334 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-18 13:36:43,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:36:44,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:36:44,662 INFO L93 Difference]: Finished difference Result 13105 states and 20530 transitions. [2023-02-18 13:36:44,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 13:36:44,663 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 66 [2023-02-18 13:36:44,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:36:44,678 INFO L225 Difference]: With dead ends: 13105 [2023-02-18 13:36:44,679 INFO L226 Difference]: Without dead ends: 7568 [2023-02-18 13:36:44,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-18 13:36:44,692 INFO L413 NwaCegarLoop]: 571 mSDtfsCounter, 466 mSDsluCounter, 1159 mSDsCounter, 0 mSdLazyCounter, 906 mSolverCounterSat, 265 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 1730 SdHoareTripleChecker+Invalid, 1172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 906 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-02-18 13:36:44,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [479 Valid, 1730 Invalid, 1172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 906 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2023-02-18 13:36:44,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7568 states. [2023-02-18 13:36:45,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7568 to 6629. [2023-02-18 13:36:45,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6629 states, 5601 states have (on average 1.4767005891805034) internal successors, (8271), 5826 states have internal predecessors, (8271), 744 states have call successors, (744), 227 states have call predecessors, (744), 283 states have return successors, (1184), 605 states have call predecessors, (1184), 723 states have call successors, (1184) [2023-02-18 13:36:45,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6629 states to 6629 states and 10199 transitions. [2023-02-18 13:36:45,172 INFO L78 Accepts]: Start accepts. Automaton has 6629 states and 10199 transitions. Word has length 66 [2023-02-18 13:36:45,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:36:45,173 INFO L495 AbstractCegarLoop]: Abstraction has 6629 states and 10199 transitions. [2023-02-18 13:36:45,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-18 13:36:45,173 INFO L276 IsEmpty]: Start isEmpty. Operand 6629 states and 10199 transitions. [2023-02-18 13:36:45,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-02-18 13:36:45,174 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:36:45,174 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:36:45,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-02-18 13:36:45,175 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:36:45,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:36:45,175 INFO L85 PathProgramCache]: Analyzing trace with hash 437037204, now seen corresponding path program 1 times [2023-02-18 13:36:45,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:36:45,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502135126] [2023-02-18 13:36:45,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:36:45,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:36:45,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:36:45,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:36:45,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:36:45,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:36:45,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:36:45,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-02-18 13:36:45,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:36:45,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:36:45,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:36:45,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502135126] [2023-02-18 13:36:45,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502135126] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:36:45,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:36:45,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-18 13:36:45,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138528708] [2023-02-18 13:36:45,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:36:45,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 13:36:45,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:36:45,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 13:36:45,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-02-18 13:36:45,412 INFO L87 Difference]: Start difference. First operand 6629 states and 10199 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 6 states have internal predecessors, (58), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-18 13:36:49,700 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:36:50,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:36:50,981 INFO L93 Difference]: Finished difference Result 7477 states and 11670 transitions. [2023-02-18 13:36:50,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-18 13:36:50,982 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 6 states have internal predecessors, (58), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 65 [2023-02-18 13:36:50,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:36:50,995 INFO L225 Difference]: With dead ends: 7477 [2023-02-18 13:36:50,996 INFO L226 Difference]: Without dead ends: 7459 [2023-02-18 13:36:50,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2023-02-18 13:36:51,000 INFO L413 NwaCegarLoop]: 531 mSDtfsCounter, 902 mSDsluCounter, 3120 mSDsCounter, 0 mSdLazyCounter, 2630 mSolverCounterSat, 331 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 926 SdHoareTripleChecker+Valid, 3651 SdHoareTripleChecker+Invalid, 2962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 331 IncrementalHoareTripleChecker+Valid, 2630 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2023-02-18 13:36:51,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [926 Valid, 3651 Invalid, 2962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [331 Valid, 2630 Invalid, 1 Unknown, 0 Unchecked, 4.9s Time] [2023-02-18 13:36:51,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7459 states. [2023-02-18 13:36:51,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7459 to 6625. [2023-02-18 13:36:51,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6625 states, 5598 states have (on average 1.476777420507324) internal successors, (8267), 5823 states have internal predecessors, (8267), 743 states have call successors, (743), 227 states have call predecessors, (743), 283 states have return successors, (1183), 604 states have call predecessors, (1183), 722 states have call successors, (1183) [2023-02-18 13:36:51,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6625 states to 6625 states and 10193 transitions. [2023-02-18 13:36:51,492 INFO L78 Accepts]: Start accepts. Automaton has 6625 states and 10193 transitions. Word has length 65 [2023-02-18 13:36:51,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:36:51,492 INFO L495 AbstractCegarLoop]: Abstraction has 6625 states and 10193 transitions. [2023-02-18 13:36:51,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 6 states have internal predecessors, (58), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-18 13:36:51,493 INFO L276 IsEmpty]: Start isEmpty. Operand 6625 states and 10193 transitions. [2023-02-18 13:36:51,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-18 13:36:51,494 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:36:51,494 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:36:51,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-02-18 13:36:51,494 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:36:51,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:36:51,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1869722635, now seen corresponding path program 1 times [2023-02-18 13:36:51,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:36:51,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329394594] [2023-02-18 13:36:51,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:36:51,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:36:51,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:36:51,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:36:51,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:36:51,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:36:51,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:36:51,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-18 13:36:51,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:36:51,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-18 13:36:51,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:36:51,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:36:51,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:36:51,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329394594] [2023-02-18 13:36:51,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329394594] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:36:51,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:36:51,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-18 13:36:51,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614434734] [2023-02-18 13:36:51,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:36:51,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 13:36:51,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:36:51,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 13:36:51,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-02-18 13:36:51,656 INFO L87 Difference]: Start difference. First operand 6625 states and 10193 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 13:36:55,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:36:56,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:36:56,686 INFO L93 Difference]: Finished difference Result 10441 states and 16350 transitions. [2023-02-18 13:36:56,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-18 13:36:56,686 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 67 [2023-02-18 13:36:56,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:36:56,698 INFO L225 Difference]: With dead ends: 10441 [2023-02-18 13:36:56,698 INFO L226 Difference]: Without dead ends: 7793 [2023-02-18 13:36:56,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2023-02-18 13:36:56,705 INFO L413 NwaCegarLoop]: 520 mSDtfsCounter, 954 mSDsluCounter, 1322 mSDsCounter, 0 mSdLazyCounter, 1288 mSolverCounterSat, 358 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 976 SdHoareTripleChecker+Valid, 1842 SdHoareTripleChecker+Invalid, 1647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 1288 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-02-18 13:36:56,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [976 Valid, 1842 Invalid, 1647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 1288 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2023-02-18 13:36:56,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7793 states. [2023-02-18 13:36:57,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7793 to 6847. [2023-02-18 13:36:57,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6847 states, 5810 states have (on average 1.4731497418244406) internal successors, (8559), 6043 states have internal predecessors, (8559), 743 states have call successors, (743), 227 states have call predecessors, (743), 293 states have return successors, (1198), 606 states have call predecessors, (1198), 722 states have call successors, (1198) [2023-02-18 13:36:57,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6847 states to 6847 states and 10500 transitions. [2023-02-18 13:36:57,165 INFO L78 Accepts]: Start accepts. Automaton has 6847 states and 10500 transitions. Word has length 67 [2023-02-18 13:36:57,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:36:57,165 INFO L495 AbstractCegarLoop]: Abstraction has 6847 states and 10500 transitions. [2023-02-18 13:36:57,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 13:36:57,166 INFO L276 IsEmpty]: Start isEmpty. Operand 6847 states and 10500 transitions. [2023-02-18 13:36:57,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-02-18 13:36:57,167 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:36:57,167 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:36:57,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-02-18 13:36:57,167 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:36:57,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:36:57,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1466440038, now seen corresponding path program 1 times [2023-02-18 13:36:57,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:36:57,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779647155] [2023-02-18 13:36:57,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:36:57,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:36:57,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:36:57,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:36:57,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:36:57,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:36:57,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:36:57,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-18 13:36:57,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:36:57,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-02-18 13:36:57,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:36:57,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-02-18 13:36:57,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:36:57,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:36:57,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:36:57,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779647155] [2023-02-18 13:36:57,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779647155] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:36:57,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:36:57,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-18 13:36:57,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33171489] [2023-02-18 13:36:57,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:36:57,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 13:36:57,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:36:57,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 13:36:57,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-18 13:36:57,375 INFO L87 Difference]: Start difference. First operand 6847 states and 10500 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-18 13:37:01,148 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:37:03,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:37:03,584 INFO L93 Difference]: Finished difference Result 9490 states and 14566 transitions. [2023-02-18 13:37:03,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-18 13:37:03,585 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2023-02-18 13:37:03,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:37:03,595 INFO L225 Difference]: With dead ends: 9490 [2023-02-18 13:37:03,595 INFO L226 Difference]: Without dead ends: 5437 [2023-02-18 13:37:03,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2023-02-18 13:37:03,603 INFO L413 NwaCegarLoop]: 757 mSDtfsCounter, 2908 mSDsluCounter, 1946 mSDsCounter, 0 mSdLazyCounter, 2165 mSolverCounterSat, 796 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2967 SdHoareTripleChecker+Valid, 2703 SdHoareTripleChecker+Invalid, 2962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 796 IncrementalHoareTripleChecker+Valid, 2165 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2023-02-18 13:37:03,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2967 Valid, 2703 Invalid, 2962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [796 Valid, 2165 Invalid, 1 Unknown, 0 Unchecked, 5.5s Time] [2023-02-18 13:37:03,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5437 states. [2023-02-18 13:37:03,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5437 to 4456. [2023-02-18 13:37:03,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4456 states, 3785 states have (on average 1.4544253632760897) internal successors, (5505), 3908 states have internal predecessors, (5505), 466 states have call successors, (466), 162 states have call predecessors, (466), 204 states have return successors, (652), 401 states have call predecessors, (652), 449 states have call successors, (652) [2023-02-18 13:37:03,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4456 states to 4456 states and 6623 transitions. [2023-02-18 13:37:03,930 INFO L78 Accepts]: Start accepts. Automaton has 4456 states and 6623 transitions. Word has length 69 [2023-02-18 13:37:03,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:37:03,931 INFO L495 AbstractCegarLoop]: Abstraction has 4456 states and 6623 transitions. [2023-02-18 13:37:03,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-18 13:37:03,931 INFO L276 IsEmpty]: Start isEmpty. Operand 4456 states and 6623 transitions. [2023-02-18 13:37:03,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-18 13:37:03,932 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:37:03,932 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:37:03,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-02-18 13:37:03,933 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:37:03,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:37:03,933 INFO L85 PathProgramCache]: Analyzing trace with hash -677342089, now seen corresponding path program 1 times [2023-02-18 13:37:03,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:37:03,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981438261] [2023-02-18 13:37:03,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:37:03,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:37:03,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:04,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:37:04,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:04,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:37:04,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:04,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-18 13:37:04,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:04,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-18 13:37:04,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:04,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:37:04,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:37:04,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981438261] [2023-02-18 13:37:04,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981438261] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:37:04,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:37:04,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-18 13:37:04,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958507287] [2023-02-18 13:37:04,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:37:04,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 13:37:04,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:37:04,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 13:37:04,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-02-18 13:37:04,111 INFO L87 Difference]: Start difference. First operand 4456 states and 6623 transitions. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 13:37:08,253 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:37:10,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:37:11,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:37:11,336 INFO L93 Difference]: Finished difference Result 7882 states and 11879 transitions. [2023-02-18 13:37:11,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-18 13:37:11,336 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 68 [2023-02-18 13:37:11,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:37:11,346 INFO L225 Difference]: With dead ends: 7882 [2023-02-18 13:37:11,346 INFO L226 Difference]: Without dead ends: 5395 [2023-02-18 13:37:11,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2023-02-18 13:37:11,351 INFO L413 NwaCegarLoop]: 529 mSDtfsCounter, 837 mSDsluCounter, 1604 mSDsCounter, 0 mSdLazyCounter, 1694 mSolverCounterSat, 140 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 860 SdHoareTripleChecker+Valid, 2133 SdHoareTripleChecker+Invalid, 1836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1694 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2023-02-18 13:37:11,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [860 Valid, 2133 Invalid, 1836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1694 Invalid, 2 Unknown, 0 Unchecked, 6.7s Time] [2023-02-18 13:37:11,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5395 states. [2023-02-18 13:37:11,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5395 to 4432. [2023-02-18 13:37:11,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4432 states, 3761 states have (on average 1.4557298590800318) internal successors, (5475), 3884 states have internal predecessors, (5475), 466 states have call successors, (466), 162 states have call predecessors, (466), 204 states have return successors, (652), 401 states have call predecessors, (652), 449 states have call successors, (652) [2023-02-18 13:37:11,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4432 states to 4432 states and 6593 transitions. [2023-02-18 13:37:11,734 INFO L78 Accepts]: Start accepts. Automaton has 4432 states and 6593 transitions. Word has length 68 [2023-02-18 13:37:11,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:37:11,734 INFO L495 AbstractCegarLoop]: Abstraction has 4432 states and 6593 transitions. [2023-02-18 13:37:11,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 13:37:11,734 INFO L276 IsEmpty]: Start isEmpty. Operand 4432 states and 6593 transitions. [2023-02-18 13:37:11,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-18 13:37:11,736 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:37:11,736 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:37:11,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-02-18 13:37:11,736 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:37:11,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:37:11,736 INFO L85 PathProgramCache]: Analyzing trace with hash -554272668, now seen corresponding path program 1 times [2023-02-18 13:37:11,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:37:11,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355858638] [2023-02-18 13:37:11,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:37:11,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:37:11,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:11,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:37:11,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:11,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:37:11,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:11,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-18 13:37:11,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:11,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-02-18 13:37:11,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:11,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-02-18 13:37:11,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:11,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2023-02-18 13:37:11,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:11,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:37:11,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:37:11,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355858638] [2023-02-18 13:37:11,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355858638] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:37:11,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:37:11,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-18 13:37:11,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614413953] [2023-02-18 13:37:11,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:37:11,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 13:37:11,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:37:11,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 13:37:11,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-18 13:37:11,894 INFO L87 Difference]: Start difference. First operand 4432 states and 6593 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-18 13:37:15,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:37:16,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:37:16,344 INFO L93 Difference]: Finished difference Result 7928 states and 11993 transitions. [2023-02-18 13:37:16,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-18 13:37:16,345 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 71 [2023-02-18 13:37:16,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:37:16,357 INFO L225 Difference]: With dead ends: 7928 [2023-02-18 13:37:16,357 INFO L226 Difference]: Without dead ends: 5377 [2023-02-18 13:37:16,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2023-02-18 13:37:16,363 INFO L413 NwaCegarLoop]: 507 mSDtfsCounter, 1469 mSDsluCounter, 1585 mSDsCounter, 0 mSdLazyCounter, 1394 mSolverCounterSat, 539 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1479 SdHoareTripleChecker+Valid, 2092 SdHoareTripleChecker+Invalid, 1934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 539 IncrementalHoareTripleChecker+Valid, 1394 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-02-18 13:37:16,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1479 Valid, 2092 Invalid, 1934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [539 Valid, 1394 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2023-02-18 13:37:16,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5377 states. [2023-02-18 13:37:16,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5377 to 4423. [2023-02-18 13:37:16,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4423 states, 3755 states have (on average 1.4561917443408787) internal successors, (5468), 3877 states have internal predecessors, (5468), 464 states have call successors, (464), 161 states have call predecessors, (464), 203 states have return successors, (638), 399 states have call predecessors, (638), 447 states have call successors, (638) [2023-02-18 13:37:16,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4423 states to 4423 states and 6570 transitions. [2023-02-18 13:37:16,683 INFO L78 Accepts]: Start accepts. Automaton has 4423 states and 6570 transitions. Word has length 71 [2023-02-18 13:37:16,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:37:16,683 INFO L495 AbstractCegarLoop]: Abstraction has 4423 states and 6570 transitions. [2023-02-18 13:37:16,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-18 13:37:16,683 INFO L276 IsEmpty]: Start isEmpty. Operand 4423 states and 6570 transitions. [2023-02-18 13:37:16,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-18 13:37:16,684 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:37:16,685 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:37:16,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-02-18 13:37:16,685 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:37:16,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:37:16,685 INFO L85 PathProgramCache]: Analyzing trace with hash 827121083, now seen corresponding path program 1 times [2023-02-18 13:37:16,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:37:16,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598227493] [2023-02-18 13:37:16,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:37:16,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:37:16,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:16,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:37:16,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:16,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:37:16,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:16,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-02-18 13:37:16,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:16,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-18 13:37:16,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:16,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:37:16,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:37:16,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598227493] [2023-02-18 13:37:16,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598227493] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:37:16,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:37:16,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-18 13:37:16,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419183053] [2023-02-18 13:37:16,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:37:16,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 13:37:16,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:37:16,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 13:37:16,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-18 13:37:16,930 INFO L87 Difference]: Start difference. First operand 4423 states and 6570 transitions. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 13:37:20,694 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:37:21,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:37:21,777 INFO L93 Difference]: Finished difference Result 5314 states and 8061 transitions. [2023-02-18 13:37:21,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-18 13:37:21,778 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 68 [2023-02-18 13:37:21,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:37:21,788 INFO L225 Difference]: With dead ends: 5314 [2023-02-18 13:37:21,788 INFO L226 Difference]: Without dead ends: 5292 [2023-02-18 13:37:21,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-02-18 13:37:21,790 INFO L413 NwaCegarLoop]: 534 mSDtfsCounter, 1118 mSDsluCounter, 2209 mSDsCounter, 0 mSdLazyCounter, 1812 mSolverCounterSat, 430 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1174 SdHoareTripleChecker+Valid, 2743 SdHoareTripleChecker+Invalid, 2243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 430 IncrementalHoareTripleChecker+Valid, 1812 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-02-18 13:37:21,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1174 Valid, 2743 Invalid, 2243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [430 Valid, 1812 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2023-02-18 13:37:21,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5292 states. [2023-02-18 13:37:22,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5292 to 4430. [2023-02-18 13:37:22,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4430 states, 3759 states have (on average 1.4554402766693268) internal successors, (5471), 3882 states have internal predecessors, (5471), 467 states have call successors, (467), 161 states have call predecessors, (467), 203 states have return successors, (647), 401 states have call predecessors, (647), 448 states have call successors, (647) [2023-02-18 13:37:22,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4430 states to 4430 states and 6585 transitions. [2023-02-18 13:37:22,126 INFO L78 Accepts]: Start accepts. Automaton has 4430 states and 6585 transitions. Word has length 68 [2023-02-18 13:37:22,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:37:22,126 INFO L495 AbstractCegarLoop]: Abstraction has 4430 states and 6585 transitions. [2023-02-18 13:37:22,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 13:37:22,126 INFO L276 IsEmpty]: Start isEmpty. Operand 4430 states and 6585 transitions. [2023-02-18 13:37:22,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-02-18 13:37:22,127 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:37:22,128 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:37:22,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-02-18 13:37:22,128 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:37:22,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:37:22,128 INFO L85 PathProgramCache]: Analyzing trace with hash 463590116, now seen corresponding path program 1 times [2023-02-18 13:37:22,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:37:22,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126925683] [2023-02-18 13:37:22,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:37:22,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:37:22,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:22,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:37:22,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:22,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:37:22,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:22,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-18 13:37:22,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:22,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-18 13:37:22,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:22,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:37:22,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:37:22,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126925683] [2023-02-18 13:37:22,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126925683] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:37:22,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:37:22,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-18 13:37:22,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517326898] [2023-02-18 13:37:22,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:37:22,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 13:37:22,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:37:22,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 13:37:22,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-02-18 13:37:22,453 INFO L87 Difference]: Start difference. First operand 4430 states and 6585 transitions. Second operand has 10 states, 10 states have (on average 6.0) internal successors, (60), 5 states have internal predecessors, (60), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 13:37:26,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:37:27,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:37:27,970 INFO L93 Difference]: Finished difference Result 5370 states and 8183 transitions. [2023-02-18 13:37:27,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-18 13:37:27,971 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 5 states have internal predecessors, (60), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 69 [2023-02-18 13:37:27,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:37:27,980 INFO L225 Difference]: With dead ends: 5370 [2023-02-18 13:37:27,980 INFO L226 Difference]: Without dead ends: 5354 [2023-02-18 13:37:27,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2023-02-18 13:37:27,982 INFO L413 NwaCegarLoop]: 525 mSDtfsCounter, 894 mSDsluCounter, 2824 mSDsCounter, 0 mSdLazyCounter, 2321 mSolverCounterSat, 245 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 917 SdHoareTripleChecker+Valid, 3349 SdHoareTripleChecker+Invalid, 2567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 2321 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-02-18 13:37:27,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [917 Valid, 3349 Invalid, 2567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 2321 Invalid, 1 Unknown, 0 Unchecked, 5.0s Time] [2023-02-18 13:37:27,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5354 states. [2023-02-18 13:37:28,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5354 to 4435. [2023-02-18 13:37:28,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4435 states, 3762 states have (on average 1.4556087187666136) internal successors, (5476), 3886 states have internal predecessors, (5476), 469 states have call successors, (469), 161 states have call predecessors, (469), 203 states have return successors, (649), 402 states have call predecessors, (649), 450 states have call successors, (649) [2023-02-18 13:37:28,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4435 states to 4435 states and 6594 transitions. [2023-02-18 13:37:28,359 INFO L78 Accepts]: Start accepts. Automaton has 4435 states and 6594 transitions. Word has length 69 [2023-02-18 13:37:28,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:37:28,359 INFO L495 AbstractCegarLoop]: Abstraction has 4435 states and 6594 transitions. [2023-02-18 13:37:28,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 5 states have internal predecessors, (60), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 13:37:28,359 INFO L276 IsEmpty]: Start isEmpty. Operand 4435 states and 6594 transitions. [2023-02-18 13:37:28,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-02-18 13:37:28,360 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:37:28,361 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:37:28,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-02-18 13:37:28,361 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:37:28,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:37:28,361 INFO L85 PathProgramCache]: Analyzing trace with hash -669900528, now seen corresponding path program 1 times [2023-02-18 13:37:28,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:37:28,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020903142] [2023-02-18 13:37:28,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:37:28,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:37:28,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:28,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:37:28,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:28,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:37:28,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:28,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-18 13:37:28,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:28,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-02-18 13:37:28,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:28,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:37:28,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:37:28,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020903142] [2023-02-18 13:37:28,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020903142] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:37:28,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:37:28,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-18 13:37:28,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906257652] [2023-02-18 13:37:28,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:37:28,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 13:37:28,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:37:28,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 13:37:28,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-02-18 13:37:28,652 INFO L87 Difference]: Start difference. First operand 4435 states and 6594 transitions. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-18 13:37:32,636 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:37:34,643 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:37:35,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:37:35,663 INFO L93 Difference]: Finished difference Result 9537 states and 14519 transitions. [2023-02-18 13:37:35,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 13:37:35,663 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 69 [2023-02-18 13:37:35,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:37:35,673 INFO L225 Difference]: With dead ends: 9537 [2023-02-18 13:37:35,673 INFO L226 Difference]: Without dead ends: 5481 [2023-02-18 13:37:35,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-02-18 13:37:35,682 INFO L413 NwaCegarLoop]: 569 mSDtfsCounter, 405 mSDsluCounter, 1961 mSDsCounter, 0 mSdLazyCounter, 1454 mSolverCounterSat, 93 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 2530 SdHoareTripleChecker+Invalid, 1549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1454 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2023-02-18 13:37:35,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 2530 Invalid, 1549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1454 Invalid, 2 Unknown, 0 Unchecked, 6.5s Time] [2023-02-18 13:37:35,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5481 states. [2023-02-18 13:37:36,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5481 to 4463. [2023-02-18 13:37:36,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4463 states, 3790 states have (on average 1.4522427440633245) internal successors, (5504), 3914 states have internal predecessors, (5504), 469 states have call successors, (469), 161 states have call predecessors, (469), 203 states have return successors, (649), 402 states have call predecessors, (649), 450 states have call successors, (649) [2023-02-18 13:37:36,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4463 states to 4463 states and 6622 transitions. [2023-02-18 13:37:36,119 INFO L78 Accepts]: Start accepts. Automaton has 4463 states and 6622 transitions. Word has length 69 [2023-02-18 13:37:36,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:37:36,119 INFO L495 AbstractCegarLoop]: Abstraction has 4463 states and 6622 transitions. [2023-02-18 13:37:36,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-18 13:37:36,120 INFO L276 IsEmpty]: Start isEmpty. Operand 4463 states and 6622 transitions. [2023-02-18 13:37:36,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-02-18 13:37:36,121 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:37:36,121 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:37:36,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-02-18 13:37:36,121 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:37:36,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:37:36,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1685614928, now seen corresponding path program 1 times [2023-02-18 13:37:36,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:37:36,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381677186] [2023-02-18 13:37:36,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:37:36,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:37:36,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:36,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:37:36,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:36,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:37:36,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:36,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-18 13:37:36,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:36,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-02-18 13:37:36,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:36,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:37:36,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:37:36,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381677186] [2023-02-18 13:37:36,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381677186] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:37:36,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:37:36,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-18 13:37:36,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430706388] [2023-02-18 13:37:36,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:37:36,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 13:37:36,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:37:36,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 13:37:36,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-18 13:37:36,440 INFO L87 Difference]: Start difference. First operand 4463 states and 6622 transitions. Second operand has 10 states, 10 states have (on average 6.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-18 13:37:40,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:37:41,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:37:41,107 INFO L93 Difference]: Finished difference Result 9457 states and 14325 transitions. [2023-02-18 13:37:41,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-18 13:37:41,108 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 69 [2023-02-18 13:37:41,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:37:41,118 INFO L225 Difference]: With dead ends: 9457 [2023-02-18 13:37:41,118 INFO L226 Difference]: Without dead ends: 5392 [2023-02-18 13:37:41,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-02-18 13:37:41,126 INFO L413 NwaCegarLoop]: 551 mSDtfsCounter, 486 mSDsluCounter, 2637 mSDsCounter, 0 mSdLazyCounter, 1740 mSolverCounterSat, 281 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 3188 SdHoareTripleChecker+Invalid, 2022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 281 IncrementalHoareTripleChecker+Valid, 1740 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-02-18 13:37:41,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [500 Valid, 3188 Invalid, 2022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [281 Valid, 1740 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2023-02-18 13:37:41,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5392 states. [2023-02-18 13:37:41,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5392 to 4442. [2023-02-18 13:37:41,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4442 states, 3776 states have (on average 1.4539194915254237) internal successors, (5490), 3900 states have internal predecessors, (5490), 469 states have call successors, (469), 161 states have call predecessors, (469), 196 states have return successors, (604), 395 states have call predecessors, (604), 450 states have call successors, (604) [2023-02-18 13:37:41,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4442 states to 4442 states and 6563 transitions. [2023-02-18 13:37:41,555 INFO L78 Accepts]: Start accepts. Automaton has 4442 states and 6563 transitions. Word has length 69 [2023-02-18 13:37:41,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:37:41,556 INFO L495 AbstractCegarLoop]: Abstraction has 4442 states and 6563 transitions. [2023-02-18 13:37:41,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-18 13:37:41,556 INFO L276 IsEmpty]: Start isEmpty. Operand 4442 states and 6563 transitions. [2023-02-18 13:37:41,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-18 13:37:41,557 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:37:41,557 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:37:41,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-02-18 13:37:41,558 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:37:41,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:37:41,558 INFO L85 PathProgramCache]: Analyzing trace with hash 277949588, now seen corresponding path program 1 times [2023-02-18 13:37:41,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:37:41,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489277119] [2023-02-18 13:37:41,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:37:41,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:37:41,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:41,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:37:41,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:41,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:37:41,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:41,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-18 13:37:41,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:41,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-02-18 13:37:41,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:41,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-18 13:37:41,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:41,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:37:41,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:37:41,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489277119] [2023-02-18 13:37:41,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489277119] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:37:41,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:37:41,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-18 13:37:41,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370592741] [2023-02-18 13:37:41,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:37:41,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 13:37:41,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:37:41,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 13:37:41,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-02-18 13:37:41,801 INFO L87 Difference]: Start difference. First operand 4442 states and 6563 transitions. Second operand has 10 states, 10 states have (on average 6.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-18 13:37:47,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:37:49,338 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:37:50,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:37:50,853 INFO L93 Difference]: Finished difference Result 8071 states and 12226 transitions. [2023-02-18 13:37:50,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-18 13:37:50,854 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 71 [2023-02-18 13:37:50,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:37:50,862 INFO L225 Difference]: With dead ends: 8071 [2023-02-18 13:37:50,863 INFO L226 Difference]: Without dead ends: 5587 [2023-02-18 13:37:50,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2023-02-18 13:37:50,867 INFO L413 NwaCegarLoop]: 526 mSDtfsCounter, 807 mSDsluCounter, 2796 mSDsCounter, 0 mSdLazyCounter, 2721 mSolverCounterSat, 153 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 830 SdHoareTripleChecker+Valid, 3322 SdHoareTripleChecker+Invalid, 2876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 2721 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2023-02-18 13:37:50,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [830 Valid, 3322 Invalid, 2876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 2721 Invalid, 2 Unknown, 0 Unchecked, 8.4s Time] [2023-02-18 13:37:50,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5587 states. [2023-02-18 13:37:51,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5587 to 4500. [2023-02-18 13:37:51,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4500 states, 3820 states have (on average 1.4486910994764397) internal successors, (5534), 3946 states have internal predecessors, (5534), 469 states have call successors, (469), 161 states have call predecessors, (469), 210 states have return successors, (649), 407 states have call predecessors, (649), 450 states have call successors, (649) [2023-02-18 13:37:51,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4500 states to 4500 states and 6652 transitions. [2023-02-18 13:37:51,224 INFO L78 Accepts]: Start accepts. Automaton has 4500 states and 6652 transitions. Word has length 71 [2023-02-18 13:37:51,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:37:51,225 INFO L495 AbstractCegarLoop]: Abstraction has 4500 states and 6652 transitions. [2023-02-18 13:37:51,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-18 13:37:51,225 INFO L276 IsEmpty]: Start isEmpty. Operand 4500 states and 6652 transitions. [2023-02-18 13:37:51,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-02-18 13:37:51,229 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:37:51,230 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:37:51,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-02-18 13:37:51,230 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:37:51,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:37:51,230 INFO L85 PathProgramCache]: Analyzing trace with hash 302497870, now seen corresponding path program 1 times [2023-02-18 13:37:51,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:37:51,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626477778] [2023-02-18 13:37:51,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:37:51,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:37:51,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:51,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:37:51,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:51,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:37:51,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:51,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-18 13:37:51,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:51,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-18 13:37:51,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:51,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:37:51,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:37:51,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626477778] [2023-02-18 13:37:51,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626477778] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:37:51,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:37:51,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-18 13:37:51,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597792143] [2023-02-18 13:37:51,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:37:51,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 13:37:51,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:37:51,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 13:37:51,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-02-18 13:37:51,492 INFO L87 Difference]: Start difference. First operand 4500 states and 6652 transitions. Second operand has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-18 13:37:55,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:37:57,374 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:37:58,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:37:58,455 INFO L93 Difference]: Finished difference Result 9710 states and 14667 transitions. [2023-02-18 13:37:58,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-18 13:37:58,455 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 70 [2023-02-18 13:37:58,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:37:58,465 INFO L225 Difference]: With dead ends: 9710 [2023-02-18 13:37:58,465 INFO L226 Difference]: Without dead ends: 5608 [2023-02-18 13:37:58,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2023-02-18 13:37:58,474 INFO L413 NwaCegarLoop]: 547 mSDtfsCounter, 413 mSDsluCounter, 2333 mSDsCounter, 0 mSdLazyCounter, 1797 mSolverCounterSat, 124 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 2880 SdHoareTripleChecker+Invalid, 1923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1797 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2023-02-18 13:37:58,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [427 Valid, 2880 Invalid, 1923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1797 Invalid, 2 Unknown, 0 Unchecked, 6.3s Time] [2023-02-18 13:37:58,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5608 states. [2023-02-18 13:37:58,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5608 to 4512. [2023-02-18 13:37:58,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4512 states, 3832 states have (on average 1.447286012526096) internal successors, (5546), 3946 states have internal predecessors, (5546), 469 states have call successors, (469), 161 states have call predecessors, (469), 210 states have return successors, (649), 419 states have call predecessors, (649), 450 states have call successors, (649) [2023-02-18 13:37:58,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4512 states to 4512 states and 6664 transitions. [2023-02-18 13:37:58,837 INFO L78 Accepts]: Start accepts. Automaton has 4512 states and 6664 transitions. Word has length 70 [2023-02-18 13:37:58,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:37:58,838 INFO L495 AbstractCegarLoop]: Abstraction has 4512 states and 6664 transitions. [2023-02-18 13:37:58,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-18 13:37:58,838 INFO L276 IsEmpty]: Start isEmpty. Operand 4512 states and 6664 transitions. [2023-02-18 13:37:58,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-02-18 13:37:58,840 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:37:58,840 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:37:58,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-02-18 13:37:58,840 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:37:58,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:37:58,841 INFO L85 PathProgramCache]: Analyzing trace with hash 965591191, now seen corresponding path program 1 times [2023-02-18 13:37:58,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:37:58,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29457032] [2023-02-18 13:37:58,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:37:58,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:37:58,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:59,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:37:59,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:59,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:37:59,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:59,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-18 13:37:59,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:37:59,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:37:59,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:37:59,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29457032] [2023-02-18 13:37:59,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29457032] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:37:59,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:37:59,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-02-18 13:37:59,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115941564] [2023-02-18 13:37:59,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:37:59,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-18 13:37:59,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:37:59,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-18 13:37:59,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2023-02-18 13:37:59,101 INFO L87 Difference]: Start difference. First operand 4512 states and 6664 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 7 states have internal predecessors, (62), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-18 13:38:04,052 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:38:05,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:38:05,326 INFO L93 Difference]: Finished difference Result 5392 states and 8127 transitions. [2023-02-18 13:38:05,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-18 13:38:05,326 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 7 states have internal predecessors, (62), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 69 [2023-02-18 13:38:05,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:38:05,336 INFO L225 Difference]: With dead ends: 5392 [2023-02-18 13:38:05,336 INFO L226 Difference]: Without dead ends: 5370 [2023-02-18 13:38:05,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2023-02-18 13:38:05,338 INFO L413 NwaCegarLoop]: 527 mSDtfsCounter, 911 mSDsluCounter, 3519 mSDsCounter, 0 mSdLazyCounter, 2954 mSolverCounterSat, 324 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 935 SdHoareTripleChecker+Valid, 4046 SdHoareTripleChecker+Invalid, 3279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 2954 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2023-02-18 13:38:05,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [935 Valid, 4046 Invalid, 3279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 2954 Invalid, 1 Unknown, 0 Unchecked, 5.6s Time] [2023-02-18 13:38:05,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5370 states. [2023-02-18 13:38:05,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5370 to 4507. [2023-02-18 13:38:05,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4507 states, 3828 states have (on average 1.4474921630094044) internal successors, (5541), 3942 states have internal predecessors, (5541), 468 states have call successors, (468), 161 states have call predecessors, (468), 210 states have return successors, (648), 418 states have call predecessors, (648), 449 states have call successors, (648) [2023-02-18 13:38:05,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4507 states to 4507 states and 6657 transitions. [2023-02-18 13:38:05,706 INFO L78 Accepts]: Start accepts. Automaton has 4507 states and 6657 transitions. Word has length 69 [2023-02-18 13:38:05,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:38:05,706 INFO L495 AbstractCegarLoop]: Abstraction has 4507 states and 6657 transitions. [2023-02-18 13:38:05,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 7 states have internal predecessors, (62), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-18 13:38:05,706 INFO L276 IsEmpty]: Start isEmpty. Operand 4507 states and 6657 transitions. [2023-02-18 13:38:05,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-18 13:38:05,708 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:38:05,708 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:38:05,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2023-02-18 13:38:05,716 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:38:05,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:38:05,716 INFO L85 PathProgramCache]: Analyzing trace with hash 2005419428, now seen corresponding path program 1 times [2023-02-18 13:38:05,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:38:05,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176699008] [2023-02-18 13:38:05,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:38:05,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:38:05,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:05,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:38:05,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:05,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:38:05,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:05,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-02-18 13:38:05,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:05,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-18 13:38:05,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:05,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-02-18 13:38:05,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:06,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:38:06,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:38:06,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176699008] [2023-02-18 13:38:06,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176699008] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:38:06,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:38:06,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-18 13:38:06,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15028337] [2023-02-18 13:38:06,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:38:06,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 13:38:06,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:38:06,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 13:38:06,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-02-18 13:38:06,009 INFO L87 Difference]: Start difference. First operand 4507 states and 6657 transitions. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-18 13:38:09,727 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:38:10,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:38:10,885 INFO L93 Difference]: Finished difference Result 9683 states and 14516 transitions. [2023-02-18 13:38:10,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-18 13:38:10,885 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 71 [2023-02-18 13:38:10,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:38:10,895 INFO L225 Difference]: With dead ends: 9683 [2023-02-18 13:38:10,895 INFO L226 Difference]: Without dead ends: 5583 [2023-02-18 13:38:10,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2023-02-18 13:38:10,903 INFO L413 NwaCegarLoop]: 518 mSDtfsCounter, 1114 mSDsluCounter, 1307 mSDsCounter, 0 mSdLazyCounter, 1170 mSolverCounterSat, 436 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1136 SdHoareTripleChecker+Valid, 1825 SdHoareTripleChecker+Invalid, 1607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 436 IncrementalHoareTripleChecker+Valid, 1170 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-02-18 13:38:10,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1136 Valid, 1825 Invalid, 1607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [436 Valid, 1170 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2023-02-18 13:38:10,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5583 states. [2023-02-18 13:38:11,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5583 to 4523. [2023-02-18 13:38:11,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4523 states, 3844 states have (on average 1.4456295525494276) internal successors, (5557), 3958 states have internal predecessors, (5557), 468 states have call successors, (468), 161 states have call predecessors, (468), 210 states have return successors, (648), 418 states have call predecessors, (648), 449 states have call successors, (648) [2023-02-18 13:38:11,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4523 states to 4523 states and 6673 transitions. [2023-02-18 13:38:11,368 INFO L78 Accepts]: Start accepts. Automaton has 4523 states and 6673 transitions. Word has length 71 [2023-02-18 13:38:11,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:38:11,368 INFO L495 AbstractCegarLoop]: Abstraction has 4523 states and 6673 transitions. [2023-02-18 13:38:11,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-18 13:38:11,368 INFO L276 IsEmpty]: Start isEmpty. Operand 4523 states and 6673 transitions. [2023-02-18 13:38:11,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-02-18 13:38:11,369 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:38:11,369 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:38:11,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2023-02-18 13:38:11,370 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:38:11,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:38:11,370 INFO L85 PathProgramCache]: Analyzing trace with hash 885604175, now seen corresponding path program 1 times [2023-02-18 13:38:11,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:38:11,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027158607] [2023-02-18 13:38:11,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:38:11,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:38:11,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:11,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:38:11,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:11,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:38:11,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:11,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-18 13:38:11,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:11,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:38:11,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:38:11,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027158607] [2023-02-18 13:38:11,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027158607] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:38:11,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:38:11,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-02-18 13:38:11,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451827689] [2023-02-18 13:38:11,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:38:11,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-18 13:38:11,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:38:11,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-18 13:38:11,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2023-02-18 13:38:11,623 INFO L87 Difference]: Start difference. First operand 4523 states and 6673 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 7 states have internal predecessors, (62), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-18 13:38:16,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:38:17,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:38:17,614 INFO L93 Difference]: Finished difference Result 5415 states and 8148 transitions. [2023-02-18 13:38:17,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-18 13:38:17,614 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 7 states have internal predecessors, (62), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 69 [2023-02-18 13:38:17,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:38:17,621 INFO L225 Difference]: With dead ends: 5415 [2023-02-18 13:38:17,621 INFO L226 Difference]: Without dead ends: 5394 [2023-02-18 13:38:17,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2023-02-18 13:38:17,623 INFO L413 NwaCegarLoop]: 520 mSDtfsCounter, 911 mSDsluCounter, 3472 mSDsCounter, 0 mSdLazyCounter, 2941 mSolverCounterSat, 321 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 935 SdHoareTripleChecker+Valid, 3992 SdHoareTripleChecker+Invalid, 3263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 2941 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2023-02-18 13:38:17,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [935 Valid, 3992 Invalid, 3263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 2941 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2023-02-18 13:38:17,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5394 states. [2023-02-18 13:38:17,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5394 to 4519. [2023-02-18 13:38:17,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4519 states, 3841 states have (on average 1.445717261129914) internal successors, (5553), 3955 states have internal predecessors, (5553), 467 states have call successors, (467), 161 states have call predecessors, (467), 210 states have return successors, (647), 417 states have call predecessors, (647), 448 states have call successors, (647) [2023-02-18 13:38:17,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4519 states to 4519 states and 6667 transitions. [2023-02-18 13:38:17,998 INFO L78 Accepts]: Start accepts. Automaton has 4519 states and 6667 transitions. Word has length 69 [2023-02-18 13:38:17,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:38:17,998 INFO L495 AbstractCegarLoop]: Abstraction has 4519 states and 6667 transitions. [2023-02-18 13:38:17,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 7 states have internal predecessors, (62), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-18 13:38:17,998 INFO L276 IsEmpty]: Start isEmpty. Operand 4519 states and 6667 transitions. [2023-02-18 13:38:17,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-18 13:38:17,999 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:38:18,000 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:38:18,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2023-02-18 13:38:18,000 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:38:18,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:38:18,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1081372361, now seen corresponding path program 1 times [2023-02-18 13:38:18,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:38:18,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217177457] [2023-02-18 13:38:18,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:38:18,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:38:18,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:18,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:38:18,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:18,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:38:18,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:18,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-18 13:38:18,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:18,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-18 13:38:18,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:18,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:38:18,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:38:18,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217177457] [2023-02-18 13:38:18,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217177457] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:38:18,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:38:18,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-18 13:38:18,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963689259] [2023-02-18 13:38:18,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:38:18,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 13:38:18,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:38:18,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 13:38:18,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-02-18 13:38:18,167 INFO L87 Difference]: Start difference. First operand 4519 states and 6667 transitions. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 13:38:21,425 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:38:22,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:38:22,550 INFO L93 Difference]: Finished difference Result 8186 states and 12263 transitions. [2023-02-18 13:38:22,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-18 13:38:22,551 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 71 [2023-02-18 13:38:22,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:38:22,560 INFO L225 Difference]: With dead ends: 8186 [2023-02-18 13:38:22,560 INFO L226 Difference]: Without dead ends: 5655 [2023-02-18 13:38:22,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2023-02-18 13:38:22,565 INFO L413 NwaCegarLoop]: 502 mSDtfsCounter, 1010 mSDsluCounter, 1300 mSDsCounter, 0 mSdLazyCounter, 1236 mSolverCounterSat, 427 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1033 SdHoareTripleChecker+Valid, 1802 SdHoareTripleChecker+Invalid, 1664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 427 IncrementalHoareTripleChecker+Valid, 1236 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-02-18 13:38:22,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1033 Valid, 1802 Invalid, 1664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [427 Valid, 1236 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2023-02-18 13:38:22,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5655 states. [2023-02-18 13:38:22,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5655 to 4579. [2023-02-18 13:38:22,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4579 states, 3901 states have (on average 1.4388618302999232) internal successors, (5613), 4015 states have internal predecessors, (5613), 467 states have call successors, (467), 161 states have call predecessors, (467), 210 states have return successors, (647), 417 states have call predecessors, (647), 448 states have call successors, (647) [2023-02-18 13:38:22,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4579 states to 4579 states and 6727 transitions. [2023-02-18 13:38:22,964 INFO L78 Accepts]: Start accepts. Automaton has 4579 states and 6727 transitions. Word has length 71 [2023-02-18 13:38:22,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:38:22,964 INFO L495 AbstractCegarLoop]: Abstraction has 4579 states and 6727 transitions. [2023-02-18 13:38:22,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 13:38:22,966 INFO L276 IsEmpty]: Start isEmpty. Operand 4579 states and 6727 transitions. [2023-02-18 13:38:22,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-02-18 13:38:22,967 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:38:22,967 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:38:22,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2023-02-18 13:38:22,968 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:38:22,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:38:22,968 INFO L85 PathProgramCache]: Analyzing trace with hash -100745951, now seen corresponding path program 1 times [2023-02-18 13:38:22,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:38:22,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261329623] [2023-02-18 13:38:22,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:38:22,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:38:23,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:23,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:38:23,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:23,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:38:23,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:23,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-18 13:38:23,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:23,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:38:23,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:38:23,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261329623] [2023-02-18 13:38:23,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261329623] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:38:23,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:38:23,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-02-18 13:38:23,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343038623] [2023-02-18 13:38:23,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:38:23,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-18 13:38:23,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:38:23,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-18 13:38:23,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2023-02-18 13:38:23,248 INFO L87 Difference]: Start difference. First operand 4579 states and 6727 transitions. Second operand has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 7 states have internal predecessors, (63), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-18 13:38:27,536 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:38:28,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:38:28,853 INFO L93 Difference]: Finished difference Result 5471 states and 8202 transitions. [2023-02-18 13:38:28,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-18 13:38:28,854 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 7 states have internal predecessors, (63), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 70 [2023-02-18 13:38:28,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:38:28,863 INFO L225 Difference]: With dead ends: 5471 [2023-02-18 13:38:28,863 INFO L226 Difference]: Without dead ends: 5450 [2023-02-18 13:38:28,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2023-02-18 13:38:28,865 INFO L413 NwaCegarLoop]: 515 mSDtfsCounter, 910 mSDsluCounter, 3440 mSDsCounter, 0 mSdLazyCounter, 2930 mSolverCounterSat, 318 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 934 SdHoareTripleChecker+Valid, 3955 SdHoareTripleChecker+Invalid, 3249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 2930 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2023-02-18 13:38:28,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [934 Valid, 3955 Invalid, 3249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 2930 Invalid, 1 Unknown, 0 Unchecked, 4.9s Time] [2023-02-18 13:38:28,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5450 states. [2023-02-18 13:38:29,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5450 to 4575. [2023-02-18 13:38:29,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4575 states, 3898 states have (on average 1.438943047716778) internal successors, (5609), 4012 states have internal predecessors, (5609), 466 states have call successors, (466), 161 states have call predecessors, (466), 210 states have return successors, (646), 416 states have call predecessors, (646), 447 states have call successors, (646) [2023-02-18 13:38:29,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4575 states to 4575 states and 6721 transitions. [2023-02-18 13:38:29,268 INFO L78 Accepts]: Start accepts. Automaton has 4575 states and 6721 transitions. Word has length 70 [2023-02-18 13:38:29,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:38:29,268 INFO L495 AbstractCegarLoop]: Abstraction has 4575 states and 6721 transitions. [2023-02-18 13:38:29,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 7 states have internal predecessors, (63), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-18 13:38:29,269 INFO L276 IsEmpty]: Start isEmpty. Operand 4575 states and 6721 transitions. [2023-02-18 13:38:29,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-02-18 13:38:29,270 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:38:29,270 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:38:29,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2023-02-18 13:38:29,270 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:38:29,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:38:29,270 INFO L85 PathProgramCache]: Analyzing trace with hash 2023695595, now seen corresponding path program 1 times [2023-02-18 13:38:29,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:38:29,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245641497] [2023-02-18 13:38:29,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:38:29,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:38:29,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:29,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:38:29,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:29,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:38:29,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:29,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-02-18 13:38:29,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:29,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-18 13:38:29,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:29,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-02-18 13:38:29,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:29,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:38:29,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:38:29,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245641497] [2023-02-18 13:38:29,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245641497] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:38:29,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:38:29,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-18 13:38:29,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942692860] [2023-02-18 13:38:29,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:38:29,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 13:38:29,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:38:29,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 13:38:29,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-02-18 13:38:29,774 INFO L87 Difference]: Start difference. First operand 4575 states and 6721 transitions. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-18 13:38:34,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:38:34,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:38:34,850 INFO L93 Difference]: Finished difference Result 5030 states and 7326 transitions. [2023-02-18 13:38:34,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 13:38:34,851 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 72 [2023-02-18 13:38:34,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:38:34,853 INFO L225 Difference]: With dead ends: 5030 [2023-02-18 13:38:34,853 INFO L226 Difference]: Without dead ends: 770 [2023-02-18 13:38:34,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2023-02-18 13:38:34,859 INFO L413 NwaCegarLoop]: 412 mSDtfsCounter, 589 mSDsluCounter, 1633 mSDsCounter, 0 mSdLazyCounter, 1550 mSolverCounterSat, 82 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 2045 SdHoareTripleChecker+Invalid, 1633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1550 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2023-02-18 13:38:34,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [602 Valid, 2045 Invalid, 1633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1550 Invalid, 1 Unknown, 0 Unchecked, 4.9s Time] [2023-02-18 13:38:34,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2023-02-18 13:38:34,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 737. [2023-02-18 13:38:34,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 626 states have (on average 1.3035143769968052) internal successors, (816), 639 states have internal predecessors, (816), 69 states have call successors, (69), 35 states have call predecessors, (69), 41 states have return successors, (85), 65 states have call predecessors, (85), 61 states have call successors, (85) [2023-02-18 13:38:34,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 970 transitions. [2023-02-18 13:38:34,917 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 970 transitions. Word has length 72 [2023-02-18 13:38:34,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:38:34,917 INFO L495 AbstractCegarLoop]: Abstraction has 737 states and 970 transitions. [2023-02-18 13:38:34,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-18 13:38:34,917 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 970 transitions. [2023-02-18 13:38:34,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-02-18 13:38:34,918 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:38:34,918 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:38:34,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2023-02-18 13:38:34,919 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:38:34,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:38:34,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1623584585, now seen corresponding path program 1 times [2023-02-18 13:38:34,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:38:34,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679867705] [2023-02-18 13:38:34,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:38:34,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:38:34,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:35,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:38:35,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:35,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:38:35,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:35,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-18 13:38:35,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:35,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-18 13:38:35,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:35,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:38:35,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:35,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 13:38:35,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:35,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-02-18 13:38:35,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:35,274 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 13:38:35,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:38:35,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679867705] [2023-02-18 13:38:35,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679867705] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:38:35,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:38:35,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-02-18 13:38:35,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185102428] [2023-02-18 13:38:35,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:38:35,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-18 13:38:35,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:38:35,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-18 13:38:35,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-02-18 13:38:35,276 INFO L87 Difference]: Start difference. First operand 737 states and 970 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 6 states have internal predecessors, (58), 2 states have call successors, (8), 6 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2023-02-18 13:38:40,118 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:38:40,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:38:40,592 INFO L93 Difference]: Finished difference Result 781 states and 1029 transitions. [2023-02-18 13:38:40,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-18 13:38:40,592 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 6 states have internal predecessors, (58), 2 states have call successors, (8), 6 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) Word has length 75 [2023-02-18 13:38:40,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:38:40,594 INFO L225 Difference]: With dead ends: 781 [2023-02-18 13:38:40,594 INFO L226 Difference]: Without dead ends: 743 [2023-02-18 13:38:40,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2023-02-18 13:38:40,594 INFO L413 NwaCegarLoop]: 398 mSDtfsCounter, 499 mSDsluCounter, 3009 mSDsCounter, 0 mSdLazyCounter, 2422 mSolverCounterSat, 172 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 3407 SdHoareTripleChecker+Invalid, 2595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 2422 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2023-02-18 13:38:40,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [513 Valid, 3407 Invalid, 2595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 2422 Invalid, 1 Unknown, 0 Unchecked, 5.2s Time] [2023-02-18 13:38:40,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2023-02-18 13:38:40,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 717. [2023-02-18 13:38:40,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 612 states have (on average 1.3055555555555556) internal successors, (799), 625 states have internal predecessors, (799), 65 states have call successors, (65), 33 states have call predecessors, (65), 39 states have return successors, (81), 61 states have call predecessors, (81), 57 states have call successors, (81) [2023-02-18 13:38:40,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 945 transitions. [2023-02-18 13:38:40,651 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 945 transitions. Word has length 75 [2023-02-18 13:38:40,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:38:40,651 INFO L495 AbstractCegarLoop]: Abstraction has 717 states and 945 transitions. [2023-02-18 13:38:40,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 6 states have internal predecessors, (58), 2 states have call successors, (8), 6 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2023-02-18 13:38:40,652 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 945 transitions. [2023-02-18 13:38:40,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-02-18 13:38:40,652 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:38:40,653 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:38:40,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2023-02-18 13:38:40,653 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:38:40,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:38:40,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1736062830, now seen corresponding path program 1 times [2023-02-18 13:38:40,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:38:40,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851580941] [2023-02-18 13:38:40,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:38:40,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:38:40,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:40,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:38:40,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:40,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:38:40,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:40,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-18 13:38:40,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:40,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:38:40,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:40,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-02-18 13:38:40,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:40,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-18 13:38:40,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:40,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:38:40,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:38:40,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851580941] [2023-02-18 13:38:40,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851580941] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:38:40,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:38:40,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-18 13:38:40,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721988672] [2023-02-18 13:38:40,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:38:40,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 13:38:40,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:38:40,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 13:38:40,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-02-18 13:38:40,910 INFO L87 Difference]: Start difference. First operand 717 states and 945 transitions. Second operand has 10 states, 10 states have (on average 6.2) internal successors, (62), 5 states have internal predecessors, (62), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-18 13:38:44,681 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:38:44,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:38:44,996 INFO L93 Difference]: Finished difference Result 763 states and 1007 transitions. [2023-02-18 13:38:44,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-18 13:38:44,997 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 5 states have internal predecessors, (62), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 75 [2023-02-18 13:38:44,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:38:44,998 INFO L225 Difference]: With dead ends: 763 [2023-02-18 13:38:44,998 INFO L226 Difference]: Without dead ends: 717 [2023-02-18 13:38:44,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2023-02-18 13:38:44,999 INFO L413 NwaCegarLoop]: 400 mSDtfsCounter, 620 mSDsluCounter, 2140 mSDsCounter, 0 mSdLazyCounter, 1610 mSolverCounterSat, 170 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 2540 SdHoareTripleChecker+Invalid, 1781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 1610 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-02-18 13:38:44,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [633 Valid, 2540 Invalid, 1781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 1610 Invalid, 1 Unknown, 0 Unchecked, 4.0s Time] [2023-02-18 13:38:45,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2023-02-18 13:38:45,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 695. [2023-02-18 13:38:45,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 594 states have (on average 1.3080808080808082) internal successors, (777), 607 states have internal predecessors, (777), 61 states have call successors, (61), 33 states have call predecessors, (61), 39 states have return successors, (77), 57 states have call predecessors, (77), 53 states have call successors, (77) [2023-02-18 13:38:45,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 915 transitions. [2023-02-18 13:38:45,053 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 915 transitions. Word has length 75 [2023-02-18 13:38:45,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:38:45,053 INFO L495 AbstractCegarLoop]: Abstraction has 695 states and 915 transitions. [2023-02-18 13:38:45,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 5 states have internal predecessors, (62), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-18 13:38:45,054 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 915 transitions. [2023-02-18 13:38:45,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-02-18 13:38:45,054 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:38:45,054 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:38:45,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2023-02-18 13:38:45,055 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:38:45,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:38:45,055 INFO L85 PathProgramCache]: Analyzing trace with hash -496016635, now seen corresponding path program 1 times [2023-02-18 13:38:45,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:38:45,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50607957] [2023-02-18 13:38:45,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:38:45,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:38:45,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:45,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:38:45,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:45,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:38:45,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:45,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-18 13:38:45,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:45,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-02-18 13:38:45,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:45,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-02-18 13:38:45,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:45,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:38:45,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:45,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:38:45,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:38:45,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50607957] [2023-02-18 13:38:45,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50607957] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:38:45,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:38:45,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-18 13:38:45,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741437411] [2023-02-18 13:38:45,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:38:45,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 13:38:45,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:38:45,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 13:38:45,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-02-18 13:38:45,329 INFO L87 Difference]: Start difference. First operand 695 states and 915 transitions. Second operand has 10 states, 10 states have (on average 6.2) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-18 13:38:48,454 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:38:48,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:38:48,723 INFO L93 Difference]: Finished difference Result 1100 states and 1477 transitions. [2023-02-18 13:38:48,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-18 13:38:48,724 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 76 [2023-02-18 13:38:48,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:38:48,727 INFO L225 Difference]: With dead ends: 1100 [2023-02-18 13:38:48,727 INFO L226 Difference]: Without dead ends: 750 [2023-02-18 13:38:48,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2023-02-18 13:38:48,728 INFO L413 NwaCegarLoop]: 368 mSDtfsCounter, 844 mSDsluCounter, 1993 mSDsCounter, 0 mSdLazyCounter, 1383 mSolverCounterSat, 224 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 2361 SdHoareTripleChecker+Invalid, 1608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 1383 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-02-18 13:38:48,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [852 Valid, 2361 Invalid, 1608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 1383 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2023-02-18 13:38:48,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2023-02-18 13:38:48,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 711. [2023-02-18 13:38:48,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 608 states have (on average 1.305921052631579) internal successors, (794), 621 states have internal predecessors, (794), 61 states have call successors, (61), 33 states have call predecessors, (61), 41 states have return successors, (85), 59 states have call predecessors, (85), 53 states have call successors, (85) [2023-02-18 13:38:48,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 940 transitions. [2023-02-18 13:38:48,784 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 940 transitions. Word has length 76 [2023-02-18 13:38:48,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:38:48,785 INFO L495 AbstractCegarLoop]: Abstraction has 711 states and 940 transitions. [2023-02-18 13:38:48,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-18 13:38:48,785 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 940 transitions. [2023-02-18 13:38:48,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-02-18 13:38:48,786 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:38:48,786 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:38:48,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2023-02-18 13:38:48,789 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:38:48,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:38:48,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1257721170, now seen corresponding path program 1 times [2023-02-18 13:38:48,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:38:48,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193788237] [2023-02-18 13:38:48,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:38:48,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:38:48,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:48,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:38:48,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:48,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:38:48,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:48,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-18 13:38:48,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:48,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-18 13:38:48,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:48,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:38:48,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:38:48,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193788237] [2023-02-18 13:38:48,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193788237] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:38:48,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:38:48,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-18 13:38:48,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630291747] [2023-02-18 13:38:48,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:38:48,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 13:38:48,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:38:48,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 13:38:48,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-02-18 13:38:48,980 INFO L87 Difference]: Start difference. First operand 711 states and 940 transitions. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 13:38:51,872 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:38:52,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:38:52,133 INFO L93 Difference]: Finished difference Result 780 states and 1030 transitions. [2023-02-18 13:38:52,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 13:38:52,134 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 74 [2023-02-18 13:38:52,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:38:52,135 INFO L225 Difference]: With dead ends: 780 [2023-02-18 13:38:52,135 INFO L226 Difference]: Without dead ends: 755 [2023-02-18 13:38:52,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2023-02-18 13:38:52,136 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 592 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 174 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 1283 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-02-18 13:38:52,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [597 Valid, 1283 Invalid, 1013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 838 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2023-02-18 13:38:52,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2023-02-18 13:38:52,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 711. [2023-02-18 13:38:52,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 608 states have (on average 1.3108552631578947) internal successors, (797), 621 states have internal predecessors, (797), 61 states have call successors, (61), 33 states have call predecessors, (61), 41 states have return successors, (85), 59 states have call predecessors, (85), 53 states have call successors, (85) [2023-02-18 13:38:52,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 943 transitions. [2023-02-18 13:38:52,194 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 943 transitions. Word has length 74 [2023-02-18 13:38:52,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:38:52,194 INFO L495 AbstractCegarLoop]: Abstraction has 711 states and 943 transitions. [2023-02-18 13:38:52,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 13:38:52,195 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 943 transitions. [2023-02-18 13:38:52,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-02-18 13:38:52,195 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:38:52,196 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:38:52,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2023-02-18 13:38:52,197 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:38:52,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:38:52,198 INFO L85 PathProgramCache]: Analyzing trace with hash -280765008, now seen corresponding path program 1 times [2023-02-18 13:38:52,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:38:52,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600056350] [2023-02-18 13:38:52,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:38:52,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:38:52,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:52,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:38:52,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:52,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:38:52,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:52,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-18 13:38:52,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:52,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-02-18 13:38:52,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:52,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:38:52,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:38:52,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600056350] [2023-02-18 13:38:52,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600056350] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:38:52,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:38:52,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-02-18 13:38:52,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501933250] [2023-02-18 13:38:52,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:38:52,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 13:38:52,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:38:52,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 13:38:52,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-02-18 13:38:52,578 INFO L87 Difference]: Start difference. First operand 711 states and 943 transitions. Second operand has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 6 states have internal predecessors, (65), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-18 13:38:56,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:38:56,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:38:56,487 INFO L93 Difference]: Finished difference Result 746 states and 989 transitions. [2023-02-18 13:38:56,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-18 13:38:56,487 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 6 states have internal predecessors, (65), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 74 [2023-02-18 13:38:56,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:38:56,489 INFO L225 Difference]: With dead ends: 746 [2023-02-18 13:38:56,489 INFO L226 Difference]: Without dead ends: 726 [2023-02-18 13:38:56,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-02-18 13:38:56,489 INFO L413 NwaCegarLoop]: 376 mSDtfsCounter, 586 mSDsluCounter, 2589 mSDsCounter, 0 mSdLazyCounter, 1915 mSolverCounterSat, 201 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 593 SdHoareTripleChecker+Valid, 2965 SdHoareTripleChecker+Invalid, 2117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 1915 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-02-18 13:38:56,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [593 Valid, 2965 Invalid, 2117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 1915 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2023-02-18 13:38:56,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2023-02-18 13:38:56,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 704. [2023-02-18 13:38:56,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 603 states have (on average 1.3101160862354893) internal successors, (790), 616 states have internal predecessors, (790), 60 states have call successors, (60), 33 states have call predecessors, (60), 40 states have return successors, (83), 57 states have call predecessors, (83), 52 states have call successors, (83) [2023-02-18 13:38:56,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 933 transitions. [2023-02-18 13:38:56,546 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 933 transitions. Word has length 74 [2023-02-18 13:38:56,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:38:56,546 INFO L495 AbstractCegarLoop]: Abstraction has 704 states and 933 transitions. [2023-02-18 13:38:56,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 6 states have internal predecessors, (65), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-18 13:38:56,547 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 933 transitions. [2023-02-18 13:38:56,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-02-18 13:38:56,547 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:38:56,547 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:38:56,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2023-02-18 13:38:56,548 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:38:56,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:38:56,548 INFO L85 PathProgramCache]: Analyzing trace with hash 480971669, now seen corresponding path program 1 times [2023-02-18 13:38:56,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:38:56,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349885165] [2023-02-18 13:38:56,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:38:56,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:38:56,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:56,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:38:56,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:56,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:38:56,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:56,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-18 13:38:56,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:56,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-18 13:38:56,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:38:56,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:38:56,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:38:56,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349885165] [2023-02-18 13:38:56,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349885165] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:38:56,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:38:56,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-18 13:38:56,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473757247] [2023-02-18 13:38:56,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:38:56,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 13:38:56,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:38:56,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 13:38:56,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-02-18 13:38:56,716 INFO L87 Difference]: Start difference. First operand 704 states and 933 transitions. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 13:38:59,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:38:59,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:38:59,854 INFO L93 Difference]: Finished difference Result 770 states and 1017 transitions. [2023-02-18 13:38:59,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-18 13:38:59,854 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 74 [2023-02-18 13:38:59,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:38:59,855 INFO L225 Difference]: With dead ends: 770 [2023-02-18 13:38:59,855 INFO L226 Difference]: Without dead ends: 745 [2023-02-18 13:38:59,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2023-02-18 13:38:59,856 INFO L413 NwaCegarLoop]: 372 mSDtfsCounter, 582 mSDsluCounter, 973 mSDsCounter, 0 mSdLazyCounter, 877 mSolverCounterSat, 160 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 1345 SdHoareTripleChecker+Invalid, 1038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 877 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-02-18 13:38:59,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [587 Valid, 1345 Invalid, 1038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 877 Invalid, 1 Unknown, 0 Unchecked, 3.0s Time] [2023-02-18 13:38:59,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2023-02-18 13:38:59,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 704. [2023-02-18 13:38:59,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 603 states have (on average 1.3101160862354893) internal successors, (790), 616 states have internal predecessors, (790), 60 states have call successors, (60), 33 states have call predecessors, (60), 40 states have return successors, (83), 57 states have call predecessors, (83), 52 states have call successors, (83) [2023-02-18 13:38:59,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 933 transitions. [2023-02-18 13:38:59,913 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 933 transitions. Word has length 74 [2023-02-18 13:38:59,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:38:59,914 INFO L495 AbstractCegarLoop]: Abstraction has 704 states and 933 transitions. [2023-02-18 13:38:59,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 13:38:59,914 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 933 transitions. [2023-02-18 13:38:59,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-02-18 13:38:59,915 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:38:59,919 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:38:59,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2023-02-18 13:38:59,919 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:38:59,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:38:59,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1022183255, now seen corresponding path program 1 times [2023-02-18 13:38:59,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:38:59,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853385060] [2023-02-18 13:38:59,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:38:59,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:39:00,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:00,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:39:00,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:00,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:39:00,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:00,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-18 13:39:00,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:00,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-02-18 13:39:00,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:00,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-02-18 13:39:00,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:00,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:39:00,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:00,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:39:00,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:39:00,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853385060] [2023-02-18 13:39:00,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853385060] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:39:00,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:39:00,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-18 13:39:00,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944311042] [2023-02-18 13:39:00,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:39:00,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 13:39:00,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:39:00,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 13:39:00,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-02-18 13:39:00,241 INFO L87 Difference]: Start difference. First operand 704 states and 933 transitions. Second operand has 9 states, 9 states have (on average 7.0) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (8), 7 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-18 13:39:03,406 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:39:05,487 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:39:07,611 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:39:07,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:39:07,975 INFO L93 Difference]: Finished difference Result 1416 states and 1930 transitions. [2023-02-18 13:39:07,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-18 13:39:07,975 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.0) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (8), 7 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 77 [2023-02-18 13:39:07,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:39:07,980 INFO L225 Difference]: With dead ends: 1416 [2023-02-18 13:39:07,980 INFO L226 Difference]: Without dead ends: 1065 [2023-02-18 13:39:07,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=206, Invalid=550, Unknown=0, NotChecked=0, Total=756 [2023-02-18 13:39:07,981 INFO L413 NwaCegarLoop]: 387 mSDtfsCounter, 1567 mSDsluCounter, 1495 mSDsCounter, 0 mSdLazyCounter, 1452 mSolverCounterSat, 367 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1596 SdHoareTripleChecker+Valid, 1882 SdHoareTripleChecker+Invalid, 1822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 367 IncrementalHoareTripleChecker+Valid, 1452 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2023-02-18 13:39:07,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1596 Valid, 1882 Invalid, 1822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [367 Valid, 1452 Invalid, 3 Unknown, 0 Unchecked, 7.5s Time] [2023-02-18 13:39:07,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2023-02-18 13:39:08,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 868. [2023-02-18 13:39:08,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 746 states have (on average 1.3136729222520107) internal successors, (980), 763 states have internal predecessors, (980), 71 states have call successors, (71), 40 states have call predecessors, (71), 50 states have return successors, (115), 67 states have call predecessors, (115), 63 states have call successors, (115) [2023-02-18 13:39:08,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 1166 transitions. [2023-02-18 13:39:08,059 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 1166 transitions. Word has length 77 [2023-02-18 13:39:08,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:39:08,059 INFO L495 AbstractCegarLoop]: Abstraction has 868 states and 1166 transitions. [2023-02-18 13:39:08,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.0) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (8), 7 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-18 13:39:08,059 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 1166 transitions. [2023-02-18 13:39:08,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-02-18 13:39:08,060 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:39:08,060 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:39:08,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2023-02-18 13:39:08,060 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:39:08,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:39:08,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1282723427, now seen corresponding path program 1 times [2023-02-18 13:39:08,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:39:08,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120272418] [2023-02-18 13:39:08,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:39:08,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:39:08,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:08,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:39:08,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:08,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:39:08,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:08,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-18 13:39:08,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:08,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-02-18 13:39:08,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:08,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-18 13:39:08,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:08,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:39:08,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:39:08,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120272418] [2023-02-18 13:39:08,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120272418] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:39:08,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:39:08,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-02-18 13:39:08,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964773908] [2023-02-18 13:39:08,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:39:08,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-18 13:39:08,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:39:08,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-18 13:39:08,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-02-18 13:39:08,420 INFO L87 Difference]: Start difference. First operand 868 states and 1166 transitions. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-18 13:39:11,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:39:12,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:39:12,271 INFO L93 Difference]: Finished difference Result 921 states and 1233 transitions. [2023-02-18 13:39:12,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-18 13:39:12,272 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 77 [2023-02-18 13:39:12,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:39:12,274 INFO L225 Difference]: With dead ends: 921 [2023-02-18 13:39:12,274 INFO L226 Difference]: Without dead ends: 890 [2023-02-18 13:39:12,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2023-02-18 13:39:12,274 INFO L413 NwaCegarLoop]: 370 mSDtfsCounter, 662 mSDsluCounter, 2649 mSDsCounter, 0 mSdLazyCounter, 1920 mSolverCounterSat, 200 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 668 SdHoareTripleChecker+Valid, 3019 SdHoareTripleChecker+Invalid, 2121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 1920 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-02-18 13:39:12,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [668 Valid, 3019 Invalid, 2121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 1920 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2023-02-18 13:39:12,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2023-02-18 13:39:12,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 867. [2023-02-18 13:39:12,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 745 states have (on average 1.3140939597315435) internal successors, (979), 763 states have internal predecessors, (979), 71 states have call successors, (71), 40 states have call predecessors, (71), 50 states have return successors, (114), 66 states have call predecessors, (114), 63 states have call successors, (114) [2023-02-18 13:39:12,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 1164 transitions. [2023-02-18 13:39:12,351 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 1164 transitions. Word has length 77 [2023-02-18 13:39:12,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:39:12,352 INFO L495 AbstractCegarLoop]: Abstraction has 867 states and 1164 transitions. [2023-02-18 13:39:12,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-18 13:39:12,352 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 1164 transitions. [2023-02-18 13:39:12,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-02-18 13:39:12,353 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:39:12,353 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:39:12,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2023-02-18 13:39:12,353 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:39:12,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:39:12,354 INFO L85 PathProgramCache]: Analyzing trace with hash 352900312, now seen corresponding path program 1 times [2023-02-18 13:39:12,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:39:12,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310309637] [2023-02-18 13:39:12,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:39:12,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:39:12,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:12,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:39:12,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:12,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:39:12,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:12,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-18 13:39:12,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:12,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-18 13:39:12,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:12,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:39:12,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:39:12,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310309637] [2023-02-18 13:39:12,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310309637] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:39:12,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:39:12,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-18 13:39:12,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355233215] [2023-02-18 13:39:12,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:39:12,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 13:39:12,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:39:12,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 13:39:12,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-02-18 13:39:12,694 INFO L87 Difference]: Start difference. First operand 867 states and 1164 transitions. Second operand has 10 states, 10 states have (on average 6.8) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 13:39:16,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:39:18,327 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:39:18,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:39:18,651 INFO L93 Difference]: Finished difference Result 920 states and 1231 transitions. [2023-02-18 13:39:18,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-18 13:39:18,651 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.8) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 77 [2023-02-18 13:39:18,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:39:18,653 INFO L225 Difference]: With dead ends: 920 [2023-02-18 13:39:18,653 INFO L226 Difference]: Without dead ends: 888 [2023-02-18 13:39:18,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2023-02-18 13:39:18,655 INFO L413 NwaCegarLoop]: 354 mSDtfsCounter, 487 mSDsluCounter, 2036 mSDsCounter, 0 mSdLazyCounter, 1738 mSolverCounterSat, 67 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 2390 SdHoareTripleChecker+Invalid, 1807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1738 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2023-02-18 13:39:18,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [494 Valid, 2390 Invalid, 1807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1738 Invalid, 2 Unknown, 0 Unchecked, 5.8s Time] [2023-02-18 13:39:18,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2023-02-18 13:39:18,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 856. [2023-02-18 13:39:18,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 734 states have (on average 1.3079019073569482) internal successors, (960), 752 states have internal predecessors, (960), 71 states have call successors, (71), 40 states have call predecessors, (71), 50 states have return successors, (114), 66 states have call predecessors, (114), 63 states have call successors, (114) [2023-02-18 13:39:18,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 1145 transitions. [2023-02-18 13:39:18,731 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 1145 transitions. Word has length 77 [2023-02-18 13:39:18,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:39:18,732 INFO L495 AbstractCegarLoop]: Abstraction has 856 states and 1145 transitions. [2023-02-18 13:39:18,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.8) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 13:39:18,732 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 1145 transitions. [2023-02-18 13:39:18,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-02-18 13:39:18,733 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:39:18,733 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:39:18,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2023-02-18 13:39:18,733 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:39:18,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:39:18,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1731694560, now seen corresponding path program 1 times [2023-02-18 13:39:18,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:39:18,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101918719] [2023-02-18 13:39:18,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:39:18,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:39:18,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:18,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:39:18,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:18,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:39:18,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:18,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-18 13:39:18,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:19,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-02-18 13:39:19,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:19,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-18 13:39:19,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:19,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:39:19,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:39:19,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101918719] [2023-02-18 13:39:19,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101918719] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:39:19,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:39:19,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-02-18 13:39:19,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465092800] [2023-02-18 13:39:19,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:39:19,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 13:39:19,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:39:19,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 13:39:19,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-02-18 13:39:19,206 INFO L87 Difference]: Start difference. First operand 856 states and 1145 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 7 states have internal predecessors, (69), 2 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-18 