./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ntdrivers/cdaudio.i.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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/cdaudio.i.cil-2.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 158aa30053f80b6c80bcbeac6f52ce0f8b5c03af85b763fe7e9897c790504a73 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 10:57:41,953 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 10:57:41,956 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 10:57:42,001 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 10:57:42,002 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 10:57:42,003 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 10:57:42,006 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 10:57:42,008 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 10:57:42,010 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 10:57:42,014 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 10:57:42,015 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 10:57:42,017 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 10:57:42,017 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 10:57:42,018 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 10:57:42,019 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 10:57:42,022 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 10:57:42,023 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 10:57:42,024 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 10:57:42,026 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 10:57:42,031 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 10:57:42,032 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 10:57:42,033 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 10:57:42,034 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 10:57:42,035 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 10:57:42,036 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 10:57:42,039 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 10:57:42,039 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 10:57:42,040 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 10:57:42,040 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 10:57:42,041 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 10:57:42,042 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 10:57:42,042 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 10:57:42,044 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 10:57:42,044 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 10:57:42,045 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 10:57:42,046 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 10:57:42,046 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 10:57:42,047 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 10:57:42,047 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 10:57:42,048 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 10:57:42,048 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 10:57:42,050 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 10:57:42,051 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 10:57:42,082 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 10:57:42,082 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 10:57:42,083 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 10:57:42,083 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 10:57:42,084 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 10:57:42,084 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 10:57:42,084 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 10:57:42,084 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 10:57:42,085 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 10:57:42,085 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 10:57:42,086 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 10:57:42,086 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 10:57:42,086 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 10:57:42,086 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 10:57:42,086 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 10:57:42,087 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 10:57:42,087 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 10:57:42,087 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 10:57:42,087 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 10:57:42,087 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 10:57:42,088 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 10:57:42,088 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 10:57:42,088 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 10:57:42,088 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 10:57:42,088 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 10:57:42,089 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 10:57:42,089 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 10:57:42,089 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 10:57:42,089 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 10:57:42,089 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 10:57:42,090 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 10:57:42,090 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 10:57:42,090 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 10:57:42,090 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 158aa30053f80b6c80bcbeac6f52ce0f8b5c03af85b763fe7e9897c790504a73 [2022-07-19 10:57:42,324 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 10:57:42,352 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 10:57:42,354 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 10:57:42,356 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 10:57:42,356 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 10:57:42,357 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ntdrivers/cdaudio.i.cil-2.c [2022-07-19 10:57:42,424 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/442c1902f/759253732f8e441d97e262e04b81fd21/FLAG128dbbadf [2022-07-19 10:57:43,157 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 10:57:43,158 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/cdaudio.i.cil-2.c [2022-07-19 10:57:43,209 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/442c1902f/759253732f8e441d97e262e04b81fd21/FLAG128dbbadf [2022-07-19 10:57:43,261 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/442c1902f/759253732f8e441d97e262e04b81fd21 [2022-07-19 10:57:43,263 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 10:57:43,264 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 10:57:43,267 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 10:57:43,267 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 10:57:43,270 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 10:57:43,270 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:57:43" (1/1) ... [2022-07-19 10:57:43,271 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7748e33a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:57:43, skipping insertion in model container [2022-07-19 10:57:43,272 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:57:43" (1/1) ... [2022-07-19 10:57:43,299 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 10:57:43,398 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 10:57:44,008 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/cdaudio.i.cil-2.c[90200,90213] [2022-07-19 10:57:44,624 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 10:57:44,634 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 10:57:44,703 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/cdaudio.i.cil-2.c[90200,90213] [2022-07-19 10:57:44,975 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 10:57:45,001 INFO L208 MainTranslator]: Completed translation [2022-07-19 10:57:45,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:57:45 WrapperNode [2022-07-19 10:57:45,002 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 10:57:45,003 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 10:57:45,003 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 10:57:45,003 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 10:57:45,010 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:57:45" (1/1) ... [2022-07-19 10:57:45,127 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:57:45" (1/1) ... [2022-07-19 10:57:45,230 INFO L137 Inliner]: procedures = 121, calls = 2189, calls flagged for inlining = 23, calls inlined = 19, statements flattened = 2294 [2022-07-19 10:57:45,230 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 10:57:45,231 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 10:57:45,232 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 10:57:45,232 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 10:57:45,239 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:57:45" (1/1) ... [2022-07-19 10:57:45,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:57:45" (1/1) ... [2022-07-19 10:57:45,278 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:57:45" (1/1) ... [2022-07-19 10:57:45,280 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:57:45" (1/1) ... [2022-07-19 10:57:45,368 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:57:45" (1/1) ... [2022-07-19 10:57:45,388 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:57:45" (1/1) ... [2022-07-19 10:57:45,414 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:57:45" (1/1) ... [2022-07-19 10:57:45,435 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 10:57:45,437 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 10:57:45,438 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 10:57:45,438 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 10:57:45,439 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:57:45" (1/1) ... [2022-07-19 10:57:45,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 10:57:45,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:57:45,468 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 10:57:45,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 10:57:45,516 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-07-19 10:57:45,516 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-07-19 10:57:45,516 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-07-19 10:57:45,516 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 10:57:45,517 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2022-07-19 10:57:45,517 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2022-07-19 10:57:45,517 INFO L130 BoogieDeclarations]: Found specification of procedure MmLockPagableDataSection [2022-07-19 10:57:45,517 INFO L138 BoogieDeclarations]: Found implementation of procedure MmLockPagableDataSection [2022-07-19 10:57:45,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 10:57:45,517 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioIsPlayActive [2022-07-19 10:57:45,517 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioIsPlayActive [2022-07-19 10:57:45,518 INFO L130 BoogieDeclarations]: Found specification of procedure IoOpenDeviceRegistryKey [2022-07-19 10:57:45,518 INFO L138 BoogieDeclarations]: Found implementation of procedure IoOpenDeviceRegistryKey [2022-07-19 10:57:45,518 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2022-07-19 10:57:45,518 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2022-07-19 10:57:45,518 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-07-19 10:57:45,518 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-07-19 10:57:45,519 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_malloc [2022-07-19 10:57:45,519 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_malloc [2022-07-19 10:57:45,519 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2022-07-19 10:57:45,519 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2022-07-19 10:57:45,519 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-19 10:57:45,519 INFO L130 BoogieDeclarations]: Found specification of procedure ZwClose [2022-07-19 10:57:45,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ZwClose [2022-07-19 10:57:45,520 INFO L130 BoogieDeclarations]: Found specification of procedure SendSrbSynchronous [2022-07-19 10:57:45,520 INFO L138 BoogieDeclarations]: Found implementation of procedure SendSrbSynchronous [2022-07-19 10:57:45,520 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 10:57:45,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-19 10:57:45,520 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 10:57:45,520 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2022-07-19 10:57:45,521 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2022-07-19 10:57:45,521 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-07-19 10:57:45,521 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-19 10:57:45,521 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2022-07-19 10:57:45,521 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2022-07-19 10:57:45,522 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSignalCompletion [2022-07-19 10:57:45,522 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSignalCompletion [2022-07-19 10:57:45,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 10:57:45,522 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2022-07-19 10:57:45,522 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2022-07-19 10:57:45,522 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memmove [2022-07-19 10:57:45,523 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memmove [2022-07-19 10:57:45,523 INFO L130 BoogieDeclarations]: Found specification of procedure HPCdrCompletion [2022-07-19 10:57:45,523 INFO L138 BoogieDeclarations]: Found implementation of procedure HPCdrCompletion [2022-07-19 10:57:45,523 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 10:57:45,524 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSendToNextDriver [2022-07-19 10:57:45,524 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSendToNextDriver [2022-07-19 10:57:45,524 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-07-19 10:57:45,524 INFO L130 BoogieDeclarations]: Found specification of procedure ExAllocatePoolWithTag [2022-07-19 10:57:45,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ExAllocatePoolWithTag [2022-07-19 10:57:45,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 10:57:45,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 10:57:45,525 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioForwardIrpSynchronous [2022-07-19 10:57:45,526 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioForwardIrpSynchronous [2022-07-19 10:57:45,989 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 10:57:45,991 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 10:57:46,214 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:57:46,271 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2022-07-19 10:57:46,271 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2022-07-19 10:57:46,584 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:57:46,604 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume !false; [2022-07-19 10:57:46,604 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume false; [2022-07-19 10:57:46,620 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:57:46,620 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:57:46,621 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:57:46,628 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:57:46,635 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:57:46,642 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:57:58,894 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##258: assume false; [2022-07-19 10:57:58,895 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##259: assume !false; [2022-07-19 10:57:58,895 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##485: assume false; [2022-07-19 10:57:58,895 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##486: assume !false; [2022-07-19 10:57:58,895 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint L3709: CdAudioPnp_#res#1 := 0; [2022-07-19 10:57:58,895 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##47: assume !false; [2022-07-19 10:57:58,895 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##46: assume false; [2022-07-19 10:57:58,895 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##25: assume !false; [2022-07-19 10:57:58,895 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##24: assume false; [2022-07-19 10:57:58,895 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume !false; [2022-07-19 10:57:58,896 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##154: assume !false; [2022-07-19 10:57:58,896 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##153: assume false; [2022-07-19 10:57:58,896 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##14: assume false; [2022-07-19 10:57:58,926 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:57:58,932 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-07-19 10:57:58,932 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-07-19 10:57:58,953 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 10:57:58,974 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 10:57:58,975 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-19 10:57:58,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:57:58 BoogieIcfgContainer [2022-07-19 10:57:58,978 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 10:57:58,980 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 10:57:58,981 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 10:57:58,983 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 10:57:58,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 10:57:43" (1/3) ... [2022-07-19 10:57:58,984 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5db6d570 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:57:58, skipping insertion in model container [2022-07-19 10:57:58,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:57:45" (2/3) ... [2022-07-19 10:57:58,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5db6d570 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:57:58, skipping insertion in model container [2022-07-19 10:57:58,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:57:58" (3/3) ... [2022-07-19 10:57:58,987 INFO L111 eAbstractionObserver]: Analyzing ICFG cdaudio.i.cil-2.c [2022-07-19 10:57:58,999 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 10:57:58,999 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 10:57:59,070 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 10:57:59,077 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5054276a, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@13021275 [2022-07-19 10:57:59,077 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 10:57:59,084 INFO L276 IsEmpty]: Start isEmpty. Operand has 617 states, 483 states have (on average 1.525879917184265) internal successors, (737), 502 states have internal predecessors, (737), 113 states have call successors, (113), 19 states have call predecessors, (113), 19 states have return successors, (113), 108 states have call predecessors, (113), 113 states have call successors, (113) [2022-07-19 10:57:59,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-19 10:57:59,090 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:57:59,090 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:57:59,091 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:57:59,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:57:59,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1346091919, now seen corresponding path program 1 times [2022-07-19 10:57:59,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:57:59,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463982645] [2022-07-19 10:57:59,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:57:59,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:57:59,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:57:59,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:57:59,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:57:59,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463982645] [2022-07-19 10:57:59,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463982645] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:57:59,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:57:59,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 10:57:59,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997749236] [2022-07-19 10:57:59,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:57:59,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 10:57:59,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:57:59,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 10:57:59,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 10:57:59,513 INFO L87 Difference]: Start difference. First operand has 617 states, 483 states have (on average 1.525879917184265) internal successors, (737), 502 states have internal predecessors, (737), 113 states have call successors, (113), 19 states have call predecessors, (113), 19 states have return successors, (113), 108 states have call predecessors, (113), 113 states have call successors, (113) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:57:59,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:57:59,661 INFO L93 Difference]: Finished difference Result 1094 states and 1737 transitions. [2022-07-19 10:57:59,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 10:57:59,668 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-19 10:57:59,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:57:59,684 INFO L225 Difference]: With dead ends: 1094 [2022-07-19 10:57:59,684 INFO L226 Difference]: Without dead ends: 610 [2022-07-19 10:57:59,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 10:57:59,694 INFO L413 NwaCegarLoop]: 928 mSDtfsCounter, 8 mSDsluCounter, 879 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1807 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:57:59,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 1807 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:57:59,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2022-07-19 10:57:59,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 610. [2022-07-19 10:57:59,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 478 states have (on average 1.4832635983263598) internal successors, (709), 495 states have internal predecessors, (709), 113 states have call successors, (113), 19 states have call predecessors, (113), 18 states have return successors, (97), 97 states have call predecessors, (97), 97 states have call successors, (97) [2022-07-19 10:57:59,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 919 transitions. [2022-07-19 10:57:59,768 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 919 transitions. Word has length 13 [2022-07-19 10:57:59,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:57:59,769 INFO L495 AbstractCegarLoop]: Abstraction has 610 states and 919 transitions. [2022-07-19 10:57:59,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:57:59,769 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 919 transitions. [2022-07-19 10:57:59,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-19 10:57:59,770 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:57:59,770 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:57:59,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 10:57:59,771 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:57:59,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:57:59,771 INFO L85 PathProgramCache]: Analyzing trace with hash 503268838, now seen corresponding path program 1 times [2022-07-19 10:57:59,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:57:59,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685517831] [2022-07-19 10:57:59,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:57:59,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:57:59,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:57:59,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:57:59,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:57:59,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685517831] [2022-07-19 10:57:59,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685517831] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:57:59,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:57:59,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 10:57:59,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218142385] [2022-07-19 10:57:59,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:57:59,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 10:57:59,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:57:59,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 10:57:59,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 10:57:59,880 INFO L87 Difference]: Start difference. First operand 610 states and 919 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:58:00,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:58:00,061 INFO L93 Difference]: Finished difference Result 1141 states and 1702 transitions. [2022-07-19 10:58:00,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 10:58:00,061 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-07-19 10:58:00,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:58:00,070 INFO L225 Difference]: With dead ends: 1141 [2022-07-19 10:58:00,071 INFO L226 Difference]: Without dead ends: 891 [2022-07-19 10:58:00,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 10:58:00,077 INFO L413 NwaCegarLoop]: 1239 mSDtfsCounter, 833 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 833 SdHoareTripleChecker+Valid, 1664 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:58:00,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [833 Valid, 1664 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:58:00,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2022-07-19 10:58:00,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 871. [2022-07-19 10:58:00,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 696 states have (on average 1.4612068965517242) internal successors, (1017), 699 states have internal predecessors, (1017), 142 states have call successors, (142), 33 states have call predecessors, (142), 32 states have return successors, (146), 140 states have call predecessors, (146), 130 states have call successors, (146) [2022-07-19 10:58:00,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 1305 transitions. [2022-07-19 10:58:00,146 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 1305 transitions. Word has length 15 [2022-07-19 10:58:00,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:58:00,147 INFO L495 AbstractCegarLoop]: Abstraction has 871 states and 1305 transitions. [2022-07-19 10:58:00,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:58:00,148 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 1305 transitions. [2022-07-19 10:58:00,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-19 10:58:00,152 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:58:00,152 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:58:00,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 10:58:00,152 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:58:00,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:58:00,159 INFO L85 PathProgramCache]: Analyzing trace with hash -485834161, now seen corresponding path program 1 times [2022-07-19 10:58:00,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:58:00,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822543338] [2022-07-19 10:58:00,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:58:00,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:58:00,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:00,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:58:00,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:58:00,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822543338] [2022-07-19 10:58:00,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822543338] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:58:00,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:58:00,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 10:58:00,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013181431] [2022-07-19 10:58:00,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:58:00,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 10:58:00,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:58:00,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 10:58:00,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 10:58:00,281 INFO L87 Difference]: Start difference. First operand 871 states and 1305 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:58:00,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:58:00,430 INFO L93 Difference]: Finished difference Result 1865 states and 2854 transitions. [2022-07-19 10:58:00,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 10:58:00,430 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-19 10:58:00,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:58:00,439 INFO L225 Difference]: With dead ends: 1865 [2022-07-19 10:58:00,439 INFO L226 Difference]: Without dead ends: 1453 [2022-07-19 10:58:00,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 10:58:00,442 INFO L413 NwaCegarLoop]: 1451 mSDtfsCounter, 586 mSDsluCounter, 865 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 586 SdHoareTripleChecker+Valid, 2316 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:58:00,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [586 Valid, 2316 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:58:00,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1453 states. [2022-07-19 10:58:00,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1453 to 1050. [2022-07-19 10:58:00,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 833 states have (on average 1.446578631452581) internal successors, (1205), 835 states have internal predecessors, (1205), 170 states have call successors, (170), 46 states have call predecessors, (170), 46 states have return successors, (217), 170 states have call predecessors, (217), 158 states have call successors, (217) [2022-07-19 10:58:00,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 1592 transitions. [2022-07-19 10:58:00,487 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 1592 transitions. Word has length 22 [2022-07-19 10:58:00,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:58:00,488 INFO L495 AbstractCegarLoop]: Abstraction has 1050 states and 1592 transitions. [2022-07-19 10:58:00,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:58:00,488 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 1592 transitions. [2022-07-19 10:58:00,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-19 10:58:00,489 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:58:00,489 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:58:00,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 10:58:00,490 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:58:00,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:58:00,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1681895330, now seen corresponding path program 1 times [2022-07-19 10:58:00,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:58:00,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057624420] [2022-07-19 10:58:00,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:58:00,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:58:00,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:00,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:58:00,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:58:00,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057624420] [2022-07-19 10:58:00,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057624420] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:58:00,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:58:00,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 10:58:00,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415044273] [2022-07-19 10:58:00,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:58:00,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 10:58:00,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:58:00,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 10:58:00,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 10:58:00,574 INFO L87 Difference]: Start difference. First operand 1050 states and 1592 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:58:00,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:58:00,629 INFO L93 Difference]: Finished difference Result 1728 states and 2570 transitions. [2022-07-19 10:58:00,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 10:58:00,630 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-19 10:58:00,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:58:00,638 INFO L225 Difference]: With dead ends: 1728 [2022-07-19 10:58:00,638 INFO L226 Difference]: Without dead ends: 1595 [2022-07-19 10:58:00,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 10:58:00,640 INFO L413 NwaCegarLoop]: 1131 mSDtfsCounter, 836 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 836 SdHoareTripleChecker+Valid, 1540 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:58:00,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [836 Valid, 1540 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:58:00,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1595 states. [2022-07-19 10:58:00,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1595 to 1533. [2022-07-19 10:58:00,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1533 states, 1229 states have (on average 1.4475183075671278) internal successors, (1779), 1227 states have internal predecessors, (1779), 227 states have call successors, (227), 72 states have call predecessors, (227), 76 states have return successors, (298), 233 states have call predecessors, (298), 218 states have call successors, (298) [2022-07-19 10:58:00,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1533 states to 1533 states and 2304 transitions. [2022-07-19 10:58:00,695 INFO L78 Accepts]: Start accepts. Automaton has 1533 states and 2304 transitions. Word has length 22 [2022-07-19 10:58:00,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:58:00,695 INFO L495 AbstractCegarLoop]: Abstraction has 1533 states and 2304 transitions. [2022-07-19 10:58:00,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:58:00,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1533 states and 2304 transitions. [2022-07-19 10:58:00,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-19 10:58:00,697 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:58:00,697 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] [2022-07-19 10:58:00,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 10:58:00,698 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:58:00,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:58:00,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1879986928, now seen corresponding path program 1 times [2022-07-19 10:58:00,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:58:00,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352849045] [2022-07-19 10:58:00,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:58:00,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:58:00,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:00,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:58:00,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:58:00,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352849045] [2022-07-19 10:58:00,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352849045] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:58:00,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:58:00,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 10:58:00,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587580927] [2022-07-19 10:58:00,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:58:00,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 10:58:00,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:58:00,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 10:58:00,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 10:58:00,778 INFO L87 Difference]: Start difference. First operand 1533 states and 2304 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:58:01,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:58:01,375 INFO L93 Difference]: Finished difference Result 2744 states and 4158 transitions. [2022-07-19 10:58:01,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 10:58:01,376 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-19 10:58:01,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:58:01,385 INFO L225 Difference]: With dead ends: 2744 [2022-07-19 10:58:01,385 INFO L226 Difference]: Without dead ends: 1832 [2022-07-19 10:58:01,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:58:01,388 INFO L413 NwaCegarLoop]: 1164 mSDtfsCounter, 1440 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 346 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1442 SdHoareTripleChecker+Valid, 1463 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 346 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 10:58:01,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1442 Valid, 1463 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [346 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 10:58:01,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2022-07-19 10:58:01,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1521. [2022-07-19 10:58:01,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1219 states have (on average 1.4446267432321576) internal successors, (1761), 1217 states have internal predecessors, (1761), 225 states have call successors, (225), 70 states have call predecessors, (225), 76 states have return successors, (294), 233 states have call predecessors, (294), 216 states have call successors, (294) [2022-07-19 10:58:01,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 2280 transitions. [2022-07-19 10:58:01,443 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 2280 transitions. Word has length 23 [2022-07-19 10:58:01,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:58:01,444 INFO L495 AbstractCegarLoop]: Abstraction has 1521 states and 2280 transitions. [2022-07-19 10:58:01,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:58:01,444 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 2280 transitions. [2022-07-19 10:58:01,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-19 10:58:01,445 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:58:01,445 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:58:01,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 10:58:01,446 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:58:01,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:58:01,446 INFO L85 PathProgramCache]: Analyzing trace with hash 405401967, now seen corresponding path program 1 times [2022-07-19 10:58:01,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:58:01,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493736350] [2022-07-19 10:58:01,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:58:01,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:58:01,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:01,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:58:01,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:58:01,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493736350] [2022-07-19 10:58:01,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493736350] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:58:01,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:58:01,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 10:58:01,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000178089] [2022-07-19 10:58:01,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:58:01,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 10:58:01,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:58:01,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 10:58:01,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 10:58:01,504 INFO L87 Difference]: Start difference. First operand 1521 states and 2280 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:58:01,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:58:01,591 INFO L93 Difference]: Finished difference Result 1524 states and 2282 transitions. [2022-07-19 10:58:01,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 10:58:01,591 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-19 10:58:01,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:58:01,598 INFO L225 Difference]: With dead ends: 1524 [2022-07-19 10:58:01,598 INFO L226 Difference]: Without dead ends: 1520 [2022-07-19 10:58:01,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 10:58:01,600 INFO L413 NwaCegarLoop]: 878 mSDtfsCounter, 22 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 1711 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:58:01,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 1711 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:58:01,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2022-07-19 10:58:01,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 1520. [2022-07-19 10:58:01,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1520 states, 1219 states have (on average 1.44298605414274) internal successors, (1759), 1216 states have internal predecessors, (1759), 224 states have call successors, (224), 70 states have call predecessors, (224), 76 states have return successors, (294), 233 states have call predecessors, (294), 216 states have call successors, (294) [2022-07-19 10:58:01,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1520 states to 1520 states and 2277 transitions. [2022-07-19 10:58:01,692 INFO L78 Accepts]: Start accepts. Automaton has 1520 states and 2277 transitions. Word has length 22 [2022-07-19 10:58:01,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:58:01,693 INFO L495 AbstractCegarLoop]: Abstraction has 1520 states and 2277 transitions. [2022-07-19 10:58:01,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:58:01,693 INFO L276 IsEmpty]: Start isEmpty. Operand 1520 states and 2277 transitions. [2022-07-19 10:58:01,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-19 10:58:01,695 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:58:01,695 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] [2022-07-19 10:58:01,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 10:58:01,697 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:58:01,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:58:01,699 INFO L85 PathProgramCache]: Analyzing trace with hash -605609214, now seen corresponding path program 1 times [2022-07-19 10:58:01,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:58:01,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273052126] [2022-07-19 10:58:01,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:58:01,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:58:01,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:01,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:58:01,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:01,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:58:01,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:58:01,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273052126] [2022-07-19 10:58:01,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273052126] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:58:01,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:58:01,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 10:58:01,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600206438] [2022-07-19 10:58:01,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:58:01,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 10:58:01,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:58:01,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 10:58:01,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:58:01,827 INFO L87 Difference]: Start difference. First operand 1520 states and 2277 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 10:58:06,628 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:58:08,809 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:58:10,339 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:58:12,957 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:58:15,032 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:58:15,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:58:15,669 INFO L93 Difference]: Finished difference Result 2367 states and 3491 transitions. [2022-07-19 10:58:15,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 10:58:15,671 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-07-19 10:58:15,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:58:15,678 INFO L225 Difference]: With dead ends: 2367 [2022-07-19 10:58:15,678 INFO L226 Difference]: Without dead ends: 1281 [2022-07-19 10:58:15,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-19 10:58:15,681 INFO L413 NwaCegarLoop]: 959 mSDtfsCounter, 804 mSDsluCounter, 1585 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 287 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 807 SdHoareTripleChecker+Valid, 2544 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.7s IncrementalHoareTripleChecker+Time [2022-07-19 10:58:15,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [807 Valid, 2544 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 482 Invalid, 4 Unknown, 0 Unchecked, 13.7s Time] [2022-07-19 10:58:15,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2022-07-19 10:58:15,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 1137. [2022-07-19 10:58:15,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 912 states have (on average 1.4221491228070176) internal successors, (1297), 911 states have internal predecessors, (1297), 163 states have call successors, (163), 55 states have call predecessors, (163), 61 states have return successors, (215), 170 states have call predecessors, (215), 155 states have call successors, (215) [2022-07-19 10:58:15,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 1675 transitions. [2022-07-19 10:58:15,758 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 1675 transitions. Word has length 35 [2022-07-19 10:58:15,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:58:15,760 INFO L495 AbstractCegarLoop]: Abstraction has 1137 states and 1675 transitions. [2022-07-19 10:58:15,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 10:58:15,760 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 1675 transitions. [2022-07-19 10:58:15,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-19 10:58:15,764 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:58:15,764 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] [2022-07-19 10:58:15,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 10:58:15,764 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:58:15,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:58:15,765 INFO L85 PathProgramCache]: Analyzing trace with hash -81924256, now seen corresponding path program 1 times [2022-07-19 10:58:15,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:58:15,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166356321] [2022-07-19 10:58:15,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:58:15,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:58:15,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:15,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:58:15,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:58:15,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166356321] [2022-07-19 10:58:15,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166356321] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:58:15,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:58:15,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 10:58:15,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587734363] [2022-07-19 10:58:15,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:58:15,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 10:58:15,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:58:15,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 10:58:15,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 10:58:15,902 INFO L87 Difference]: Start difference. First operand 1137 states and 1675 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:58:16,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:58:16,314 INFO L93 Difference]: Finished difference Result 1200 states and 1757 transitions. [2022-07-19 10:58:16,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 10:58:16,315 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-07-19 10:58:16,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:58:16,321 INFO L225 Difference]: With dead ends: 1200 [2022-07-19 10:58:16,321 INFO L226 Difference]: Without dead ends: 1155 [2022-07-19 10:58:16,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:58:16,322 INFO L413 NwaCegarLoop]: 875 mSDtfsCounter, 924 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 924 SdHoareTripleChecker+Valid, 1513 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 10:58:16,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [924 Valid, 1513 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 10:58:16,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2022-07-19 10:58:16,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 1137. [2022-07-19 10:58:16,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 912 states have (on average 1.4199561403508771) internal successors, (1295), 911 states have internal predecessors, (1295), 163 states have call successors, (163), 55 states have call predecessors, (163), 61 states have return successors, (215), 170 states have call predecessors, (215), 155 states have call successors, (215) [2022-07-19 10:58:16,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 1673 transitions. [2022-07-19 10:58:16,365 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 1673 transitions. Word has length 31 [2022-07-19 10:58:16,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:58:16,366 INFO L495 AbstractCegarLoop]: Abstraction has 1137 states and 1673 transitions. [2022-07-19 10:58:16,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:58:16,366 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 1673 transitions. [2022-07-19 10:58:16,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-19 10:58:16,368 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:58:16,368 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] [2022-07-19 10:58:16,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 10:58:16,368 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:58:16,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:58:16,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1935229893, now seen corresponding path program 1 times [2022-07-19 10:58:16,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:58:16,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924667659] [2022-07-19 10:58:16,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:58:16,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:58:16,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:16,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:58:16,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:58:16,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924667659] [2022-07-19 10:58:16,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924667659] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:58:16,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:58:16,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 10:58:16,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822365401] [2022-07-19 10:58:16,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:58:16,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 10:58:16,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:58:16,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 10:58:16,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 10:58:16,452 INFO L87 Difference]: Start difference. First operand 1137 states and 1673 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:58:16,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:58:16,843 INFO L93 Difference]: Finished difference Result 1189 states and 1739 transitions. [2022-07-19 10:58:16,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 10:58:16,844 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-07-19 10:58:16,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:58:16,849 INFO L225 Difference]: With dead ends: 1189 [2022-07-19 10:58:16,849 INFO L226 Difference]: Without dead ends: 1116 [2022-07-19 10:58:16,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:58:16,852 INFO L413 NwaCegarLoop]: 873 mSDtfsCounter, 904 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 904 SdHoareTripleChecker+Valid, 1511 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 10:58:16,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [904 Valid, 1511 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 10:58:16,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2022-07-19 10:58:16,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 1114. [2022-07-19 10:58:16,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 891 states have (on average 1.425364758698092) internal successors, (1270), 897 states have internal predecessors, (1270), 163 states have call successors, (163), 55 states have call predecessors, (163), 59 states have return successors, (206), 161 states have call predecessors, (206), 155 states have call successors, (206) [2022-07-19 10:58:16,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 1639 transitions. [2022-07-19 10:58:16,927 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 1639 transitions. Word has length 33 [2022-07-19 10:58:16,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:58:16,927 INFO L495 AbstractCegarLoop]: Abstraction has 1114 states and 1639 transitions. [2022-07-19 10:58:16,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:58:16,927 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 1639 transitions. [2022-07-19 10:58:16,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-19 10:58:16,929 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:58:16,930 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] [2022-07-19 10:58:16,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-19 10:58:16,931 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:58:16,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:58:16,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1785748283, now seen corresponding path program 1 times [2022-07-19 10:58:16,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:58:16,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612229377] [2022-07-19 10:58:16,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:58:16,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:58:16,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:17,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:58:17,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:58:17,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612229377] [2022-07-19 10:58:17,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612229377] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:58:17,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:58:17,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 10:58:17,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708592109] [2022-07-19 10:58:17,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:58:17,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 10:58:17,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:58:17,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 10:58:17,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 10:58:17,013 INFO L87 Difference]: Start difference. First operand 1114 states and 1639 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:58:17,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:58:17,073 INFO L93 Difference]: Finished difference Result 1191 states and 1741 transitions. [2022-07-19 10:58:17,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 10:58:17,074 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-07-19 10:58:17,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:58:17,079 INFO L225 Difference]: With dead ends: 1191 [2022-07-19 10:58:17,079 INFO L226 Difference]: Without dead ends: 1172 [2022-07-19 10:58:17,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 10:58:17,080 INFO L413 NwaCegarLoop]: 880 mSDtfsCounter, 866 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 866 SdHoareTripleChecker+Valid, 937 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:58:17,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [866 Valid, 937 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:58:17,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2022-07-19 10:58:17,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 1150. [2022-07-19 10:58:17,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 924 states have (on average 1.4274891774891776) internal successors, (1319), 930 states have internal predecessors, (1319), 164 states have call successors, (164), 56 states have call predecessors, (164), 61 states have return successors, (208), 163 states have call predecessors, (208), 156 states have call successors, (208) [2022-07-19 10:58:17,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 1691 transitions. [2022-07-19 10:58:17,134 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 1691 transitions. Word has length 33 [2022-07-19 10:58:17,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:58:17,134 INFO L495 AbstractCegarLoop]: Abstraction has 1150 states and 1691 transitions. [2022-07-19 10:58:17,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:58:17,135 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 1691 transitions. [2022-07-19 10:58:17,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-19 10:58:17,136 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:58:17,136 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] [2022-07-19 10:58:17,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-19 10:58:17,137 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:58:17,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:58:17,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1771403374, now seen corresponding path program 1 times [2022-07-19 10:58:17,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:58:17,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751785402] [2022-07-19 10:58:17,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:58:17,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:58:17,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:17,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:58:17,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:58:17,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751785402] [2022-07-19 10:58:17,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751785402] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:58:17,194 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:58:17,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 10:58:17,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054116212] [2022-07-19 10:58:17,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:58:17,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 10:58:17,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:58:17,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 10:58:17,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 10:58:17,196 INFO L87 Difference]: Start difference. First operand 1150 states and 1691 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:58:17,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:58:17,299 INFO L93 Difference]: Finished difference Result 1473 states and 2153 transitions. [2022-07-19 10:58:17,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 10:58:17,300 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-07-19 10:58:17,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:58:17,306 INFO L225 Difference]: With dead ends: 1473 [2022-07-19 10:58:17,306 INFO L226 Difference]: Without dead ends: 1457 [2022-07-19 10:58:17,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 10:58:17,308 INFO L413 NwaCegarLoop]: 1194 mSDtfsCounter, 354 mSDsluCounter, 823 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 2017 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:58:17,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 2017 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:58:17,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1457 states. [2022-07-19 10:58:17,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1457 to 1175. [2022-07-19 10:58:17,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1175 states, 947 states have (on average 1.4181626187961984) internal successors, (1343), 953 states have internal predecessors, (1343), 164 states have call successors, (164), 56 states have call predecessors, (164), 63 states have return successors, (209), 165 states have call predecessors, (209), 156 states have call successors, (209) [2022-07-19 10:58:17,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1175 states to 1175 states and 1716 transitions. [2022-07-19 10:58:17,365 INFO L78 Accepts]: Start accepts. Automaton has 1175 states and 1716 transitions. Word has length 33 [2022-07-19 10:58:17,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:58:17,366 INFO L495 AbstractCegarLoop]: Abstraction has 1175 states and 1716 transitions. [2022-07-19 10:58:17,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:58:17,366 INFO L276 IsEmpty]: Start isEmpty. Operand 1175 states and 1716 transitions. [2022-07-19 10:58:17,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-19 10:58:17,367 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:58:17,368 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] [2022-07-19 10:58:17,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-19 10:58:17,368 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:58:17,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:58:17,369 INFO L85 PathProgramCache]: Analyzing trace with hash 477313322, now seen corresponding path program 1 times [2022-07-19 10:58:17,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:58:17,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255650193] [2022-07-19 10:58:17,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:58:17,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:58:17,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:17,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 10:58:17,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:17,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:58:17,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:58:17,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255650193] [2022-07-19 10:58:17,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255650193] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:58:17,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:58:17,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 10:58:17,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985346139] [2022-07-19 10:58:17,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:58:17,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 10:58:17,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:58:17,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 10:58:17,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 10:58:17,556 INFO L87 Difference]: Start difference. First operand 1175 states and 1716 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 10:58:19,978 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:58:22,932 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:58:25,114 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:58:28,045 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:58:30,132 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:58:30,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:58:30,830 INFO L93 Difference]: Finished difference Result 1829 states and 2683 transitions. [2022-07-19 10:58:30,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 10:58:30,832 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-07-19 10:58:30,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:58:30,838 INFO L225 Difference]: With dead ends: 1829 [2022-07-19 10:58:30,838 INFO L226 Difference]: Without dead ends: 1167 [2022-07-19 10:58:30,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:58:30,840 INFO L413 NwaCegarLoop]: 850 mSDtfsCounter, 915 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 135 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 975 SdHoareTripleChecker+Valid, 1247 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:58:30,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [975 Valid, 1247 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 319 Invalid, 4 Unknown, 0 Unchecked, 13.2s Time] [2022-07-19 10:58:30,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2022-07-19 10:58:30,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 1108. [2022-07-19 10:58:30,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1108 states, 887 states have (on average 1.4126268320180384) internal successors, (1253), 891 states have internal predecessors, (1253), 161 states have call successors, (161), 55 states have call predecessors, (161), 59 states have return successors, (205), 161 states have call predecessors, (205), 155 states have call successors, (205) [2022-07-19 10:58:30,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 1619 transitions. [2022-07-19 10:58:30,900 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 1619 transitions. Word has length 36 [2022-07-19 10:58:30,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:58:30,901 INFO L495 AbstractCegarLoop]: Abstraction has 1108 states and 1619 transitions. [2022-07-19 10:58:30,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-19 10:58:30,901 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 1619 transitions. [2022-07-19 10:58:30,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-19 10:58:30,902 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:58:30,902 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] [2022-07-19 10:58:30,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-19 10:58:30,903 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:58:30,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:58:30,903 INFO L85 PathProgramCache]: Analyzing trace with hash -467724112, now seen corresponding path program 1 times [2022-07-19 10:58:30,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:58:30,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265275471] [2022-07-19 10:58:30,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:58:30,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:58:30,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:30,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:58:30,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:58:30,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265275471] [2022-07-19 10:58:30,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265275471] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:58:30,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:58:30,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 10:58:30,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737821294] [2022-07-19 10:58:30,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:58:30,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 10:58:30,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:58:30,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 10:58:30,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 10:58:30,991 INFO L87 Difference]: Start difference. First operand 1108 states and 1619 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:58:31,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:58:31,111 INFO L93 Difference]: Finished difference Result 1122 states and 1634 transitions. [2022-07-19 10:58:31,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 10:58:31,111 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-07-19 10:58:31,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:58:31,118 INFO L225 Difference]: With dead ends: 1122 [2022-07-19 10:58:31,118 INFO L226 Difference]: Without dead ends: 1118 [2022-07-19 10:58:31,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-19 10:58:31,119 INFO L413 NwaCegarLoop]: 866 mSDtfsCounter, 42 mSDsluCounter, 3417 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 4283 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:58:31,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 4283 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:58:31,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2022-07-19 10:58:31,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 1116. [2022-07-19 10:58:31,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1116 states, 895 states have (on average 1.4100558659217877) internal successors, (1262), 899 states have internal predecessors, (1262), 161 states have call successors, (161), 55 states have call predecessors, (161), 59 states have return successors, (205), 161 states have call predecessors, (205), 155 states have call successors, (205) [2022-07-19 10:58:31,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1116 states to 1116 states and 1628 transitions. [2022-07-19 10:58:31,189 INFO L78 Accepts]: Start accepts. Automaton has 1116 states and 1628 transitions. Word has length 34 [2022-07-19 10:58:31,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:58:31,190 INFO L495 AbstractCegarLoop]: Abstraction has 1116 states and 1628 transitions. [2022-07-19 10:58:31,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:58:31,190 INFO L276 IsEmpty]: Start isEmpty. Operand 1116 states and 1628 transitions. [2022-07-19 10:58:31,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-19 10:58:31,192 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:58:31,192 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] [2022-07-19 10:58:31,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-19 10:58:31,192 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:58:31,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:58:31,193 INFO L85 PathProgramCache]: Analyzing trace with hash -468000942, now seen corresponding path program 1 times [2022-07-19 10:58:31,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:58:31,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147551806] [2022-07-19 10:58:31,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:58:31,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:58:31,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:31,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:58:31,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:58:31,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147551806] [2022-07-19 10:58:31,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147551806] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:58:31,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:58:31,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 10:58:31,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986464524] [2022-07-19 10:58:31,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:58:31,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 10:58:31,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:58:31,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 10:58:31,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 10:58:31,293 INFO L87 Difference]: Start difference. First operand 1116 states and 1628 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:58:31,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:58:31,768 INFO L93 Difference]: Finished difference Result 1385 states and 2024 transitions. [2022-07-19 10:58:31,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 10:58:31,769 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-07-19 10:58:31,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:58:31,776 INFO L225 Difference]: With dead ends: 1385 [2022-07-19 10:58:31,776 INFO L226 Difference]: Without dead ends: 1357 [2022-07-19 10:58:31,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:58:31,778 INFO L413 NwaCegarLoop]: 1155 mSDtfsCounter, 1145 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1155 SdHoareTripleChecker+Valid, 1780 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 10:58:31,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1155 Valid, 1780 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 10:58:31,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1357 states. [2022-07-19 10:58:31,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1357 to 1094. [2022-07-19 10:58:31,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 873 states have (on average 1.4158075601374571) internal successors, (1236), 877 states have internal predecessors, (1236), 161 states have call successors, (161), 55 states have call predecessors, (161), 59 states have return successors, (205), 161 states have call predecessors, (205), 155 states have call successors, (205) [2022-07-19 10:58:31,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 1602 transitions. [2022-07-19 10:58:31,840 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 1602 transitions. Word has length 34 [2022-07-19 10:58:31,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:58:31,841 INFO L495 AbstractCegarLoop]: Abstraction has 1094 states and 1602 transitions. [2022-07-19 10:58:31,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:58:31,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 1602 transitions. [2022-07-19 10:58:31,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-19 10:58:31,843 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:58:31,843 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] [2022-07-19 10:58:31,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-19 10:58:31,843 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:58:31,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:58:31,844 INFO L85 PathProgramCache]: Analyzing trace with hash 962516437, now seen corresponding path program 1 times [2022-07-19 10:58:31,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:58:31,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162290961] [2022-07-19 10:58:31,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:58:31,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:58:31,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:31,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:58:31,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:31,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 10:58:31,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:31,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:58:31,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:58:31,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162290961] [2022-07-19 10:58:31,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162290961] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:58:31,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:58:31,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 10:58:31,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820458202] [2022-07-19 10:58:31,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:58:31,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 10:58:31,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:58:31,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 10:58:31,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:58:31,965 INFO L87 Difference]: Start difference. First operand 1094 states and 1602 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, (5), 5 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 10:58:36,819 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:58:37,998 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:58:40,017 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:58:42,494 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:58:44,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:58:44,502 INFO L93 Difference]: Finished difference Result 1794 states and 2641 transitions. [2022-07-19 10:58:44,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 10:58:44,503 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, (5), 5 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 43 [2022-07-19 10:58:44,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:58:44,513 INFO L225 Difference]: With dead ends: 1794 [2022-07-19 10:58:44,513 INFO L226 Difference]: Without dead ends: 1226 [2022-07-19 10:58:44,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-19 10:58:44,516 INFO L413 NwaCegarLoop]: 914 mSDtfsCounter, 615 mSDsluCounter, 1446 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 264 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 644 SdHoareTripleChecker+Valid, 2360 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.4s IncrementalHoareTripleChecker+Time [2022-07-19 10:58:44,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [644 Valid, 2360 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 605 Invalid, 3 Unknown, 0 Unchecked, 12.4s Time] [2022-07-19 10:58:44,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1226 states. [2022-07-19 10:58:44,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1226 to 1053. [2022-07-19 10:58:44,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1053 states, 840 states have (on average 1.4166666666666667) internal successors, (1190), 847 states have internal predecessors, (1190), 156 states have call successors, (156), 51 states have call predecessors, (156), 56 states have return successors, (212), 154 states have call predecessors, (212), 150 states have call successors, (212) [2022-07-19 10:58:44,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1053 states to 1053 states and 1558 transitions. [2022-07-19 10:58:44,571 INFO L78 Accepts]: Start accepts. Automaton has 1053 states and 1558 transitions. Word has length 43 [2022-07-19 10:58:44,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:58:44,572 INFO L495 AbstractCegarLoop]: Abstraction has 1053 states and 1558 transitions. [2022-07-19 10:58:44,572 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, (5), 5 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 10:58:44,572 INFO L276 IsEmpty]: Start isEmpty. Operand 1053 states and 1558 transitions. [2022-07-19 10:58:44,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-19 10:58:44,574 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:58:44,574 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] [2022-07-19 10:58:44,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-19 10:58:44,574 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:58:44,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:58:44,575 INFO L85 PathProgramCache]: Analyzing trace with hash 314723646, now seen corresponding path program 1 times [2022-07-19 10:58:44,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:58:44,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194345492] [2022-07-19 10:58:44,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:58:44,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:58:44,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:44,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 10:58:44,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:44,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 10:58:44,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:44,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:58:44,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:58:44,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194345492] [2022-07-19 10:58:44,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194345492] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:58:44,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:58:44,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 10:58:44,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271541212] [2022-07-19 10:58:44,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:58:44,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 10:58:44,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:58:44,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 10:58:44,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:58:44,682 INFO L87 Difference]: Start difference. First operand 1053 states and 1558 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), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 10:58:47,304 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:58:50,573 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:58:52,903 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:58:56,218 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:58:56,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:58:56,305 INFO L93 Difference]: Finished difference Result 1167 states and 1731 transitions. [2022-07-19 10:58:56,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 10:58:56,306 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), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 43 [2022-07-19 10:58:56,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:58:56,311 INFO L225 Difference]: With dead ends: 1167 [2022-07-19 10:58:56,313 INFO L226 Difference]: Without dead ends: 1138 [2022-07-19 10:58:56,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-19 10:58:56,314 INFO L413 NwaCegarLoop]: 827 mSDtfsCounter, 291 mSDsluCounter, 1552 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 253 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 2379 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2022-07-19 10:58:56,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 2379 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 648 Invalid, 1 Unknown, 0 Unchecked, 11.5s Time] [2022-07-19 10:58:56,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2022-07-19 10:58:56,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 1054. [2022-07-19 10:58:56,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1054 states, 841 states have (on average 1.4161712247324614) internal successors, (1191), 848 states have internal predecessors, (1191), 156 states have call successors, (156), 51 states have call predecessors, (156), 56 states have return successors, (212), 154 states have call predecessors, (212), 150 states have call successors, (212) [2022-07-19 10:58:56,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 1559 transitions. [2022-07-19 10:58:56,384 INFO L78 Accepts]: Start accepts. Automaton has 1054 states and 1559 transitions. Word has length 43 [2022-07-19 10:58:56,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:58:56,384 INFO L495 AbstractCegarLoop]: Abstraction has 1054 states and 1559 transitions. [2022-07-19 10:58:56,385 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), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 10:58:56,385 INFO L276 IsEmpty]: Start isEmpty. Operand 1054 states and 1559 transitions. [2022-07-19 10:58:56,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-19 10:58:56,387 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:58:56,387 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] [2022-07-19 10:58:56,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-19 10:58:56,387 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:58:56,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:58:56,388 INFO L85 PathProgramCache]: Analyzing trace with hash 737425472, now seen corresponding path program 1 times [2022-07-19 10:58:56,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:58:56,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004268751] [2022-07-19 10:58:56,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:58:56,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:58:56,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:56,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 10:58:56,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:56,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 10:58:56,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:56,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:58:56,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:58:56,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004268751] [2022-07-19 10:58:56,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004268751] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:58:56,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:58:56,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 10:58:56,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85465670] [2022-07-19 10:58:56,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:58:56,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 10:58:56,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:58:56,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 10:58:56,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:58:56,489 INFO L87 Difference]: Start difference. First operand 1054 states and 1559 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), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 10:59:01,510 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:59:03,660 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:59:05,684 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:59:08,116 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:59:11,163 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:59:11,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:59:11,245 INFO L93 Difference]: Finished difference Result 1136 states and 1692 transitions. [2022-07-19 10:59:11,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 10:59:11,247 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), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 43 [2022-07-19 10:59:11,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:59:11,252 INFO L225 Difference]: With dead ends: 1136 [2022-07-19 10:59:11,252 INFO L226 Difference]: Without dead ends: 1129 [2022-07-19 10:59:11,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-19 10:59:11,253 INFO L413 NwaCegarLoop]: 825 mSDtfsCounter, 261 mSDsluCounter, 1559 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 241 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 2384 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.7s IncrementalHoareTripleChecker+Time [2022-07-19 10:59:11,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 2384 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 662 Invalid, 5 Unknown, 0 Unchecked, 14.7s Time] [2022-07-19 10:59:11,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2022-07-19 10:59:11,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 1066. [2022-07-19 10:59:11,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1066 states, 853 states have (on average 1.4126611957796014) internal successors, (1205), 860 states have internal predecessors, (1205), 156 states have call successors, (156), 51 states have call predecessors, (156), 56 states have return successors, (212), 154 states have call predecessors, (212), 150 states have call successors, (212) [2022-07-19 10:59:11,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1573 transitions. [2022-07-19 10:59:11,324 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1573 transitions. Word has length 43 [2022-07-19 10:59:11,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:59:11,324 INFO L495 AbstractCegarLoop]: Abstraction has 1066 states and 1573 transitions. [2022-07-19 10:59:11,324 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), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 10:59:11,325 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1573 transitions. [2022-07-19 10:59:11,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-19 10:59:11,326 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:59:11,327 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] [2022-07-19 10:59:11,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-19 10:59:11,327 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:59:11,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:59:11,328 INFO L85 PathProgramCache]: Analyzing trace with hash 975586301, now seen corresponding path program 1 times [2022-07-19 10:59:11,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:59:11,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736340940] [2022-07-19 10:59:11,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:59:11,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:59:11,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:11,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 10:59:11,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:11,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-19 10:59:11,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:11,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:59:11,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:59:11,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736340940] [2022-07-19 10:59:11,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736340940] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:59:11,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:59:11,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 10:59:11,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488772190] [2022-07-19 10:59:11,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:59:11,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 10:59:11,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:59:11,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 10:59:11,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:59:11,415 INFO L87 Difference]: Start difference. First operand 1066 states and 1573 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 3 states have internal predecessors, (38), 3 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) [2022-07-19 10:59:16,064 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:59:18,279 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:59:20,300 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:59:22,876 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:59:24,965 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:59:26,985 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:59:27,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:59:27,063 INFO L93 Difference]: Finished difference Result 1206 states and 1776 transitions. [2022-07-19 10:59:27,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 10:59:27,065 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), 3 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 44 [2022-07-19 10:59:27,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:59:27,070 INFO L225 Difference]: With dead ends: 1206 [2022-07-19 10:59:27,070 INFO L226 Difference]: Without dead ends: 1131 [2022-07-19 10:59:27,071 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 [2022-07-19 10:59:27,071 INFO L413 NwaCegarLoop]: 835 mSDtfsCounter, 901 mSDsluCounter, 1195 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 281 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 964 SdHoareTripleChecker+Valid, 2030 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 281 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.5s IncrementalHoareTripleChecker+Time [2022-07-19 10:59:27,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [964 Valid, 2030 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [281 Valid, 578 Invalid, 6 Unknown, 0 Unchecked, 15.5s Time] [2022-07-19 10:59:27,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2022-07-19 10:59:27,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 1055. [2022-07-19 10:59:27,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1055 states, 846 states have (on average 1.41371158392435) internal successors, (1196), 853 states have internal predecessors, (1196), 154 states have call successors, (154), 49 states have call predecessors, (154), 54 states have return successors, (210), 152 states have call predecessors, (210), 148 states have call successors, (210) [2022-07-19 10:59:27,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 1560 transitions. [2022-07-19 10:59:27,124 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 1560 transitions. Word has length 44 [2022-07-19 10:59:27,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:59:27,124 INFO L495 AbstractCegarLoop]: Abstraction has 1055 states and 1560 transitions. [2022-07-19 10:59:27,124 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), 3 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) [2022-07-19 10:59:27,124 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 1560 transitions. [2022-07-19 10:59:27,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-19 10:59:27,126 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:59:27,126 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] [2022-07-19 10:59:27,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-19 10:59:27,127 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:59:27,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:59:27,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1737788824, now seen corresponding path program 1 times [2022-07-19 10:59:27,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:59:27,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496509109] [2022-07-19 10:59:27,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:59:27,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:59:27,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:27,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 10:59:27,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:27,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 10:59:27,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:27,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:59:27,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:59:27,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496509109] [2022-07-19 10:59:27,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496509109] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:59:27,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:59:27,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-19 10:59:27,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540318902] [2022-07-19 10:59:27,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:59:27,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 10:59:27,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:59:27,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 10:59:27,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-07-19 10:59:27,296 INFO L87 Difference]: Start difference. First operand 1055 states and 1560 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 10:59:30,476 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:59:31,861 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:59:36,944 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:59:38,473 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:59:40,056 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:59:42,759 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:59:44,866 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:59:45,961 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:59:46,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:59:46,036 INFO L93 Difference]: Finished difference Result 1107 states and 1648 transitions. [2022-07-19 10:59:46,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 10:59:46,038 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 47 [2022-07-19 10:59:46,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:59:46,043 INFO L225 Difference]: With dead ends: 1107 [2022-07-19 10:59:46,043 INFO L226 Difference]: Without dead ends: 1092 [2022-07-19 10:59:46,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-07-19 10:59:46,044 INFO L413 NwaCegarLoop]: 840 mSDtfsCounter, 90 mSDsluCounter, 5255 mSDsCounter, 0 mSdLazyCounter, 1581 mSolverCounterSat, 103 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 6095 SdHoareTripleChecker+Invalid, 1688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1581 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.6s IncrementalHoareTripleChecker+Time [2022-07-19 10:59:46,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 6095 Invalid, 1688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1581 Invalid, 4 Unknown, 0 Unchecked, 18.6s Time] [2022-07-19 10:59:46,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1092 states. [2022-07-19 10:59:46,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1092 to 1053. [2022-07-19 10:59:46,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1053 states, 845 states have (on average 1.4130177514792899) internal successors, (1194), 852 states have internal predecessors, (1194), 153 states have call successors, (153), 49 states have call predecessors, (153), 54 states have return successors, (209), 151 states have call predecessors, (209), 147 states have call successors, (209) [2022-07-19 10:59:46,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1053 states to 1053 states and 1556 transitions. [2022-07-19 10:59:46,108 INFO L78 Accepts]: Start accepts. Automaton has 1053 states and 1556 transitions. Word has length 47 [2022-07-19 10:59:46,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:59:46,108 INFO L495 AbstractCegarLoop]: Abstraction has 1053 states and 1556 transitions. [2022-07-19 10:59:46,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 7 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 10:59:46,108 INFO L276 IsEmpty]: Start isEmpty. Operand 1053 states and 1556 transitions. [2022-07-19 10:59:46,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-19 10:59:46,110 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:59:46,110 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] [2022-07-19 10:59:46,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-19 10:59:46,111 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:59:46,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:59:46,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1317341012, now seen corresponding path program 1 times [2022-07-19 10:59:46,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:59:46,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581176338] [2022-07-19 10:59:46,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:59:46,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:59:46,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:46,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 10:59:46,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:46,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 10:59:46,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:46,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:59:46,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:59:46,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581176338] [2022-07-19 10:59:46,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581176338] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:59:46,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:59:46,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-19 10:59:46,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763716658] [2022-07-19 10:59:46,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:59:46,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 10:59:46,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:59:46,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 10:59:46,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-07-19 10:59:46,291 INFO L87 Difference]: Start difference. First operand 1053 states and 1556 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 10:59:52,841 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:59:54,776 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:59:56,792 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:59:59,173 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:00:01,248 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:00:01,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:00:01,818 INFO L93 Difference]: Finished difference Result 1104 states and 1643 transitions. [2022-07-19 11:00:01,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 11:00:01,820 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 45 [2022-07-19 11:00:01,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:00:01,825 INFO L225 Difference]: With dead ends: 1104 [2022-07-19 11:00:01,825 INFO L226 Difference]: Without dead ends: 1089 [2022-07-19 11:00:01,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-07-19 11:00:01,826 INFO L413 NwaCegarLoop]: 832 mSDtfsCounter, 90 mSDsluCounter, 5212 mSDsCounter, 0 mSdLazyCounter, 1570 mSolverCounterSat, 102 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 6044 SdHoareTripleChecker+Invalid, 1675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1570 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.4s IncrementalHoareTripleChecker+Time [2022-07-19 11:00:01,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 6044 Invalid, 1675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1570 Invalid, 3 Unknown, 0 Unchecked, 15.4s Time] [2022-07-19 11:00:01,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2022-07-19 11:00:01,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 1050. [2022-07-19 11:00:01,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 843 states have (on average 1.4128113879003559) internal successors, (1191), 850 states have internal predecessors, (1191), 152 states have call successors, (152), 49 states have call predecessors, (152), 54 states have return successors, (208), 150 states have call predecessors, (208), 146 states have call successors, (208) [2022-07-19 11:00:01,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 1551 transitions. [2022-07-19 11:00:01,883 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 1551 transitions. Word has length 45 [2022-07-19 11:00:01,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:00:01,884 INFO L495 AbstractCegarLoop]: Abstraction has 1050 states and 1551 transitions. [2022-07-19 11:00:01,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 11:00:01,884 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 1551 transitions. [2022-07-19 11:00:01,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-19 11:00:01,886 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:00:01,886 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:00:01,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-19 11:00:01,886 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:00:01,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:00:01,887 INFO L85 PathProgramCache]: Analyzing trace with hash 267737260, now seen corresponding path program 1 times [2022-07-19 11:00:01,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:00:01,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949530731] [2022-07-19 11:00:01,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:00:01,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:00:01,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:01,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 11:00:01,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:01,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 11:00:01,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:02,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:00:02,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:00:02,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949530731] [2022-07-19 11:00:02,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949530731] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:00:02,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:00:02,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 11:00:02,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612607634] [2022-07-19 11:00:02,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:00:02,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 11:00:02,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:00:02,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 11:00:02,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 11:00:02,016 INFO L87 Difference]: Start difference. First operand 1050 states and 1551 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 11:00:07,346 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:00:10,090 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:00:12,513 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:00:14,767 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:00:14,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:00:14,849 INFO L93 Difference]: Finished difference Result 1121 states and 1667 transitions. [2022-07-19 11:00:14,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 11:00:14,854 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 45 [2022-07-19 11:00:14,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:00:14,860 INFO L225 Difference]: With dead ends: 1121 [2022-07-19 11:00:14,861 INFO L226 Difference]: Without dead ends: 1115 [2022-07-19 11:00:14,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2022-07-19 11:00:14,862 INFO L413 NwaCegarLoop]: 809 mSDtfsCounter, 1101 mSDsluCounter, 1987 mSDsCounter, 0 mSdLazyCounter, 1050 mSolverCounterSat, 293 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1191 SdHoareTripleChecker+Valid, 2796 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 1050 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2022-07-19 11:00:14,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1191 Valid, 2796 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 1050 Invalid, 3 Unknown, 0 Unchecked, 12.7s Time] [2022-07-19 11:00:14,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2022-07-19 11:00:14,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 1050. [2022-07-19 11:00:14,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 843 states have (on average 1.4116251482799524) internal successors, (1190), 850 states have internal predecessors, (1190), 152 states have call successors, (152), 49 states have call predecessors, (152), 54 states have return successors, (208), 150 states have call predecessors, (208), 146 states have call successors, (208) [2022-07-19 11:00:14,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 1550 transitions. [2022-07-19 11:00:14,917 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 1550 transitions. Word has length 45 [2022-07-19 11:00:14,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:00:14,918 INFO L495 AbstractCegarLoop]: Abstraction has 1050 states and 1550 transitions. [2022-07-19 11:00:14,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 11:00:14,918 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 1550 transitions. [2022-07-19 11:00:14,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-19 11:00:14,920 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:00:14,920 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] [2022-07-19 11:00:14,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-19 11:00:14,920 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:00:14,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:00:14,921 INFO L85 PathProgramCache]: Analyzing trace with hash -234696471, now seen corresponding path program 1 times [2022-07-19 11:00:14,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:00:14,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211166671] [2022-07-19 11:00:14,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:00:14,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:00:14,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:15,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 11:00:15,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:15,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 11:00:15,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:15,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:00:15,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:00:15,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211166671] [2022-07-19 11:00:15,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211166671] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:00:15,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:00:15,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-19 11:00:15,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635865871] [2022-07-19 11:00:15,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:00:15,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 11:00:15,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:00:15,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 11:00:15,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-19 11:00:15,062 INFO L87 Difference]: Start difference. First operand 1050 states and 1550 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 7 states have internal predecessors, (41), 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) [2022-07-19 11:00:17,475 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:00:19,357 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:00:24,371 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:00:26,877 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:00:29,354 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:00:29,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:00:29,428 INFO L93 Difference]: Finished difference Result 1133 states and 1683 transitions. [2022-07-19 11:00:29,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 11:00:29,430 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 7 states have internal predecessors, (41), 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 46 [2022-07-19 11:00:29,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:00:29,439 INFO L225 Difference]: With dead ends: 1133 [2022-07-19 11:00:29,439 INFO L226 Difference]: Without dead ends: 1107 [2022-07-19 11:00:29,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-07-19 11:00:29,440 INFO L413 NwaCegarLoop]: 813 mSDtfsCounter, 300 mSDsluCounter, 4316 mSDsCounter, 0 mSdLazyCounter, 1316 mSolverCounterSat, 239 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 5129 SdHoareTripleChecker+Invalid, 1558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 1316 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.2s IncrementalHoareTripleChecker+Time [2022-07-19 11:00:29,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 5129 Invalid, 1558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 1316 Invalid, 3 Unknown, 0 Unchecked, 14.2s Time] [2022-07-19 11:00:29,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2022-07-19 11:00:29,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 1045. [2022-07-19 11:00:29,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 839 states have (on average 1.3945172824791419) internal successors, (1170), 846 states have internal predecessors, (1170), 151 states have call successors, (151), 49 states have call predecessors, (151), 54 states have return successors, (207), 149 states have call predecessors, (207), 145 states have call successors, (207) [2022-07-19 11:00:29,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 1528 transitions. [2022-07-19 11:00:29,499 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 1528 transitions. Word has length 46 [2022-07-19 11:00:29,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:00:29,500 INFO L495 AbstractCegarLoop]: Abstraction has 1045 states and 1528 transitions. [2022-07-19 11:00:29,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 7 states have internal predecessors, (41), 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) [2022-07-19 11:00:29,500 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 1528 transitions. [2022-07-19 11:00:29,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-19 11:00:29,502 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:00:29,502 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] [2022-07-19 11:00:29,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-19 11:00:29,502 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:00:29,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:00:29,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1831784630, now seen corresponding path program 1 times [2022-07-19 11:00:29,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:00:29,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588270650] [2022-07-19 11:00:29,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:00:29,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:00:29,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:29,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 11:00:29,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:29,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 11:00:29,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:29,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:00:29,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:00:29,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588270650] [2022-07-19 11:00:29,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588270650] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:00:29,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:00:29,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 11:00:29,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879797678] [2022-07-19 11:00:29,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:00:29,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 11:00:29,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:00:29,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 11:00:29,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 11:00:29,599 INFO L87 Difference]: Start difference. First operand 1045 states and 1528 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 3 states have internal predecessors, (41), 2 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) [2022-07-19 11:00:33,782 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:00:35,963 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:00:39,246 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:00:41,934 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:00:42,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:00:42,060 INFO L93 Difference]: Finished difference Result 1158 states and 1700 transitions. [2022-07-19 11:00:42,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 11:00:42,061 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 3 states have internal predecessors, (41), 2 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 46 [2022-07-19 11:00:42,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:00:42,065 INFO L225 Difference]: With dead ends: 1158 [2022-07-19 11:00:42,065 INFO L226 Difference]: Without dead ends: 1134 [2022-07-19 11:00:42,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-19 11:00:42,067 INFO L413 NwaCegarLoop]: 817 mSDtfsCounter, 286 mSDsluCounter, 1506 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 247 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 2323 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.4s IncrementalHoareTripleChecker+Time [2022-07-19 11:00:42,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 2323 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 649 Invalid, 4 Unknown, 0 Unchecked, 12.4s Time] [2022-07-19 11:00:42,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2022-07-19 11:00:42,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 1050. [2022-07-19 11:00:42,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 844 states have (on average 1.3945497630331753) internal successors, (1177), 851 states have internal predecessors, (1177), 151 states have call successors, (151), 49 states have call predecessors, (151), 54 states have return successors, (207), 149 states have call predecessors, (207), 145 states have call successors, (207) [2022-07-19 11:00:42,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 1535 transitions. [2022-07-19 11:00:42,125 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 1535 transitions. Word has length 46 [2022-07-19 11:00:42,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:00:42,126 INFO L495 AbstractCegarLoop]: Abstraction has 1050 states and 1535 transitions. [2022-07-19 11:00:42,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 3 states have internal predecessors, (41), 2 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) [2022-07-19 11:00:42,126 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 1535 transitions. [2022-07-19 11:00:42,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-19 11:00:42,128 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:00:42,128 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] [2022-07-19 11:00:42,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-19 11:00:42,129 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:00:42,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:00:42,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1697771124, now seen corresponding path program 1 times [2022-07-19 11:00:42,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:00:42,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572956783] [2022-07-19 11:00:42,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:00:42,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:00:42,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:42,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 11:00:42,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:42,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 11:00:42,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:42,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:00:42,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:00:42,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572956783] [2022-07-19 11:00:42,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572956783] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:00:42,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:00:42,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-19 11:00:42,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885691419] [2022-07-19 11:00:42,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:00:42,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 11:00:42,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:00:42,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 11:00:42,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-19 11:00:42,256 INFO L87 Difference]: Start difference. First operand 1050 states and 1535 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 7 states have internal predecessors, (41), 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) [2022-07-19 11:00:49,255 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:00:51,634 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:00:53,893 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:00:55,108 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:00:57,129 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:00:57,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:00:57,248 INFO L93 Difference]: Finished difference Result 1133 states and 1667 transitions. [2022-07-19 11:00:57,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 11:00:57,250 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 7 states have internal predecessors, (41), 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 46 [2022-07-19 11:00:57,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:00:57,254 INFO L225 Difference]: With dead ends: 1133 [2022-07-19 11:00:57,254 INFO L226 Difference]: Without dead ends: 1107 [2022-07-19 11:00:57,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-07-19 11:00:57,255 INFO L413 NwaCegarLoop]: 808 mSDtfsCounter, 300 mSDsluCounter, 4216 mSDsCounter, 0 mSdLazyCounter, 1320 mSolverCounterSat, 237 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 5024 SdHoareTripleChecker+Invalid, 1559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 1320 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.9s IncrementalHoareTripleChecker+Time [2022-07-19 11:00:57,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 5024 Invalid, 1559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 1320 Invalid, 2 Unknown, 0 Unchecked, 14.9s Time] [2022-07-19 11:00:57,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2022-07-19 11:00:57,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 1041. [2022-07-19 11:00:57,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1041 states, 836 states have (on average 1.3779904306220097) internal successors, (1152), 843 states have internal predecessors, (1152), 150 states have call successors, (150), 49 states have call predecessors, (150), 54 states have return successors, (206), 148 states have call predecessors, (206), 144 states have call successors, (206) [2022-07-19 11:00:57,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1041 states to 1041 states and 1508 transitions. [2022-07-19 11:00:57,308 INFO L78 Accepts]: Start accepts. Automaton has 1041 states and 1508 transitions. Word has length 46 [2022-07-19 11:00:57,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:00:57,308 INFO L495 AbstractCegarLoop]: Abstraction has 1041 states and 1508 transitions. [2022-07-19 11:00:57,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 7 states have internal predecessors, (41), 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) [2022-07-19 11:00:57,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1041 states and 1508 transitions. [2022-07-19 11:00:57,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-19 11:00:57,317 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:00:57,318 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] [2022-07-19 11:00:57,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-19 11:00:57,318 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:00:57,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:00:57,319 INFO L85 PathProgramCache]: Analyzing trace with hash 2006892282, now seen corresponding path program 1 times [2022-07-19 11:00:57,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:00:57,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741463011] [2022-07-19 11:00:57,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:00:57,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:00:57,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:57,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 11:00:57,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:57,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 11:00:57,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:57,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:00:57,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:00:57,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741463011] [2022-07-19 11:00:57,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741463011] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:00:57,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:00:57,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-19 11:00:57,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719094971] [2022-07-19 11:00:57,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:00:57,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 11:00:57,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:00:57,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 11:00:57,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-07-19 11:00:57,494 INFO L87 Difference]: Start difference. First operand 1041 states and 1508 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 8 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 11:01:05,243 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:01:06,513 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:01:08,531 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:01:10,282 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:01:12,331 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:01:12,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:01:12,879 INFO L93 Difference]: Finished difference Result 1094 states and 1595 transitions. [2022-07-19 11:01:12,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 11:01:12,881 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 8 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 48 [2022-07-19 11:01:12,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:01:12,884 INFO L225 Difference]: With dead ends: 1094 [2022-07-19 11:01:12,884 INFO L226 Difference]: Without dead ends: 1077 [2022-07-19 11:01:12,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-07-19 11:01:12,886 INFO L413 NwaCegarLoop]: 785 mSDtfsCounter, 101 mSDsluCounter, 5549 mSDsCounter, 0 mSdLazyCounter, 1703 mSolverCounterSat, 99 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 6334 SdHoareTripleChecker+Invalid, 1804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1703 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.2s IncrementalHoareTripleChecker+Time [2022-07-19 11:01:12,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 6334 Invalid, 1804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1703 Invalid, 2 Unknown, 0 Unchecked, 15.2s Time] [2022-07-19 11:01:12,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2022-07-19 11:01:12,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 1038. [2022-07-19 11:01:12,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 834 states have (on average 1.3776978417266188) internal successors, (1149), 841 states have internal predecessors, (1149), 149 states have call successors, (149), 49 states have call predecessors, (149), 54 states have return successors, (205), 147 states have call predecessors, (205), 143 states have call successors, (205) [2022-07-19 11:01:12,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 1503 transitions. [2022-07-19 11:01:12,949 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 1503 transitions. Word has length 48 [2022-07-19 11:01:12,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:01:12,949 INFO L495 AbstractCegarLoop]: Abstraction has 1038 states and 1503 transitions. [2022-07-19 11:01:12,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 8 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 11:01:12,949 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 1503 transitions. [2022-07-19 11:01:12,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-19 11:01:12,952 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:01:12,952 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] [2022-07-19 11:01:12,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-19 11:01:12,952 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:01:12,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:01:12,953 INFO L85 PathProgramCache]: Analyzing trace with hash -337810077, now seen corresponding path program 1 times [2022-07-19 11:01:12,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:01:12,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201232482] [2022-07-19 11:01:12,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:01:12,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:01:12,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:01:13,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 11:01:13,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:01:13,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-19 11:01:13,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:01:13,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 11:01:13,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:01:13,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 11:01:13,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:01:13,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:01:13,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:01:13,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201232482] [2022-07-19 11:01:13,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201232482] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:01:13,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:01:13,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 11:01:13,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603344944] [2022-07-19 11:01:13,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:01:13,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 11:01:13,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:01:13,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 11:01:13,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 11:01:13,066 INFO L87 Difference]: Start difference. First operand 1038 states and 1503 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-19 11:01:16,478 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:01:18,625 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:01:20,324 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:01:22,807 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:01:24,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:01:24,420 INFO L93 Difference]: Finished difference Result 1606 states and 2346 transitions. [2022-07-19 11:01:24,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 11:01:24,422 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 53 [2022-07-19 11:01:24,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:01:24,425 INFO L225 Difference]: With dead ends: 1606 [2022-07-19 11:01:24,425 INFO L226 Difference]: Without dead ends: 1096 [2022-07-19 11:01:24,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-07-19 11:01:24,428 INFO L413 NwaCegarLoop]: 792 mSDtfsCounter, 446 mSDsluCounter, 1964 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 342 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 2756 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 342 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2022-07-19 11:01:24,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [446 Valid, 2756 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [342 Valid, 770 Invalid, 2 Unknown, 0 Unchecked, 11.2s Time] [2022-07-19 11:01:24,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2022-07-19 11:01:24,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 1040. [2022-07-19 11:01:24,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 836 states have (on average 1.3732057416267942) internal successors, (1148), 843 states have internal predecessors, (1148), 148 states have call successors, (148), 49 states have call predecessors, (148), 55 states have return successors, (207), 147 states have call predecessors, (207), 143 states have call successors, (207) [2022-07-19 11:01:24,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 1503 transitions. [2022-07-19 11:01:24,479 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 1503 transitions. Word has length 53 [2022-07-19 11:01:24,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:01:24,480 INFO L495 AbstractCegarLoop]: Abstraction has 1040 states and 1503 transitions. [2022-07-19 11:01:24,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-19 11:01:24,480 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 1503 transitions. [2022-07-19 11:01:24,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-19 11:01:24,482 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:01:24,482 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] [2022-07-19 11:01:24,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-19 11:01:24,483 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:01:24,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:01:24,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1963103447, now seen corresponding path program 1 times [2022-07-19 11:01:24,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:01:24,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954555051] [2022-07-19 11:01:24,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:01:24,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:01:24,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:01:24,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 11:01:24,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:01:24,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 11:01:24,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:01:24,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:01:24,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:01:24,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954555051] [2022-07-19 11:01:24,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954555051] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:01:24,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:01:24,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-19 11:01:24,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396055835] [2022-07-19 11:01:24,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:01:24,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-19 11:01:24,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:01:24,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-19 11:01:24,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-07-19 11:01:24,655 INFO L87 Difference]: Start difference. First operand 1040 states and 1503 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 9 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 11:01:28,350 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:01:33,398 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:01:34,880 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:01:35,889 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:01:38,454 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:01:41,348 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:01:41,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:01:41,461 INFO L93 Difference]: Finished difference Result 1093 states and 1590 transitions. [2022-07-19 11:01:41,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 11:01:41,463 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 9 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 50 [2022-07-19 11:01:41,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:01:41,465 INFO L225 Difference]: With dead ends: 1093 [2022-07-19 11:01:41,465 INFO L226 Difference]: Without dead ends: 1076 [2022-07-19 11:01:41,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-07-19 11:01:41,466 INFO L413 NwaCegarLoop]: 789 mSDtfsCounter, 113 mSDsluCounter, 6212 mSDsCounter, 0 mSdLazyCounter, 1868 mSolverCounterSat, 97 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 7001 SdHoareTripleChecker+Invalid, 1967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1868 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.7s IncrementalHoareTripleChecker+Time [2022-07-19 11:01:41,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 7001 Invalid, 1967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1868 Invalid, 2 Unknown, 0 Unchecked, 16.7s Time] [2022-07-19 11:01:41,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2022-07-19 11:01:41,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 1037. [2022-07-19 11:01:41,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1037 states, 834 states have (on average 1.3729016786570742) internal successors, (1145), 841 states have internal predecessors, (1145), 147 states have call successors, (147), 49 states have call predecessors, (147), 55 states have return successors, (206), 146 states have call predecessors, (206), 142 states have call successors, (206) [2022-07-19 11:01:41,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 1498 transitions. [2022-07-19 11:01:41,522 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 1498 transitions. Word has length 50 [2022-07-19 11:01:41,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:01:41,523 INFO L495 AbstractCegarLoop]: Abstraction has 1037 states and 1498 transitions. [2022-07-19 11:01:41,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 9 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 11:01:41,523 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 1498 transitions. [2022-07-19 11:01:41,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-19 11:01:41,525 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:01:41,525 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] [2022-07-19 11:01:41,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-19 11:01:41,526 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:01:41,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:01:41,526 INFO L85 PathProgramCache]: Analyzing trace with hash 667442599, now seen corresponding path program 1 times [2022-07-19 11:01:41,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:01:41,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758941744] [2022-07-19 11:01:41,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:01:41,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:01:41,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:01:41,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-19 11:01:41,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:01:41,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 11:01:41,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:01:41,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:01:41,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:01:41,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758941744] [2022-07-19 11:01:41,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758941744] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:01:41,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:01:41,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-19 11:01:41,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606434965] [2022-07-19 11:01:41,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:01:41,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-19 11:01:41,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:01:41,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-19 11:01:41,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-07-19 11:01:41,688 INFO L87 Difference]: Start difference. First operand 1037 states and 1498 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 9 states have internal predecessors, (44), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 11:01:49,041 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:01:51,234 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:01:53,615 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:01:55,152 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:01:57,171 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:01:57,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:01:57,250 INFO L93 Difference]: Finished difference Result 1090 states and 1585 transitions. [2022-07-19 11:01:57,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 11:01:57,252 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 9 states have internal predecessors, (44), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 49 [2022-07-19 11:01:57,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:01:57,254 INFO L225 Difference]: With dead ends: 1090 [2022-07-19 11:01:57,254 INFO L226 Difference]: Without dead ends: 1073 [2022-07-19 11:01:57,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-07-19 11:01:57,255 INFO L413 NwaCegarLoop]: 773 mSDtfsCounter, 113 mSDsluCounter, 6113 mSDsCounter, 0 mSdLazyCounter, 1852 mSolverCounterSat, 96 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 6886 SdHoareTripleChecker+Invalid, 1951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1852 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.5s IncrementalHoareTripleChecker+Time [2022-07-19 11:01:57,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 6886 Invalid, 1951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1852 Invalid, 3 Unknown, 0 Unchecked, 15.5s Time] [2022-07-19 11:01:57,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1073 states. [2022-07-19 11:01:57,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1073 to 1034. [2022-07-19 11:01:57,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 832 states have (on average 1.3725961538461537) internal successors, (1142), 839 states have internal predecessors, (1142), 146 states have call successors, (146), 49 states have call predecessors, (146), 55 states have return successors, (205), 145 states have call predecessors, (205), 141 states have call successors, (205) [2022-07-19 11:01:57,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 1493 transitions. [2022-07-19 11:01:57,312 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 1493 transitions. Word has length 49 [2022-07-19 11:01:57,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:01:57,312 INFO L495 AbstractCegarLoop]: Abstraction has 1034 states and 1493 transitions. [2022-07-19 11:01:57,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 9 states have internal predecessors, (44), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 11:01:57,313 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 1493 transitions. [2022-07-19 11:01:57,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-19 11:01:57,315 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:01:57,315 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] [2022-07-19 11:01:57,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-19 11:01:57,316 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:01:57,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:01:57,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1895273355, now seen corresponding path program 1 times [2022-07-19 11:01:57,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:01:57,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688254718] [2022-07-19 11:01:57,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:01:57,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:01:57,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:01:57,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 11:01:57,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:01:57,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 11:01:57,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:01:57,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:01:57,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:01:57,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688254718] [2022-07-19 11:01:57,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688254718] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:01:57,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:01:57,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 11:01:57,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985607705] [2022-07-19 11:01:57,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:01:57,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 11:01:57,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:01:57,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 11:01:57,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-19 11:01:57,421 INFO L87 Difference]: Start difference. First operand 1034 states and 1493 transitions. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 4 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 11:02:01,313 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:02:03,504 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:02:04,542 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []