./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 a31fd051 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-?-a31fd05 [2023-02-15 10:27:03,101 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 10:27:03,103 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 10:27:03,134 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 10:27:03,134 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 10:27:03,137 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 10:27:03,138 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 10:27:03,140 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 10:27:03,142 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 10:27:03,147 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 10:27:03,148 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 10:27:03,149 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 10:27:03,150 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 10:27:03,151 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 10:27:03,152 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 10:27:03,153 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 10:27:03,154 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 10:27:03,155 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 10:27:03,156 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 10:27:03,161 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 10:27:03,161 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 10:27:03,162 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 10:27:03,163 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 10:27:03,163 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 10:27:03,169 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 10:27:03,169 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 10:27:03,170 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 10:27:03,171 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 10:27:03,171 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 10:27:03,172 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 10:27:03,172 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 10:27:03,172 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 10:27:03,173 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 10:27:03,174 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 10:27:03,175 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 10:27:03,175 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 10:27:03,175 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 10:27:03,175 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 10:27:03,176 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 10:27:03,177 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 10:27:03,178 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 10:27:03,178 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 10:27:03,200 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 10:27:03,201 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 10:27:03,201 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 10:27:03,201 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 10:27:03,202 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 10:27:03,202 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 10:27:03,203 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 10:27:03,203 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 10:27:03,203 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 10:27:03,203 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 10:27:03,204 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 10:27:03,204 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 10:27:03,204 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 10:27:03,204 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 10:27:03,204 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 10:27:03,205 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 10:27:03,205 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 10:27:03,205 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 10:27:03,205 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 10:27:03,205 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 10:27:03,205 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 10:27:03,205 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 10:27:03,206 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 10:27:03,206 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 10:27:03,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 10:27:03,206 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 10:27:03,206 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 10:27:03,206 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 10:27:03,207 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 10:27:03,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 10:27:03,207 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 10:27:03,207 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 10:27:03,207 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 10:27:03,208 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 10:27:03,208 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 10:27:03,208 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13096ecc896a778cf08851ae14dc5c7b87ba00c42e74b90edd25cd2cb7c21f17 [2023-02-15 10:27:03,399 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 10:27:03,415 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 10:27:03,417 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 10:27:03,417 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 10:27:03,418 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 10:27:03,418 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c [2023-02-15 10:27:04,399 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 10:27:04,757 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 10:27:04,758 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c [2023-02-15 10:27:04,795 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de22ad4c2/51784bf918a641e8ba4bbab3029d89ca/FLAG21e41b072 [2023-02-15 10:27:04,806 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de22ad4c2/51784bf918a641e8ba4bbab3029d89ca [2023-02-15 10:27:04,808 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 10:27:04,809 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 10:27:04,810 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 10:27:04,810 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 10:27:04,812 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 10:27:04,813 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 10:27:04" (1/1) ... [2023-02-15 10:27:04,814 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13391836 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:27:04, skipping insertion in model container [2023-02-15 10:27:04,814 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 10:27:04" (1/1) ... [2023-02-15 10:27:04,818 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 10:27:04,894 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 10:27:05,355 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] [2023-02-15 10:27:05,383 WARN L623 FunctionHandler]: Unknown extern function swprintf [2023-02-15 10:27:05,391 WARN L623 FunctionHandler]: Unknown extern function sprintf [2023-02-15 10:27:05,702 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 10:27:05,737 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 10:27:05,788 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] [2023-02-15 10:27:05,796 WARN L623 FunctionHandler]: Unknown extern function swprintf [2023-02-15 10:27:05,797 WARN L623 FunctionHandler]: Unknown extern function sprintf [2023-02-15 10:27:05,966 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 10:27:05,999 INFO L208 MainTranslator]: Completed translation [2023-02-15 10:27:06,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:27:06 WrapperNode [2023-02-15 10:27:06,000 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 10:27:06,001 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 10:27:06,001 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 10:27:06,001 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 10:27:06,006 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:27:06" (1/1) ... [2023-02-15 10:27:06,088 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:27:06" (1/1) ... [2023-02-15 10:27:06,171 INFO L138 Inliner]: procedures = 128, calls = 2895, calls flagged for inlining = 37, calls inlined = 26, statements flattened = 3094 [2023-02-15 10:27:06,171 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 10:27:06,172 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 10:27:06,173 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 10:27:06,173 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 10:27:06,179 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:27:06" (1/1) ... [2023-02-15 10:27:06,179 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:27:06" (1/1) ... [2023-02-15 10:27:06,202 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:27:06" (1/1) ... [2023-02-15 10:27:06,203 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:27:06" (1/1) ... [2023-02-15 10:27:06,297 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:27:06" (1/1) ... [2023-02-15 10:27:06,317 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:27:06" (1/1) ... [2023-02-15 10:27:06,326 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:27:06" (1/1) ... [2023-02-15 10:27:06,334 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:27:06" (1/1) ... [2023-02-15 10:27:06,347 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 10:27:06,348 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 10:27:06,348 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 10:27:06,348 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 10:27:06,349 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:27:06" (1/1) ... [2023-02-15 10:27:06,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 10:27:06,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 10:27:06,393 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) [2023-02-15 10:27:06,399 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 [2023-02-15 10:27:06,418 INFO L130 BoogieDeclarations]: Found specification of procedure IoGetConfigurationInformation [2023-02-15 10:27:06,418 INFO L138 BoogieDeclarations]: Found implementation of procedure IoGetConfigurationInformation [2023-02-15 10:27:06,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-02-15 10:27:06,419 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-02-15 10:27:06,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-02-15 10:27:06,419 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 10:27:06,419 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2023-02-15 10:27:06,420 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2023-02-15 10:27:06,420 INFO L130 BoogieDeclarations]: Found specification of procedure IoSetDeviceInterfaceState [2023-02-15 10:27:06,421 INFO L138 BoogieDeclarations]: Found implementation of procedure IoSetDeviceInterfaceState [2023-02-15 10:27:06,421 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyCreateClose [2023-02-15 10:27:06,421 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyCreateClose [2023-02-15 10:27:06,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 10:27:06,421 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnpComplete [2023-02-15 10:27:06,421 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnpComplete [2023-02-15 10:27:06,421 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2023-02-15 10:27:06,421 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2023-02-15 10:27:06,422 INFO L130 BoogieDeclarations]: Found specification of procedure InterlockedExchange [2023-02-15 10:27:06,422 INFO L138 BoogieDeclarations]: Found implementation of procedure InterlockedExchange [2023-02-15 10:27:06,422 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-02-15 10:27:06,422 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-02-15 10:27:06,422 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2023-02-15 10:27:06,422 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2023-02-15 10:27:06,422 INFO L130 BoogieDeclarations]: Found specification of procedure FlQueueIrpToThread [2023-02-15 10:27:06,423 INFO L138 BoogieDeclarations]: Found implementation of procedure FlQueueIrpToThread [2023-02-15 10:27:06,423 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyDeviceControl [2023-02-15 10:27:06,423 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyDeviceControl [2023-02-15 10:27:06,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-15 10:27:06,424 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 10:27:06,424 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyProcessQueuedRequests [2023-02-15 10:27:06,425 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyProcessQueuedRequests [2023-02-15 10:27:06,425 INFO L130 BoogieDeclarations]: Found specification of procedure ExfInterlockedInsertTailList [2023-02-15 10:27:06,425 INFO L138 BoogieDeclarations]: Found implementation of procedure ExfInterlockedInsertTailList [2023-02-15 10:27:06,425 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-15 10:27:06,425 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-15 10:27:06,426 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2023-02-15 10:27:06,426 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2023-02-15 10:27:06,426 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-15 10:27:06,426 INFO L130 BoogieDeclarations]: Found specification of procedure FlFdcDeviceIo [2023-02-15 10:27:06,426 INFO L138 BoogieDeclarations]: Found implementation of procedure FlFdcDeviceIo [2023-02-15 10:27:06,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 10:27:06,426 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2023-02-15 10:27:06,426 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2023-02-15 10:27:06,427 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memmove [2023-02-15 10:27:06,427 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memmove [2023-02-15 10:27:06,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 10:27:06,427 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_guard [2023-02-15 10:27:06,427 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_guard [2023-02-15 10:27:06,428 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyQueueRequest [2023-02-15 10:27:06,428 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyQueueRequest [2023-02-15 10:27:06,428 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-02-15 10:27:06,428 INFO L130 BoogieDeclarations]: Found specification of procedure ExAllocatePoolWithTag [2023-02-15 10:27:06,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ExAllocatePoolWithTag [2023-02-15 10:27:06,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 10:27:06,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 10:27:06,877 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 10:27:06,879 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 10:27:06,951 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-15 10:27:06,963 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2023-02-15 10:27:06,963 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2023-02-15 10:27:06,965 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-15 10:27:07,100 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##24: assume !false; [2023-02-15 10:27:07,100 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##23: assume false; [2023-02-15 10:27:07,127 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-15 10:27:07,143 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2023-02-15 10:27:07,143 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2023-02-15 10:27:07,230 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-15 10:27:07,249 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2023-02-15 10:27:07,249 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2023-02-15 10:27:07,250 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-15 10:27:07,251 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-15 10:27:07,251 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-15 10:27:07,397 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume !false; [2023-02-15 10:27:07,397 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##24: assume !false; [2023-02-15 10:27:07,397 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##23: assume false; [2023-02-15 10:27:07,397 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##19: assume false; [2023-02-15 10:27:07,397 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume false; [2023-02-15 10:27:07,398 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume !false; [2023-02-15 10:27:07,402 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-15 10:27:07,409 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-15 10:27:07,411 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-15 10:27:07,753 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##38: assume !false; [2023-02-15 10:27:07,753 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##37: assume false; [2023-02-15 10:27:07,753 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##139: assume false; [2023-02-15 10:27:07,753 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##140: assume !false; [2023-02-15 10:27:07,754 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##124: assume !false; [2023-02-15 10:27:07,754 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##123: assume false; [2023-02-15 10:27:07,775 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-15 10:27:07,795 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2023-02-15 10:27:07,795 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2023-02-15 10:27:07,802 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-15 10:27:07,803 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-15 10:27:07,804 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-15 10:27:07,805 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-15 10:27:07,805 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-15 10:27:07,807 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-15 10:27:07,808 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-15 10:27:07,809 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-02-15 10:27:10,912 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##97: assume !false; [2023-02-15 10:27:10,912 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##96: assume false; [2023-02-15 10:27:10,912 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##76: assume false; [2023-02-15 10:27:10,912 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##177: assume !false; [2023-02-15 10:27:10,912 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##176: assume false; [2023-02-15 10:27:10,912 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##77: assume !false; [2023-02-15 10:27:10,912 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##48: assume !false; [2023-02-15 10:27:10,912 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##47: assume false; [2023-02-15 10:27:10,912 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##27: assume !false; [2023-02-15 10:27:10,913 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##26: assume false; [2023-02-15 10:27:10,913 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##162: assume false; [2023-02-15 10:27:10,913 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##163: assume !false; [2023-02-15 10:27:10,913 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##210: assume false; [2023-02-15 10:27:10,913 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##211: assume !false; [2023-02-15 10:27:10,913 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##108: assume !false; [2023-02-15 10:27:10,913 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##107: assume false; [2023-02-15 10:27:10,929 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 10:27:10,942 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 10:27:10,943 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2023-02-15 10:27:10,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 10:27:10 BoogieIcfgContainer [2023-02-15 10:27:10,946 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 10:27:10,951 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 10:27:10,951 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 10:27:10,953 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 10:27:10,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 10:27:04" (1/3) ... [2023-02-15 10:27:10,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2080e0bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 10:27:10, skipping insertion in model container [2023-02-15 10:27:10,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:27:06" (2/3) ... [2023-02-15 10:27:10,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2080e0bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 10:27:10, skipping insertion in model container [2023-02-15 10:27:10,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 10:27:10" (3/3) ... [2023-02-15 10:27:10,956 INFO L112 eAbstractionObserver]: Analyzing ICFG floppy.i.cil-3.c [2023-02-15 10:27:10,968 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 10:27:10,968 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 10:27:11,023 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 10:27:11,028 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;@5d5cb7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 10:27:11,028 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 10:27:11,036 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) [2023-02-15 10:27:11,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-15 10:27:11,045 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:27:11,046 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] [2023-02-15 10:27:11,046 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:27:11,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:27:11,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1811520219, now seen corresponding path program 1 times [2023-02-15 10:27:11,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:27:11,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728241695] [2023-02-15 10:27:11,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:27:11,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:27:11,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:27:11,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:27:11,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:27:11,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:27:11,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:27:11,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:27:11,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:27:11,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728241695] [2023-02-15 10:27:11,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728241695] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:27:11,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:27:11,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 10:27:11,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813125151] [2023-02-15 10:27:11,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:27:11,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 10:27:11,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:27:11,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 10:27:11,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 10:27:11,619 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) [2023-02-15 10:27:15,166 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 [] [2023-02-15 10:27:15,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:27:15,433 INFO L93 Difference]: Finished difference Result 1174 states and 1848 transitions. [2023-02-15 10:27:15,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 10:27:15,435 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 [2023-02-15 10:27:15,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:27:15,450 INFO L225 Difference]: With dead ends: 1174 [2023-02-15 10:27:15,451 INFO L226 Difference]: Without dead ends: 657 [2023-02-15 10:27:15,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-15 10:27:15,460 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 [2023-02-15 10:27:15,477 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] [2023-02-15 10:27:15,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2023-02-15 10:27:15,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 579. [2023-02-15 10:27:15,535 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) [2023-02-15 10:27:15,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 840 transitions. [2023-02-15 10:27:15,540 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 840 transitions. Word has length 26 [2023-02-15 10:27:15,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:27:15,540 INFO L495 AbstractCegarLoop]: Abstraction has 579 states and 840 transitions. [2023-02-15 10:27:15,540 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) [2023-02-15 10:27:15,541 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 840 transitions. [2023-02-15 10:27:15,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-15 10:27:15,542 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:27:15,542 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] [2023-02-15 10:27:15,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 10:27:15,542 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:27:15,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:27:15,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1723209200, now seen corresponding path program 1 times [2023-02-15 10:27:15,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:27:15,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613782551] [2023-02-15 10:27:15,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:27:15,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:27:15,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:27:15,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:27:15,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:27:15,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:27:15,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:27:15,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:27:15,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:27:15,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613782551] [2023-02-15 10:27:15,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613782551] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:27:15,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:27:15,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 10:27:15,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742135496] [2023-02-15 10:27:15,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:27:15,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 10:27:15,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:27:15,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 10:27:15,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 10:27:15,825 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) [2023-02-15 10:27:19,464 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 [] [2023-02-15 10:27:19,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:27:19,691 INFO L93 Difference]: Finished difference Result 1217 states and 1784 transitions. [2023-02-15 10:27:19,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 10:27:19,691 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 [2023-02-15 10:27:19,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:27:19,695 INFO L225 Difference]: With dead ends: 1217 [2023-02-15 10:27:19,695 INFO L226 Difference]: Without dead ends: 657 [2023-02-15 10:27:19,697 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 [2023-02-15 10:27:19,698 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 [2023-02-15 10:27:19,698 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] [2023-02-15 10:27:19,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2023-02-15 10:27:19,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 579. [2023-02-15 10:27:19,743 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) [2023-02-15 10:27:19,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 839 transitions. [2023-02-15 10:27:19,751 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 839 transitions. Word has length 29 [2023-02-15 10:27:19,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:27:19,751 INFO L495 AbstractCegarLoop]: Abstraction has 579 states and 839 transitions. [2023-02-15 10:27:19,751 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) [2023-02-15 10:27:19,751 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 839 transitions. [2023-02-15 10:27:19,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-15 10:27:19,753 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:27:19,753 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] [2023-02-15 10:27:19,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 10:27:19,753 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:27:19,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:27:19,754 INFO L85 PathProgramCache]: Analyzing trace with hash 51194362, now seen corresponding path program 1 times [2023-02-15 10:27:19,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:27:19,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725336784] [2023-02-15 10:27:19,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:27:19,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:27:19,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:27:20,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:27:20,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:27:20,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:27:20,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:27:20,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:27:20,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:27:20,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725336784] [2023-02-15 10:27:20,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725336784] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:27:20,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:27:20,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 10:27:20,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765300220] [2023-02-15 10:27:20,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:27:20,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 10:27:20,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:27:20,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 10:27:20,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 10:27:20,165 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) [2023-02-15 10:27:23,401 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 [] [2023-02-15 10:27:24,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:27:24,547 INFO L93 Difference]: Finished difference Result 1542 states and 2294 transitions. [2023-02-15 10:27:24,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 10:27:24,547 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 [2023-02-15 10:27:24,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:27:24,553 INFO L225 Difference]: With dead ends: 1542 [2023-02-15 10:27:24,553 INFO L226 Difference]: Without dead ends: 1127 [2023-02-15 10:27:24,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-15 10:27:24,555 INFO L413 NwaCegarLoop]: 821 mSDtfsCounter, 1376 mSDsluCounter, 1487 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 380 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s 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, 4.2s IncrementalHoareTripleChecker+Time [2023-02-15 10:27:24,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1413 Valid, 2308 Invalid, 1533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 1152 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2023-02-15 10:27:24,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2023-02-15 10:27:24,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 1008. [2023-02-15 10:27:24,594 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) [2023-02-15 10:27:24,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1008 states to 1008 states and 1485 transitions. [2023-02-15 10:27:24,599 INFO L78 Accepts]: Start accepts. Automaton has 1008 states and 1485 transitions. Word has length 33 [2023-02-15 10:27:24,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:27:24,600 INFO L495 AbstractCegarLoop]: Abstraction has 1008 states and 1485 transitions. [2023-02-15 10:27:24,600 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) [2023-02-15 10:27:24,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1008 states and 1485 transitions. [2023-02-15 10:27:24,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-15 10:27:24,602 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:27:24,602 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] [2023-02-15 10:27:24,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-15 10:27:24,602 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:27:24,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:27:24,603 INFO L85 PathProgramCache]: Analyzing trace with hash -778149095, now seen corresponding path program 1 times [2023-02-15 10:27:24,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:27:24,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376014928] [2023-02-15 10:27:24,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:27:24,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:27:24,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:27:24,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:27:24,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:27:24,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:27:24,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:27:24,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-15 10:27:24,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:27:24,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:27:24,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:27:24,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376014928] [2023-02-15 10:27:24,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376014928] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:27:24,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:27:24,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 10:27:24,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973930351] [2023-02-15 10:27:24,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:27:24,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 10:27:24,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:27:24,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 10:27:24,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 10:27:24,953 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) [2023-02-15 10:27:28,165 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-15 10:27:29,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:27:29,064 INFO L93 Difference]: Finished difference Result 1879 states and 2849 transitions. [2023-02-15 10:27:29,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 10:27:29,065 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 [2023-02-15 10:27:29,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:27:29,073 INFO L225 Difference]: With dead ends: 1879 [2023-02-15 10:27:29,073 INFO L226 Difference]: Without dead ends: 1860 [2023-02-15 10:27:29,074 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 [2023-02-15 10:27:29,076 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, 4.0s IncrementalHoareTripleChecker+Time [2023-02-15 10:27:29,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1572 Valid, 1947 Invalid, 1291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [364 Valid, 926 Invalid, 1 Unknown, 0 Unchecked, 4.0s Time] [2023-02-15 10:27:29,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2023-02-15 10:27:29,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1624. [2023-02-15 10:27:29,135 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) [2023-02-15 10:27:29,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 2437 transitions. [2023-02-15 10:27:29,143 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 2437 transitions. Word has length 45 [2023-02-15 10:27:29,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:27:29,143 INFO L495 AbstractCegarLoop]: Abstraction has 1624 states and 2437 transitions. [2023-02-15 10:27:29,144 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) [2023-02-15 10:27:29,144 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 2437 transitions. [2023-02-15 10:27:29,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-15 10:27:29,148 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:27:29,149 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] [2023-02-15 10:27:29,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-15 10:27:29,149 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:27:29,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:27:29,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1291674765, now seen corresponding path program 1 times [2023-02-15 10:27:29,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:27:29,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120136236] [2023-02-15 10:27:29,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:27:29,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:27:29,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:27:29,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:27:29,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:27:29,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:27:29,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:27:29,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:27:29,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:27:29,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120136236] [2023-02-15 10:27:29,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120136236] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:27:29,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:27:29,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 10:27:29,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673414877] [2023-02-15 10:27:29,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:27:29,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 10:27:29,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:27:29,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 10:27:29,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 10:27:29,338 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) [2023-02-15 10:27:33,089 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 [] [2023-02-15 10:27:33,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:27:33,516 INFO L93 Difference]: Finished difference Result 1856 states and 2829 transitions. [2023-02-15 10:27:33,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 10:27:33,517 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 [2023-02-15 10:27:33,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:27:33,526 INFO L225 Difference]: With dead ends: 1856 [2023-02-15 10:27:33,526 INFO L226 Difference]: Without dead ends: 1852 [2023-02-15 10:27:33,527 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 [2023-02-15 10:27:33,527 INFO L413 NwaCegarLoop]: 635 mSDtfsCounter, 492 mSDsluCounter, 1304 mSDsCounter, 0 mSdLazyCounter, 871 mSolverCounterSat, 221 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s 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, 4.0s IncrementalHoareTripleChecker+Time [2023-02-15 10:27:33,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [508 Valid, 1939 Invalid, 1093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 871 Invalid, 1 Unknown, 0 Unchecked, 4.0s Time] [2023-02-15 10:27:33,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1852 states. [2023-02-15 10:27:33,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1852 to 1657. [2023-02-15 10:27:33,566 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) [2023-02-15 10:27:33,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1657 states to 1657 states and 2484 transitions. [2023-02-15 10:27:33,573 INFO L78 Accepts]: Start accepts. Automaton has 1657 states and 2484 transitions. Word has length 43 [2023-02-15 10:27:33,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:27:33,574 INFO L495 AbstractCegarLoop]: Abstraction has 1657 states and 2484 transitions. [2023-02-15 10:27:33,574 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) [2023-02-15 10:27:33,574 INFO L276 IsEmpty]: Start isEmpty. Operand 1657 states and 2484 transitions. [2023-02-15 10:27:33,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-15 10:27:33,575 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:27:33,575 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] [2023-02-15 10:27:33,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-15 10:27:33,575 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:27:33,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:27:33,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1850160334, now seen corresponding path program 1 times [2023-02-15 10:27:33,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:27:33,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681268922] [2023-02-15 10:27:33,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:27:33,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:27:33,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:27:33,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:27:33,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:27:33,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:27:33,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:27:33,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:27:33,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:27:33,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681268922] [2023-02-15 10:27:33,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681268922] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:27:33,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:27:33,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 10:27:33,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991150087] [2023-02-15 10:27:33,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:27:33,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 10:27:33,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:27:33,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 10:27:33,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 10:27:33,748 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) [2023-02-15 10:27:37,674 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 [] [2023-02-15 10:27:39,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:27:39,226 INFO L93 Difference]: Finished difference Result 3293 states and 5099 transitions. [2023-02-15 10:27:39,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 10:27:39,227 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 [2023-02-15 10:27:39,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:27:39,249 INFO L225 Difference]: With dead ends: 3293 [2023-02-15 10:27:39,249 INFO L226 Difference]: Without dead ends: 3290 [2023-02-15 10:27:39,251 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 [2023-02-15 10:27:39,251 INFO L413 NwaCegarLoop]: 1008 mSDtfsCounter, 958 mSDsluCounter, 1779 mSDsCounter, 0 mSdLazyCounter, 1355 mSolverCounterSat, 277 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s 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, 5.3s IncrementalHoareTripleChecker+Time [2023-02-15 10:27:39,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [987 Valid, 2787 Invalid, 1633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 1355 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2023-02-15 10:27:39,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3290 states. [2023-02-15 10:27:39,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3290 to 2657. [2023-02-15 10:27:39,326 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) [2023-02-15 10:27:39,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2657 states to 2657 states and 4022 transitions. [2023-02-15 10:27:39,343 INFO L78 Accepts]: Start accepts. Automaton has 2657 states and 4022 transitions. Word has length 45 [2023-02-15 10:27:39,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:27:39,343 INFO L495 AbstractCegarLoop]: Abstraction has 2657 states and 4022 transitions. [2023-02-15 10:27:39,344 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) [2023-02-15 10:27:39,344 INFO L276 IsEmpty]: Start isEmpty. Operand 2657 states and 4022 transitions. [2023-02-15 10:27:39,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-15 10:27:39,345 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:27:39,345 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] [2023-02-15 10:27:39,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-15 10:27:39,345 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:27:39,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:27:39,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1615003555, now seen corresponding path program 1 times [2023-02-15 10:27:39,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:27:39,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507567969] [2023-02-15 10:27:39,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:27:39,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:27:39,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:27:39,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:27:39,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:27:39,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:27:39,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:27:39,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-15 10:27:39,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:27:39,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-15 10:27:39,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:27:39,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:27:39,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:27:39,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507567969] [2023-02-15 10:27:39,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507567969] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:27:39,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:27:39,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 10:27:39,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942937370] [2023-02-15 10:27:39,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:27:39,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 10:27:39,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:27:39,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 10:27:39,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-15 10:27:39,593 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) [2023-02-15 10:27:43,289 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 [] [2023-02-15 10:27:45,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:27:45,269 INFO L93 Difference]: Finished difference Result 3942 states and 6165 transitions. [2023-02-15 10:27:45,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 10:27:45,270 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 [2023-02-15 10:27:45,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:27:45,283 INFO L225 Difference]: With dead ends: 3942 [2023-02-15 10:27:45,284 INFO L226 Difference]: Without dead ends: 3937 [2023-02-15 10:27:45,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2023-02-15 10:27:45,286 INFO L413 NwaCegarLoop]: 870 mSDtfsCounter, 1306 mSDsluCounter, 1824 mSDsCounter, 0 mSdLazyCounter, 1848 mSolverCounterSat, 545 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s 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, 5.4s IncrementalHoareTripleChecker+Time [2023-02-15 10:27:45,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1327 Valid, 2694 Invalid, 2394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [545 Valid, 1848 Invalid, 1 Unknown, 0 Unchecked, 5.4s Time] [2023-02-15 10:27:45,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3937 states. [2023-02-15 10:27:45,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3937 to 3272. [2023-02-15 10:27:45,381 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) [2023-02-15 10:27:45,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3272 states to 3272 states and 5005 transitions. [2023-02-15 10:27:45,393 INFO L78 Accepts]: Start accepts. Automaton has 3272 states and 5005 transitions. Word has length 48 [2023-02-15 10:27:45,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:27:45,394 INFO L495 AbstractCegarLoop]: Abstraction has 3272 states and 5005 transitions. [2023-02-15 10:27:45,394 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) [2023-02-15 10:27:45,394 INFO L276 IsEmpty]: Start isEmpty. Operand 3272 states and 5005 transitions. [2023-02-15 10:27:45,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-15 10:27:45,395 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:27:45,395 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] [2023-02-15 10:27:45,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-15 10:27:45,395 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:27:45,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:27:45,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1759276290, now seen corresponding path program 1 times [2023-02-15 10:27:45,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:27:45,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719019769] [2023-02-15 10:27:45,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:27:45,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:27:45,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:27:45,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:27:45,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:27:45,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:27:45,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:27:45,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:27:45,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:27:45,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719019769] [2023-02-15 10:27:45,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719019769] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:27:45,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:27:45,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 10:27:45,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235606018] [2023-02-15 10:27:45,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:27:45,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 10:27:45,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:27:45,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 10:27:45,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 10:27:45,819 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) [2023-02-15 10:27:49,331 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-15 10:27:51,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-15 10:27:52,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:27:52,716 INFO L93 Difference]: Finished difference Result 7046 states and 10914 transitions. [2023-02-15 10:27:52,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 10:27:52,716 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 [2023-02-15 10:27:52,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:27:52,738 INFO L225 Difference]: With dead ends: 7046 [2023-02-15 10:27:52,739 INFO L226 Difference]: Without dead ends: 4021 [2023-02-15 10:27:52,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2023-02-15 10:27:52,751 INFO L413 NwaCegarLoop]: 783 mSDtfsCounter, 2405 mSDsluCounter, 1376 mSDsCounter, 0 mSdLazyCounter, 1285 mSolverCounterSat, 681 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2452 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, 6.5s IncrementalHoareTripleChecker+Time [2023-02-15 10:27:52,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2452 Valid, 2159 Invalid, 1968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [681 Valid, 1285 Invalid, 2 Unknown, 0 Unchecked, 6.5s Time] [2023-02-15 10:27:52,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4021 states. [2023-02-15 10:27:52,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4021 to 3266. [2023-02-15 10:27:52,877 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) [2023-02-15 10:27:52,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3266 states to 3266 states and 4991 transitions. [2023-02-15 10:27:52,889 INFO L78 Accepts]: Start accepts. Automaton has 3266 states and 4991 transitions. Word has length 46 [2023-02-15 10:27:52,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:27:52,889 INFO L495 AbstractCegarLoop]: Abstraction has 3266 states and 4991 transitions. [2023-02-15 10:27:52,889 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) [2023-02-15 10:27:52,890 INFO L276 IsEmpty]: Start isEmpty. Operand 3266 states and 4991 transitions. [2023-02-15 10:27:52,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-15 10:27:52,891 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:27:52,891 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] [2023-02-15 10:27:52,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-15 10:27:52,891 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:27:52,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:27:52,891 INFO L85 PathProgramCache]: Analyzing trace with hash 436509709, now seen corresponding path program 1 times [2023-02-15 10:27:52,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:27:52,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765173494] [2023-02-15 10:27:52,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:27:52,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:27:52,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:27:53,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:27:53,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:27:53,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:27:53,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:27:53,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 10:27:53,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:27:53,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:27:53,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:27:53,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765173494] [2023-02-15 10:27:53,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765173494] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:27:53,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:27:53,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 10:27:53,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632525550] [2023-02-15 10:27:53,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:27:53,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 10:27:53,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:27:53,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 10:27:53,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 10:27:53,121 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) [2023-02-15 10:27:56,543 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 [] [2023-02-15 10:27:58,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:27:58,371 INFO L93 Difference]: Finished difference Result 10834 states and 17245 transitions. [2023-02-15 10:27:58,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 10:27:58,372 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 [2023-02-15 10:27:58,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:27:58,406 INFO L225 Difference]: With dead ends: 10834 [2023-02-15 10:27:58,406 INFO L226 Difference]: Without dead ends: 7785 [2023-02-15 10:27:58,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2023-02-15 10:27:58,419 INFO L413 NwaCegarLoop]: 801 mSDtfsCounter, 2172 mSDsluCounter, 1768 mSDsCounter, 0 mSdLazyCounter, 1381 mSolverCounterSat, 628 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s 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, 4.8s IncrementalHoareTripleChecker+Time [2023-02-15 10:27:58,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2248 Valid, 2569 Invalid, 2010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [628 Valid, 1381 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2023-02-15 10:27:58,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7785 states. [2023-02-15 10:27:58,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7785 to 6900. [2023-02-15 10:27:58,684 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) [2023-02-15 10:27:58,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6900 states to 6900 states and 10848 transitions. [2023-02-15 10:27:58,710 INFO L78 Accepts]: Start accepts. Automaton has 6900 states and 10848 transitions. Word has length 47 [2023-02-15 10:27:58,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:27:58,711 INFO L495 AbstractCegarLoop]: Abstraction has 6900 states and 10848 transitions. [2023-02-15 10:27:58,712 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) [2023-02-15 10:27:58,712 INFO L276 IsEmpty]: Start isEmpty. Operand 6900 states and 10848 transitions. [2023-02-15 10:27:58,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-15 10:27:58,713 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:27:58,713 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] [2023-02-15 10:27:58,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-15 10:27:58,713 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:27:58,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:27:58,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1335861569, now seen corresponding path program 1 times [2023-02-15 10:27:58,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:27:58,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458470552] [2023-02-15 10:27:58,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:27:58,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:27:58,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:27:59,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:27:59,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:27:59,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:27:59,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:27:59,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-15 10:27:59,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:27:59,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-15 10:27:59,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:27:59,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:27:59,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:27:59,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458470552] [2023-02-15 10:27:59,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458470552] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:27:59,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:27:59,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-15 10:27:59,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351598304] [2023-02-15 10:27:59,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:27:59,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 10:27:59,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:27:59,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 10:27:59,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-15 10:27:59,111 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) [2023-02-15 10:28:02,769 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 [] [2023-02-15 10:28:05,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:28:05,028 INFO L93 Difference]: Finished difference Result 7819 states and 12472 transitions. [2023-02-15 10:28:05,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-15 10:28:05,029 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 [2023-02-15 10:28:05,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:28:05,063 INFO L225 Difference]: With dead ends: 7819 [2023-02-15 10:28:05,063 INFO L226 Difference]: Without dead ends: 7813 [2023-02-15 10:28:05,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=191, Invalid=511, Unknown=0, NotChecked=0, Total=702 [2023-02-15 10:28:05,070 INFO L413 NwaCegarLoop]: 840 mSDtfsCounter, 2829 mSDsluCounter, 2145 mSDsCounter, 0 mSdLazyCounter, 2276 mSolverCounterSat, 998 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2892 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, 5.3s IncrementalHoareTripleChecker+Time [2023-02-15 10:28:05,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2892 Valid, 2985 Invalid, 3275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [998 Valid, 2276 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2023-02-15 10:28:05,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7813 states. [2023-02-15 10:28:05,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7813 to 6900. [2023-02-15 10:28:05,395 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) [2023-02-15 10:28:05,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6900 states to 6900 states and 10847 transitions. [2023-02-15 10:28:05,429 INFO L78 Accepts]: Start accepts. Automaton has 6900 states and 10847 transitions. Word has length 48 [2023-02-15 10:28:05,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:28:05,429 INFO L495 AbstractCegarLoop]: Abstraction has 6900 states and 10847 transitions. [2023-02-15 10:28:05,429 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) [2023-02-15 10:28:05,429 INFO L276 IsEmpty]: Start isEmpty. Operand 6900 states and 10847 transitions. [2023-02-15 10:28:05,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-15 10:28:05,431 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:28:05,431 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] [2023-02-15 10:28:05,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-15 10:28:05,432 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:28:05,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:28:05,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1807638448, now seen corresponding path program 1 times [2023-02-15 10:28:05,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:28:05,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966168278] [2023-02-15 10:28:05,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:28:05,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:28:05,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:28:05,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:28:05,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:28:05,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:28:05,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:28:05,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-15 10:28:05,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:28:05,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-15 10:28:05,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:28:05,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:28:05,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:28:05,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966168278] [2023-02-15 10:28:05,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966168278] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:28:05,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:28:05,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-15 10:28:05,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585982852] [2023-02-15 10:28:05,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:28:05,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 10:28:05,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:28:05,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 10:28:05,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-15 10:28:05,772 INFO L87 Difference]: Start difference. First operand 6900 states and 10847 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 5 states have internal predecessors, (41), 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) [2023-02-15 10:28:10,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-15 10:28:12,567 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-15 10:28:15,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:28:15,894 INFO L93 Difference]: Finished difference Result 7815 states and 12466 transitions. [2023-02-15 10:28:15,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-15 10:28:15,895 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 5 states have internal predecessors, (41), 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 50 [2023-02-15 10:28:15,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:28:15,959 INFO L225 Difference]: With dead ends: 7815 [2023-02-15 10:28:15,959 INFO L226 Difference]: Without dead ends: 7809 [2023-02-15 10:28:15,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=191, Invalid=511, Unknown=0, NotChecked=0, Total=702 [2023-02-15 10:28:15,964 INFO L413 NwaCegarLoop]: 840 mSDtfsCounter, 2414 mSDsluCounter, 2490 mSDsCounter, 0 mSdLazyCounter, 2808 mSolverCounterSat, 754 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2477 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, 9.4s IncrementalHoareTripleChecker+Time [2023-02-15 10:28:15,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2477 Valid, 3330 Invalid, 3564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [754 Valid, 2808 Invalid, 2 Unknown, 0 Unchecked, 9.4s Time] [2023-02-15 10:28:15,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7809 states. [2023-02-15 10:28:16,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7809 to 6900. [2023-02-15 10:28:16,290 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) [2023-02-15 10:28:16,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6900 states to 6900 states and 10846 transitions. [2023-02-15 10:28:16,315 INFO L78 Accepts]: Start accepts. Automaton has 6900 states and 10846 transitions. Word has length 50 [2023-02-15 10:28:16,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:28:16,315 INFO L495 AbstractCegarLoop]: Abstraction has 6900 states and 10846 transitions. [2023-02-15 10:28:16,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 5 states have internal predecessors, (41), 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) [2023-02-15 10:28:16,315 INFO L276 IsEmpty]: Start isEmpty. Operand 6900 states and 10846 transitions. [2023-02-15 10:28:16,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-15 10:28:16,316 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:28:16,316 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] [2023-02-15 10:28:16,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-15 10:28:16,317 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:28:16,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:28:16,317 INFO L85 PathProgramCache]: Analyzing trace with hash -376802648, now seen corresponding path program 1 times [2023-02-15 10:28:16,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:28:16,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140441692] [2023-02-15 10:28:16,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:28:16,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:28:16,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:28:16,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:28:16,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:28:16,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:28:16,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:28:16,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-15 10:28:16,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:28:16,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-15 10:28:16,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:28:16,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:28:16,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:28:16,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140441692] [2023-02-15 10:28:16,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140441692] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:28:16,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:28:16,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-15 10:28:16,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434716200] [2023-02-15 10:28:16,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:28:16,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 10:28:16,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:28:16,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 10:28:16,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-15 10:28:16,672 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) [2023-02-15 10:28:21,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-15 10:28:23,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-15 10:28:24,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:28:24,218 INFO L93 Difference]: Finished difference Result 7824 states and 12487 transitions. [2023-02-15 10:28:24,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 10:28:24,218 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 [2023-02-15 10:28:24,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:28:24,241 INFO L225 Difference]: With dead ends: 7824 [2023-02-15 10:28:24,241 INFO L226 Difference]: Without dead ends: 7807 [2023-02-15 10:28:24,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-02-15 10:28:24,248 INFO L413 NwaCegarLoop]: 575 mSDtfsCounter, 717 mSDsluCounter, 2806 mSDsCounter, 0 mSdLazyCounter, 2272 mSolverCounterSat, 242 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s 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, 7.1s IncrementalHoareTripleChecker+Time [2023-02-15 10:28:24,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [743 Valid, 3381 Invalid, 2516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 2272 Invalid, 2 Unknown, 0 Unchecked, 7.1s Time] [2023-02-15 10:28:24,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7807 states. [2023-02-15 10:28:24,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7807 to 6904. [2023-02-15 10:28:24,569 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) [2023-02-15 10:28:24,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6904 states to 6904 states and 10853 transitions. [2023-02-15 10:28:24,595 INFO L78 Accepts]: Start accepts. Automaton has 6904 states and 10853 transitions. Word has length 50 [2023-02-15 10:28:24,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:28:24,595 INFO L495 AbstractCegarLoop]: Abstraction has 6904 states and 10853 transitions. [2023-02-15 10:28:24,595 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) [2023-02-15 10:28:24,595 INFO L276 IsEmpty]: Start isEmpty. Operand 6904 states and 10853 transitions. [2023-02-15 10:28:24,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-15 10:28:24,596 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:28:24,596 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] [2023-02-15 10:28:24,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-02-15 10:28:24,596 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:28:24,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:28:24,597 INFO L85 PathProgramCache]: Analyzing trace with hash 286289769, now seen corresponding path program 1 times [2023-02-15 10:28:24,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:28:24,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889505213] [2023-02-15 10:28:24,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:28:24,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:28:24,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:28:24,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:28:24,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:28:24,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:28:24,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:28:24,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-15 10:28:24,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:28:24,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-15 10:28:24,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:28:24,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:28:24,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:28:24,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889505213] [2023-02-15 10:28:24,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889505213] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:28:24,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:28:24,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-15 10:28:24,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330194502] [2023-02-15 10:28:24,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:28:24,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 10:28:24,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:28:24,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 10:28:24,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-15 10:28:24,919 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) [2023-02-15 10:28:29,597 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-15 10:28:31,604 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-15 10:28:32,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:28:32,663 INFO L93 Difference]: Finished difference Result 7822 states and 12483 transitions. [2023-02-15 10:28:32,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 10:28:32,664 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 [2023-02-15 10:28:32,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:28:32,694 INFO L225 Difference]: With dead ends: 7822 [2023-02-15 10:28:32,694 INFO L226 Difference]: Without dead ends: 7800 [2023-02-15 10:28:32,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-02-15 10:28:32,700 INFO L413 NwaCegarLoop]: 575 mSDtfsCounter, 715 mSDsluCounter, 2806 mSDsCounter, 0 mSdLazyCounter, 2266 mSolverCounterSat, 238 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s 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, 7.3s IncrementalHoareTripleChecker+Time [2023-02-15 10:28:32,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [741 Valid, 3381 Invalid, 2506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 2266 Invalid, 2 Unknown, 0 Unchecked, 7.3s Time] [2023-02-15 10:28:32,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7800 states. [2023-02-15 10:28:33,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7800 to 6897. [2023-02-15 10:28:33,043 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) [2023-02-15 10:28:33,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6897 states to 6897 states and 10844 transitions. [2023-02-15 10:28:33,068 INFO L78 Accepts]: Start accepts. Automaton has 6897 states and 10844 transitions. Word has length 51 [2023-02-15 10:28:33,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:28:33,068 INFO L495 AbstractCegarLoop]: Abstraction has 6897 states and 10844 transitions. [2023-02-15 10:28:33,069 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) [2023-02-15 10:28:33,069 INFO L276 IsEmpty]: Start isEmpty. Operand 6897 states and 10844 transitions. [2023-02-15 10:28:33,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-15 10:28:33,071 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:28:33,071 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] [2023-02-15 10:28:33,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-02-15 10:28:33,071 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:28:33,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:28:33,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1945256571, now seen corresponding path program 1 times [2023-02-15 10:28:33,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:28:33,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858013574] [2023-02-15 10:28:33,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:28:33,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:28:33,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:28:33,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:28:33,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:28:33,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:28:33,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:28:33,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-15 10:28:33,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:28:33,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:28:33,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:28:33,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858013574] [2023-02-15 10:28:33,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858013574] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:28:33,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:28:33,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 10:28:33,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369816273] [2023-02-15 10:28:33,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:28:33,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 10:28:33,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:28:33,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 10:28:33,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 10:28:33,290 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) [2023-02-15 10:28:37,458 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 [] [2023-02-15 10:28:38,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:28:38,360 INFO L93 Difference]: Finished difference Result 13804 states and 22175 transitions. [2023-02-15 10:28:38,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 10:28:38,361 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 [2023-02-15 10:28:38,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:28:38,387 INFO L225 Difference]: With dead ends: 13804 [2023-02-15 10:28:38,387 INFO L226 Difference]: Without dead ends: 8064 [2023-02-15 10:28:38,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-15 10:28:38,419 INFO L413 NwaCegarLoop]: 625 mSDtfsCounter, 434 mSDsluCounter, 1356 mSDsCounter, 0 mSdLazyCounter, 1010 mSolverCounterSat, 211 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s 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, 4.6s IncrementalHoareTripleChecker+Time [2023-02-15 10:28:38,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [447 Valid, 1981 Invalid, 1222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 1010 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2023-02-15 10:28:38,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8064 states. [2023-02-15 10:28:38,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8064 to 7053. [2023-02-15 10:28:38,817 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) [2023-02-15 10:28:38,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7053 states to 7053 states and 11024 transitions. [2023-02-15 10:28:38,848 INFO L78 Accepts]: Start accepts. Automaton has 7053 states and 11024 transitions. Word has length 52 [2023-02-15 10:28:38,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:28:38,849 INFO L495 AbstractCegarLoop]: Abstraction has 7053 states and 11024 transitions. [2023-02-15 10:28:38,849 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) [2023-02-15 10:28:38,849 INFO L276 IsEmpty]: Start isEmpty. Operand 7053 states and 11024 transitions. [2023-02-15 10:28:38,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-15 10:28:38,850 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:28:38,850 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] [2023-02-15 10:28:38,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-02-15 10:28:38,850 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:28:38,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:28:38,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1217127572, now seen corresponding path program 1 times [2023-02-15 10:28:38,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:28:38,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286441648] [2023-02-15 10:28:38,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:28:38,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:28:38,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:28:39,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:28:39,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:28:39,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:28:39,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:28:39,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-02-15 10:28:39,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:28:39,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:28:39,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:28:39,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286441648] [2023-02-15 10:28:39,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286441648] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:28:39,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:28:39,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 10:28:39,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266808407] [2023-02-15 10:28:39,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:28:39,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 10:28:39,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:28:39,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 10:28:39,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-15 10:28:39,101 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) [2023-02-15 10:28:43,355 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 [] [2023-02-15 10:28:44,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:28:44,514 INFO L93 Difference]: Finished difference Result 8020 states and 12715 transitions. [2023-02-15 10:28:44,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 10:28:44,515 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 [2023-02-15 10:28:44,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:28:44,542 INFO L225 Difference]: With dead ends: 8020 [2023-02-15 10:28:44,542 INFO L226 Difference]: Without dead ends: 8002 [2023-02-15 10:28:44,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-02-15 10:28:44,549 INFO L413 NwaCegarLoop]: 583 mSDtfsCounter, 907 mSDsluCounter, 2093 mSDsCounter, 0 mSdLazyCounter, 1532 mSolverCounterSat, 335 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s 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, 4.9s IncrementalHoareTripleChecker+Time [2023-02-15 10:28:44,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [930 Valid, 2676 Invalid, 1868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [335 Valid, 1532 Invalid, 1 Unknown, 0 Unchecked, 4.9s Time] [2023-02-15 10:28:44,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8002 states. [2023-02-15 10:28:44,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8002 to 7051. [2023-02-15 10:28:44,907 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) [2023-02-15 10:28:44,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7051 states to 7051 states and 11020 transitions. [2023-02-15 10:28:44,937 INFO L78 Accepts]: Start accepts. Automaton has 7051 states and 11020 transitions. Word has length 53 [2023-02-15 10:28:44,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:28:44,937 INFO L495 AbstractCegarLoop]: Abstraction has 7051 states and 11020 transitions. [2023-02-15 10:28:44,937 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) [2023-02-15 10:28:44,937 INFO L276 IsEmpty]: Start isEmpty. Operand 7051 states and 11020 transitions. [2023-02-15 10:28:44,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-15 10:28:44,938 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:28:44,939 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] [2023-02-15 10:28:44,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-02-15 10:28:44,939 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:28:44,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:28:44,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1937199149, now seen corresponding path program 1 times [2023-02-15 10:28:44,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:28:44,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242746295] [2023-02-15 10:28:44,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:28:44,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:28:44,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:28:45,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:28:45,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:28:45,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:28:45,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:28:45,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:28:45,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:28:45,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242746295] [2023-02-15 10:28:45,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242746295] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:28:45,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:28:45,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 10:28:45,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996531256] [2023-02-15 10:28:45,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:28:45,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 10:28:45,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:28:45,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 10:28:45,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 10:28:45,253 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) [2023-02-15 10:28:49,387 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 [] [2023-02-15 10:28:50,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:28:50,381 INFO L93 Difference]: Finished difference Result 11721 states and 18614 transitions. [2023-02-15 10:28:50,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 10:28:50,382 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 [2023-02-15 10:28:50,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:28:50,423 INFO L225 Difference]: With dead ends: 11721 [2023-02-15 10:28:50,423 INFO L226 Difference]: Without dead ends: 7953 [2023-02-15 10:28:50,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-02-15 10:28:50,444 INFO L413 NwaCegarLoop]: 591 mSDtfsCounter, 1226 mSDsluCounter, 1168 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 311 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s 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, 4.6s IncrementalHoareTripleChecker+Time [2023-02-15 10:28:50,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1277 Valid, 1759 Invalid, 1317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 1005 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2023-02-15 10:28:50,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7953 states. [2023-02-15 10:28:50,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7953 to 7041. [2023-02-15 10:28:50,806 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) [2023-02-15 10:28:50,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7041 states to 7041 states and 10999 transitions. [2023-02-15 10:28:50,831 INFO L78 Accepts]: Start accepts. Automaton has 7041 states and 10999 transitions. Word has length 52 [2023-02-15 10:28:50,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:28:50,831 INFO L495 AbstractCegarLoop]: Abstraction has 7041 states and 10999 transitions. [2023-02-15 10:28:50,832 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) [2023-02-15 10:28:50,832 INFO L276 IsEmpty]: Start isEmpty. Operand 7041 states and 10999 transitions. [2023-02-15 10:28:50,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-15 10:28:50,837 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:28:50,838 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] [2023-02-15 10:28:50,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-02-15 10:28:50,838 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:28:50,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:28:50,838 INFO L85 PathProgramCache]: Analyzing trace with hash 872726643, now seen corresponding path program 1 times [2023-02-15 10:28:50,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:28:50,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348020008] [2023-02-15 10:28:50,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:28:50,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:28:50,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:28:51,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:28:51,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:28:51,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:28:51,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:28:51,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-15 10:28:51,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:28:51,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 10:28:51,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:28:51,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:28:51,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:28:51,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348020008] [2023-02-15 10:28:51,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348020008] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:28:51,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:28:51,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-15 10:28:51,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625807980] [2023-02-15 10:28:51,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:28:51,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 10:28:51,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:28:51,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 10:28:51,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-02-15 10:28:51,132 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) [2023-02-15 10:28:55,696 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 [] [2023-02-15 10:28:56,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:28:56,899 INFO L93 Difference]: Finished difference Result 8024 states and 12754 transitions. [2023-02-15 10:28:56,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 10:28:56,900 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 [2023-02-15 10:28:56,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:28:56,921 INFO L225 Difference]: With dead ends: 8024 [2023-02-15 10:28:56,922 INFO L226 Difference]: Without dead ends: 8008 [2023-02-15 10:28:56,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-02-15 10:28:56,927 INFO L413 NwaCegarLoop]: 579 mSDtfsCounter, 978 mSDsluCounter, 2603 mSDsCounter, 0 mSdLazyCounter, 1867 mSolverCounterSat, 430 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s 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, 5.2s IncrementalHoareTripleChecker+Time [2023-02-15 10:28:56,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1001 Valid, 3182 Invalid, 2298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [430 Valid, 1867 Invalid, 1 Unknown, 0 Unchecked, 5.2s Time] [2023-02-15 10:28:56,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8008 states. [2023-02-15 10:28:57,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8008 to 7047. [2023-02-15 10:28:57,284 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) [2023-02-15 10:28:57,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7047 states to 7047 states and 11024 transitions. [2023-02-15 10:28:57,308 INFO L78 Accepts]: Start accepts. Automaton has 7047 states and 11024 transitions. Word has length 55 [2023-02-15 10:28:57,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:28:57,308 INFO L495 AbstractCegarLoop]: Abstraction has 7047 states and 11024 transitions. [2023-02-15 10:28:57,308 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) [2023-02-15 10:28:57,308 INFO L276 IsEmpty]: Start isEmpty. Operand 7047 states and 11024 transitions. [2023-02-15 10:28:57,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-15 10:28:57,310 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:28:57,310 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] [2023-02-15 10:28:57,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-02-15 10:28:57,310 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:28:57,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:28:57,310 INFO L85 PathProgramCache]: Analyzing trace with hash 555700014, now seen corresponding path program 1 times [2023-02-15 10:28:57,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:28:57,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174871664] [2023-02-15 10:28:57,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:28:57,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:28:57,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:28:57,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:28:57,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:28:57,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:28:57,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:28:57,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:28:57,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:28:57,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174871664] [2023-02-15 10:28:57,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174871664] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:28:57,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:28:57,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 10:28:57,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429443667] [2023-02-15 10:28:57,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:28:57,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 10:28:57,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:28:57,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 10:28:57,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 10:28:57,486 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) [2023-02-15 10:29:00,873 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-15 10:29:02,946 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-15 10:29:05,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:29:05,230 INFO L93 Difference]: Finished difference Result 10992 states and 17757 transitions. [2023-02-15 10:29:05,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 10:29:05,231 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 [2023-02-15 10:29:05,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:29:05,262 INFO L225 Difference]: With dead ends: 10992 [2023-02-15 10:29:05,262 INFO L226 Difference]: Without dead ends: 10979 [2023-02-15 10:29:05,268 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 [2023-02-15 10:29:05,269 INFO L413 NwaCegarLoop]: 1030 mSDtfsCounter, 998 mSDsluCounter, 1801 mSDsCounter, 0 mSdLazyCounter, 1357 mSolverCounterSat, 276 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s 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, 7.1s IncrementalHoareTripleChecker+Time [2023-02-15 10:29:05,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1029 Valid, 2831 Invalid, 1635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 1357 Invalid, 2 Unknown, 0 Unchecked, 7.1s Time] [2023-02-15 10:29:05,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10979 states. [2023-02-15 10:29:05,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10979 to 8362. [2023-02-15 10:29:05,720 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) [2023-02-15 10:29:05,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8362 states to 8362 states and 13139 transitions. [2023-02-15 10:29:05,755 INFO L78 Accepts]: Start accepts. Automaton has 8362 states and 13139 transitions. Word has length 54 [2023-02-15 10:29:05,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:29:05,755 INFO L495 AbstractCegarLoop]: Abstraction has 8362 states and 13139 transitions. [2023-02-15 10:29:05,756 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) [2023-02-15 10:29:05,756 INFO L276 IsEmpty]: Start isEmpty. Operand 8362 states and 13139 transitions. [2023-02-15 10:29:05,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-15 10:29:05,758 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:29:05,758 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] [2023-02-15 10:29:05,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-02-15 10:29:05,758 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:29:05,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:29:05,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1129689134, now seen corresponding path program 1 times [2023-02-15 10:29:05,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:29:05,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100669849] [2023-02-15 10:29:05,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:29:05,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:29:05,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:29:06,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:29:06,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:29:06,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:29:06,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:29:06,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:29:06,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:29:06,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100669849] [2023-02-15 10:29:06,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100669849] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:29:06,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:29:06,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 10:29:06,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919401819] [2023-02-15 10:29:06,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:29:06,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 10:29:06,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:29:06,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 10:29:06,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 10:29:06,027 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) [2023-02-15 10:29:10,228 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 [] [2023-02-15 10:29:11,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:29:11,191 INFO L93 Difference]: Finished difference Result 13163 states and 20813 transitions. [2023-02-15 10:29:11,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 10:29:11,192 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 [2023-02-15 10:29:11,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:29:11,214 INFO L225 Difference]: With dead ends: 13163 [2023-02-15 10:29:11,215 INFO L226 Difference]: Without dead ends: 8839 [2023-02-15 10:29:11,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-02-15 10:29:11,231 INFO L413 NwaCegarLoop]: 590 mSDtfsCounter, 1208 mSDsluCounter, 1169 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 296 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s 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, 4.5s IncrementalHoareTripleChecker+Time [2023-02-15 10:29:11,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1259 Valid, 1759 Invalid, 1257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 960 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2023-02-15 10:29:11,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8839 states. [2023-02-15 10:29:11,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8839 to 6799. [2023-02-15 10:29:11,748 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) [2023-02-15 10:29:11,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6799 states to 6799 states and 10455 transitions. [2023-02-15 10:29:11,778 INFO L78 Accepts]: Start accepts. Automaton has 6799 states and 10455 transitions. Word has length 54 [2023-02-15 10:29:11,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:29:11,779 INFO L495 AbstractCegarLoop]: Abstraction has 6799 states and 10455 transitions. [2023-02-15 10:29:11,779 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) [2023-02-15 10:29:11,779 INFO L276 IsEmpty]: Start isEmpty. Operand 6799 states and 10455 transitions. [2023-02-15 10:29:11,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-15 10:29:11,781 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:29:11,781 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] [2023-02-15 10:29:11,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-02-15 10:29:11,781 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:29:11,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:29:11,782 INFO L85 PathProgramCache]: Analyzing trace with hash 238766756, now seen corresponding path program 1 times [2023-02-15 10:29:11,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:29:11,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054843494] [2023-02-15 10:29:11,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:29:11,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:29:11,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:29:11,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:29:11,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:29:11,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:29:11,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:29:11,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-15 10:29:11,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:29:12,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:29:12,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:29:12,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054843494] [2023-02-15 10:29:12,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054843494] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:29:12,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:29:12,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 10:29:12,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812817234] [2023-02-15 10:29:12,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:29:12,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 10:29:12,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:29:12,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 10:29:12,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-15 10:29:12,021 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) [2023-02-15 10:29:16,528 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 [] [2023-02-15 10:29:17,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:29:17,625 INFO L93 Difference]: Finished difference Result 7691 states and 11990 transitions. [2023-02-15 10:29:17,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 10:29:17,626 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 [2023-02-15 10:29:17,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:29:17,643 INFO L225 Difference]: With dead ends: 7691 [2023-02-15 10:29:17,643 INFO L226 Difference]: Without dead ends: 7673 [2023-02-15 10:29:17,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-02-15 10:29:17,648 INFO L413 NwaCegarLoop]: 586 mSDtfsCounter, 900 mSDsluCounter, 2096 mSDsCounter, 0 mSdLazyCounter, 1531 mSolverCounterSat, 332 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s 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, 5.1s IncrementalHoareTripleChecker+Time [2023-02-15 10:29:17,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [923 Valid, 2682 Invalid, 1864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 1531 Invalid, 1 Unknown, 0 Unchecked, 5.1s Time] [2023-02-15 10:29:17,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7673 states. [2023-02-15 10:29:18,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7673 to 6796. [2023-02-15 10:29:18,046 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) [2023-02-15 10:29:18,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6796 states to 6796 states and 10450 transitions. [2023-02-15 10:29:18,068 INFO L78 Accepts]: Start accepts. Automaton has 6796 states and 10450 transitions. Word has length 55 [2023-02-15 10:29:18,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:29:18,068 INFO L495 AbstractCegarLoop]: Abstraction has 6796 states and 10450 transitions. [2023-02-15 10:29:18,069 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) [2023-02-15 10:29:18,069 INFO L276 IsEmpty]: Start isEmpty. Operand 6796 states and 10450 transitions. [2023-02-15 10:29:18,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-15 10:29:18,070 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:29:18,070 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] [2023-02-15 10:29:18,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-02-15 10:29:18,070 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:29:18,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:29:18,071 INFO L85 PathProgramCache]: Analyzing trace with hash 499005845, now seen corresponding path program 1 times [2023-02-15 10:29:18,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:29:18,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388059299] [2023-02-15 10:29:18,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:29:18,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:29:18,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:29:18,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:29:18,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:29:18,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:29:18,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:29:18,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:29:18,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:29:18,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388059299] [2023-02-15 10:29:18,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388059299] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:29:18,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:29:18,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 10:29:18,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094664908] [2023-02-15 10:29:18,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:29:18,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 10:29:18,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:29:18,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 10:29:18,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 10:29:18,394 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) [2023-02-15 10:29:21,940 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 [] [2023-02-15 10:29:24,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:29:24,458 INFO L93 Difference]: Finished difference Result 9126 states and 14313 transitions. [2023-02-15 10:29:24,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 10:29:24,458 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 [2023-02-15 10:29:24,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:29:24,511 INFO L225 Difference]: With dead ends: 9126 [2023-02-15 10:29:24,512 INFO L226 Difference]: Without dead ends: 9122 [2023-02-15 10:29:24,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2023-02-15 10:29:24,515 INFO L413 NwaCegarLoop]: 975 mSDtfsCounter, 1708 mSDsluCounter, 1641 mSDsCounter, 0 mSdLazyCounter, 1436 mSolverCounterSat, 487 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s 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, 5.4s IncrementalHoareTripleChecker+Time [2023-02-15 10:29:24,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1765 Valid, 2616 Invalid, 1924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [487 Valid, 1436 Invalid, 1 Unknown, 0 Unchecked, 5.4s Time] [2023-02-15 10:29:24,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9122 states. [2023-02-15 10:29:24,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9122 to 6807. [2023-02-15 10:29:24,946 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) [2023-02-15 10:29:24,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6807 states to 6807 states and 10467 transitions. [2023-02-15 10:29:24,969 INFO L78 Accepts]: Start accepts. Automaton has 6807 states and 10467 transitions. Word has length 55 [2023-02-15 10:29:24,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:29:24,969 INFO L495 AbstractCegarLoop]: Abstraction has 6807 states and 10467 transitions. [2023-02-15 10:29:24,969 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) [2023-02-15 10:29:24,969 INFO L276 IsEmpty]: Start isEmpty. Operand 6807 states and 10467 transitions. [2023-02-15 10:29:24,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-15 10:29:24,971 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:29:24,971 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] [2023-02-15 10:29:24,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-02-15 10:29:24,971 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:29:24,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:29:24,971 INFO L85 PathProgramCache]: Analyzing trace with hash 499282675, now seen corresponding path program 1 times [2023-02-15 10:29:24,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:29:24,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15937198] [2023-02-15 10:29:24,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:29:24,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:29:25,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:29:25,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:29:25,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:29:25,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:29:25,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:29:25,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:29:25,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:29:25,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15937198] [2023-02-15 10:29:25,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15937198] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:29:25,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:29:25,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-15 10:29:25,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214371730] [2023-02-15 10:29:25,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:29:25,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 10:29:25,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:29:25,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 10:29:25,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-15 10:29:25,248 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) [2023-02-15 10:29:29,169 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 [] [2023-02-15 10:29:30,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:29:30,084 INFO L93 Difference]: Finished difference Result 7650 states and 11920 transitions. [2023-02-15 10:29:30,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 10:29:30,086 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 [2023-02-15 10:29:30,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:29:30,105 INFO L225 Difference]: With dead ends: 7650 [2023-02-15 10:29:30,105 INFO L226 Difference]: Without dead ends: 7607 [2023-02-15 10:29:30,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-02-15 10:29:30,110 INFO L413 NwaCegarLoop]: 609 mSDtfsCounter, 423 mSDsluCounter, 2955 mSDsCounter, 0 mSdLazyCounter, 1539 mSolverCounterSat, 179 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s 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, 4.3s IncrementalHoareTripleChecker+Time [2023-02-15 10:29:30,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [436 Valid, 3564 Invalid, 1719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 1539 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2023-02-15 10:29:30,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7607 states. [2023-02-15 10:29:30,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7607 to 6777. [2023-02-15 10:29:30,542 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) [2023-02-15 10:29:30,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6777 states to 6777 states and 10424 transitions. [2023-02-15 10:29:30,563 INFO L78 Accepts]: Start accepts. Automaton has 6777 states and 10424 transitions. Word has length 55 [2023-02-15 10:29:30,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:29:30,563 INFO L495 AbstractCegarLoop]: Abstraction has 6777 states and 10424 transitions. [2023-02-15 10:29:30,563 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) [2023-02-15 10:29:30,563 INFO L276 IsEmpty]: Start isEmpty. Operand 6777 states and 10424 transitions. [2023-02-15 10:29:30,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-15 10:29:30,565 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:29:30,565 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] [2023-02-15 10:29:30,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-02-15 10:29:30,565 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:29:30,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:29:30,566 INFO L85 PathProgramCache]: Analyzing trace with hash 948026652, now seen corresponding path program 1 times [2023-02-15 10:29:30,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:29:30,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661945331] [2023-02-15 10:29:30,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:29:30,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:29:30,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:29:30,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:29:30,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:29:30,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:29:30,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:29:30,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-15 10:29:30,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:29:30,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-02-15 10:29:30,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:29:30,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:29:30,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:29:30,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661945331] [2023-02-15 10:29:30,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661945331] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:29:30,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:29:30,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-15 10:29:30,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912514964] [2023-02-15 10:29:30,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:29:30,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 10:29:30,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:29:30,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 10:29:30,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-02-15 10:29:30,880 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) [2023-02-15 10:29:35,152 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 [] [2023-02-15 10:29:36,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:29:36,359 INFO L93 Difference]: Finished difference Result 13421 states and 21123 transitions. [2023-02-15 10:29:36,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 10:29:36,360 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 [2023-02-15 10:29:36,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:29:36,377 INFO L225 Difference]: With dead ends: 13421 [2023-02-15 10:29:36,377 INFO L226 Difference]: Without dead ends: 7857 [2023-02-15 10:29:36,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2023-02-15 10:29:36,392 INFO L413 NwaCegarLoop]: 558 mSDtfsCounter, 401 mSDsluCounter, 2420 mSDsCounter, 0 mSdLazyCounter, 1791 mSolverCounterSat, 208 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s 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, 4.8s IncrementalHoareTripleChecker+Time [2023-02-15 10:29:36,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 2978 Invalid, 2000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 1791 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2023-02-15 10:29:36,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7857 states. [2023-02-15 10:29:36,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7857 to 6853. [2023-02-15 10:29:36,808 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) [2023-02-15 10:29:36,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6853 states to 6853 states and 10551 transitions. [2023-02-15 10:29:36,834 INFO L78 Accepts]: Start accepts. Automaton has 6853 states and 10551 transitions. Word has length 60 [2023-02-15 10:29:36,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:29:36,835 INFO L495 AbstractCegarLoop]: Abstraction has 6853 states and 10551 transitions. [2023-02-15 10:29:36,835 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) [2023-02-15 10:29:36,835 INFO L276 IsEmpty]: Start isEmpty. Operand 6853 states and 10551 transitions. [2023-02-15 10:29:36,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-02-15 10:29:36,837 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:29:36,837 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] [2023-02-15 10:29:36,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-02-15 10:29:36,837 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:29:36,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:29:36,837 INFO L85 PathProgramCache]: Analyzing trace with hash -749476623, now seen corresponding path program 1 times [2023-02-15 10:29:36,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:29:36,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43757229] [2023-02-15 10:29:36,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:29:36,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:29:36,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:29:37,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:29:37,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:29:37,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:29:37,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:29:37,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-15 10:29:37,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:29:37,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-15 10:29:37,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:29:37,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:29:37,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:29:37,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43757229] [2023-02-15 10:29:37,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43757229] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:29:37,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:29:37,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-02-15 10:29:37,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575699816] [2023-02-15 10:29:37,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:29:37,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 10:29:37,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:29:37,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 10:29:37,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-02-15 10:29:37,343 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) [2023-02-15 10:29:41,948 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 [] [2023-02-15 10:29:43,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:29:43,311 INFO L93 Difference]: Finished difference Result 7755 states and 12177 transitions. [2023-02-15 10:29:43,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-15 10:29:43,312 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 [2023-02-15 10:29:43,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:29:43,329 INFO L225 Difference]: With dead ends: 7755 [2023-02-15 10:29:43,329 INFO L226 Difference]: Without dead ends: 7741 [2023-02-15 10:29:43,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-02-15 10:29:43,334 INFO L413 NwaCegarLoop]: 524 mSDtfsCounter, 952 mSDsluCounter, 3500 mSDsCounter, 0 mSdLazyCounter, 3004 mSolverCounterSat, 426 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s 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 [2023-02-15 10:29:43,335 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] [2023-02-15 10:29:43,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7741 states. [2023-02-15 10:29:43,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7741 to 6855. [2023-02-15 10:29:43,748 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) [2023-02-15 10:29:43,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6855 states to 6855 states and 10567 transitions. [2023-02-15 10:29:43,768 INFO L78 Accepts]: Start accepts. Automaton has 6855 states and 10567 transitions. Word has length 62 [2023-02-15 10:29:43,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:29:43,769 INFO L495 AbstractCegarLoop]: Abstraction has 6855 states and 10567 transitions. [2023-02-15 10:29:43,769 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) [2023-02-15 10:29:43,769 INFO L276 IsEmpty]: Start isEmpty. Operand 6855 states and 10567 transitions. [2023-02-15 10:29:43,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-02-15 10:29:43,770 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:29:43,771 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] [2023-02-15 10:29:43,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-02-15 10:29:43,771 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:29:43,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:29:43,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1416668636, now seen corresponding path program 1 times [2023-02-15 10:29:43,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:29:43,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397476137] [2023-02-15 10:29:43,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:29:43,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:29:43,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:29:43,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:29:43,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:29:43,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:29:43,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:29:43,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-15 10:29:43,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:29:43,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 10:29:43,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:29:44,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:29:44,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:29:44,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-02-15 10:29:44,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:29:44,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:29:44,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:29:44,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397476137] [2023-02-15 10:29:44,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397476137] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:29:44,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:29:44,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 10:29:44,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198329879] [2023-02-15 10:29:44,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:29:44,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 10:29:44,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:29:44,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 10:29:44,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-15 10:29:44,029 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) [2023-02-15 10:29:48,235 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-15 10:29:50,240 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-15 10:29:53,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:29:53,216 INFO L93 Difference]: Finished difference Result 10875 states and 17003 transitions. [2023-02-15 10:29:53,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 10:29:53,216 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 [2023-02-15 10:29:53,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:29:53,240 INFO L225 Difference]: With dead ends: 10875 [2023-02-15 10:29:53,241 INFO L226 Difference]: Without dead ends: 7624 [2023-02-15 10:29:53,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2023-02-15 10:29:53,249 INFO L413 NwaCegarLoop]: 948 mSDtfsCounter, 965 mSDsluCounter, 1881 mSDsCounter, 0 mSdLazyCounter, 1901 mSolverCounterSat, 347 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s 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, 8.5s IncrementalHoareTripleChecker+Time [2023-02-15 10:29:53,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1008 Valid, 2829 Invalid, 2250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 1901 Invalid, 2 Unknown, 0 Unchecked, 8.5s Time] [2023-02-15 10:29:53,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7624 states. [2023-02-15 10:29:53,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7624 to 6723. [2023-02-15 10:29:53,620 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) [2023-02-15 10:29:53,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6723 states to 6723 states and 10334 transitions. [2023-02-15 10:29:53,639 INFO L78 Accepts]: Start accepts. Automaton has 6723 states and 10334 transitions. Word has length 65 [2023-02-15 10:29:53,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:29:53,639 INFO L495 AbstractCegarLoop]: Abstraction has 6723 states and 10334 transitions. [2023-02-15 10:29:53,639 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) [2023-02-15 10:29:53,639 INFO L276 IsEmpty]: Start isEmpty. Operand 6723 states and 10334 transitions. [2023-02-15 10:29:53,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-02-15 10:29:53,641 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:29:53,641 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] [2023-02-15 10:29:53,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-02-15 10:29:53,641 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:29:53,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:29:53,642 INFO L85 PathProgramCache]: Analyzing trace with hash -340114262, now seen corresponding path program 1 times [2023-02-15 10:29:53,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:29:53,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198791490] [2023-02-15 10:29:53,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:29:53,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:29:53,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:29:53,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:29:53,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:29:53,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:29:53,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:29:53,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-15 10:29:53,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:29:53,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:29:53,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:29:53,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-02-15 10:29:53,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:29:53,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:29:53,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:29:53,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198791490] [2023-02-15 10:29:53,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198791490] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:29:53,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:29:53,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 10:29:53,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747870587] [2023-02-15 10:29:53,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:29:53,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 10:29:53,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:29:53,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 10:29:53,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 10:29:53,914 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) [2023-02-15 10:29:57,974 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 [] [2023-02-15 10:29:58,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:29:58,797 INFO L93 Difference]: Finished difference Result 13105 states and 20530 transitions. [2023-02-15 10:29:58,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 10:29:58,798 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 [2023-02-15 10:29:58,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:29:58,814 INFO L225 Difference]: With dead ends: 13105 [2023-02-15 10:29:58,815 INFO L226 Difference]: Without dead ends: 7568 [2023-02-15 10:29:58,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-15 10:29:58,828 INFO L413 NwaCegarLoop]: 571 mSDtfsCounter, 466 mSDsluCounter, 1159 mSDsCounter, 0 mSdLazyCounter, 906 mSolverCounterSat, 265 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s 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, 4.3s IncrementalHoareTripleChecker+Time [2023-02-15 10:29:58,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [479 Valid, 1730 Invalid, 1172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 906 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2023-02-15 10:29:58,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7568 states. [2023-02-15 10:29:59,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7568 to 6629. [2023-02-15 10:29:59,261 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) [2023-02-15 10:29:59,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6629 states to 6629 states and 10199 transitions. [2023-02-15 10:29:59,287 INFO L78 Accepts]: Start accepts. Automaton has 6629 states and 10199 transitions. Word has length 66 [2023-02-15 10:29:59,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:29:59,287 INFO L495 AbstractCegarLoop]: Abstraction has 6629 states and 10199 transitions. [2023-02-15 10:29:59,288 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) [2023-02-15 10:29:59,288 INFO L276 IsEmpty]: Start isEmpty. Operand 6629 states and 10199 transitions. [2023-02-15 10:29:59,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-02-15 10:29:59,293 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:29:59,294 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] [2023-02-15 10:29:59,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-02-15 10:29:59,294 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:29:59,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:29:59,294 INFO L85 PathProgramCache]: Analyzing trace with hash 437037204, now seen corresponding path program 1 times [2023-02-15 10:29:59,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:29:59,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756977010] [2023-02-15 10:29:59,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:29:59,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:29:59,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:29:59,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:29:59,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:29:59,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:29:59,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:29:59,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-02-15 10:29:59,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:29:59,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:29:59,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:29:59,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756977010] [2023-02-15 10:29:59,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756977010] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:29:59,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:29:59,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-15 10:29:59,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818656471] [2023-02-15 10:29:59,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:29:59,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 10:29:59,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:29:59,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 10:29:59,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-02-15 10:29:59,611 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) [2023-02-15 10:30:05,237 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 [] [2023-02-15 10:30:06,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:30:06,678 INFO L93 Difference]: Finished difference Result 7477 states and 11670 transitions. [2023-02-15 10:30:06,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 10:30:06,678 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 [2023-02-15 10:30:06,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:30:06,697 INFO L225 Difference]: With dead ends: 7477 [2023-02-15 10:30:06,698 INFO L226 Difference]: Without dead ends: 7459 [2023-02-15 10:30:06,702 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 [2023-02-15 10:30:06,703 INFO L413 NwaCegarLoop]: 531 mSDtfsCounter, 902 mSDsluCounter, 3120 mSDsCounter, 0 mSdLazyCounter, 2630 mSolverCounterSat, 331 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s 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, 6.4s IncrementalHoareTripleChecker+Time [2023-02-15 10:30:06,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [926 Valid, 3651 Invalid, 2962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [331 Valid, 2630 Invalid, 1 Unknown, 0 Unchecked, 6.4s Time] [2023-02-15 10:30:06,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7459 states. [2023-02-15 10:30:07,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7459 to 6625. [2023-02-15 10:30:07,107 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) [2023-02-15 10:30:07,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6625 states to 6625 states and 10193 transitions. [2023-02-15 10:30:07,126 INFO L78 Accepts]: Start accepts. Automaton has 6625 states and 10193 transitions. Word has length 65 [2023-02-15 10:30:07,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:30:07,126 INFO L495 AbstractCegarLoop]: Abstraction has 6625 states and 10193 transitions. [2023-02-15 10:30:07,126 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) [2023-02-15 10:30:07,126 INFO L276 IsEmpty]: Start isEmpty. Operand 6625 states and 10193 transitions. [2023-02-15 10:30:07,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-15 10:30:07,127 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:30:07,128 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] [2023-02-15 10:30:07,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-02-15 10:30:07,129 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:30:07,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:30:07,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1869722635, now seen corresponding path program 1 times [2023-02-15 10:30:07,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:30:07,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513906365] [2023-02-15 10:30:07,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:30:07,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:30:07,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:30:07,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:30:07,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:30:07,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:30:07,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:30:07,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-15 10:30:07,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:30:07,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 10:30:07,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:30:07,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:30:07,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:30:07,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513906365] [2023-02-15 10:30:07,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513906365] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:30:07,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:30:07,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 10:30:07,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225779483] [2023-02-15 10:30:07,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:30:07,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 10:30:07,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:30:07,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 10:30:07,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-02-15 10:30:07,372 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) [2023-02-15 10:30:12,131 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 [] [2023-02-15 10:30:13,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:30:13,273 INFO L93 Difference]: Finished difference Result 10441 states and 16350 transitions. [2023-02-15 10:30:13,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 10:30:13,273 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 [2023-02-15 10:30:13,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:30:13,291 INFO L225 Difference]: With dead ends: 10441 [2023-02-15 10:30:13,291 INFO L226 Difference]: Without dead ends: 7793 [2023-02-15 10:30:13,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2023-02-15 10:30:13,301 INFO L413 NwaCegarLoop]: 520 mSDtfsCounter, 954 mSDsluCounter, 1322 mSDsCounter, 0 mSdLazyCounter, 1288 mSolverCounterSat, 358 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s 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, 5.2s IncrementalHoareTripleChecker+Time [2023-02-15 10:30:13,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [976 Valid, 1842 Invalid, 1647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 1288 Invalid, 1 Unknown, 0 Unchecked, 5.2s Time] [2023-02-15 10:30:13,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7793 states. [2023-02-15 10:30:13,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7793 to 6847. [2023-02-15 10:30:13,749 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) [2023-02-15 10:30:13,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6847 states to 6847 states and 10500 transitions. [2023-02-15 10:30:13,769 INFO L78 Accepts]: Start accepts. Automaton has 6847 states and 10500 transitions. Word has length 67 [2023-02-15 10:30:13,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:30:13,770 INFO L495 AbstractCegarLoop]: Abstraction has 6847 states and 10500 transitions. [2023-02-15 10:30:13,770 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) [2023-02-15 10:30:13,770 INFO L276 IsEmpty]: Start isEmpty. Operand 6847 states and 10500 transitions. [2023-02-15 10:30:13,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-02-15 10:30:13,784 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:30:13,784 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] [2023-02-15 10:30:13,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-02-15 10:30:13,784 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:30:13,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:30:13,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1466440038, now seen corresponding path program 1 times [2023-02-15 10:30:13,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:30:13,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649304499] [2023-02-15 10:30:13,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:30:13,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:30:13,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:30:13,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:30:13,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:30:13,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:30:13,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:30:13,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-15 10:30:13,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:30:13,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-02-15 10:30:13,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:30:14,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-02-15 10:30:14,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:30:14,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:30:14,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:30:14,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649304499] [2023-02-15 10:30:14,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649304499] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:30:14,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:30:14,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 10:30:14,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954737774] [2023-02-15 10:30:14,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:30:14,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 10:30:14,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:30:14,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 10:30:14,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-15 10:30:14,043 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) [2023-02-15 10:30:17,982 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 [] [2023-02-15 10:30:20,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:30:20,765 INFO L93 Difference]: Finished difference Result 9490 states and 14566 transitions. [2023-02-15 10:30:20,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-15 10:30:20,766 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 [2023-02-15 10:30:20,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:30:20,778 INFO L225 Difference]: With dead ends: 9490 [2023-02-15 10:30:20,778 INFO L226 Difference]: Without dead ends: 5437 [2023-02-15 10:30:20,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2023-02-15 10:30:20,787 INFO L413 NwaCegarLoop]: 757 mSDtfsCounter, 2908 mSDsluCounter, 1946 mSDsCounter, 0 mSdLazyCounter, 2165 mSolverCounterSat, 796 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s 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, 6.1s IncrementalHoareTripleChecker+Time [2023-02-15 10:30:20,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2967 Valid, 2703 Invalid, 2962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [796 Valid, 2165 Invalid, 1 Unknown, 0 Unchecked, 6.1s Time] [2023-02-15 10:30:20,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5437 states. [2023-02-15 10:30:21,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5437 to 4456. [2023-02-15 10:30:21,095 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) [2023-02-15 10:30:21,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4456 states to 4456 states and 6623 transitions. [2023-02-15 10:30:21,105 INFO L78 Accepts]: Start accepts. Automaton has 4456 states and 6623 transitions. Word has length 69 [2023-02-15 10:30:21,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:30:21,105 INFO L495 AbstractCegarLoop]: Abstraction has 4456 states and 6623 transitions. [2023-02-15 10:30:21,105 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) [2023-02-15 10:30:21,106 INFO L276 IsEmpty]: Start isEmpty. Operand 4456 states and 6623 transitions. [2023-02-15 10:30:21,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-15 10:30:21,107 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:30:21,107 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] [2023-02-15 10:30:21,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-02-15 10:30:21,108 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:30:21,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:30:21,108 INFO L85 PathProgramCache]: Analyzing trace with hash -677342089, now seen corresponding path program 1 times [2023-02-15 10:30:21,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:30:21,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259871687] [2023-02-15 10:30:21,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:30:21,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:30:21,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:30:21,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:30:21,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:30:21,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:30:21,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:30:21,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-15 10:30:21,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:30:21,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-15 10:30:21,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:30:21,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:30:21,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:30:21,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259871687] [2023-02-15 10:30:21,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259871687] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:30:21,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:30:21,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 10:30:21,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753490220] [2023-02-15 10:30:21,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:30:21,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 10:30:21,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:30:21,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 10:30:21,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-02-15 10:30:21,340 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) [2023-02-15 10:30:25,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-15 10:30:27,733 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-15 10:30:29,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:30:29,016 INFO L93 Difference]: Finished difference Result 7882 states and 11879 transitions. [2023-02-15 10:30:29,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 10:30:29,017 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 [2023-02-15 10:30:29,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:30:29,028 INFO L225 Difference]: With dead ends: 7882 [2023-02-15 10:30:29,028 INFO L226 Difference]: Without dead ends: 5395 [2023-02-15 10:30:29,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2023-02-15 10:30:29,035 INFO L413 NwaCegarLoop]: 529 mSDtfsCounter, 837 mSDsluCounter, 1604 mSDsCounter, 0 mSdLazyCounter, 1694 mSolverCounterSat, 140 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s 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, 7.1s IncrementalHoareTripleChecker+Time [2023-02-15 10:30:29,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [860 Valid, 2133 Invalid, 1836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1694 Invalid, 2 Unknown, 0 Unchecked, 7.1s Time] [2023-02-15 10:30:29,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5395 states. [2023-02-15 10:30:29,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5395 to 4432. [2023-02-15 10:30:29,324 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) [2023-02-15 10:30:29,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4432 states to 4432 states and 6593 transitions. [2023-02-15 10:30:29,333 INFO L78 Accepts]: Start accepts. Automaton has 4432 states and 6593 transitions. Word has length 68 [2023-02-15 10:30:29,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:30:29,333 INFO L495 AbstractCegarLoop]: Abstraction has 4432 states and 6593 transitions. [2023-02-15 10:30:29,334 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) [2023-02-15 10:30:29,334 INFO L276 IsEmpty]: Start isEmpty. Operand 4432 states and 6593 transitions. [2023-02-15 10:30:29,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-15 10:30:29,335 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:30:29,335 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] [2023-02-15 10:30:29,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-02-15 10:30:29,335 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:30:29,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:30:29,336 INFO L85 PathProgramCache]: Analyzing trace with hash -554272668, now seen corresponding path program 1 times [2023-02-15 10:30:29,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:30:29,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729266060] [2023-02-15 10:30:29,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:30:29,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:30:29,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:30:29,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:30:29,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:30:29,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:30:29,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:30:29,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-15 10:30:29,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:30:29,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-02-15 10:30:29,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:30:29,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-02-15 10:30:29,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:30:29,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2023-02-15 10:30:29,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:30:29,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:30:29,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:30:29,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729266060] [2023-02-15 10:30:29,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729266060] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:30:29,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:30:29,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 10:30:29,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344828601] [2023-02-15 10:30:29,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:30:29,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 10:30:29,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:30:29,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 10:30:29,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-15 10:30:29,559 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) [2023-02-15 10:30:33,733 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 [] [2023-02-15 10:30:35,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:30:35,020 INFO L93 Difference]: Finished difference Result 7928 states and 11993 transitions. [2023-02-15 10:30:35,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-15 10:30:35,020 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 [2023-02-15 10:30:35,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:30:35,032 INFO L225 Difference]: With dead ends: 7928 [2023-02-15 10:30:35,033 INFO L226 Difference]: Without dead ends: 5377 [2023-02-15 10:30:35,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2023-02-15 10:30:35,040 INFO L413 NwaCegarLoop]: 507 mSDtfsCounter, 1469 mSDsluCounter, 1585 mSDsCounter, 0 mSdLazyCounter, 1394 mSolverCounterSat, 539 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s 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, 4.8s IncrementalHoareTripleChecker+Time [2023-02-15 10:30:35,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1479 Valid, 2092 Invalid, 1934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [539 Valid, 1394 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2023-02-15 10:30:35,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5377 states. [2023-02-15 10:30:35,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5377 to 4423. [2023-02-15 10:30:35,444 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) [2023-02-15 10:30:35,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4423 states to 4423 states and 6570 transitions. [2023-02-15 10:30:35,454 INFO L78 Accepts]: Start accepts. Automaton has 4423 states and 6570 transitions. Word has length 71 [2023-02-15 10:30:35,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:30:35,454 INFO L495 AbstractCegarLoop]: Abstraction has 4423 states and 6570 transitions. [2023-02-15 10:30:35,454 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) [2023-02-15 10:30:35,454 INFO L276 IsEmpty]: Start isEmpty. Operand 4423 states and 6570 transitions. [2023-02-15 10:30:35,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-15 10:30:35,463 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:30:35,463 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] [2023-02-15 10:30:35,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-02-15 10:30:35,463 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:30:35,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:30:35,464 INFO L85 PathProgramCache]: Analyzing trace with hash 827121083, now seen corresponding path program 1 times [2023-02-15 10:30:35,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:30:35,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167355333] [2023-02-15 10:30:35,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:30:35,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:30:35,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:30:35,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:30:35,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:30:35,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:30:35,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:30:35,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-02-15 10:30:35,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:30:35,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-15 10:30:35,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:30:35,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:30:35,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:30:35,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167355333] [2023-02-15 10:30:35,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167355333] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:30:35,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:30:35,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-15 10:30:35,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339656809] [2023-02-15 10:30:35,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:30:35,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 10:30:35,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:30:35,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 10:30:35,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-15 10:30:35,868 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) [2023-02-15 10:30:40,176 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 [] [2023-02-15 10:30:41,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:30:41,289 INFO L93 Difference]: Finished difference Result 5300 states and 8024 transitions. [2023-02-15 10:30:41,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 10:30:41,290 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 [2023-02-15 10:30:41,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:30:41,301 INFO L225 Difference]: With dead ends: 5300 [2023-02-15 10:30:41,301 INFO L226 Difference]: Without dead ends: 5280 [2023-02-15 10:30:41,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-02-15 10:30:41,305 INFO L413 NwaCegarLoop]: 533 mSDtfsCounter, 993 mSDsluCounter, 2337 mSDsCounter, 0 mSdLazyCounter, 1818 mSolverCounterSat, 419 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1016 SdHoareTripleChecker+Valid, 2870 SdHoareTripleChecker+Invalid, 2238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 419 IncrementalHoareTripleChecker+Valid, 1818 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2023-02-15 10:30:41,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1016 Valid, 2870 Invalid, 2238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [419 Valid, 1818 Invalid, 1 Unknown, 0 Unchecked, 4.9s Time] [2023-02-15 10:30:41,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5280 states. [2023-02-15 10:30:41,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5280 to 4422. [2023-02-15 10:30:41,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4422 states, 3755 states have (on average 1.455925432756325) internal successors, (5467), 3876 states have internal predecessors, (5467), 463 states have call successors, (463), 161 states have call predecessors, (463), 203 states have return successors, (637), 399 states have call predecessors, (637), 446 states have call successors, (637) [2023-02-15 10:30:41,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4422 states to 4422 states and 6567 transitions. [2023-02-15 10:30:41,674 INFO L78 Accepts]: Start accepts. Automaton has 4422 states and 6567 transitions. Word has length 68 [2023-02-15 10:30:41,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:30:41,674 INFO L495 AbstractCegarLoop]: Abstraction has 4422 states and 6567 transitions. [2023-02-15 10:30:41,674 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) [2023-02-15 10:30:41,674 INFO L276 IsEmpty]: Start isEmpty. Operand 4422 states and 6567 transitions. [2023-02-15 10:30:41,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-02-15 10:30:41,676 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:30:41,676 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] [2023-02-15 10:30:41,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-02-15 10:30:41,676 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:30:41,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:30:41,676 INFO L85 PathProgramCache]: Analyzing trace with hash 463590116, now seen corresponding path program 1 times [2023-02-15 10:30:41,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:30:41,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463113789] [2023-02-15 10:30:41,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:30:41,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:30:41,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:30:41,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:30:41,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:30:41,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:30:41,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:30:41,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-15 10:30:41,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:30:42,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-15 10:30:42,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:30:42,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:30:42,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:30:42,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463113789] [2023-02-15 10:30:42,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463113789] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:30:42,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:30:42,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-15 10:30:42,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598921188] [2023-02-15 10:30:42,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:30:42,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 10:30:42,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:30:42,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 10:30:42,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-02-15 10:30:42,142 INFO L87 Difference]: Start difference. First operand 4422 states and 6567 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) [2023-02-15 10:30:46,855 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 [] [2023-02-15 10:30:48,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:30:48,126 INFO L93 Difference]: Finished difference Result 5362 states and 8158 transitions. [2023-02-15 10:30:48,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-15 10:30:48,126 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 [2023-02-15 10:30:48,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:30:48,135 INFO L225 Difference]: With dead ends: 5362 [2023-02-15 10:30:48,136 INFO L226 Difference]: Without dead ends: 5346 [2023-02-15 10:30:48,137 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 [2023-02-15 10:30:48,138 INFO L413 NwaCegarLoop]: 526 mSDtfsCounter, 998 mSDsluCounter, 2763 mSDsCounter, 0 mSdLazyCounter, 2228 mSolverCounterSat, 427 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1021 SdHoareTripleChecker+Valid, 3289 SdHoareTripleChecker+Invalid, 2656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 427 IncrementalHoareTripleChecker+Valid, 2228 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2023-02-15 10:30:48,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1021 Valid, 3289 Invalid, 2656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [427 Valid, 2228 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2023-02-15 10:30:48,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5346 states. [2023-02-15 10:30:48,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5346 to 4427. [2023-02-15 10:30:48,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4427 states, 3758 states have (on average 1.456093666844066) internal successors, (5472), 3880 states have internal predecessors, (5472), 465 states have call successors, (465), 161 states have call predecessors, (465), 203 states have return successors, (639), 400 states have call predecessors, (639), 448 states have call successors, (639) [2023-02-15 10:30:48,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4427 states to 4427 states and 6576 transitions. [2023-02-15 10:30:48,460 INFO L78 Accepts]: Start accepts. Automaton has 4427 states and 6576 transitions. Word has length 69 [2023-02-15 10:30:48,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:30:48,460 INFO L495 AbstractCegarLoop]: Abstraction has 4427 states and 6576 transitions. [2023-02-15 10:30:48,460 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) [2023-02-15 10:30:48,460 INFO L276 IsEmpty]: Start isEmpty. Operand 4427 states and 6576 transitions. [2023-02-15 10:30:48,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-02-15 10:30:48,461 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:30:48,462 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 10:30:48,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-02-15 10:30:48,462 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:30:48,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:30:48,462 INFO L85 PathProgramCache]: Analyzing trace with hash -669900528, now seen corresponding path program 1 times [2023-02-15 10:30:48,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:30:48,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103129927] [2023-02-15 10:30:48,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:30:48,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:30:48,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:30:48,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:30:48,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:30:48,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:30:48,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:30:48,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-15 10:30:48,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:30:48,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-02-15 10:30:48,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:30:48,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:30:48,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:30:48,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103129927] [2023-02-15 10:30:48,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103129927] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:30:48,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:30:48,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-15 10:30:48,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192731558] [2023-02-15 10:30:48,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:30:48,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 10:30:48,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:30:48,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 10:30:48,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-02-15 10:30:48,878 INFO L87 Difference]: Start difference. First operand 4427 states and 6576 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) [2023-02-15 10:30:53,118 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 [] [2023-02-15 10:30:55,123 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 [] [2023-02-15 10:30:56,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:30:56,247 INFO L93 Difference]: Finished difference Result 9525 states and 14480 transitions. [2023-02-15 10:30:56,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 10:30:56,248 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 [2023-02-15 10:30:56,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:30:56,261 INFO L225 Difference]: With dead ends: 9525 [2023-02-15 10:30:56,262 INFO L226 Difference]: Without dead ends: 5473 [2023-02-15 10:30:56,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-02-15 10:30:56,270 INFO L413 NwaCegarLoop]: 567 mSDtfsCounter, 405 mSDsluCounter, 1956 mSDsCounter, 0 mSdLazyCounter, 1453 mSolverCounterSat, 94 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 2523 SdHoareTripleChecker+Invalid, 1549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1453 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2023-02-15 10:30:56,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 2523 Invalid, 1549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1453 Invalid, 2 Unknown, 0 Unchecked, 6.8s Time] [2023-02-15 10:30:56,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5473 states. [2023-02-15 10:30:56,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5473 to 4455. [2023-02-15 10:30:56,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4455 states, 3786 states have (on average 1.4527205493924986) internal successors, (5500), 3908 states have internal predecessors, (5500), 465 states have call successors, (465), 161 states have call predecessors, (465), 203 states have return successors, (639), 400 states have call predecessors, (639), 448 states have call successors, (639) [2023-02-15 10:30:56,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4455 states to 4455 states and 6604 transitions. [2023-02-15 10:30:56,622 INFO L78 Accepts]: Start accepts. Automaton has 4455 states and 6604 transitions. Word has length 69 [2023-02-15 10:30:56,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:30:56,622 INFO L495 AbstractCegarLoop]: Abstraction has 4455 states and 6604 transitions. [2023-02-15 10:30:56,623 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) [2023-02-15 10:30:56,623 INFO L276 IsEmpty]: Start isEmpty. Operand 4455 states and 6604 transitions. [2023-02-15 10:30:56,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-02-15 10:30:56,624 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:30:56,624 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] [2023-02-15 10:30:56,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-02-15 10:30:56,624 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:30:56,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:30:56,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1685614928, now seen corresponding path program 1 times [2023-02-15 10:30:56,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:30:56,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56116250] [2023-02-15 10:30:56,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:30:56,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:30:56,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:30:56,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:30:56,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:30:56,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:30:56,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:30:56,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-15 10:30:56,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:30:57,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-02-15 10:30:57,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:30:57,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:30:57,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:30:57,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56116250] [2023-02-15 10:30:57,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56116250] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:30:57,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:30:57,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-15 10:30:57,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304878260] [2023-02-15 10:30:57,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:30:57,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 10:30:57,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:30:57,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 10:30:57,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-15 10:30:57,089 INFO L87 Difference]: Start difference. First operand 4455 states and 6604 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) [2023-02-15 10:31:00,946 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 [] [2023-02-15 10:31:02,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:31:02,010 INFO L93 Difference]: Finished difference Result 9445 states and 14286 transitions. [2023-02-15 10:31:02,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 10:31:02,011 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 [2023-02-15 10:31:02,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:31:02,023 INFO L225 Difference]: With dead ends: 9445 [2023-02-15 10:31:02,023 INFO L226 Difference]: Without dead ends: 5384 [2023-02-15 10:31:02,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-02-15 10:31:02,033 INFO L413 NwaCegarLoop]: 550 mSDtfsCounter, 570 mSDsluCounter, 2601 mSDsCounter, 0 mSdLazyCounter, 1678 mSolverCounterSat, 366 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 584 SdHoareTripleChecker+Valid, 3151 SdHoareTripleChecker+Invalid, 2045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 366 IncrementalHoareTripleChecker+Valid, 1678 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-02-15 10:31:02,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [584 Valid, 3151 Invalid, 2045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [366 Valid, 1678 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2023-02-15 10:31:02,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5384 states. [2023-02-15 10:31:02,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5384 to 4434. [2023-02-15 10:31:02,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4434 states, 3772 states have (on average 1.4544008483563096) internal successors, (5486), 3894 states have internal predecessors, (5486), 465 states have call successors, (465), 161 states have call predecessors, (465), 196 states have return successors, (594), 393 states have call predecessors, (594), 448 states have call successors, (594) [2023-02-15 10:31:02,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4434 states to 4434 states and 6545 transitions. [2023-02-15 10:31:02,408 INFO L78 Accepts]: Start accepts. Automaton has 4434 states and 6545 transitions. Word has length 69 [2023-02-15 10:31:02,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:31:02,409 INFO L495 AbstractCegarLoop]: Abstraction has 4434 states and 6545 transitions. [2023-02-15 10:31:02,409 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) [2023-02-15 10:31:02,409 INFO L276 IsEmpty]: Start isEmpty. Operand 4434 states and 6545 transitions. [2023-02-15 10:31:02,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-15 10:31:02,410 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:31:02,411 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] [2023-02-15 10:31:02,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-02-15 10:31:02,411 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:31:02,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:31:02,411 INFO L85 PathProgramCache]: Analyzing trace with hash 277949588, now seen corresponding path program 1 times [2023-02-15 10:31:02,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:31:02,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72354229] [2023-02-15 10:31:02,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:31:02,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:31:02,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:31:02,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:31:02,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:31:02,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:31:02,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:31:02,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-15 10:31:02,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:31:02,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-02-15 10:31:02,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:31:02,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-15 10:31:02,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:31:02,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:31:02,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:31:02,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72354229] [2023-02-15 10:31:02,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72354229] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:31:02,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:31:02,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-02-15 10:31:02,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359399630] [2023-02-15 10:31:02,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:31:02,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 10:31:02,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:31:02,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 10:31:02,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-02-15 10:31:02,874 INFO L87 Difference]: Start difference. First operand 4434 states and 6545 transitions. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 5 states have internal predecessors, (60), 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) [2023-02-15 10:31:08,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-15 10:31:10,906 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-02-15 10:31:12,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 10:31:12,508 INFO L93 Difference]: Finished difference Result 8059 states and 12189 transitions. [2023-02-15 10:31:12,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-15 10:31:12,508 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 5 states have internal predecessors, (60), 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 71 [2023-02-15 10:31:12,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 10:31:12,520 INFO L225 Difference]: With dead ends: 8059 [2023-02-15 10:31:12,520 INFO L226 Difference]: Without dead ends: 5579 [2023-02-15 10:31:12,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2023-02-15 10:31:12,526 INFO L413 NwaCegarLoop]: 527 mSDtfsCounter, 863 mSDsluCounter, 3644 mSDsCounter, 0 mSdLazyCounter, 3169 mSolverCounterSat, 244 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 886 SdHoareTripleChecker+Valid, 4171 SdHoareTripleChecker+Invalid, 3415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 3169 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2023-02-15 10:31:12,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [886 Valid, 4171 Invalid, 3415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 3169 Invalid, 2 Unknown, 0 Unchecked, 8.9s Time] [2023-02-15 10:31:12,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5579 states. [2023-02-15 10:31:12,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5579 to 4492. [2023-02-15 10:31:12,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4492 states, 3816 states have (on average 1.44916142557652) internal successors, (5530), 3940 states have internal predecessors, (5530), 465 states have call successors, (465), 161 states have call predecessors, (465), 210 states have return successors, (639), 405 states have call predecessors, (639), 448 states have call successors, (639) [2023-02-15 10:31:12,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4492 states to 4492 states and 6634 transitions. [2023-02-15 10:31:12,861 INFO L78 Accepts]: Start accepts. Automaton has 4492 states and 6634 transitions. Word has length 71 [2023-02-15 10:31:12,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 10:31:12,862 INFO L495 AbstractCegarLoop]: Abstraction has 4492 states and 6634 transitions. [2023-02-15 10:31:12,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 5 states have internal predecessors, (60), 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) [2023-02-15 10:31:12,862 INFO L276 IsEmpty]: Start isEmpty. Operand 4492 states and 6634 transitions. [2023-02-15 10:31:12,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-02-15 10:31:12,863 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 10:31:12,863 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] [2023-02-15 10:31:12,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-02-15 10:31:12,864 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 10:31:12,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 10:31:12,864 INFO L85 PathProgramCache]: Analyzing trace with hash 302497870, now seen corresponding path program 1 times [2023-02-15 10:31:12,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 10:31:12,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494821079] [2023-02-15 10:31:12,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 10:31:12,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 10:31:12,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:31:13,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 10:31:13,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:31:13,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 10:31:13,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:31:13,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-02-15 10:31:13,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:31:13,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-15 10:31:13,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 10:31:13,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 10:31:13,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 10:31:13,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494821079] [2023-02-15 10:31:13,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494821079] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 10:31:13,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 10:31:13,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-15 10:31:13,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521505122] [2023-02-15 10:31:13,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 10:31:13,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 10:31:13,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 10:31:13,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 10:31:13,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-02-15 10:31:13,225 INFO L87 Difference]: Start difference. First operand 4492 states and 6634 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)