13:39:23,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:39:25,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:39:25,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:39:25,585 INFO L93 Difference]: Finished difference Result 1009 states and 1339 transitions. [2023-02-18 13:39:25,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-18 13:39:25,585 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 7 states have internal predecessors, (69), 2 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 80 [2023-02-18 13:39:25,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:39:25,587 INFO L225 Difference]: With dead ends: 1009 [2023-02-18 13:39:25,587 INFO L226 Difference]: Without dead ends: 897 [2023-02-18 13:39:25,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2023-02-18 13:39:25,588 INFO L413 NwaCegarLoop]: 366 mSDtfsCounter, 483 mSDsluCounter, 3132 mSDsCounter, 0 mSdLazyCounter, 2381 mSolverCounterSat, 108 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 3498 SdHoareTripleChecker+Invalid, 2491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 2381 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2023-02-18 13:39:25,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [490 Valid, 3498 Invalid, 2491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 2381 Invalid, 2 Unknown, 0 Unchecked, 6.2s Time] [2023-02-18 13:39:25,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2023-02-18 13:39:25,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 859. [2023-02-18 13:39:25,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 736 states have (on average 1.3057065217391304) internal successors, (961), 754 states have internal predecessors, (961), 71 states have call successors, (71), 40 states have call predecessors, (71), 51 states have return successors, (117), 67 states have call predecessors, (117), 63 states have call successors, (117) [2023-02-18 13:39:25,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 1149 transitions. [2023-02-18 13:39:25,668 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 1149 transitions. Word has length 80 [2023-02-18 13:39:25,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:39:25,668 INFO L495 AbstractCegarLoop]: Abstraction has 859 states and 1149 transitions. [2023-02-18 13:39:25,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 7 states have internal predecessors, (69), 2 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-18 13:39:25,669 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 1149 transitions. [2023-02-18 13:39:25,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-02-18 13:39:25,670 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:39:25,670 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:39:25,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2023-02-18 13:39:25,670 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:39:25,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:39:25,670 INFO L85 PathProgramCache]: Analyzing trace with hash 900956810, now seen corresponding path program 1 times [2023-02-18 13:39:25,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:39:25,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570099155] [2023-02-18 13:39:25,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:39:25,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:39:25,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:25,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:39:25,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:25,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:39:25,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:25,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-18 13:39:25,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:25,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-18 13:39:25,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:25,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:39:25,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:39:25,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570099155] [2023-02-18 13:39:25,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570099155] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:39:25,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:39:25,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-18 13:39:25,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230661402] [2023-02-18 13:39:25,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:39:25,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 13:39:25,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:39:25,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 13:39:25,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-18 13:39:25,977 INFO L87 Difference]: Start difference. First operand 859 states and 1149 transitions. Second operand has 10 states, 10 states have (on average 7.0) internal successors, (70), 5 states have internal predecessors, (70), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-18 13:39:29,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:39:31,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:39:31,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:39:31,506 INFO L93 Difference]: Finished difference Result 933 states and 1240 transitions. [2023-02-18 13:39:31,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 13:39:31,506 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 5 states have internal predecessors, (70), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 79 [2023-02-18 13:39:31,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:39:31,508 INFO L225 Difference]: With dead ends: 933 [2023-02-18 13:39:31,508 INFO L226 Difference]: Without dead ends: 889 [2023-02-18 13:39:31,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-02-18 13:39:31,509 INFO L413 NwaCegarLoop]: 377 mSDtfsCounter, 260 mSDsluCounter, 2013 mSDsCounter, 0 mSdLazyCounter, 1397 mSolverCounterSat, 104 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 2390 SdHoareTripleChecker+Invalid, 1503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1397 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2023-02-18 13:39:31,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 2390 Invalid, 1503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1397 Invalid, 2 Unknown, 0 Unchecked, 5.4s Time] [2023-02-18 13:39:31,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2023-02-18 13:39:31,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 856. [2023-02-18 13:39:31,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 733 states have (on average 1.3042291950886766) internal successors, (956), 752 states have internal predecessors, (956), 71 states have call successors, (71), 40 states have call predecessors, (71), 51 states have return successors, (117), 66 states have call predecessors, (117), 63 states have call successors, (117) [2023-02-18 13:39:31,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 1144 transitions. [2023-02-18 13:39:31,590 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 1144 transitions. Word has length 79 [2023-02-18 13:39:31,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:39:31,590 INFO L495 AbstractCegarLoop]: Abstraction has 856 states and 1144 transitions. [2023-02-18 13:39:31,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 5 states have internal predecessors, (70), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-18 13:39:31,591 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 1144 transitions. [2023-02-18 13:39:31,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-02-18 13:39:31,591 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:39:31,592 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:39:31,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2023-02-18 13:39:31,592 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:39:31,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:39:31,592 INFO L85 PathProgramCache]: Analyzing trace with hash 788040377, now seen corresponding path program 1 times [2023-02-18 13:39:31,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:39:31,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296511471] [2023-02-18 13:39:31,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:39:31,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:39:31,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:31,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:39:31,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:31,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:39:31,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:31,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-18 13:39:31,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:31,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-02-18 13:39:31,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:31,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-02-18 13:39:31,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:31,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:39:31,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:31,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:39:31,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:31,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:39:31,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:39:31,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296511471] [2023-02-18 13:39:31,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296511471] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:39:31,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:39:31,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-18 13:39:31,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301481933] [2023-02-18 13:39:31,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:39:31,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 13:39:31,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:39:31,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 13:39:31,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-02-18 13:39:31,774 INFO L87 Difference]: Start difference. First operand 856 states and 1144 transitions. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (9), 7 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2023-02-18 13:39:34,689 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:39:35,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:39:35,002 INFO L93 Difference]: Finished difference Result 1407 states and 1903 transitions. [2023-02-18 13:39:35,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-18 13:39:35,002 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (9), 7 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 83 [2023-02-18 13:39:35,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:39:35,006 INFO L225 Difference]: With dead ends: 1407 [2023-02-18 13:39:35,006 INFO L226 Difference]: Without dead ends: 904 [2023-02-18 13:39:35,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2023-02-18 13:39:35,007 INFO L413 NwaCegarLoop]: 364 mSDtfsCounter, 1052 mSDsluCounter, 1133 mSDsCounter, 0 mSdLazyCounter, 858 mSolverCounterSat, 263 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1058 SdHoareTripleChecker+Valid, 1497 SdHoareTripleChecker+Invalid, 1122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 858 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-02-18 13:39:35,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1058 Valid, 1497 Invalid, 1122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 858 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2023-02-18 13:39:35,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2023-02-18 13:39:35,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 861. [2023-02-18 13:39:35,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 738 states have (on average 1.3062330623306233) internal successors, (964), 757 states have internal predecessors, (964), 71 states have call successors, (71), 40 states have call predecessors, (71), 51 states have return successors, (117), 66 states have call predecessors, (117), 63 states have call successors, (117) [2023-02-18 13:39:35,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 1152 transitions. [2023-02-18 13:39:35,084 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 1152 transitions. Word has length 83 [2023-02-18 13:39:35,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:39:35,084 INFO L495 AbstractCegarLoop]: Abstraction has 861 states and 1152 transitions. [2023-02-18 13:39:35,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (9), 7 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2023-02-18 13:39:35,084 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 1152 transitions. [2023-02-18 13:39:35,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-02-18 13:39:35,085 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:39:35,085 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:39:35,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2023-02-18 13:39:35,085 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:39:35,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:39:35,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1500515065, now seen corresponding path program 1 times [2023-02-18 13:39:35,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:39:35,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827702290] [2023-02-18 13:39:35,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:39:35,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:39:35,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:35,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:39:35,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:35,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:39:35,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:35,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-18 13:39:35,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:35,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-02-18 13:39:35,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:35,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-02-18 13:39:35,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:35,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:39:35,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:35,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:39:35,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:35,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:39:35,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:39:35,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827702290] [2023-02-18 13:39:35,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827702290] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:39:35,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:39:35,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-18 13:39:35,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225073045] [2023-02-18 13:39:35,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:39:35,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 13:39:35,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:39:35,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 13:39:35,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-02-18 13:39:35,307 INFO L87 Difference]: Start difference. First operand 861 states and 1152 transitions. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (9), 8 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-18 13:39:38,199 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:39:38,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:39:38,570 INFO L93 Difference]: Finished difference Result 1544 states and 2065 transitions. [2023-02-18 13:39:38,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-18 13:39:38,571 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (9), 8 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 83 [2023-02-18 13:39:38,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:39:38,575 INFO L225 Difference]: With dead ends: 1544 [2023-02-18 13:39:38,575 INFO L226 Difference]: Without dead ends: 1056 [2023-02-18 13:39:38,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2023-02-18 13:39:38,576 INFO L413 NwaCegarLoop]: 379 mSDtfsCounter, 1011 mSDsluCounter, 1181 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 263 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1020 SdHoareTripleChecker+Valid, 1560 SdHoareTripleChecker+Invalid, 1224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-02-18 13:39:38,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1020 Valid, 1560 Invalid, 1224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 960 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2023-02-18 13:39:38,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2023-02-18 13:39:38,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 998. [2023-02-18 13:39:38,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 998 states, 851 states have (on average 1.2972972972972974) internal successors, (1104), 874 states have internal predecessors, (1104), 82 states have call successors, (82), 46 states have call predecessors, (82), 64 states have return successors, (142), 81 states have call predecessors, (142), 75 states have call successors, (142) [2023-02-18 13:39:38,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 1328 transitions. [2023-02-18 13:39:38,666 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 1328 transitions. Word has length 83 [2023-02-18 13:39:38,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:39:38,666 INFO L495 AbstractCegarLoop]: Abstraction has 998 states and 1328 transitions. [2023-02-18 13:39:38,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (9), 8 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-18 13:39:38,667 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 1328 transitions. [2023-02-18 13:39:38,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-02-18 13:39:38,667 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:39:38,668 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:39:38,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2023-02-18 13:39:38,668 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:39:38,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:39:38,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1125280222, now seen corresponding path program 1 times [2023-02-18 13:39:38,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:39:38,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969464940] [2023-02-18 13:39:38,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:39:38,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:39:38,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:38,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:39:38,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:38,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:39:38,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:38,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-18 13:39:38,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:38,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-18 13:39:38,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:38,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-02-18 13:39:38,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:38,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:39:38,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:39:38,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969464940] [2023-02-18 13:39:38,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969464940] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:39:38,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:39:38,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-02-18 13:39:38,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205426036] [2023-02-18 13:39:38,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:39:38,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 13:39:38,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:39:38,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 13:39:38,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-02-18 13:39:38,966 INFO L87 Difference]: Start difference. First operand 998 states and 1328 transitions. Second operand has 12 states, 12 states have (on average 5.833333333333333) internal successors, (70), 5 states have internal predecessors, (70), 2 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-18 13:39:42,272 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:39:42,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:39:42,592 INFO L93 Difference]: Finished difference Result 1062 states and 1410 transitions. [2023-02-18 13:39:42,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-18 13:39:42,593 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.833333333333333) internal successors, (70), 5 states have internal predecessors, (70), 2 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 81 [2023-02-18 13:39:42,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:39:42,595 INFO L225 Difference]: With dead ends: 1062 [2023-02-18 13:39:42,595 INFO L226 Difference]: Without dead ends: 1037 [2023-02-18 13:39:42,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-02-18 13:39:42,599 INFO L413 NwaCegarLoop]: 365 mSDtfsCounter, 599 mSDsluCounter, 2265 mSDsCounter, 0 mSdLazyCounter, 1672 mSolverCounterSat, 149 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 2630 SdHoareTripleChecker+Invalid, 1822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 1672 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-02-18 13:39:42,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [606 Valid, 2630 Invalid, 1822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 1672 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2023-02-18 13:39:42,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2023-02-18 13:39:42,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 999. [2023-02-18 13:39:42,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 999 states, 852 states have (on average 1.2969483568075117) internal successors, (1105), 874 states have internal predecessors, (1105), 82 states have call successors, (82), 46 states have call predecessors, (82), 64 states have return successors, (142), 82 states have call predecessors, (142), 75 states have call successors, (142) [2023-02-18 13:39:42,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 999 states to 999 states and 1329 transitions. [2023-02-18 13:39:42,690 INFO L78 Accepts]: Start accepts. Automaton has 999 states and 1329 transitions. Word has length 81 [2023-02-18 13:39:42,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:39:42,690 INFO L495 AbstractCegarLoop]: Abstraction has 999 states and 1329 transitions. [2023-02-18 13:39:42,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.833333333333333) internal successors, (70), 5 states have internal predecessors, (70), 2 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-18 13:39:42,690 INFO L276 IsEmpty]: Start isEmpty. Operand 999 states and 1329 transitions. [2023-02-18 13:39:42,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-02-18 13:39:42,691 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:39:42,691 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:39:42,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2023-02-18 13:39:42,692 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:39:42,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:39:42,692 INFO L85 PathProgramCache]: Analyzing trace with hash -464410460, now seen corresponding path program 1 times [2023-02-18 13:39:42,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:39:42,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379516680] [2023-02-18 13:39:42,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:39:42,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:39:42,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:42,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:39:42,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:42,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:39:42,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:42,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-18 13:39:42,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:43,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-18 13:39:43,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:43,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:39:43,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:39:43,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379516680] [2023-02-18 13:39:43,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379516680] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:39:43,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:39:43,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-18 13:39:43,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151733024] [2023-02-18 13:39:43,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:39:43,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 13:39:43,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:39:43,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 13:39:43,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-02-18 13:39:43,057 INFO L87 Difference]: Start difference. First operand 999 states and 1329 transitions. Second operand has 10 states, 10 states have (on average 7.1) internal successors, (71), 5 states have internal predecessors, (71), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 13:39:46,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:39:46,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:39:46,411 INFO L93 Difference]: Finished difference Result 1057 states and 1404 transitions. [2023-02-18 13:39:46,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-18 13:39:46,412 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.1) internal successors, (71), 5 states have internal predecessors, (71), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 80 [2023-02-18 13:39:46,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:39:46,414 INFO L225 Difference]: With dead ends: 1057 [2023-02-18 13:39:46,414 INFO L226 Difference]: Without dead ends: 1021 [2023-02-18 13:39:46,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2023-02-18 13:39:46,414 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 603 mSDsluCounter, 1841 mSDsCounter, 0 mSdLazyCounter, 1455 mSolverCounterSat, 198 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 2188 SdHoareTripleChecker+Invalid, 1654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1455 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-02-18 13:39:46,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [609 Valid, 2188 Invalid, 1654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 1455 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2023-02-18 13:39:46,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1021 states. [2023-02-18 13:39:46,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1021 to 990. [2023-02-18 13:39:46,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 990 states, 844 states have (on average 1.2890995260663507) internal successors, (1088), 867 states have internal predecessors, (1088), 82 states have call successors, (82), 46 states have call predecessors, (82), 63 states have return successors, (139), 80 states have call predecessors, (139), 75 states have call successors, (139) [2023-02-18 13:39:46,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 990 states to 990 states and 1309 transitions. [2023-02-18 13:39:46,502 INFO L78 Accepts]: Start accepts. Automaton has 990 states and 1309 transitions. Word has length 80 [2023-02-18 13:39:46,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:39:46,502 INFO L495 AbstractCegarLoop]: Abstraction has 990 states and 1309 transitions. [2023-02-18 13:39:46,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.1) internal successors, (71), 5 states have internal predecessors, (71), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 13:39:46,502 INFO L276 IsEmpty]: Start isEmpty. Operand 990 states and 1309 transitions. [2023-02-18 13:39:46,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-02-18 13:39:46,503 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:39:46,503 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:39:46,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2023-02-18 13:39:46,504 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:39:46,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:39:46,504 INFO L85 PathProgramCache]: Analyzing trace with hash 318266731, now seen corresponding path program 1 times [2023-02-18 13:39:46,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:39:46,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803403357] [2023-02-18 13:39:46,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:39:46,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:39:46,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:46,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:39:46,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:46,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:39:46,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:46,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-18 13:39:46,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:46,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-02-18 13:39:46,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:46,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-02-18 13:39:46,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:46,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:39:46,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:46,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-02-18 13:39:46,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:46,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:39:46,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:39:46,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803403357] [2023-02-18 13:39:46,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803403357] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:39:46,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:39:46,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-18 13:39:46,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980114894] [2023-02-18 13:39:46,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:39:46,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 13:39:46,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:39:46,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 13:39:46,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-18 13:39:46,812 INFO L87 Difference]: Start difference. First operand 990 states and 1309 transitions. Second operand has 10 states, 10 states have (on average 6.9) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (9), 7 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-18 13:39:50,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:39:50,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:39:50,249 INFO L93 Difference]: Finished difference Result 1497 states and 2001 transitions. [2023-02-18 13:39:50,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 13:39:50,250 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.9) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (9), 7 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 85 [2023-02-18 13:39:50,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:39:50,254 INFO L225 Difference]: With dead ends: 1497 [2023-02-18 13:39:50,254 INFO L226 Difference]: Without dead ends: 923 [2023-02-18 13:39:50,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2023-02-18 13:39:50,255 INFO L413 NwaCegarLoop]: 344 mSDtfsCounter, 750 mSDsluCounter, 1561 mSDsCounter, 0 mSdLazyCounter, 1151 mSolverCounterSat, 204 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 756 SdHoareTripleChecker+Valid, 1905 SdHoareTripleChecker+Invalid, 1356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 1151 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-02-18 13:39:50,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [756 Valid, 1905 Invalid, 1356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 1151 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2023-02-18 13:39:50,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2023-02-18 13:39:50,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 903. [2023-02-18 13:39:50,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 764 states have (on average 1.274869109947644) internal successors, (974), 785 states have internal predecessors, (974), 79 states have call successors, (79), 44 states have call predecessors, (79), 59 states have return successors, (133), 77 states have call predecessors, (133), 73 states have call successors, (133) [2023-02-18 13:39:50,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 1186 transitions. [2023-02-18 13:39:50,335 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 1186 transitions. Word has length 85 [2023-02-18 13:39:50,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:39:50,336 INFO L495 AbstractCegarLoop]: Abstraction has 903 states and 1186 transitions. [2023-02-18 13:39:50,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.9) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (9), 7 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-18 13:39:50,336 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 1186 transitions. [2023-02-18 13:39:50,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-02-18 13:39:50,337 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:39:50,337 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:39:50,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2023-02-18 13:39:50,337 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:39:50,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:39:50,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1988792666, now seen corresponding path program 1 times [2023-02-18 13:39:50,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:39:50,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027805464] [2023-02-18 13:39:50,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:39:50,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:39:50,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:50,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:39:50,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:50,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:39:50,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:50,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-02-18 13:39:50,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:50,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-18 13:39:50,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:50,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-02-18 13:39:50,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:50,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:39:50,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:50,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:39:50,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:50,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2023-02-18 13:39:50,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:50,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:39:50,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:39:50,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027805464] [2023-02-18 13:39:50,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027805464] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:39:50,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:39:50,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-02-18 13:39:50,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147140359] [2023-02-18 13:39:50,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:39:50,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-18 13:39:50,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:39:50,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-18 13:39:50,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-02-18 13:39:50,653 INFO L87 Difference]: Start difference. First operand 903 states and 1186 transitions. Second operand has 11 states, 11 states have (on average 6.818181818181818) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (10), 8 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2023-02-18 13:39:53,690 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:39:53,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:39:53,947 INFO L93 Difference]: Finished difference Result 1299 states and 1702 transitions. [2023-02-18 13:39:53,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-18 13:39:53,947 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.818181818181818) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (10), 8 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 93 [2023-02-18 13:39:53,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:39:53,950 INFO L225 Difference]: With dead ends: 1299 [2023-02-18 13:39:53,950 INFO L226 Difference]: Without dead ends: 812 [2023-02-18 13:39:53,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2023-02-18 13:39:53,951 INFO L413 NwaCegarLoop]: 344 mSDtfsCounter, 1402 mSDsluCounter, 1308 mSDsCounter, 0 mSdLazyCounter, 1125 mSolverCounterSat, 261 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1427 SdHoareTripleChecker+Valid, 1652 SdHoareTripleChecker+Invalid, 1387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 1125 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-02-18 13:39:53,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1427 Valid, 1652 Invalid, 1387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 1125 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2023-02-18 13:39:53,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2023-02-18 13:39:54,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 792. [2023-02-18 13:39:54,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 671 states have (on average 1.2652757078986587) internal successors, (849), 689 states have internal predecessors, (849), 70 states have call successors, (70), 40 states have call predecessors, (70), 50 states have return successors, (103), 66 states have call predecessors, (103), 64 states have call successors, (103) [2023-02-18 13:39:54,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1022 transitions. [2023-02-18 13:39:54,022 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1022 transitions. Word has length 93 [2023-02-18 13:39:54,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:39:54,023 INFO L495 AbstractCegarLoop]: Abstraction has 792 states and 1022 transitions. [2023-02-18 13:39:54,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.818181818181818) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (10), 8 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2023-02-18 13:39:54,023 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1022 transitions. [2023-02-18 13:39:54,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-02-18 13:39:54,024 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:39:54,024 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:39:54,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2023-02-18 13:39:54,024 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:39:54,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:39:54,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1272875183, now seen corresponding path program 1 times [2023-02-18 13:39:54,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:39:54,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291216766] [2023-02-18 13:39:54,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:39:54,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:39:54,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:54,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:39:54,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:54,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:39:54,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:54,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-18 13:39:54,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:54,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-02-18 13:39:54,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:54,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-18 13:39:54,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:54,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:39:54,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:39:54,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291216766] [2023-02-18 13:39:54,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291216766] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:39:54,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:39:54,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-02-18 13:39:54,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555424706] [2023-02-18 13:39:54,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:39:54,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-18 13:39:54,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:39:54,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-18 13:39:54,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-02-18 13:39:54,347 INFO L87 Difference]: Start difference. First operand 792 states and 1022 transitions. Second operand has 11 states, 11 states have (on average 6.818181818181818) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-18 13:39:57,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:39:58,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:39:58,103 INFO L93 Difference]: Finished difference Result 834 states and 1076 transitions. [2023-02-18 13:39:58,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-18 13:39:58,103 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.818181818181818) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 86 [2023-02-18 13:39:58,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:39:58,104 INFO L225 Difference]: With dead ends: 834 [2023-02-18 13:39:58,104 INFO L226 Difference]: Without dead ends: 765 [2023-02-18 13:39:58,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2023-02-18 13:39:58,105 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 612 mSDsluCounter, 1808 mSDsCounter, 0 mSdLazyCounter, 1377 mSolverCounterSat, 234 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 2149 SdHoareTripleChecker+Invalid, 1612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 1377 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-02-18 13:39:58,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [618 Valid, 2149 Invalid, 1612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 1377 Invalid, 1 Unknown, 0 Unchecked, 3.6s Time] [2023-02-18 13:39:58,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2023-02-18 13:39:58,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 743. [2023-02-18 13:39:58,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 625 states have (on average 1.2432) internal successors, (777), 642 states have internal predecessors, (777), 68 states have call successors, (68), 40 states have call predecessors, (68), 49 states have return successors, (99), 64 states have call predecessors, (99), 62 states have call successors, (99) [2023-02-18 13:39:58,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 944 transitions. [2023-02-18 13:39:58,174 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 944 transitions. Word has length 86 [2023-02-18 13:39:58,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:39:58,175 INFO L495 AbstractCegarLoop]: Abstraction has 743 states and 944 transitions. [2023-02-18 13:39:58,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.818181818181818) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-18 13:39:58,175 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 944 transitions. [2023-02-18 13:39:58,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-02-18 13:39:58,176 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:39:58,176 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:39:58,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2023-02-18 13:39:58,176 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:39:58,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:39:58,176 INFO L85 PathProgramCache]: Analyzing trace with hash 868554885, now seen corresponding path program 1 times [2023-02-18 13:39:58,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:39:58,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972383162] [2023-02-18 13:39:58,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:39:58,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:39:58,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:58,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:39:58,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:58,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:39:58,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:58,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-02-18 13:39:58,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:58,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-02-18 13:39:58,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:58,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-02-18 13:39:58,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:39:58,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:39:58,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:39:58,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972383162] [2023-02-18 13:39:58,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972383162] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:39:58,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:39:58,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-02-18 13:39:58,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411483348] [2023-02-18 13:39:58,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:39:58,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 13:39:58,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:39:58,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 13:39:58,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-02-18 13:39:58,452 INFO L87 Difference]: Start difference. First operand 743 states and 944 transitions. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 7 states have internal predecessors, (75), 3 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-18 13:40:02,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:40:04,176 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 [] [2023-02-18 13:40:04,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:40:04,589 INFO L93 Difference]: Finished difference Result 780 states and 993 transitions. [2023-02-18 13:40:04,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-18 13:40:04,591 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 7 states have internal predecessors, (75), 3 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 86 [2023-02-18 13:40:04,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:40:04,592 INFO L225 Difference]: With dead ends: 780 [2023-02-18 13:40:04,592 INFO L226 Difference]: Without dead ends: 728 [2023-02-18 13:40:04,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2023-02-18 13:40:04,592 INFO L413 NwaCegarLoop]: 294 mSDtfsCounter, 313 mSDsluCounter, 2106 mSDsCounter, 0 mSdLazyCounter, 1861 mSolverCounterSat, 58 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 2400 SdHoareTripleChecker+Invalid, 1921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1861 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2023-02-18 13:40:04,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 2400 Invalid, 1921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1861 Invalid, 2 Unknown, 0 Unchecked, 6.0s Time] [2023-02-18 13:40:04,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2023-02-18 13:40:04,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 708. [2023-02-18 13:40:04,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 708 states, 597 states have (on average 1.2462311557788945) internal successors, (744), 614 states have internal predecessors, (744), 64 states have call successors, (64), 37 states have call predecessors, (64), 46 states have return successors, (95), 60 states have call predecessors, (95), 58 states have call successors, (95) [2023-02-18 13:40:04,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 903 transitions. [2023-02-18 13:40:04,657 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 903 transitions. Word has length 86 [2023-02-18 13:40:04,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:40:04,658 INFO L495 AbstractCegarLoop]: Abstraction has 708 states and 903 transitions. [2023-02-18 13:40:04,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 7 states have internal predecessors, (75), 3 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-18 13:40:04,660 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 903 transitions. [2023-02-18 13:40:04,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-02-18 13:40:04,661 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:40:04,661 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:40:04,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2023-02-18 13:40:04,661 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:40:04,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:40:04,662 INFO L85 PathProgramCache]: Analyzing trace with hash 773093388, now seen corresponding path program 1 times [2023-02-18 13:40:04,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:40:04,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874838178] [2023-02-18 13:40:04,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:40:04,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:40:04,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:04,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:40:04,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:04,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:40:04,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:04,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-02-18 13:40:04,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:04,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-18 13:40:04,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:04,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-02-18 13:40:04,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:04,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:40:04,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:40:04,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874838178] [2023-02-18 13:40:04,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874838178] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:40:04,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:40:04,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-18 13:40:04,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090713018] [2023-02-18 13:40:04,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:40:04,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 13:40:04,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:40:04,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 13:40:04,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-02-18 13:40:04,950 INFO L87 Difference]: Start difference. First operand 708 states and 903 transitions. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-18 13:40:07,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:40:08,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:40:08,333 INFO L93 Difference]: Finished difference Result 1296 states and 1625 transitions. [2023-02-18 13:40:08,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-18 13:40:08,333 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 86 [2023-02-18 13:40:08,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:40:08,336 INFO L225 Difference]: With dead ends: 1296 [2023-02-18 13:40:08,336 INFO L226 Difference]: Without dead ends: 901 [2023-02-18 13:40:08,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2023-02-18 13:40:08,337 INFO L413 NwaCegarLoop]: 279 mSDtfsCounter, 1189 mSDsluCounter, 1193 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 285 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1208 SdHoareTripleChecker+Valid, 1472 SdHoareTripleChecker+Invalid, 1308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-02-18 13:40:08,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1208 Valid, 1472 Invalid, 1308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 1022 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2023-02-18 13:40:08,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2023-02-18 13:40:08,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 787. [2023-02-18 13:40:08,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 663 states have (on average 1.2292609351432882) internal successors, (815), 679 states have internal predecessors, (815), 66 states have call successors, (66), 47 states have call predecessors, (66), 57 states have return successors, (88), 65 states have call predecessors, (88), 60 states have call successors, (88) [2023-02-18 13:40:08,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 969 transitions. [2023-02-18 13:40:08,418 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 969 transitions. Word has length 86 [2023-02-18 13:40:08,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:40:08,419 INFO L495 AbstractCegarLoop]: Abstraction has 787 states and 969 transitions. [2023-02-18 13:40:08,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-18 13:40:08,419 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 969 transitions. [2023-02-18 13:40:08,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-02-18 13:40:08,420 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:40:08,420 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:40:08,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2023-02-18 13:40:08,420 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:40:08,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:40:08,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1759913001, now seen corresponding path program 1 times [2023-02-18 13:40:08,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:40:08,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100608208] [2023-02-18 13:40:08,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:40:08,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:40:08,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:08,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:40:08,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:08,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:40:08,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:08,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-02-18 13:40:08,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:08,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-18 13:40:08,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:08,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-02-18 13:40:08,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:08,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:40:08,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:08,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:40:08,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:08,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2023-02-18 13:40:08,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:08,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:40:08,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:40:08,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100608208] [2023-02-18 13:40:08,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100608208] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:40:08,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:40:08,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-02-18 13:40:08,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456761185] [2023-02-18 13:40:08,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:40:08,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 13:40:08,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:40:08,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 13:40:08,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-02-18 13:40:08,741 INFO L87 Difference]: Start difference. First operand 787 states and 969 transitions. Second operand has 12 states, 12 states have (on average 6.5) internal successors, (78), 5 states have internal predecessors, (78), 2 states have call successors, (10), 8 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-18 13:40:11,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:40:12,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:40:12,130 INFO L93 Difference]: Finished difference Result 1204 states and 1506 transitions. [2023-02-18 13:40:12,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-18 13:40:12,131 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.5) internal successors, (78), 5 states have internal predecessors, (78), 2 states have call successors, (10), 8 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 96 [2023-02-18 13:40:12,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:40:12,134 INFO L225 Difference]: With dead ends: 1204 [2023-02-18 13:40:12,134 INFO L226 Difference]: Without dead ends: 797 [2023-02-18 13:40:12,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2023-02-18 13:40:12,135 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 602 mSDsluCounter, 1625 mSDsCounter, 0 mSdLazyCounter, 1177 mSolverCounterSat, 215 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 612 SdHoareTripleChecker+Valid, 1898 SdHoareTripleChecker+Invalid, 1393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 1177 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-02-18 13:40:12,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [612 Valid, 1898 Invalid, 1393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 1177 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2023-02-18 13:40:12,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2023-02-18 13:40:12,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 776. [2023-02-18 13:40:12,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 655 states have (on average 1.2259541984732825) internal successors, (803), 670 states have internal predecessors, (803), 64 states have call successors, (64), 46 states have call predecessors, (64), 56 states have return successors, (87), 64 states have call predecessors, (87), 59 states have call successors, (87) [2023-02-18 13:40:12,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 954 transitions. [2023-02-18 13:40:12,213 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 954 transitions. Word has length 96 [2023-02-18 13:40:12,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:40:12,213 INFO L495 AbstractCegarLoop]: Abstraction has 776 states and 954 transitions. [2023-02-18 13:40:12,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.5) internal successors, (78), 5 states have internal predecessors, (78), 2 states have call successors, (10), 8 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-18 13:40:12,213 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 954 transitions. [2023-02-18 13:40:12,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-02-18 13:40:12,214 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:40:12,214 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:40:12,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2023-02-18 13:40:12,214 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:40:12,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:40:12,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1920923923, now seen corresponding path program 1 times [2023-02-18 13:40:12,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:40:12,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275286686] [2023-02-18 13:40:12,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:40:12,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:40:12,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:12,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:40:12,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:12,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:40:12,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:12,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-02-18 13:40:12,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:12,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-18 13:40:12,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:12,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2023-02-18 13:40:12,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:12,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:40:12,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:40:12,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275286686] [2023-02-18 13:40:12,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275286686] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:40:12,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:40:12,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-18 13:40:12,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788442361] [2023-02-18 13:40:12,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:40:12,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 13:40:12,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:40:12,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 13:40:12,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-02-18 13:40:12,493 INFO L87 Difference]: Start difference. First operand 776 states and 954 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-18 13:40:15,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:40:15,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:40:15,897 INFO L93 Difference]: Finished difference Result 842 states and 1035 transitions. [2023-02-18 13:40:15,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 13:40:15,897 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 87 [2023-02-18 13:40:15,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:40:15,898 INFO L225 Difference]: With dead ends: 842 [2023-02-18 13:40:15,898 INFO L226 Difference]: Without dead ends: 791 [2023-02-18 13:40:15,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-02-18 13:40:15,899 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 494 mSDsluCounter, 1166 mSDsCounter, 0 mSdLazyCounter, 1308 mSolverCounterSat, 179 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 1388 SdHoareTripleChecker+Invalid, 1488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 1308 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-02-18 13:40:15,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [495 Valid, 1388 Invalid, 1488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 1308 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2023-02-18 13:40:15,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2023-02-18 13:40:15,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 776. [2023-02-18 13:40:15,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 655 states have (on average 1.2244274809160305) internal successors, (802), 670 states have internal predecessors, (802), 64 states have call successors, (64), 46 states have call predecessors, (64), 56 states have return successors, (87), 64 states have call predecessors, (87), 59 states have call successors, (87) [2023-02-18 13:40:15,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 953 transitions. [2023-02-18 13:40:15,977 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 953 transitions. Word has length 87 [2023-02-18 13:40:15,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:40:15,977 INFO L495 AbstractCegarLoop]: Abstraction has 776 states and 953 transitions. [2023-02-18 13:40:15,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-18 13:40:15,977 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 953 transitions. [2023-02-18 13:40:15,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-02-18 13:40:15,978 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:40:15,978 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:40:15,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2023-02-18 13:40:15,978 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:40:15,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:40:15,979 INFO L85 PathProgramCache]: Analyzing trace with hash 985884663, now seen corresponding path program 1 times [2023-02-18 13:40:15,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:40:15,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166350355] [2023-02-18 13:40:15,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:40:15,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:40:16,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:16,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:40:16,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:16,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:40:16,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:16,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-18 13:40:16,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:16,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-02-18 13:40:16,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:16,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-02-18 13:40:16,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:16,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:40:16,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:16,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:40:16,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:16,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2023-02-18 13:40:16,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:16,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:40:16,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:40:16,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166350355] [2023-02-18 13:40:16,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166350355] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:40:16,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:40:16,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-02-18 13:40:16,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047657539] [2023-02-18 13:40:16,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:40:16,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 13:40:16,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:40:16,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 13:40:16,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-02-18 13:40:16,319 INFO L87 Difference]: Start difference. First operand 776 states and 953 transitions. Second operand has 12 states, 12 states have (on average 6.166666666666667) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (10), 8 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-18 13:40:19,588 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:40:19,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:40:19,937 INFO L93 Difference]: Finished difference Result 1154 states and 1435 transitions. [2023-02-18 13:40:19,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-18 13:40:19,938 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.166666666666667) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (10), 8 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 92 [2023-02-18 13:40:19,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:40:19,940 INFO L225 Difference]: With dead ends: 1154 [2023-02-18 13:40:19,941 INFO L226 Difference]: Without dead ends: 797 [2023-02-18 13:40:19,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2023-02-18 13:40:19,941 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 415 mSDsluCounter, 1754 mSDsCounter, 0 mSdLazyCounter, 1368 mSolverCounterSat, 161 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 2023 SdHoareTripleChecker+Invalid, 1530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 1368 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-02-18 13:40:19,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 2023 Invalid, 1530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 1368 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2023-02-18 13:40:19,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2023-02-18 13:40:20,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 776. [2023-02-18 13:40:20,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 655 states have (on average 1.2229007633587787) internal successors, (801), 670 states have internal predecessors, (801), 64 states have call successors, (64), 46 states have call predecessors, (64), 56 states have return successors, (87), 64 states have call predecessors, (87), 59 states have call successors, (87) [2023-02-18 13:40:20,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 952 transitions. [2023-02-18 13:40:20,019 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 952 transitions. Word has length 92 [2023-02-18 13:40:20,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:40:20,019 INFO L495 AbstractCegarLoop]: Abstraction has 776 states and 952 transitions. [2023-02-18 13:40:20,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.166666666666667) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (10), 8 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-18 13:40:20,019 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 952 transitions. [2023-02-18 13:40:20,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-02-18 13:40:20,020 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:40:20,020 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:40:20,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2023-02-18 13:40:20,021 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:40:20,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:40:20,021 INFO L85 PathProgramCache]: Analyzing trace with hash -751551231, now seen corresponding path program 1 times [2023-02-18 13:40:20,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:40:20,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810822705] [2023-02-18 13:40:20,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:40:20,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:40:20,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:20,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:40:20,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:20,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:40:20,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:20,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-02-18 13:40:20,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:20,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-18 13:40:20,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:20,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-02-18 13:40:20,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:20,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:40:20,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:20,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:40:20,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:20,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-02-18 13:40:20,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:20,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2023-02-18 13:40:20,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:20,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:40:20,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:40:20,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810822705] [2023-02-18 13:40:20,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810822705] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:40:20,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:40:20,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-02-18 13:40:20,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993144509] [2023-02-18 13:40:20,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:40:20,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-18 13:40:20,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:40:20,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-18 13:40:20,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-02-18 13:40:20,269 INFO L87 Difference]: Start difference. First operand 776 states and 952 transitions. Second operand has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 5 states have internal predecessors, (86), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-02-18 13:40:23,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:40:25,705 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:40:26,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:40:26,171 INFO L93 Difference]: Finished difference Result 1126 states and 1396 transitions. [2023-02-18 13:40:26,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-18 13:40:26,171 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 5 states have internal predecessors, (86), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 106 [2023-02-18 13:40:26,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:40:26,174 INFO L225 Difference]: With dead ends: 1126 [2023-02-18 13:40:26,174 INFO L226 Difference]: Without dead ends: 739 [2023-02-18 13:40:26,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2023-02-18 13:40:26,176 INFO L413 NwaCegarLoop]: 302 mSDtfsCounter, 558 mSDsluCounter, 1613 mSDsCounter, 0 mSdLazyCounter, 1569 mSolverCounterSat, 114 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 1915 SdHoareTripleChecker+Invalid, 1685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1569 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2023-02-18 13:40:26,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [561 Valid, 1915 Invalid, 1685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1569 Invalid, 2 Unknown, 0 Unchecked, 5.8s Time] [2023-02-18 13:40:26,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2023-02-18 13:40:26,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 719. [2023-02-18 13:40:26,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 612 states have (on average 1.223856209150327) internal successors, (749), 625 states have internal predecessors, (749), 56 states have call successors, (56), 40 states have call predecessors, (56), 50 states have return successors, (68), 58 states have call predecessors, (68), 52 states have call successors, (68) [2023-02-18 13:40:26,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 873 transitions. [2023-02-18 13:40:26,245 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 873 transitions. Word has length 106 [2023-02-18 13:40:26,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:40:26,245 INFO L495 AbstractCegarLoop]: Abstraction has 719 states and 873 transitions. [2023-02-18 13:40:26,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 5 states have internal predecessors, (86), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-02-18 13:40:26,246 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 873 transitions. [2023-02-18 13:40:26,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-02-18 13:40:26,246 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:40:26,247 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:40:26,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2023-02-18 13:40:26,247 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:40:26,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:40:26,247 INFO L85 PathProgramCache]: Analyzing trace with hash -751062957, now seen corresponding path program 1 times [2023-02-18 13:40:26,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:40:26,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951141694] [2023-02-18 13:40:26,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:40:26,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:40:26,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:26,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:40:26,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:26,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:40:26,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:26,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-02-18 13:40:26,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:26,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-02-18 13:40:26,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:26,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-02-18 13:40:26,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:26,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:40:26,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:40:26,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951141694] [2023-02-18 13:40:26,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951141694] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:40:26,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:40:26,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-02-18 13:40:26,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693886061] [2023-02-18 13:40:26,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:40:26,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-18 13:40:26,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:40:26,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-18 13:40:26,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2023-02-18 13:40:26,548 INFO L87 Difference]: Start difference. First operand 719 states and 873 transitions. Second operand has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 7 states have internal predecessors, (85), 2 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-18 13:40:29,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:40:30,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:40:30,429 INFO L93 Difference]: Finished difference Result 742 states and 905 transitions. [2023-02-18 13:40:30,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-18 13:40:30,429 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 7 states have internal predecessors, (85), 2 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 96 [2023-02-18 13:40:30,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:40:30,431 INFO L225 Difference]: With dead ends: 742 [2023-02-18 13:40:30,431 INFO L226 Difference]: Without dead ends: 663 [2023-02-18 13:40:30,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2023-02-18 13:40:30,431 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 592 mSDsluCounter, 1673 mSDsCounter, 0 mSdLazyCounter, 1956 mSolverCounterSat, 208 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 594 SdHoareTripleChecker+Valid, 1891 SdHoareTripleChecker+Invalid, 2165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 1956 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-02-18 13:40:30,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [594 Valid, 1891 Invalid, 2165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 1956 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2023-02-18 13:40:30,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2023-02-18 13:40:30,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 646. [2023-02-18 13:40:30,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 545 states have (on average 1.2256880733944955) internal successors, (668), 558 states have internal predecessors, (668), 53 states have call successors, (53), 37 states have call predecessors, (53), 47 states have return successors, (65), 55 states have call predecessors, (65), 49 states have call successors, (65) [2023-02-18 13:40:30,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 786 transitions. [2023-02-18 13:40:30,496 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 786 transitions. Word has length 96 [2023-02-18 13:40:30,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:40:30,496 INFO L495 AbstractCegarLoop]: Abstraction has 646 states and 786 transitions. [2023-02-18 13:40:30,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 7 states have internal predecessors, (85), 2 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-02-18 13:40:30,496 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 786 transitions. [2023-02-18 13:40:30,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-02-18 13:40:30,497 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:40:30,497 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:40:30,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2023-02-18 13:40:30,497 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:40:30,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:40:30,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1717048505, now seen corresponding path program 1 times [2023-02-18 13:40:30,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:40:30,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088442758] [2023-02-18 13:40:30,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:40:30,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:40:30,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:30,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:40:30,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:30,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:40:30,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:30,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-18 13:40:30,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:30,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-02-18 13:40:30,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:30,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-02-18 13:40:30,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:30,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:40:30,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:30,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:40:30,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:30,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-02-18 13:40:30,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:30,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2023-02-18 13:40:30,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:30,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:40:30,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:40:30,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088442758] [2023-02-18 13:40:30,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088442758] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:40:30,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:40:30,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-02-18 13:40:30,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683459047] [2023-02-18 13:40:30,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:40:30,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-18 13:40:30,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:40:30,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-18 13:40:30,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2023-02-18 13:40:30,830 INFO L87 Difference]: Start difference. First operand 646 states and 786 transitions. Second operand has 13 states, 13 states have (on average 7.0) internal successors, (91), 7 states have internal predecessors, (91), 3 states have call successors, (10), 8 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-02-18 13:40:33,573 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:40:33,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:40:33,967 INFO L93 Difference]: Finished difference Result 861 states and 1048 transitions. [2023-02-18 13:40:33,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-18 13:40:33,968 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.0) internal successors, (91), 7 states have internal predecessors, (91), 3 states have call successors, (10), 8 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 110 [2023-02-18 13:40:33,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:40:33,970 INFO L225 Difference]: With dead ends: 861 [2023-02-18 13:40:33,970 INFO L226 Difference]: Without dead ends: 694 [2023-02-18 13:40:33,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2023-02-18 13:40:33,970 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 543 mSDsluCounter, 1702 mSDsCounter, 0 mSdLazyCounter, 1125 mSolverCounterSat, 141 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 1947 SdHoareTripleChecker+Invalid, 1267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 1125 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-02-18 13:40:33,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [549 Valid, 1947 Invalid, 1267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 1125 Invalid, 1 Unknown, 0 Unchecked, 3.0s Time] [2023-02-18 13:40:33,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2023-02-18 13:40:34,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 657. [2023-02-18 13:40:34,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 555 states have (on average 1.2126126126126127) internal successors, (673), 565 states have internal predecessors, (673), 54 states have call successors, (54), 37 states have call predecessors, (54), 47 states have return successors, (65), 55 states have call predecessors, (65), 49 states have call successors, (65) [2023-02-18 13:40:34,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 792 transitions. [2023-02-18 13:40:34,038 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 792 transitions. Word has length 110 [2023-02-18 13:40:34,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:40:34,039 INFO L495 AbstractCegarLoop]: Abstraction has 657 states and 792 transitions. [2023-02-18 13:40:34,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.0) internal successors, (91), 7 states have internal predecessors, (91), 3 states have call successors, (10), 8 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-02-18 13:40:34,039 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 792 transitions. [2023-02-18 13:40:34,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-02-18 13:40:34,040 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:40:34,040 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:40:34,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2023-02-18 13:40:34,041 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:40:34,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:40:34,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1277151609, now seen corresponding path program 1 times [2023-02-18 13:40:34,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:40:34,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446582544] [2023-02-18 13:40:34,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:40:34,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:40:34,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:34,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:40:34,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:34,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:40:34,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:34,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-18 13:40:34,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:34,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-02-18 13:40:34,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:34,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-02-18 13:40:34,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:34,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:40:34,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:34,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:40:34,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:34,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-02-18 13:40:34,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:34,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-18 13:40:34,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:34,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:40:34,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:34,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:40:34,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:34,437 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-18 13:40:34,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:40:34,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446582544] [2023-02-18 13:40:34,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446582544] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:40:34,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:40:34,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-02-18 13:40:34,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410218446] [2023-02-18 13:40:34,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:40:34,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 13:40:34,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:40:34,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 13:40:34,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-02-18 13:40:34,438 INFO L87 Difference]: Start difference. First operand 657 states and 792 transitions. Second operand has 12 states, 12 states have (on average 7.0) internal successors, (84), 5 states have internal predecessors, (84), 2 states have call successors, (11), 8 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 1 states have call successors, (9) [2023-02-18 13:40:37,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:40:37,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:40:37,410 INFO L93 Difference]: Finished difference Result 697 states and 842 transitions. [2023-02-18 13:40:37,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-18 13:40:37,411 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.0) internal successors, (84), 5 states have internal predecessors, (84), 2 states have call successors, (11), 8 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 1 states have call successors, (9) Word has length 117 [2023-02-18 13:40:37,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:40:37,412 INFO L225 Difference]: With dead ends: 697 [2023-02-18 13:40:37,412 INFO L226 Difference]: Without dead ends: 603 [2023-02-18 13:40:37,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2023-02-18 13:40:37,412 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 337 mSDsluCounter, 1597 mSDsCounter, 0 mSdLazyCounter, 1028 mSolverCounterSat, 140 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 1840 SdHoareTripleChecker+Invalid, 1169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1028 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-02-18 13:40:37,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 1840 Invalid, 1169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1028 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2023-02-18 13:40:37,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2023-02-18 13:40:37,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 467. [2023-02-18 13:40:37,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 392 states have (on average 1.1862244897959184) internal successors, (465), 398 states have internal predecessors, (465), 41 states have call successors, (41), 28 states have call predecessors, (41), 33 states have return successors, (46), 41 states have call predecessors, (46), 38 states have call successors, (46) [2023-02-18 13:40:37,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 552 transitions. [2023-02-18 13:40:37,458 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 552 transitions. Word has length 117 [2023-02-18 13:40:37,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:40:37,459 INFO L495 AbstractCegarLoop]: Abstraction has 467 states and 552 transitions. [2023-02-18 13:40:37,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.0) internal successors, (84), 5 states have internal predecessors, (84), 2 states have call successors, (11), 8 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 1 states have call successors, (9) [2023-02-18 13:40:37,459 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 552 transitions. [2023-02-18 13:40:37,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-02-18 13:40:37,460 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:40:37,460 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:40:37,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2023-02-18 13:40:37,460 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:40:37,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:40:37,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1546029661, now seen corresponding path program 1 times [2023-02-18 13:40:37,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:40:37,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471245454] [2023-02-18 13:40:37,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:40:37,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:40:37,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:37,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:40:37,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:37,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:40:37,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:37,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-18 13:40:37,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:37,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-18 13:40:37,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:37,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-18 13:40:37,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:37,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-02-18 13:40:37,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:37,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-02-18 13:40:37,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:37,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-02-18 13:40:37,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:37,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-02-18 13:40:37,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:37,817 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-02-18 13:40:37,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:40:37,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471245454] [2023-02-18 13:40:37,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471245454] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:40:37,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:40:37,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-18 13:40:37,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533883726] [2023-02-18 13:40:37,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:40:37,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 13:40:37,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:40:37,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 13:40:37,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-18 13:40:37,822 INFO L87 Difference]: Start difference. First operand 467 states and 552 transitions. Second operand has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 4 states have internal predecessors, (86), 3 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2023-02-18 13:40:40,343 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:40:40,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:40:40,567 INFO L93 Difference]: Finished difference Result 532 states and 637 transitions. [2023-02-18 13:40:40,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 13:40:40,567 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 4 states have internal predecessors, (86), 3 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 116 [2023-02-18 13:40:40,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:40:40,568 INFO L225 Difference]: With dead ends: 532 [2023-02-18 13:40:40,568 INFO L226 Difference]: Without dead ends: 506 [2023-02-18 13:40:40,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-02-18 13:40:40,569 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 233 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 102 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 1005 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-02-18 13:40:40,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 1005 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 544 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2023-02-18 13:40:40,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2023-02-18 13:40:40,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 484. [2023-02-18 13:40:40,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 408 states have (on average 1.1862745098039216) internal successors, (484), 414 states have internal predecessors, (484), 42 states have call successors, (42), 28 states have call predecessors, (42), 33 states have return successors, (47), 42 states have call predecessors, (47), 39 states have call successors, (47) [2023-02-18 13:40:40,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 573 transitions. [2023-02-18 13:40:40,616 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 573 transitions. Word has length 116 [2023-02-18 13:40:40,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:40:40,616 INFO L495 AbstractCegarLoop]: Abstraction has 484 states and 573 transitions. [2023-02-18 13:40:40,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 4 states have internal predecessors, (86), 3 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2023-02-18 13:40:40,617 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 573 transitions. [2023-02-18 13:40:40,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-02-18 13:40:40,617 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:40:40,617 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:40:40,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2023-02-18 13:40:40,618 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:40:40,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:40:40,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1510565347, now seen corresponding path program 1 times [2023-02-18 13:40:40,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:40:40,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066266264] [2023-02-18 13:40:40,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:40:40,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:40:40,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:40,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:40:40,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:40,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:40:40,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:40,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-18 13:40:40,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:40,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-18 13:40:40,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:40,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-18 13:40:40,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:40,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-02-18 13:40:40,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:40,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-02-18 13:40:40,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:40,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-02-18 13:40:40,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:40,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-02-18 13:40:40,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:40,873 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-02-18 13:40:40,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:40:40,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066266264] [2023-02-18 13:40:40,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066266264] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:40:40,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:40:40,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-18 13:40:40,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410145561] [2023-02-18 13:40:40,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:40:40,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 13:40:40,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:40:40,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 13:40:40,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-18 13:40:40,875 INFO L87 Difference]: Start difference. First operand 484 states and 573 transitions. Second operand has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-02-18 13:40:43,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:40:45,630 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:40:45,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:40:45,957 INFO L93 Difference]: Finished difference Result 530 states and 628 transitions. [2023-02-18 13:40:45,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 13:40:45,957 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 116 [2023-02-18 13:40:45,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:40:45,958 INFO L225 Difference]: With dead ends: 530 [2023-02-18 13:40:45,958 INFO L226 Difference]: Without dead ends: 463 [2023-02-18 13:40:45,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-02-18 13:40:45,959 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 142 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 35 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 1065 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-02-18 13:40:45,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 1065 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 681 Invalid, 2 Unknown, 0 Unchecked, 5.0s Time] [2023-02-18 13:40:45,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2023-02-18 13:40:46,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 446. [2023-02-18 13:40:46,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 374 states have (on average 1.1764705882352942) internal successors, (440), 378 states have internal predecessors, (440), 39 states have call successors, (39), 28 states have call predecessors, (39), 32 states have return successors, (45), 40 states have call predecessors, (45), 38 states have call successors, (45) [2023-02-18 13:40:46,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 524 transitions. [2023-02-18 13:40:46,040 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 524 transitions. Word has length 116 [2023-02-18 13:40:46,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:40:46,040 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 524 transitions. [2023-02-18 13:40:46,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-02-18 13:40:46,040 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 524 transitions. [2023-02-18 13:40:46,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-02-18 13:40:46,041 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:40:46,041 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:40:46,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2023-02-18 13:40:46,041 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:40:46,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:40:46,042 INFO L85 PathProgramCache]: Analyzing trace with hash -813147539, now seen corresponding path program 1 times [2023-02-18 13:40:46,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:40:46,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478939329] [2023-02-18 13:40:46,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:40:46,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:40:46,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:46,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:40:46,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:46,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:40:46,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:46,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-02-18 13:40:46,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:46,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-18 13:40:46,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:46,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-02-18 13:40:46,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:46,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:40:46,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:46,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:40:46,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:46,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2023-02-18 13:40:46,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:46,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-02-18 13:40:46,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:46,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2023-02-18 13:40:46,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:46,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:40:46,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:40:46,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478939329] [2023-02-18 13:40:46,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478939329] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:40:46,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:40:46,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-02-18 13:40:46,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814865637] [2023-02-18 13:40:46,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:40:46,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-18 13:40:46,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:40:46,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-18 13:40:46,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-02-18 13:40:46,364 INFO L87 Difference]: Start difference. First operand 446 states and 524 transitions. Second operand has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 5 states have internal predecessors, (101), 2 states have call successors, (11), 9 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2023-02-18 13:40:49,143 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:40:49,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:40:49,686 INFO L93 Difference]: Finished difference Result 516 states and 606 transitions. [2023-02-18 13:40:49,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-18 13:40:49,686 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 5 states have internal predecessors, (101), 2 states have call successors, (11), 9 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 122 [2023-02-18 13:40:49,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:40:49,688 INFO L225 Difference]: With dead ends: 516 [2023-02-18 13:40:49,688 INFO L226 Difference]: Without dead ends: 469 [2023-02-18 13:40:49,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2023-02-18 13:40:49,689 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 605 mSDsluCounter, 1119 mSDsCounter, 0 mSdLazyCounter, 1141 mSolverCounterSat, 192 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 621 SdHoareTripleChecker+Valid, 1312 SdHoareTripleChecker+Invalid, 1334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 1141 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-02-18 13:40:49,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [621 Valid, 1312 Invalid, 1334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 1141 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2023-02-18 13:40:49,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2023-02-18 13:40:49,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 446. [2023-02-18 13:40:49,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 374 states have (on average 1.1764705882352942) internal successors, (440), 378 states have internal predecessors, (440), 39 states have call successors, (39), 28 states have call predecessors, (39), 32 states have return successors, (44), 40 states have call predecessors, (44), 38 states have call successors, (44) [2023-02-18 13:40:49,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 523 transitions. [2023-02-18 13:40:49,736 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 523 transitions. Word has length 122 [2023-02-18 13:40:49,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:40:49,736 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 523 transitions. [2023-02-18 13:40:49,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 5 states have internal predecessors, (101), 2 states have call successors, (11), 9 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2023-02-18 13:40:49,736 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 523 transitions. [2023-02-18 13:40:49,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-02-18 13:40:49,737 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:40:49,737 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:40:49,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2023-02-18 13:40:49,738 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:40:49,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:40:49,738 INFO L85 PathProgramCache]: Analyzing trace with hash 2088850613, now seen corresponding path program 1 times [2023-02-18 13:40:49,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:40:49,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489662162] [2023-02-18 13:40:49,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:40:49,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:40:49,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:49,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:40:49,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:49,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:40:49,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:49,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-02-18 13:40:49,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:49,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-18 13:40:49,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:50,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2023-02-18 13:40:50,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:50,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:40:50,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:50,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:40:50,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:50,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-02-18 13:40:50,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:50,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-02-18 13:40:50,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:50,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2023-02-18 13:40:50,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:50,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:40:50,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:40:50,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489662162] [2023-02-18 13:40:50,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489662162] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:40:50,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:40:50,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-02-18 13:40:50,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718644266] [2023-02-18 13:40:50,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:40:50,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-18 13:40:50,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:40:50,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-18 13:40:50,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-02-18 13:40:50,081 INFO L87 Difference]: Start difference. First operand 446 states and 523 transitions. Second operand has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 6 states have internal predecessors, (101), 4 states have call successors, (11), 9 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-02-18 13:40:53,338 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:40:55,356 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:40:56,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:40:56,123 INFO L93 Difference]: Finished difference Result 849 states and 1009 transitions. [2023-02-18 13:40:56,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-18 13:40:56,123 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 6 states have internal predecessors, (101), 4 states have call successors, (11), 9 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 122 [2023-02-18 13:40:56,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:40:56,126 INFO L225 Difference]: With dead ends: 849 [2023-02-18 13:40:56,126 INFO L226 Difference]: Without dead ends: 776 [2023-02-18 13:40:56,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=220, Invalid=902, Unknown=0, NotChecked=0, Total=1122 [2023-02-18 13:40:56,126 INFO L413 NwaCegarLoop]: 313 mSDtfsCounter, 906 mSDsluCounter, 1972 mSDsCounter, 0 mSdLazyCounter, 1967 mSolverCounterSat, 296 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 920 SdHoareTripleChecker+Valid, 2285 SdHoareTripleChecker+Invalid, 2265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 1967 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2023-02-18 13:40:56,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [920 Valid, 2285 Invalid, 2265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 1967 Invalid, 2 Unknown, 0 Unchecked, 5.8s Time] [2023-02-18 13:40:56,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2023-02-18 13:40:56,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 332. [2023-02-18 13:40:56,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 279 states have (on average 1.1612903225806452) internal successors, (324), 281 states have internal predecessors, (324), 27 states have call successors, (27), 23 states have call predecessors, (27), 25 states have return successors, (29), 27 states have call predecessors, (29), 26 states have call successors, (29) [2023-02-18 13:40:56,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 380 transitions. [2023-02-18 13:40:56,164 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 380 transitions. Word has length 122 [2023-02-18 13:40:56,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:40:56,165 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 380 transitions. [2023-02-18 13:40:56,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 6 states have internal predecessors, (101), 4 states have call successors, (11), 9 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-02-18 13:40:56,165 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 380 transitions. [2023-02-18 13:40:56,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-02-18 13:40:56,166 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:40:56,166 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:40:56,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2023-02-18 13:40:56,166 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:40:56,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:40:56,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1025503595, now seen corresponding path program 1 times [2023-02-18 13:40:56,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:40:56,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121136435] [2023-02-18 13:40:56,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:40:56,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:40:56,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:56,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:40:56,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:56,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:40:56,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:56,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-18 13:40:56,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:56,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-18 13:40:56,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:56,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-18 13:40:56,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:56,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-02-18 13:40:56,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:56,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-02-18 13:40:56,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:56,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2023-02-18 13:40:56,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:56,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-02-18 13:40:56,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:56,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2023-02-18 13:40:56,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:40:56,730 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-02-18 13:40:56,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:40:56,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121136435] [2023-02-18 13:40:56,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121136435] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:40:56,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:40:56,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-02-18 13:40:56,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945981893] [2023-02-18 13:40:56,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:40:56,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-18 13:40:56,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:40:56,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-18 13:40:56,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-02-18 13:40:56,733 INFO L87 Difference]: Start difference. First operand 332 states and 380 transitions. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (11), 6 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2023-02-18 13:40:59,625 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:40:59,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:40:59,887 INFO L93 Difference]: Finished difference Result 369 states and 427 transitions. [2023-02-18 13:40:59,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-18 13:40:59,887 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (11), 6 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 125 [2023-02-18 13:40:59,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:40:59,888 INFO L225 Difference]: With dead ends: 369 [2023-02-18 13:40:59,888 INFO L226 Difference]: Without dead ends: 277 [2023-02-18 13:40:59,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2023-02-18 13:40:59,891 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 358 mSDsluCounter, 1303 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 107 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 1512 SdHoareTripleChecker+Invalid, 1011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-02-18 13:40:59,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 1512 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 903 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2023-02-18 13:40:59,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2023-02-18 13:40:59,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 263. [2023-02-18 13:40:59,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 222 states have (on average 1.1756756756756757) internal successors, (261), 224 states have internal predecessors, (261), 19 states have call successors, (19), 19 states have call predecessors, (19), 21 states have return successors, (21), 19 states have call predecessors, (21), 18 states have call successors, (21) [2023-02-18 13:40:59,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 301 transitions. [2023-02-18 13:40:59,921 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 301 transitions. Word has length 125 [2023-02-18 13:40:59,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:40:59,921 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 301 transitions. [2023-02-18 13:40:59,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (11), 6 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2023-02-18 13:40:59,922 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 301 transitions. [2023-02-18 13:40:59,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-02-18 13:40:59,929 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:40:59,929 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:40:59,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2023-02-18 13:40:59,930 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:40:59,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:40:59,930 INFO L85 PathProgramCache]: Analyzing trace with hash 226053049, now seen corresponding path program 1 times [2023-02-18 13:40:59,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:40:59,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927849898] [2023-02-18 13:40:59,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:40:59,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:41:00,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:41:00,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:41:00,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:41:00,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:41:00,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:41:00,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-18 13:41:00,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:41:00,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-02-18 13:41:00,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:41:00,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-02-18 13:41:00,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:41:00,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:41:00,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:41:00,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:41:00,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:41:00,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-02-18 13:41:00,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:41:00,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2023-02-18 13:41:00,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:41:00,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2023-02-18 13:41:00,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:41:00,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:41:00,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:41:00,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927849898] [2023-02-18 13:41:00,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927849898] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:41:00,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:41:00,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-02-18 13:41:00,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239916483] [2023-02-18 13:41:00,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:41:00,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-18 13:41:00,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:41:00,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-18 13:41:00,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-02-18 13:41:00,258 INFO L87 Difference]: Start difference. First operand 263 states and 301 transitions. Second operand has 11 states, 11 states have (on average 10.0) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (11), 9 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-02-18 13:41:02,862 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:41:04,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:41:04,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:41:04,985 INFO L93 Difference]: Finished difference Result 331 states and 379 transitions. [2023-02-18 13:41:04,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-18 13:41:04,986 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 10.0) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (11), 9 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 131 [2023-02-18 13:41:04,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:41:04,987 INFO L225 Difference]: With dead ends: 331 [2023-02-18 13:41:04,987 INFO L226 Difference]: Without dead ends: 277 [2023-02-18 13:41:04,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2023-02-18 13:41:04,994 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 228 mSDsluCounter, 810 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 47 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 964 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-02-18 13:41:04,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 964 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 544 Invalid, 2 Unknown, 0 Unchecked, 4.7s Time] [2023-02-18 13:41:04,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2023-02-18 13:41:05,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 263. [2023-02-18 13:41:05,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 222 states have (on average 1.1711711711711712) internal successors, (260), 224 states have internal predecessors, (260), 19 states have call successors, (19), 19 states have call predecessors, (19), 21 states have return successors, (21), 19 states have call predecessors, (21), 18 states have call successors, (21) [2023-02-18 13:41:05,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 300 transitions. [2023-02-18 13:41:05,027 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 300 transitions. Word has length 131 [2023-02-18 13:41:05,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:41:05,027 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 300 transitions. [2023-02-18 13:41:05,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.0) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (11), 9 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-02-18 13:41:05,027 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 300 transitions. [2023-02-18 13:41:05,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-02-18 13:41:05,028 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:41:05,028 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:41:05,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2023-02-18 13:41:05,028 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:41:05,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:41:05,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1225615896, now seen corresponding path program 1 times [2023-02-18 13:41:05,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:41:05,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555729838] [2023-02-18 13:41:05,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:41:05,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 13:41:05,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:41:05,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:41:05,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:41:05,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:41:05,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:41:05,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-18 13:41:05,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:41:05,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-02-18 13:41:05,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:41:05,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-02-18 13:41:05,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:41:05,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-18 13:41:05,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:41:05,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-18 13:41:05,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:41:05,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-02-18 13:41:05,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:41:05,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2023-02-18 13:41:05,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:41:05,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-02-18 13:41:05,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 13:41:05,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 13:41:05,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 13:41:05,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555729838] [2023-02-18 13:41:05,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555729838] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 13:41:05,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 13:41:05,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-18 13:41:05,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317613306] [2023-02-18 13:41:05,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 13:41:05,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 13:41:05,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 13:41:05,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 13:41:05,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-02-18 13:41:05,304 INFO L87 Difference]: Start difference. First operand 263 states and 300 transitions. Second operand has 10 states, 10 states have (on average 11.1) internal successors, (111), 3 states have internal predecessors, (111), 2 states have call successors, (11), 9 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-02-18 13:41:07,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-18 13:41:07,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 13:41:07,870 INFO L93 Difference]: Finished difference Result 368 states and 424 transitions. [2023-02-18 13:41:07,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 13:41:07,871 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.1) internal successors, (111), 3 states have internal predecessors, (111), 2 states have call successors, (11), 9 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 132 [2023-02-18 13:41:07,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 13:41:07,872 INFO L225 Difference]: With dead ends: 368 [2023-02-18 13:41:07,872 INFO L226 Difference]: Without dead ends: 316 [2023-02-18 13:41:07,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2023-02-18 13:41:07,873 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 372 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 71 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 870 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-02-18 13:41:07,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [375 Valid, 870 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 400 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2023-02-18 13:41:07,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2023-02-18 13:41:07,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 261. [2023-02-18 13:41:07,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 220 states have (on average 1.1681818181818182) internal successors, (257), 222 states have internal predecessors, (257), 19 states have call successors, (19), 19 states have call predecessors, (19), 21 states have return successors, (21), 19 states have call predecessors, (21), 18 states have call successors, (21) [2023-02-18 13:41:07,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 297 transitions. [2023-02-18 13:41:07,903 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 297 transitions. Word has length 132 [2023-02-18 13:41:07,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 13:41:07,903 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 297 transitions. [2023-02-18 13:41:07,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.1) internal successors, (111), 3 states have internal predecessors, (111), 2 states have call successors, (11), 9 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-02-18 13:41:07,903 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 297 transitions. [2023-02-18 13:41:07,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-02-18 13:41:07,904 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 13:41:07,904 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 13:41:07,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2023-02-18 13:41:07,904 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 13:41:07,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 13:41:07,904 INFO L85 PathProgramCache]: Analyzing trace with hash -271290531, now seen corresponding path program 1 times [2023-02-18 13:41:07,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 13:41:07,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158755213] [2023-02-18 13:41:07,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 13:41:07,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms