./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ntdrivers/cdaudio.i.cil-1.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-1.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 ad0884018313fc350052496ea1071e31a8b2c3997d36767afc87946a21697816 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 10:57:40,273 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 10:57:40,275 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 10:57:40,317 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 10:57:40,318 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 10:57:40,319 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 10:57:40,321 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 10:57:40,323 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 10:57:40,325 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 10:57:40,328 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 10:57:40,329 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 10:57:40,331 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 10:57:40,332 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 10:57:40,334 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 10:57:40,335 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 10:57:40,336 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 10:57:40,337 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 10:57:40,338 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 10:57:40,339 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 10:57:40,340 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 10:57:40,341 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 10:57:40,342 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 10:57:40,343 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 10:57:40,343 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 10:57:40,344 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 10:57:40,346 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 10:57:40,346 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 10:57:40,347 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 10:57:40,347 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 10:57:40,348 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 10:57:40,349 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 10:57:40,349 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 10:57:40,349 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 10:57:40,350 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 10:57:40,351 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 10:57:40,351 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 10:57:40,352 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 10:57:40,352 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 10:57:40,353 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 10:57:40,353 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 10:57:40,354 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 10:57:40,357 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 10:57:40,358 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 10:57:40,389 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 10:57:40,389 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 10:57:40,390 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 10:57:40,390 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 10:57:40,391 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 10:57:40,391 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 10:57:40,392 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 10:57:40,392 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 10:57:40,392 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 10:57:40,393 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 10:57:40,393 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 10:57:40,394 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 10:57:40,394 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 10:57:40,394 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 10:57:40,394 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 10:57:40,394 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 10:57:40,394 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 10:57:40,395 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 10:57:40,395 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 10:57:40,396 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 10:57:40,396 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 10:57:40,396 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 10:57:40,396 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 10:57:40,397 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 10:57:40,397 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 10:57:40,397 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 10:57:40,397 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 10:57:40,397 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 10:57:40,397 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 10:57:40,398 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 10:57:40,398 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 10:57:40,398 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 10:57:40,398 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 10:57:40,398 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ad0884018313fc350052496ea1071e31a8b2c3997d36767afc87946a21697816 [2022-07-19 10:57:40,597 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 10:57:40,614 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 10:57:40,616 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 10:57:40,617 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 10:57:40,618 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 10:57:40,619 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ntdrivers/cdaudio.i.cil-1.c [2022-07-19 10:57:40,692 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/469e84983/d5a3079f88a24949b192f673769e8a6d/FLAG05521c0b3 [2022-07-19 10:57:41,386 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 10:57:41,386 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/cdaudio.i.cil-1.c [2022-07-19 10:57:41,418 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/469e84983/d5a3079f88a24949b192f673769e8a6d/FLAG05521c0b3 [2022-07-19 10:57:41,500 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/469e84983/d5a3079f88a24949b192f673769e8a6d [2022-07-19 10:57:41,503 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 10:57:41,504 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 10:57:41,508 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 10:57:41,508 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 10:57:41,511 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 10:57:41,512 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:57:41" (1/1) ... [2022-07-19 10:57:41,513 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2831553f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:57:41, skipping insertion in model container [2022-07-19 10:57:41,513 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:57:41" (1/1) ... [2022-07-19 10:57:41,519 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 10:57:41,642 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 10:57:42,200 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-1.c[90162,90175] [2022-07-19 10:57:42,814 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 10:57:42,826 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 10:57:42,901 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-1.c[90162,90175] [2022-07-19 10:57:43,217 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 10:57:43,242 INFO L208 MainTranslator]: Completed translation [2022-07-19 10:57:43,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:57:43 WrapperNode [2022-07-19 10:57:43,243 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 10:57:43,244 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 10:57:43,244 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 10:57:43,244 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 10:57:43,250 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:57:43" (1/1) ... [2022-07-19 10:57:43,319 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:57:43" (1/1) ... [2022-07-19 10:57:43,450 INFO L137 Inliner]: procedures = 120, calls = 2195, calls flagged for inlining = 23, calls inlined = 19, statements flattened = 2336 [2022-07-19 10:57:43,451 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 10:57:43,452 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 10:57:43,452 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 10:57:43,452 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 10:57:43,459 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:57:43" (1/1) ... [2022-07-19 10:57:43,460 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:57:43" (1/1) ... [2022-07-19 10:57:43,486 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:57:43" (1/1) ... [2022-07-19 10:57:43,487 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:57:43" (1/1) ... [2022-07-19 10:57:43,555 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:57:43" (1/1) ... [2022-07-19 10:57:43,577 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:57:43" (1/1) ... [2022-07-19 10:57:43,593 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:57:43" (1/1) ... [2022-07-19 10:57:43,616 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 10:57:43,618 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 10:57:43,618 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 10:57:43,618 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 10:57:43,620 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:57:43" (1/1) ... [2022-07-19 10:57:43,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 10:57:43,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:57:43,653 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 10:57:43,679 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 10:57:43,701 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-07-19 10:57:43,701 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-07-19 10:57:43,701 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-07-19 10:57:43,701 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 10:57:43,701 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2022-07-19 10:57:43,701 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2022-07-19 10:57:43,702 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-07-19 10:57:43,702 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-07-19 10:57:43,702 INFO L130 BoogieDeclarations]: Found specification of procedure MmLockPagableDataSection [2022-07-19 10:57:43,702 INFO L138 BoogieDeclarations]: Found implementation of procedure MmLockPagableDataSection [2022-07-19 10:57:43,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 10:57:43,702 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioIsPlayActive [2022-07-19 10:57:43,702 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioIsPlayActive [2022-07-19 10:57:43,703 INFO L130 BoogieDeclarations]: Found specification of procedure IoOpenDeviceRegistryKey [2022-07-19 10:57:43,703 INFO L138 BoogieDeclarations]: Found implementation of procedure IoOpenDeviceRegistryKey [2022-07-19 10:57:43,703 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2022-07-19 10:57:43,703 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2022-07-19 10:57:43,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-07-19 10:57:43,703 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-07-19 10:57:43,704 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_malloc [2022-07-19 10:57:43,704 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_malloc [2022-07-19 10:57:43,704 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2022-07-19 10:57:43,704 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2022-07-19 10:57:43,704 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-19 10:57:43,704 INFO L130 BoogieDeclarations]: Found specification of procedure ZwClose [2022-07-19 10:57:43,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ZwClose [2022-07-19 10:57:43,704 INFO L130 BoogieDeclarations]: Found specification of procedure SendSrbSynchronous [2022-07-19 10:57:43,705 INFO L138 BoogieDeclarations]: Found implementation of procedure SendSrbSynchronous [2022-07-19 10:57:43,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 10:57:43,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-19 10:57:43,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 10:57:43,705 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2022-07-19 10:57:43,705 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2022-07-19 10:57:43,706 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-07-19 10:57:43,706 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-19 10:57:43,706 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2022-07-19 10:57:43,706 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2022-07-19 10:57:43,706 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSignalCompletion [2022-07-19 10:57:43,706 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSignalCompletion [2022-07-19 10:57:43,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 10:57:43,707 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2022-07-19 10:57:43,707 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2022-07-19 10:57:43,707 INFO L130 BoogieDeclarations]: Found specification of procedure HPCdrCompletion [2022-07-19 10:57:43,707 INFO L138 BoogieDeclarations]: Found implementation of procedure HPCdrCompletion [2022-07-19 10:57:43,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 10:57:43,707 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSendToNextDriver [2022-07-19 10:57:43,708 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSendToNextDriver [2022-07-19 10:57:43,708 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-07-19 10:57:43,708 INFO L130 BoogieDeclarations]: Found specification of procedure ExAllocatePoolWithTag [2022-07-19 10:57:43,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ExAllocatePoolWithTag [2022-07-19 10:57:43,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 10:57:43,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 10:57:43,709 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioForwardIrpSynchronous [2022-07-19 10:57:43,709 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioForwardIrpSynchronous [2022-07-19 10:57:44,093 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 10:57:44,094 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 10:57:44,274 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:57:44,287 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2022-07-19 10:57:44,288 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2022-07-19 10:57:44,644 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:57:44,681 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume !false; [2022-07-19 10:57:44,681 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume false; [2022-07-19 10:57:44,697 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:57:44,698 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:57:44,699 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:57:44,707 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:57:44,714 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:57:44,720 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:57:55,844 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##276: assume false; [2022-07-19 10:57:55,845 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##277: assume !false; [2022-07-19 10:57:55,845 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##504: assume !false; [2022-07-19 10:57:55,845 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##503: assume false; [2022-07-19 10:57:55,845 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint L3709: CdAudioPnp_#res#1 := 0; [2022-07-19 10:57:55,846 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##172: assume !false; [2022-07-19 10:57:55,846 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##171: assume false; [2022-07-19 10:57:55,846 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##65: assume !false; [2022-07-19 10:57:55,846 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##64: assume false; [2022-07-19 10:57:55,846 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##43: assume !false; [2022-07-19 10:57:55,846 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##42: assume false; [2022-07-19 10:57:55,847 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##32: assume false; [2022-07-19 10:57:55,847 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##33: assume !false; [2022-07-19 10:57:55,896 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-19 10:57:55,901 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-07-19 10:57:55,901 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-07-19 10:57:55,923 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 10:57:55,939 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 10:57:55,939 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-07-19 10:57:55,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:57:55 BoogieIcfgContainer [2022-07-19 10:57:55,942 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 10:57:55,944 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 10:57:55,945 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 10:57:55,948 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 10:57:55,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 10:57:41" (1/3) ... [2022-07-19 10:57:55,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bc1d31d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:57:55, skipping insertion in model container [2022-07-19 10:57:55,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:57:43" (2/3) ... [2022-07-19 10:57:55,950 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bc1d31d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:57:55, skipping insertion in model container [2022-07-19 10:57:55,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:57:55" (3/3) ... [2022-07-19 10:57:55,951 INFO L111 eAbstractionObserver]: Analyzing ICFG cdaudio.i.cil-1.c [2022-07-19 10:57:55,966 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 10:57:55,967 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 10:57:56,028 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 10:57:56,034 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@7dc9c38b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5c89383a [2022-07-19 10:57:56,034 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 10:57:56,040 INFO L276 IsEmpty]: Start isEmpty. Operand has 625 states, 491 states have (on average 1.5274949083503055) internal successors, (750), 510 states have internal predecessors, (750), 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 10:57:56,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-19 10:57:56,046 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:57:56,046 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:57:56,046 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:57:56,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:57:56,050 INFO L85 PathProgramCache]: Analyzing trace with hash 678118687, now seen corresponding path program 1 times [2022-07-19 10:57:56,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:57:56,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555263657] [2022-07-19 10:57:56,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:57:56,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:57:56,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:57:56,396 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 10:57:56,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:57:56,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555263657] [2022-07-19 10:57:56,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555263657] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:57:56,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:57:56,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 10:57:56,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822750094] [2022-07-19 10:57:56,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:57:56,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 10:57:56,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:57:56,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 10:57:56,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 10:57:56,444 INFO L87 Difference]: Start difference. First operand has 625 states, 491 states have (on average 1.5274949083503055) internal successors, (750), 510 states have internal predecessors, (750), 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 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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 10:57:56,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:57:56,551 INFO L93 Difference]: Finished difference Result 1244 states and 1994 transitions. [2022-07-19 10:57:56,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 10:57:56,553 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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 19 [2022-07-19 10:57:56,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:57:56,571 INFO L225 Difference]: With dead ends: 1244 [2022-07-19 10:57:56,572 INFO L226 Difference]: Without dead ends: 618 [2022-07-19 10:57:56,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 10:57:56,588 INFO L413 NwaCegarLoop]: 943 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 943 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:57:56,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 943 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:57:56,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2022-07-19 10:57:56,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 618. [2022-07-19 10:57:56,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 486 states have (on average 1.4835390946502058) internal successors, (721), 503 states have internal predecessors, (721), 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 10:57:56,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 931 transitions. [2022-07-19 10:57:56,691 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 931 transitions. Word has length 19 [2022-07-19 10:57:56,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:57:56,691 INFO L495 AbstractCegarLoop]: Abstraction has 618 states and 931 transitions. [2022-07-19 10:57:56,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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 10:57:56,692 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 931 transitions. [2022-07-19 10:57:56,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-19 10:57:56,693 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:57:56,693 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:57:56,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 10:57:56,694 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:57:56,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:57:56,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1841730419, now seen corresponding path program 1 times [2022-07-19 10:57:56,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:57:56,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390911541] [2022-07-19 10:57:56,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:57:56,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:57:56,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:57:56,829 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 10:57:56,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:57:56,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390911541] [2022-07-19 10:57:56,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390911541] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:57:56,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:57:56,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 10:57:56,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610239746] [2022-07-19 10:57:56,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:57:56,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 10:57:56,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:57:56,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 10:57:56,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 10:57:56,833 INFO L87 Difference]: Start difference. First operand 618 states and 931 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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 10:57:56,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:57:56,919 INFO L93 Difference]: Finished difference Result 637 states and 956 transitions. [2022-07-19 10:57:56,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 10:57:56,919 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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 19 [2022-07-19 10:57:56,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:57:56,923 INFO L225 Difference]: With dead ends: 637 [2022-07-19 10:57:56,923 INFO L226 Difference]: Without dead ends: 618 [2022-07-19 10:57:56,924 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 10:57:56,925 INFO L413 NwaCegarLoop]: 929 mSDtfsCounter, 16 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 1797 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:57:56,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 1797 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:57:56,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2022-07-19 10:57:56,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 618. [2022-07-19 10:57:56,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 486 states have (on average 1.4814814814814814) internal successors, (720), 503 states have internal predecessors, (720), 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 10:57:56,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 930 transitions. [2022-07-19 10:57:56,946 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 930 transitions. Word has length 19 [2022-07-19 10:57:56,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:57:56,946 INFO L495 AbstractCegarLoop]: Abstraction has 618 states and 930 transitions. [2022-07-19 10:57:56,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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 10:57:56,947 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 930 transitions. [2022-07-19 10:57:56,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-19 10:57:56,948 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:57:56,948 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] [2022-07-19 10:57:56,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 10:57:56,948 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:57:56,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:57:56,949 INFO L85 PathProgramCache]: Analyzing trace with hash -948115898, now seen corresponding path program 1 times [2022-07-19 10:57:56,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:57:56,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405380431] [2022-07-19 10:57:56,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:57:56,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:57:56,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:57:57,022 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 10:57:57,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:57:57,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405380431] [2022-07-19 10:57:57,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405380431] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:57:57,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:57:57,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 10:57:57,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957942870] [2022-07-19 10:57:57,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:57:57,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 10:57:57,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:57:57,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 10:57:57,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 10:57:57,026 INFO L87 Difference]: Start difference. First operand 618 states and 930 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, (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 10:57:57,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:57:57,191 INFO L93 Difference]: Finished difference Result 1147 states and 1711 transitions. [2022-07-19 10:57:57,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 10:57:57,192 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, (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 21 [2022-07-19 10:57:57,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:57:57,198 INFO L225 Difference]: With dead ends: 1147 [2022-07-19 10:57:57,198 INFO L226 Difference]: Without dead ends: 898 [2022-07-19 10:57:57,199 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 10:57:57,200 INFO L413 NwaCegarLoop]: 1261 mSDtfsCounter, 844 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 844 SdHoareTripleChecker+Valid, 1685 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 10:57:57,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [844 Valid, 1685 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:57:57,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2022-07-19 10:57:57,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 879. [2022-07-19 10:57:57,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 704 states have (on average 1.4602272727272727) internal successors, (1028), 707 states have internal predecessors, (1028), 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 10:57:57,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1316 transitions. [2022-07-19 10:57:57,232 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1316 transitions. Word has length 21 [2022-07-19 10:57:57,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:57:57,232 INFO L495 AbstractCegarLoop]: Abstraction has 879 states and 1316 transitions. [2022-07-19 10:57:57,232 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, (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 10:57:57,233 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1316 transitions. [2022-07-19 10:57:57,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-19 10:57:57,240 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:57:57,240 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] [2022-07-19 10:57:57,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 10:57:57,241 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:57:57,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:57:57,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1453767215, now seen corresponding path program 1 times [2022-07-19 10:57:57,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:57:57,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541896753] [2022-07-19 10:57:57,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:57:57,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:57:57,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:57:57,313 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 10:57:57,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:57:57,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541896753] [2022-07-19 10:57:57,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541896753] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:57:57,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:57:57,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 10:57:57,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050787543] [2022-07-19 10:57:57,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:57:57,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 10:57:57,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:57:57,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 10:57:57,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 10:57:57,316 INFO L87 Difference]: Start difference. First operand 879 states and 1316 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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 10:57:57,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:57:57,452 INFO L93 Difference]: Finished difference Result 1871 states and 2863 transitions. [2022-07-19 10:57:57,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 10:57:57,453 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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 28 [2022-07-19 10:57:57,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:57:57,461 INFO L225 Difference]: With dead ends: 1871 [2022-07-19 10:57:57,461 INFO L226 Difference]: Without dead ends: 1460 [2022-07-19 10:57:57,463 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 10:57:57,464 INFO L413 NwaCegarLoop]: 1461 mSDtfsCounter, 585 mSDsluCounter, 876 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 2337 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 10:57:57,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [585 Valid, 2337 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:57:57,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2022-07-19 10:57:57,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1058. [2022-07-19 10:57:57,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 841 states have (on average 1.44589774078478) internal successors, (1216), 843 states have internal predecessors, (1216), 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 10:57:57,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 1603 transitions. [2022-07-19 10:57:57,508 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 1603 transitions. Word has length 28 [2022-07-19 10:57:57,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:57:57,509 INFO L495 AbstractCegarLoop]: Abstraction has 1058 states and 1603 transitions. [2022-07-19 10:57:57,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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 10:57:57,509 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 1603 transitions. [2022-07-19 10:57:57,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-19 10:57:57,510 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:57:57,510 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] [2022-07-19 10:57:57,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 10:57:57,511 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:57:57,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:57:57,512 INFO L85 PathProgramCache]: Analyzing trace with hash -720563744, now seen corresponding path program 1 times [2022-07-19 10:57:57,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:57:57,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592500347] [2022-07-19 10:57:57,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:57:57,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:57:57,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:57:57,596 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 10:57:57,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:57:57,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592500347] [2022-07-19 10:57:57,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592500347] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:57:57,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:57:57,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 10:57:57,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177033704] [2022-07-19 10:57:57,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:57:57,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 10:57:57,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:57:57,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 10:57:57,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 10:57:57,599 INFO L87 Difference]: Start difference. First operand 1058 states and 1603 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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 10:57:57,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:57:57,647 INFO L93 Difference]: Finished difference Result 1734 states and 2579 transitions. [2022-07-19 10:57:57,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 10:57:57,648 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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 28 [2022-07-19 10:57:57,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:57:57,656 INFO L225 Difference]: With dead ends: 1734 [2022-07-19 10:57:57,656 INFO L226 Difference]: Without dead ends: 1602 [2022-07-19 10:57:57,657 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 10:57:57,658 INFO L413 NwaCegarLoop]: 1145 mSDtfsCounter, 847 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 847 SdHoareTripleChecker+Valid, 1553 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 10:57:57,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [847 Valid, 1553 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:57:57,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1602 states. [2022-07-19 10:57:57,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1602 to 1541. [2022-07-19 10:57:57,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1541 states, 1237 states have (on average 1.4470493128536783) internal successors, (1790), 1235 states have internal predecessors, (1790), 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 10:57:57,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1541 states to 1541 states and 2315 transitions. [2022-07-19 10:57:57,714 INFO L78 Accepts]: Start accepts. Automaton has 1541 states and 2315 transitions. Word has length 28 [2022-07-19 10:57:57,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:57:57,714 INFO L495 AbstractCegarLoop]: Abstraction has 1541 states and 2315 transitions. [2022-07-19 10:57:57,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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 10:57:57,715 INFO L276 IsEmpty]: Start isEmpty. Operand 1541 states and 2315 transitions. [2022-07-19 10:57:57,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-19 10:57:57,716 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:57:57,716 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] [2022-07-19 10:57:57,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 10:57:57,716 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:57:57,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:57:57,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1878054380, now seen corresponding path program 1 times [2022-07-19 10:57:57,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:57:57,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603471254] [2022-07-19 10:57:57,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:57:57,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:57:57,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:57:57,824 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 10:57:57,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:57:57,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603471254] [2022-07-19 10:57:57,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603471254] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:57:57,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:57:57,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 10:57:57,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693558801] [2022-07-19 10:57:57,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:57:57,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 10:57:57,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:57:57,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 10:57:57,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 10:57:57,827 INFO L87 Difference]: Start difference. First operand 1541 states and 2315 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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 10:57:58,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:57:58,419 INFO L93 Difference]: Finished difference Result 2750 states and 4167 transitions. [2022-07-19 10:57:58,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 10:57:58,420 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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 29 [2022-07-19 10:57:58,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:57:58,429 INFO L225 Difference]: With dead ends: 2750 [2022-07-19 10:57:58,429 INFO L226 Difference]: Without dead ends: 1839 [2022-07-19 10:57:58,432 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 10:57:58,433 INFO L413 NwaCegarLoop]: 1159 mSDtfsCounter, 1452 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 348 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1454 SdHoareTripleChecker+Valid, 1481 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 348 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 10:57:58,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1454 Valid, 1481 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [348 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 10:57:58,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1839 states. [2022-07-19 10:57:58,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1839 to 1529. [2022-07-19 10:57:58,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1227 states have (on average 1.4441727791361043) internal successors, (1772), 1225 states have internal predecessors, (1772), 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 10:57:58,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 2291 transitions. [2022-07-19 10:57:58,493 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 2291 transitions. Word has length 29 [2022-07-19 10:57:58,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:57:58,493 INFO L495 AbstractCegarLoop]: Abstraction has 1529 states and 2291 transitions. [2022-07-19 10:57:58,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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 10:57:58,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 2291 transitions. [2022-07-19 10:57:58,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-19 10:57:58,494 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:57:58,495 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] [2022-07-19 10:57:58,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 10:57:58,495 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:57:58,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:57:58,496 INFO L85 PathProgramCache]: Analyzing trace with hash 322594645, now seen corresponding path program 1 times [2022-07-19 10:57:58,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:57:58,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399076411] [2022-07-19 10:57:58,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:57:58,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:57:58,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:57:58,556 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 10:57:58,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:57:58,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399076411] [2022-07-19 10:57:58,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399076411] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:57:58,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:57:58,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 10:57:58,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002025945] [2022-07-19 10:57:58,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:57:58,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 10:57:58,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:57:58,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 10:57:58,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 10:57:58,559 INFO L87 Difference]: Start difference. First operand 1529 states and 2291 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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 10:57:58,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:57:58,635 INFO L93 Difference]: Finished difference Result 1532 states and 2293 transitions. [2022-07-19 10:57:58,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 10:57:58,636 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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 28 [2022-07-19 10:57:58,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:57:58,643 INFO L225 Difference]: With dead ends: 1532 [2022-07-19 10:57:58,644 INFO L226 Difference]: Without dead ends: 1528 [2022-07-19 10:57:58,644 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 10:57:58,645 INFO L413 NwaCegarLoop]: 889 mSDtfsCounter, 34 mSDsluCounter, 832 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1721 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:57:58,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 1721 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:57:58,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1528 states. [2022-07-19 10:57:58,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1528 to 1528. [2022-07-19 10:57:58,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1528 states, 1227 states have (on average 1.4425427872860637) internal successors, (1770), 1224 states have internal predecessors, (1770), 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 10:57:58,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1528 states to 1528 states and 2288 transitions. [2022-07-19 10:57:58,730 INFO L78 Accepts]: Start accepts. Automaton has 1528 states and 2288 transitions. Word has length 28 [2022-07-19 10:57:58,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:57:58,730 INFO L495 AbstractCegarLoop]: Abstraction has 1528 states and 2288 transitions. [2022-07-19 10:57:58,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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 10:57:58,731 INFO L276 IsEmpty]: Start isEmpty. Operand 1528 states and 2288 transitions. [2022-07-19 10:57:58,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-19 10:57:58,732 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:57:58,733 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:57:58,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 10:57:58,733 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:57:58,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:57:58,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1553595828, now seen corresponding path program 1 times [2022-07-19 10:57:58,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:57:58,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304089848] [2022-07-19 10:57:58,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:57:58,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:57:58,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:57:58,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 10:57:58,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:57:58,847 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 10:57:58,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:57:58,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304089848] [2022-07-19 10:57:58,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304089848] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:57:58,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:57:58,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 10:57:58,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595146765] [2022-07-19 10:57:58,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:57:58,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 10:57:58,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:57:58,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 10:57:58,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:57:58,856 INFO L87 Difference]: Start difference. First operand 1528 states and 2288 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 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 10:58:03,256 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 10:58:05,526 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:58:08,264 WARN L534 Checker$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 10:58:09,466 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:58:10,586 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:58:10,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:58:10,657 INFO L93 Difference]: Finished difference Result 2372 states and 3499 transitions. [2022-07-19 10:58:10,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 10:58:10,659 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 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 41 [2022-07-19 10:58:10,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:58:10,665 INFO L225 Difference]: With dead ends: 2372 [2022-07-19 10:58:10,665 INFO L226 Difference]: Without dead ends: 1287 [2022-07-19 10:58:10,667 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 10:58:10,667 INFO L413 NwaCegarLoop]: 995 mSDtfsCounter, 791 mSDsluCounter, 1623 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 283 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 794 SdHoareTripleChecker+Valid, 2618 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.7s IncrementalHoareTripleChecker+Time [2022-07-19 10:58:10,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [794 Valid, 2618 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 486 Invalid, 3 Unknown, 0 Unchecked, 11.7s Time] [2022-07-19 10:58:10,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2022-07-19 10:58:10,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 1145. [2022-07-19 10:58:10,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1145 states, 920 states have (on average 1.4217391304347826) internal successors, (1308), 919 states have internal predecessors, (1308), 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 10:58:10,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1145 states to 1145 states and 1686 transitions. [2022-07-19 10:58:10,732 INFO L78 Accepts]: Start accepts. Automaton has 1145 states and 1686 transitions. Word has length 41 [2022-07-19 10:58:10,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:58:10,732 INFO L495 AbstractCegarLoop]: Abstraction has 1145 states and 1686 transitions. [2022-07-19 10:58:10,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 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 10:58:10,733 INFO L276 IsEmpty]: Start isEmpty. Operand 1145 states and 1686 transitions. [2022-07-19 10:58:10,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-19 10:58:10,737 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:58:10,737 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:58:10,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 10:58:10,738 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:58:10,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:58:10,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1070706914, now seen corresponding path program 1 times [2022-07-19 10:58:10,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:58:10,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984513198] [2022-07-19 10:58:10,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:58:10,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:58:10,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:10,839 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 10:58:10,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:58:10,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984513198] [2022-07-19 10:58:10,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984513198] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:58:10,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:58:10,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 10:58:10,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282463445] [2022-07-19 10:58:10,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:58:10,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 10:58:10,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:58:10,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 10:58:10,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 10:58:10,842 INFO L87 Difference]: Start difference. First operand 1145 states and 1686 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 10:58:11,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:58:11,272 INFO L93 Difference]: Finished difference Result 1206 states and 1766 transitions. [2022-07-19 10:58:11,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 10:58:11,272 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 37 [2022-07-19 10:58:11,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:58:11,278 INFO L225 Difference]: With dead ends: 1206 [2022-07-19 10:58:11,279 INFO L226 Difference]: Without dead ends: 1162 [2022-07-19 10:58:11,280 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 10:58:11,280 INFO L413 NwaCegarLoop]: 885 mSDtfsCounter, 922 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 922 SdHoareTripleChecker+Valid, 1546 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 10:58:11,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [922 Valid, 1546 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 10:58:11,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2022-07-19 10:58:11,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1145. [2022-07-19 10:58:11,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1145 states, 920 states have (on average 1.4195652173913043) internal successors, (1306), 919 states have internal predecessors, (1306), 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 10:58:11,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1145 states to 1145 states and 1684 transitions. [2022-07-19 10:58:11,324 INFO L78 Accepts]: Start accepts. Automaton has 1145 states and 1684 transitions. Word has length 37 [2022-07-19 10:58:11,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:58:11,324 INFO L495 AbstractCegarLoop]: Abstraction has 1145 states and 1684 transitions. [2022-07-19 10:58:11,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 10:58:11,325 INFO L276 IsEmpty]: Start isEmpty. Operand 1145 states and 1684 transitions. [2022-07-19 10:58:11,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-19 10:58:11,327 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:58:11,327 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] [2022-07-19 10:58:11,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-19 10:58:11,327 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:58:11,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:58:11,328 INFO L85 PathProgramCache]: Analyzing trace with hash -117279878, now seen corresponding path program 1 times [2022-07-19 10:58:11,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:58:11,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627183814] [2022-07-19 10:58:11,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:58:11,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:58:11,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:11,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-19 10:58:11,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:11,431 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 10:58:11,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:58:11,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627183814] [2022-07-19 10:58:11,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627183814] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:58:11,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:58:11,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 10:58:11,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575610361] [2022-07-19 10:58:11,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:58:11,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 10:58:11,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:58:11,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 10:58:11,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 10:58:11,434 INFO L87 Difference]: Start difference. First operand 1145 states and 1684 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 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 10:58:15,245 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:58:16,962 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:58:19,425 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:58:22,124 WARN L534 Checker$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 10:58:22,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:58:22,214 INFO L93 Difference]: Finished difference Result 1841 states and 2715 transitions. [2022-07-19 10:58:22,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 10:58:22,216 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 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 42 [2022-07-19 10:58:22,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:58:22,221 INFO L225 Difference]: With dead ends: 1841 [2022-07-19 10:58:22,222 INFO L226 Difference]: Without dead ends: 1201 [2022-07-19 10:58:22,224 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 10:58:22,224 INFO L413 NwaCegarLoop]: 871 mSDtfsCounter, 930 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 136 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 990 SdHoareTripleChecker+Valid, 1285 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2022-07-19 10:58:22,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [990 Valid, 1285 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 323 Invalid, 3 Unknown, 0 Unchecked, 10.7s Time] [2022-07-19 10:58:22,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2022-07-19 10:58:22,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 1142. [2022-07-19 10:58:22,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 918 states have (on average 1.411764705882353) internal successors, (1296), 916 states have internal predecessors, (1296), 162 states have call successors, (162), 55 states have call predecessors, (162), 61 states have return successors, (215), 170 states have call predecessors, (215), 155 states have call successors, (215) [2022-07-19 10:58:22,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 1673 transitions. [2022-07-19 10:58:22,272 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 1673 transitions. Word has length 42 [2022-07-19 10:58:22,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:58:22,272 INFO L495 AbstractCegarLoop]: Abstraction has 1142 states and 1673 transitions. [2022-07-19 10:58:22,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 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 10:58:22,273 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 1673 transitions. [2022-07-19 10:58:22,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-19 10:58:22,289 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:58:22,290 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] [2022-07-19 10:58:22,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-19 10:58:22,290 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:58:22,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:58:22,291 INFO L85 PathProgramCache]: Analyzing trace with hash 487863225, now seen corresponding path program 1 times [2022-07-19 10:58:22,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:58:22,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157180043] [2022-07-19 10:58:22,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:58:22,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:58:22,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:22,381 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 10:58:22,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:58:22,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157180043] [2022-07-19 10:58:22,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157180043] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:58:22,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:58:22,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 10:58:22,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440661395] [2022-07-19 10:58:22,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:58:22,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 10:58:22,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:58:22,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 10:58:22,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 10:58:22,384 INFO L87 Difference]: Start difference. First operand 1142 states and 1673 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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 10:58:22,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:58:22,867 INFO L93 Difference]: Finished difference Result 1456 states and 2130 transitions. [2022-07-19 10:58:22,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 10:58:22,868 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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 39 [2022-07-19 10:58:22,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:58:22,874 INFO L225 Difference]: With dead ends: 1456 [2022-07-19 10:58:22,874 INFO L226 Difference]: Without dead ends: 1447 [2022-07-19 10:58:22,875 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 10:58:22,876 INFO L413 NwaCegarLoop]: 1208 mSDtfsCounter, 1170 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1172 SdHoareTripleChecker+Valid, 1873 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 10:58:22,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1172 Valid, 1873 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 10:58:22,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1447 states. [2022-07-19 10:58:22,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1447 to 1182. [2022-07-19 10:58:22,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1182 states, 955 states have (on average 1.4020942408376964) internal successors, (1339), 946 states have internal predecessors, (1339), 162 states have call successors, (162), 55 states have call predecessors, (162), 64 states have return successors, (225), 180 states have call predecessors, (225), 155 states have call successors, (225) [2022-07-19 10:58:22,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 1726 transitions. [2022-07-19 10:58:22,930 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 1726 transitions. Word has length 39 [2022-07-19 10:58:22,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:58:22,931 INFO L495 AbstractCegarLoop]: Abstraction has 1182 states and 1726 transitions. [2022-07-19 10:58:22,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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 10:58:22,931 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 1726 transitions. [2022-07-19 10:58:22,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-19 10:58:22,933 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:58:22,933 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] [2022-07-19 10:58:22,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-19 10:58:22,933 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:58:22,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:58:22,934 INFO L85 PathProgramCache]: Analyzing trace with hash 487586395, now seen corresponding path program 1 times [2022-07-19 10:58:22,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:58:22,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173131979] [2022-07-19 10:58:22,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:58:22,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:58:22,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:22,998 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 10:58:22,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:58:22,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173131979] [2022-07-19 10:58:22,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173131979] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:58:22,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:58:22,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 10:58:22,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98234637] [2022-07-19 10:58:22,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:58:23,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 10:58:23,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:58:23,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 10:58:23,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 10:58:23,001 INFO L87 Difference]: Start difference. First operand 1182 states and 1726 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 10:58:23,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:58:23,050 INFO L93 Difference]: Finished difference Result 1204 states and 1757 transitions. [2022-07-19 10:58:23,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 10:58:23,051 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 39 [2022-07-19 10:58:23,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:58:23,057 INFO L225 Difference]: With dead ends: 1204 [2022-07-19 10:58:23,057 INFO L226 Difference]: Without dead ends: 1176 [2022-07-19 10:58:23,058 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 10:58:23,058 INFO L413 NwaCegarLoop]: 882 mSDtfsCounter, 876 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 876 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:58:23,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [876 Valid, 882 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:58:23,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2022-07-19 10:58:23,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 1149. [2022-07-19 10:58:23,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1149 states, 925 states have (on average 1.4075675675675676) internal successors, (1302), 923 states have internal predecessors, (1302), 161 states have call successors, (161), 55 states have call predecessors, (161), 62 states have return successors, (216), 170 states have call predecessors, (216), 155 states have call successors, (216) [2022-07-19 10:58:23,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 1679 transitions. [2022-07-19 10:58:23,112 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 1679 transitions. Word has length 39 [2022-07-19 10:58:23,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:58:23,113 INFO L495 AbstractCegarLoop]: Abstraction has 1149 states and 1679 transitions. [2022-07-19 10:58:23,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 10:58:23,113 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 1679 transitions. [2022-07-19 10:58:23,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-19 10:58:23,115 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:58:23,115 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] [2022-07-19 10:58:23,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-19 10:58:23,115 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:58:23,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:58:23,116 INFO L85 PathProgramCache]: Analyzing trace with hash 473241486, now seen corresponding path program 1 times [2022-07-19 10:58:23,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:58:23,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153332293] [2022-07-19 10:58:23,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:58:23,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:58:23,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:23,199 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 10:58:23,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:58:23,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153332293] [2022-07-19 10:58:23,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153332293] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:58:23,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:58:23,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 10:58:23,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954941590] [2022-07-19 10:58:23,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:58:23,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 10:58:23,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:58:23,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 10:58:23,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 10:58:23,202 INFO L87 Difference]: Start difference. First operand 1149 states and 1679 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 10:58:23,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:58:23,303 INFO L93 Difference]: Finished difference Result 1421 states and 2077 transitions. [2022-07-19 10:58:23,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 10:58:23,304 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 39 [2022-07-19 10:58:23,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:58:23,310 INFO L225 Difference]: With dead ends: 1421 [2022-07-19 10:58:23,310 INFO L226 Difference]: Without dead ends: 1412 [2022-07-19 10:58:23,310 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 10:58:23,311 INFO L413 NwaCegarLoop]: 1207 mSDtfsCounter, 356 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 2040 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:58:23,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 2040 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:58:23,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2022-07-19 10:58:23,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1147. [2022-07-19 10:58:23,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 923 states have (on average 1.4062838569880824) internal successors, (1298), 921 states have internal predecessors, (1298), 161 states have call successors, (161), 55 states have call predecessors, (161), 62 states have return successors, (216), 170 states have call predecessors, (216), 155 states have call successors, (216) [2022-07-19 10:58:23,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1675 transitions. [2022-07-19 10:58:23,366 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1675 transitions. Word has length 39 [2022-07-19 10:58:23,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:58:23,367 INFO L495 AbstractCegarLoop]: Abstraction has 1147 states and 1675 transitions. [2022-07-19 10:58:23,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 10:58:23,367 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1675 transitions. [2022-07-19 10:58:23,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-19 10:58:23,368 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:58:23,368 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, 1, 1, 1] [2022-07-19 10:58:23,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-19 10:58:23,369 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:58:23,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:58:23,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1047230606, now seen corresponding path program 1 times [2022-07-19 10:58:23,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:58:23,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601337993] [2022-07-19 10:58:23,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:58:23,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:58:23,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:23,440 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 10:58:23,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:58:23,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601337993] [2022-07-19 10:58:23,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601337993] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:58:23,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:58:23,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 10:58:23,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142024774] [2022-07-19 10:58:23,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:58:23,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 10:58:23,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:58:23,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 10:58:23,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 10:58:23,443 INFO L87 Difference]: Start difference. First operand 1147 states and 1675 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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 10:58:23,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:58:23,825 INFO L93 Difference]: Finished difference Result 1177 states and 1707 transitions. [2022-07-19 10:58:23,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 10:58:23,826 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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 39 [2022-07-19 10:58:23,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:58:23,831 INFO L225 Difference]: With dead ends: 1177 [2022-07-19 10:58:23,831 INFO L226 Difference]: Without dead ends: 1130 [2022-07-19 10:58:23,832 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 10:58:23,833 INFO L413 NwaCegarLoop]: 871 mSDtfsCounter, 888 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 1523 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 10:58:23,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [888 Valid, 1523 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 10:58:23,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1130 states. [2022-07-19 10:58:23,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1130 to 1118. [2022-07-19 10:58:23,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 897 states have (on average 1.411371237458194) internal successors, (1266), 901 states have internal predecessors, (1266), 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 10:58:23,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 1632 transitions. [2022-07-19 10:58:23,890 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 1632 transitions. Word has length 39 [2022-07-19 10:58:23,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:58:23,890 INFO L495 AbstractCegarLoop]: Abstraction has 1118 states and 1632 transitions. [2022-07-19 10:58:23,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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 10:58:23,891 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 1632 transitions. [2022-07-19 10:58:23,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-19 10:58:23,892 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:58:23,892 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] [2022-07-19 10:58:23,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-19 10:58:23,893 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:58:23,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:58:23,893 INFO L85 PathProgramCache]: Analyzing trace with hash -2056214186, now seen corresponding path program 1 times [2022-07-19 10:58:23,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:58:23,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941219043] [2022-07-19 10:58:23,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:58:23,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:58:23,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:23,999 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 10:58:23,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:58:24,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941219043] [2022-07-19 10:58:24,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941219043] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:58:24,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:58:24,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 10:58:24,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015406245] [2022-07-19 10:58:24,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:58:24,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 10:58:24,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:58:24,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 10:58:24,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 10:58:24,002 INFO L87 Difference]: Start difference. First operand 1118 states and 1632 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 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 10:58:24,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:58:24,143 INFO L93 Difference]: Finished difference Result 1130 states and 1644 transitions. [2022-07-19 10:58:24,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 10:58:24,144 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 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 40 [2022-07-19 10:58:24,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:58:24,149 INFO L225 Difference]: With dead ends: 1130 [2022-07-19 10:58:24,149 INFO L226 Difference]: Without dead ends: 1102 [2022-07-19 10:58:24,151 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 10:58:24,152 INFO L413 NwaCegarLoop]: 878 mSDtfsCounter, 34 mSDsluCounter, 3465 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 4343 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:58:24,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 4343 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:58:24,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2022-07-19 10:58:24,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 1102. [2022-07-19 10:58:24,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 881 states have (on average 1.4154370034052213) internal successors, (1247), 885 states have internal predecessors, (1247), 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 10:58:24,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 1613 transitions. [2022-07-19 10:58:24,206 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 1613 transitions. Word has length 40 [2022-07-19 10:58:24,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:58:24,206 INFO L495 AbstractCegarLoop]: Abstraction has 1102 states and 1613 transitions. [2022-07-19 10:58:24,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 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 10:58:24,207 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 1613 transitions. [2022-07-19 10:58:24,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-19 10:58:24,208 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:58:24,208 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 10:58:24,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-19 10:58:24,209 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:58:24,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:58:24,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1550931695, now seen corresponding path program 1 times [2022-07-19 10:58:24,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:58:24,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771264666] [2022-07-19 10:58:24,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:58:24,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:58:24,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:24,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 10:58:24,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:24,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-19 10:58:24,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:24,315 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 10:58:24,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:58:24,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771264666] [2022-07-19 10:58:24,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771264666] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:58:24,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:58:24,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 10:58:24,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996894600] [2022-07-19 10:58:24,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:58:24,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 10:58:24,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:58:24,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 10:58:24,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:58:24,319 INFO L87 Difference]: Start difference. First operand 1102 states and 1613 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 3 states have internal predecessors, (42), 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 10:58:28,612 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:58:30,781 WARN L534 Checker$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 10:58:32,853 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:58:34,578 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:58:36,665 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:58:39,390 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:58:39,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:58:39,492 INFO L93 Difference]: Finished difference Result 1800 states and 2650 transitions. [2022-07-19 10:58:39,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 10:58:39,495 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 3 states have internal predecessors, (42), 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 49 [2022-07-19 10:58:39,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:58:39,501 INFO L225 Difference]: With dead ends: 1800 [2022-07-19 10:58:39,501 INFO L226 Difference]: Without dead ends: 1233 [2022-07-19 10:58:39,503 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 10:58:39,504 INFO L413 NwaCegarLoop]: 936 mSDtfsCounter, 586 mSDsluCounter, 1482 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 258 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 615 SdHoareTripleChecker+Valid, 2418 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:58:39,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [615 Valid, 2418 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 618 Invalid, 4 Unknown, 0 Unchecked, 15.1s Time] [2022-07-19 10:58:39,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2022-07-19 10:58:39,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 1061. [2022-07-19 10:58:39,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1061 states, 848 states have (on average 1.4162735849056605) internal successors, (1201), 855 states have internal predecessors, (1201), 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 10:58:39,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 1569 transitions. [2022-07-19 10:58:39,578 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 1569 transitions. Word has length 49 [2022-07-19 10:58:39,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:58:39,578 INFO L495 AbstractCegarLoop]: Abstraction has 1061 states and 1569 transitions. [2022-07-19 10:58:39,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 3 states have internal predecessors, (42), 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 10:58:39,579 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 1569 transitions. [2022-07-19 10:58:39,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-19 10:58:39,581 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:58:39,581 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 10:58:39,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-19 10:58:39,582 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:58:39,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:58:39,582 INFO L85 PathProgramCache]: Analyzing trace with hash -12023192, now seen corresponding path program 1 times [2022-07-19 10:58:39,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:58:39,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226188990] [2022-07-19 10:58:39,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:58:39,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:58:39,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:39,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-19 10:58:39,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:39,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-19 10:58:39,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:39,679 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 10:58:39,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:58:39,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226188990] [2022-07-19 10:58:39,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226188990] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:58:39,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:58:39,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 10:58:39,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794445576] [2022-07-19 10:58:39,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:58:39,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 10:58:39,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:58:39,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 10:58:39,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:58:39,682 INFO L87 Difference]: Start difference. First operand 1061 states and 1569 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 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 10:58:45,217 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:58:47,243 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:58:49,658 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:58:51,448 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:58:52,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:58:52,416 INFO L93 Difference]: Finished difference Result 1173 states and 1740 transitions. [2022-07-19 10:58:52,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 10:58:52,419 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 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 49 [2022-07-19 10:58:52,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:58:52,425 INFO L225 Difference]: With dead ends: 1173 [2022-07-19 10:58:52,425 INFO L226 Difference]: Without dead ends: 1145 [2022-07-19 10:58:52,426 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 10:58:52,426 INFO L413 NwaCegarLoop]: 838 mSDtfsCounter, 290 mSDsluCounter, 1582 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 253 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 2420 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2022-07-19 10:58:52,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 2420 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 649 Invalid, 3 Unknown, 0 Unchecked, 12.7s Time] [2022-07-19 10:58:52,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2022-07-19 10:58:52,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 1062. [2022-07-19 10:58:52,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1062 states, 849 states have (on average 1.4157832744405183) internal successors, (1202), 856 states have internal predecessors, (1202), 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 10:58:52,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1062 states to 1062 states and 1570 transitions. [2022-07-19 10:58:52,482 INFO L78 Accepts]: Start accepts. Automaton has 1062 states and 1570 transitions. Word has length 49 [2022-07-19 10:58:52,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:58:52,482 INFO L495 AbstractCegarLoop]: Abstraction has 1062 states and 1570 transitions. [2022-07-19 10:58:52,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 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 10:58:52,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1062 states and 1570 transitions. [2022-07-19 10:58:52,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-19 10:58:52,484 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:58:52,484 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 10:58:52,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-19 10:58:52,485 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:58:52,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:58:52,485 INFO L85 PathProgramCache]: Analyzing trace with hash 410678634, now seen corresponding path program 1 times [2022-07-19 10:58:52,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:58:52,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617455119] [2022-07-19 10:58:52,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:58:52,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:58:52,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:52,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-19 10:58:52,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:52,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-19 10:58:52,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:58:52,582 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 10:58:52,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:58:52,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617455119] [2022-07-19 10:58:52,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617455119] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:58:52,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:58:52,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 10:58:52,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340774965] [2022-07-19 10:58:52,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:58:52,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 10:58:52,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:58:52,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 10:58:52,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:58:52,584 INFO L87 Difference]: Start difference. First operand 1062 states and 1570 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 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 10:58:57,465 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:59:01,784 WARN L534 Checker$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 10:59:03,856 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:59:05,149 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:59:05,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:59:05,234 INFO L93 Difference]: Finished difference Result 1144 states and 1703 transitions. [2022-07-19 10:59:05,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 10:59:05,235 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 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 49 [2022-07-19 10:59:05,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:59:05,240 INFO L225 Difference]: With dead ends: 1144 [2022-07-19 10:59:05,241 INFO L226 Difference]: Without dead ends: 1137 [2022-07-19 10:59:05,242 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 10:59:05,243 INFO L413 NwaCegarLoop]: 836 mSDtfsCounter, 272 mSDsluCounter, 1578 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 241 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 2414 SdHoareTripleChecker+Invalid, 911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.5s IncrementalHoareTripleChecker+Time [2022-07-19 10:59:05,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 2414 Invalid, 911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 668 Invalid, 2 Unknown, 0 Unchecked, 12.5s Time] [2022-07-19 10:59:05,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2022-07-19 10:59:05,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 1074. [2022-07-19 10:59:05,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 861 states have (on average 1.4123112659698025) internal successors, (1216), 868 states have internal predecessors, (1216), 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 10:59:05,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 1584 transitions. [2022-07-19 10:59:05,302 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 1584 transitions. Word has length 49 [2022-07-19 10:59:05,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:59:05,302 INFO L495 AbstractCegarLoop]: Abstraction has 1074 states and 1584 transitions. [2022-07-19 10:59:05,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 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 10:59:05,303 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 1584 transitions. [2022-07-19 10:59:05,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-19 10:59:05,304 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:59:05,305 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 10:59:05,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-19 10:59:05,305 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:59:05,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:59:05,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1987447871, now seen corresponding path program 1 times [2022-07-19 10:59:05,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:59:05,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061848980] [2022-07-19 10:59:05,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:59:05,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:59:05,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:05,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-19 10:59:05,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:05,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-19 10:59:05,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:05,403 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 10:59:05,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:59:05,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061848980] [2022-07-19 10:59:05,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061848980] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:59:05,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:59:05,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 10:59:05,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205047125] [2022-07-19 10:59:05,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:59:05,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 10:59:05,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:59:05,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 10:59:05,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:59:05,406 INFO L87 Difference]: Start difference. First operand 1074 states and 1584 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 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 10:59:09,174 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:59:11,358 WARN L534 Checker$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 10:59:13,380 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:59:15,796 WARN L534 Checker$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 10:59:17,915 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:59:19,975 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:59:20,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:59:20,056 INFO L93 Difference]: Finished difference Result 1212 states and 1785 transitions. [2022-07-19 10:59:20,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 10:59:20,058 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 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 50 [2022-07-19 10:59:20,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:59:20,063 INFO L225 Difference]: With dead ends: 1212 [2022-07-19 10:59:20,063 INFO L226 Difference]: Without dead ends: 1138 [2022-07-19 10:59:20,064 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 10:59:20,065 INFO L413 NwaCegarLoop]: 836 mSDtfsCounter, 935 mSDsluCounter, 1205 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 287 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 998 SdHoareTripleChecker+Valid, 2041 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.5s IncrementalHoareTripleChecker+Time [2022-07-19 10:59:20,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [998 Valid, 2041 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 570 Invalid, 6 Unknown, 0 Unchecked, 14.5s Time] [2022-07-19 10:59:20,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2022-07-19 10:59:20,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 1063. [2022-07-19 10:59:20,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1063 states, 854 states have (on average 1.4133489461358313) internal successors, (1207), 861 states have internal predecessors, (1207), 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 10:59:20,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 1571 transitions. [2022-07-19 10:59:20,124 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 1571 transitions. Word has length 50 [2022-07-19 10:59:20,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:59:20,124 INFO L495 AbstractCegarLoop]: Abstraction has 1063 states and 1571 transitions. [2022-07-19 10:59:20,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 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 10:59:20,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 1571 transitions. [2022-07-19 10:59:20,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-19 10:59:20,127 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:59:20,127 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 10:59:20,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-19 10:59:20,128 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:59:20,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:59:20,128 INFO L85 PathProgramCache]: Analyzing trace with hash -145093477, now seen corresponding path program 1 times [2022-07-19 10:59:20,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:59:20,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915111689] [2022-07-19 10:59:20,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:59:20,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:59:20,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:20,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-19 10:59:20,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:20,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-19 10:59:20,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:20,272 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 10:59:20,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:59:20,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915111689] [2022-07-19 10:59:20,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915111689] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:59:20,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:59:20,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 10:59:20,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531421629] [2022-07-19 10:59:20,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:59:20,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 10:59:20,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:59:20,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 10:59:20,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 10:59:20,276 INFO L87 Difference]: Start difference. First operand 1063 states and 1571 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 5 states have internal predecessors, (45), 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 10:59:26,452 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:59:30,170 WARN L534 Checker$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 10:59:32,284 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:59:34,311 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:59:34,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:59:34,413 INFO L93 Difference]: Finished difference Result 1133 states and 1686 transitions. [2022-07-19 10:59:34,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 10:59:34,415 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 5 states have internal predecessors, (45), 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 50 [2022-07-19 10:59:34,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:59:34,419 INFO L225 Difference]: With dead ends: 1133 [2022-07-19 10:59:34,419 INFO L226 Difference]: Without dead ends: 1128 [2022-07-19 10:59:34,419 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 10:59:34,420 INFO L413 NwaCegarLoop]: 830 mSDtfsCounter, 1117 mSDsluCounter, 2056 mSDsCounter, 0 mSdLazyCounter, 1060 mSolverCounterSat, 297 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1207 SdHoareTripleChecker+Valid, 2886 SdHoareTripleChecker+Invalid, 1361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 1060 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:59:34,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1207 Valid, 2886 Invalid, 1361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 1060 Invalid, 4 Unknown, 0 Unchecked, 14.0s Time] [2022-07-19 10:59:34,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2022-07-19 10:59:34,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 1063. [2022-07-19 10:59:34,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1063 states, 854 states have (on average 1.4121779859484778) internal successors, (1206), 861 states have internal predecessors, (1206), 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 10:59:34,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 1570 transitions. [2022-07-19 10:59:34,479 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 1570 transitions. Word has length 50 [2022-07-19 10:59:34,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:59:34,479 INFO L495 AbstractCegarLoop]: Abstraction has 1063 states and 1570 transitions. [2022-07-19 10:59:34,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 5 states have internal predecessors, (45), 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 10:59:34,480 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 1570 transitions. [2022-07-19 10:59:34,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-19 10:59:34,482 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:59:34,482 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, 1] [2022-07-19 10:59:34,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-19 10:59:34,482 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:59:34,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:59:34,483 INFO L85 PathProgramCache]: Analyzing trace with hash -478429300, now seen corresponding path program 1 times [2022-07-19 10:59:34,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:59:34,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183356829] [2022-07-19 10:59:34,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:59:34,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:59:34,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:34,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-19 10:59:34,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:34,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-19 10:59:34,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:34,589 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 10:59:34,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:59:34,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183356829] [2022-07-19 10:59:34,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183356829] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:59:34,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:59:34,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 10:59:34,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774965983] [2022-07-19 10:59:34,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:59:34,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 10:59:34,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:59:34,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 10:59:34,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 10:59:34,592 INFO L87 Difference]: Start difference. First operand 1063 states and 1570 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 10:59:39,031 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:59:41,230 WARN L534 Checker$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 10:59:42,708 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:59:45,298 WARN L534 Checker$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 10:59:46,963 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:59:47,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:59:47,050 INFO L93 Difference]: Finished difference Result 2189 states and 3253 transitions. [2022-07-19 10:59:47,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 10:59:47,053 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 51 [2022-07-19 10:59:47,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:59:47,057 INFO L225 Difference]: With dead ends: 2189 [2022-07-19 10:59:47,058 INFO L226 Difference]: Without dead ends: 1130 [2022-07-19 10:59:47,060 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 10:59:47,061 INFO L413 NwaCegarLoop]: 833 mSDtfsCounter, 245 mSDsluCounter, 1626 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 238 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 2459 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.4s IncrementalHoareTripleChecker+Time [2022-07-19 10:59:47,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 2459 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 640 Invalid, 3 Unknown, 0 Unchecked, 12.4s Time] [2022-07-19 10:59:47,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1130 states. [2022-07-19 10:59:47,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1130 to 1066. [2022-07-19 10:59:47,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1066 states, 857 states have (on average 1.41073512252042) internal successors, (1209), 864 states have internal predecessors, (1209), 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 10:59:47,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1573 transitions. [2022-07-19 10:59:47,128 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1573 transitions. Word has length 51 [2022-07-19 10:59:47,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:59:47,128 INFO L495 AbstractCegarLoop]: Abstraction has 1066 states and 1573 transitions. [2022-07-19 10:59:47,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 10:59:47,128 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1573 transitions. [2022-07-19 10:59:47,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-19 10:59:47,135 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:59:47,135 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:59:47,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-19 10:59:47,135 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:59:47,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:59:47,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1720167098, now seen corresponding path program 1 times [2022-07-19 10:59:47,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:59:47,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122398753] [2022-07-19 10:59:47,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:59:47,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:59:47,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:47,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-19 10:59:47,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:47,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-19 10:59:47,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:47,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 10:59:47,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:59:47,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122398753] [2022-07-19 10:59:47,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122398753] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:59:47,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103741961] [2022-07-19 10:59:47,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:59:47,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:59:47,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:59:47,319 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:59:47,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 10:59:47,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:59:47,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-19 10:59:47,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:59:47,784 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:59:47,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:59:47,819 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 10:59:47,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103741961] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:59:47,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:59:47,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-07-19 10:59:47,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310249311] [2022-07-19 10:59:47,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:59:47,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 10:59:47,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:59:47,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 10:59:47,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-19 10:59:47,822 INFO L87 Difference]: Start difference. First operand 1066 states and 1573 transitions. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 7 states have internal predecessors, (80), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-19 10:59:52,909 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 10:59:54,812 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 10:59:56,930 WARN L534 Checker$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 10:59:58,147 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:00:00,166 WARN L534 Checker$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 11:00:02,537 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:00:04,649 WARN L534 Checker$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 11:00:05,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:00:05,547 INFO L93 Difference]: Finished difference Result 2204 states and 3272 transitions. [2022-07-19 11:00:05,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 11:00:05,550 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 7 states have internal predecessors, (80), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 57 [2022-07-19 11:00:05,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:00:05,556 INFO L225 Difference]: With dead ends: 2204 [2022-07-19 11:00:05,556 INFO L226 Difference]: Without dead ends: 1143 [2022-07-19 11:00:05,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-07-19 11:00:05,561 INFO L413 NwaCegarLoop]: 831 mSDtfsCounter, 271 mSDsluCounter, 3042 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 262 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 3873 SdHoareTripleChecker+Invalid, 1259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.6s IncrementalHoareTripleChecker+Time [2022-07-19 11:00:05,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 3873 Invalid, 1259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 992 Invalid, 5 Unknown, 0 Unchecked, 17.6s Time] [2022-07-19 11:00:05,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2022-07-19 11:00:05,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 1076. [2022-07-19 11:00:05,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1076 states, 867 states have (on average 1.405997693194925) internal successors, (1219), 874 states have internal predecessors, (1219), 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 11:00:05,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1076 states to 1076 states and 1583 transitions. [2022-07-19 11:00:05,641 INFO L78 Accepts]: Start accepts. Automaton has 1076 states and 1583 transitions. Word has length 57 [2022-07-19 11:00:05,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:00:05,641 INFO L495 AbstractCegarLoop]: Abstraction has 1076 states and 1583 transitions. [2022-07-19 11:00:05,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 7 states have internal predecessors, (80), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-19 11:00:05,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1076 states and 1583 transitions. [2022-07-19 11:00:05,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-19 11:00:05,643 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:00:05,644 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:00:05,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 11:00:05,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-19 11:00:05,860 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:00:05,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:00:05,860 INFO L85 PathProgramCache]: Analyzing trace with hash 788337404, now seen corresponding path program 2 times [2022-07-19 11:00:05,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:00:05,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106508659] [2022-07-19 11:00:05,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:00:05,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:00:05,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:05,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-19 11:00:05,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:06,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-19 11:00:06,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:06,011 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-19 11:00:06,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:00:06,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106508659] [2022-07-19 11:00:06,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106508659] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 11:00:06,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668358761] [2022-07-19 11:00:06,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 11:00:06,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:00:06,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:00:06,014 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 11:00:06,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 11:00:06,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-19 11:00:06,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 11:00:06,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-19 11:00:06,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 11:00:06,421 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-19 11:00:06,422 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 11:00:06,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668358761] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:00:06,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 11:00:06,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2022-07-19 11:00:06,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728721486] [2022-07-19 11:00:06,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:00:06,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 11:00:06,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:00:06,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 11:00:06,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-19 11:00:06,424 INFO L87 Difference]: Start difference. First operand 1076 states and 1583 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 11:00:06,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:00:06,506 INFO L93 Difference]: Finished difference Result 1874 states and 2813 transitions. [2022-07-19 11:00:06,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 11:00:06,506 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 67 [2022-07-19 11:00:06,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:00:06,512 INFO L225 Difference]: With dead ends: 1874 [2022-07-19 11:00:06,512 INFO L226 Difference]: Without dead ends: 1085 [2022-07-19 11:00:06,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-19 11:00:06,515 INFO L413 NwaCegarLoop]: 859 mSDtfsCounter, 2 mSDsluCounter, 1703 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2562 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 11:00:06,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 2562 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 11:00:06,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1085 states. [2022-07-19 11:00:06,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1085 to 1085. [2022-07-19 11:00:06,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1085 states, 874 states have (on average 1.4050343249427917) internal successors, (1228), 883 states have internal predecessors, (1228), 154 states have call successors, (154), 49 states have call predecessors, (154), 56 states have return successors, (212), 152 states have call predecessors, (212), 148 states have call successors, (212) [2022-07-19 11:00:06,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1085 states to 1085 states and 1594 transitions. [2022-07-19 11:00:06,574 INFO L78 Accepts]: Start accepts. Automaton has 1085 states and 1594 transitions. Word has length 67 [2022-07-19 11:00:06,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:00:06,575 INFO L495 AbstractCegarLoop]: Abstraction has 1085 states and 1594 transitions. [2022-07-19 11:00:06,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 11:00:06,575 INFO L276 IsEmpty]: Start isEmpty. Operand 1085 states and 1594 transitions. [2022-07-19 11:00:06,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-19 11:00:06,578 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:00:06,578 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:00:06,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 11:00:06,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-19 11:00:06,791 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:00:06,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:00:06,791 INFO L85 PathProgramCache]: Analyzing trace with hash -123842170, now seen corresponding path program 1 times [2022-07-19 11:00:06,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:00:06,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994876777] [2022-07-19 11:00:06,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:00:06,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:00:06,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:06,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-19 11:00:06,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:06,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 11:00:06,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:06,971 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-19 11:00:06,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:00:06,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994876777] [2022-07-19 11:00:06,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994876777] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:00:06,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:00:06,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-19 11:00:06,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899067417] [2022-07-19 11:00:06,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:00:06,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 11:00:06,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:00:06,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 11:00:06,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-07-19 11:00:06,975 INFO L87 Difference]: Start difference. First operand 1085 states and 1594 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 7 states have internal predecessors, (52), 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 11:00:14,058 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:00:16,229 WARN L534 Checker$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 11:00:17,918 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:00:20,356 WARN L534 Checker$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 11:00:22,515 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 11:00:22,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:00:22,801 INFO L93 Difference]: Finished difference Result 1122 states and 1644 transitions. [2022-07-19 11:00:22,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 11:00:22,803 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 7 states have internal predecessors, (52), 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 67 [2022-07-19 11:00:22,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:00:22,811 INFO L225 Difference]: With dead ends: 1122 [2022-07-19 11:00:22,812 INFO L226 Difference]: Without dead ends: 1107 [2022-07-19 11:00:22,813 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 11:00:22,813 INFO L413 NwaCegarLoop]: 843 mSDtfsCounter, 90 mSDsluCounter, 5401 mSDsCounter, 0 mSdLazyCounter, 1471 mSolverCounterSat, 105 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 6244 SdHoareTripleChecker+Invalid, 1580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1471 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.7s IncrementalHoareTripleChecker+Time [2022-07-19 11:00:22,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 6244 Invalid, 1580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1471 Invalid, 4 Unknown, 0 Unchecked, 15.7s Time] [2022-07-19 11:00:22,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2022-07-19 11:00:22,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 1083. [2022-07-19 11:00:22,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1083 states, 873 states have (on average 1.404352806414662) internal successors, (1226), 882 states have internal predecessors, (1226), 153 states have call successors, (153), 49 states have call predecessors, (153), 56 states have return successors, (211), 151 states have call predecessors, (211), 147 states have call successors, (211) [2022-07-19 11:00:22,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1083 states to 1083 states and 1590 transitions. [2022-07-19 11:00:22,873 INFO L78 Accepts]: Start accepts. Automaton has 1083 states and 1590 transitions. Word has length 67 [2022-07-19 11:00:22,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:00:22,874 INFO L495 AbstractCegarLoop]: Abstraction has 1083 states and 1590 transitions. [2022-07-19 11:00:22,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 7 states have internal predecessors, (52), 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 11:00:22,874 INFO L276 IsEmpty]: Start isEmpty. Operand 1083 states and 1590 transitions. [2022-07-19 11:00:22,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-19 11:00:22,877 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:00:22,877 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:00:22,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-19 11:00:22,877 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:00:22,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:00:22,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1285874888, now seen corresponding path program 1 times [2022-07-19 11:00:22,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:00:22,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897217026] [2022-07-19 11:00:22,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:00:22,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:00:22,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:22,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-19 11:00:23,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:23,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 11:00:23,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:23,021 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-19 11:00:23,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:00:23,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897217026] [2022-07-19 11:00:23,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897217026] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 11:00:23,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091057166] [2022-07-19 11:00:23,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:00:23,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:00:23,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:00:23,028 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 11:00:23,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 11:00:23,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:23,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 768 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-19 11:00:23,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 11:00:23,623 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-19 11:00:23,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 11:00:23,680 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-19 11:00:23,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091057166] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 11:00:23,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 11:00:23,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2022-07-19 11:00:23,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307441820] [2022-07-19 11:00:23,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 11:00:23,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 11:00:23,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:00:23,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 11:00:23,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-07-19 11:00:23,683 INFO L87 Difference]: Start difference. First operand 1083 states and 1590 transitions. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 9 states have internal predecessors, (72), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-19 11:00:26,192 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:00:29,957 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:00:32,132 WARN L534 Checker$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 11:00:34,164 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:00:36,931 WARN L534 Checker$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 11:00:39,073 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:00:41,098 WARN L534 Checker$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 11:00:41,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:00:41,204 INFO L93 Difference]: Finished difference Result 2223 states and 3269 transitions. [2022-07-19 11:00:41,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 11:00:41,206 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 9 states have internal predecessors, (72), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 68 [2022-07-19 11:00:41,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:00:41,211 INFO L225 Difference]: With dead ends: 2223 [2022-07-19 11:00:41,212 INFO L226 Difference]: Without dead ends: 1147 [2022-07-19 11:00:41,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-07-19 11:00:41,215 INFO L413 NwaCegarLoop]: 828 mSDtfsCounter, 277 mSDsluCounter, 3732 mSDsCounter, 0 mSdLazyCounter, 1187 mSolverCounterSat, 266 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 4560 SdHoareTripleChecker+Invalid, 1459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 1187 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.4s IncrementalHoareTripleChecker+Time [2022-07-19 11:00:41,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 4560 Invalid, 1459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 1187 Invalid, 6 Unknown, 0 Unchecked, 17.4s Time] [2022-07-19 11:00:41,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2022-07-19 11:00:41,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1097. [2022-07-19 11:00:41,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1097 states, 887 states have (on average 1.3979706877113867) internal successors, (1240), 896 states have internal predecessors, (1240), 153 states have call successors, (153), 49 states have call predecessors, (153), 56 states have return successors, (211), 151 states have call predecessors, (211), 147 states have call successors, (211) [2022-07-19 11:00:41,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1604 transitions. [2022-07-19 11:00:41,277 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1604 transitions. Word has length 68 [2022-07-19 11:00:41,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:00:41,277 INFO L495 AbstractCegarLoop]: Abstraction has 1097 states and 1604 transitions. [2022-07-19 11:00:41,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 9 states have internal predecessors, (72), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-19 11:00:41,278 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1604 transitions. [2022-07-19 11:00:41,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-19 11:00:41,280 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:00:41,281 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:00:41,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 11:00:41,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:00:41,508 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:00:41,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:00:41,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1011931974, now seen corresponding path program 2 times [2022-07-19 11:00:41,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:00:41,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115350133] [2022-07-19 11:00:41,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:00:41,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:00:41,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:41,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-19 11:00:41,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:41,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-07-19 11:00:41,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:41,784 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-19 11:00:41,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:00:41,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115350133] [2022-07-19 11:00:41,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115350133] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 11:00:41,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535289292] [2022-07-19 11:00:41,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 11:00:41,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:00:41,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:00:41,787 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 11:00:41,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 11:00:42,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 11:00:42,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 11:00:42,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 887 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-19 11:00:42,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 11:00:42,526 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-19 11:00:42,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 11:00:42,632 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-07-19 11:00:42,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535289292] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 11:00:42,632 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 11:00:42,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 15 [2022-07-19 11:00:42,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141684229] [2022-07-19 11:00:42,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 11:00:42,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-19 11:00:42,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:00:42,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-19 11:00:42,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2022-07-19 11:00:42,634 INFO L87 Difference]: Start difference. First operand 1097 states and 1604 transitions. Second operand has 15 states, 15 states have (on average 6.2) internal successors, (93), 13 states have internal predecessors, (93), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-19 11:00:47,775 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:00:49,050 WARN L534 Checker$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 11:00:51,069 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:00:54,618 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:00:55,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:00:55,935 INFO L93 Difference]: Finished difference Result 2263 states and 3319 transitions. [2022-07-19 11:00:55,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-19 11:00:55,938 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.2) internal successors, (93), 13 states have internal predecessors, (93), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 82 [2022-07-19 11:00:55,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:00:55,941 INFO L225 Difference]: With dead ends: 2263 [2022-07-19 11:00:55,942 INFO L226 Difference]: Without dead ends: 1181 [2022-07-19 11:00:55,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 164 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2022-07-19 11:00:55,945 INFO L413 NwaCegarLoop]: 829 mSDtfsCounter, 330 mSDsluCounter, 3734 mSDsCounter, 0 mSdLazyCounter, 1419 mSolverCounterSat, 333 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 4563 SdHoareTripleChecker+Invalid, 1752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 1419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.0s IncrementalHoareTripleChecker+Time [2022-07-19 11:00:55,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 4563 Invalid, 1752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 1419 Invalid, 0 Unknown, 0 Unchecked, 13.0s Time] [2022-07-19 11:00:55,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2022-07-19 11:00:56,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 1133. [2022-07-19 11:00:56,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1133 states, 923 states have (on average 1.3824485373781148) internal successors, (1276), 932 states have internal predecessors, (1276), 153 states have call successors, (153), 49 states have call predecessors, (153), 56 states have return successors, (211), 151 states have call predecessors, (211), 147 states have call successors, (211) [2022-07-19 11:00:56,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1133 states to 1133 states and 1640 transitions. [2022-07-19 11:00:56,008 INFO L78 Accepts]: Start accepts. Automaton has 1133 states and 1640 transitions. Word has length 82 [2022-07-19 11:00:56,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:00:56,009 INFO L495 AbstractCegarLoop]: Abstraction has 1133 states and 1640 transitions. [2022-07-19 11:00:56,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.2) internal successors, (93), 13 states have internal predecessors, (93), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-19 11:00:56,009 INFO L276 IsEmpty]: Start isEmpty. Operand 1133 states and 1640 transitions. [2022-07-19 11:00:56,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-07-19 11:00:56,012 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:00:56,012 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:00:56,042 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-19 11:00:56,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-19 11:00:56,231 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:00:56,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:00:56,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1191219690, now seen corresponding path program 3 times [2022-07-19 11:00:56,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:00:56,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715458181] [2022-07-19 11:00:56,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:00:56,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:00:56,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:56,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-07-19 11:00:56,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:56,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-07-19 11:00:56,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:00:56,574 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2022-07-19 11:00:56,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:00:56,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715458181] [2022-07-19 11:00:56,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715458181] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 11:00:56,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025314867] [2022-07-19 11:00:56,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 11:00:56,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:00:56,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:00:56,577 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 11:00:56,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 11:00:57,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-19 11:00:57,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 11:00:57,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-19 11:00:57,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 11:00:57,412 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2022-07-19 11:00:57,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 11:00:57,519 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2022-07-19 11:00:57,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025314867] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 11:00:57,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 11:00:57,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 5, 5] total 22 [2022-07-19 11:00:57,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980801745] [2022-07-19 11:00:57,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 11:00:57,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-19 11:00:57,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:00:57,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-19 11:00:57,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-07-19 11:00:57,521 INFO L87 Difference]: Start difference. First operand 1133 states and 1640 transitions. Second operand has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 20 states have internal predecessors, (108), 2 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 11:01:04,579 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:01:06,777 WARN L534 Checker$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 11:01:07,944 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:01:09,387 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:01:12,101 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:01:13,626 WARN L534 Checker$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 11:01:14,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:01:14,078 INFO L93 Difference]: Finished difference Result 2327 states and 3405 transitions. [2022-07-19 11:01:14,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-19 11:01:14,081 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 20 states have internal predecessors, (108), 2 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 118 [2022-07-19 11:01:14,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:01:14,089 INFO L225 Difference]: With dead ends: 2327 [2022-07-19 11:01:14,089 INFO L226 Difference]: Without dead ends: 1213 [2022-07-19 11:01:14,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=890, Unknown=0, NotChecked=0, Total=1056 [2022-07-19 11:01:14,093 INFO L413 NwaCegarLoop]: 819 mSDtfsCounter, 319 mSDsluCounter, 5150 mSDsCounter, 0 mSdLazyCounter, 2520 mSolverCounterSat, 339 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 5969 SdHoareTripleChecker+Invalid, 2861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 2520 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.2s IncrementalHoareTripleChecker+Time [2022-07-19 11:01:14,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [319 Valid, 5969 Invalid, 2861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 2520 Invalid, 2 Unknown, 0 Unchecked, 16.2s Time] [2022-07-19 11:01:14,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2022-07-19 11:01:14,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 1160. [2022-07-19 11:01:14,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1160 states, 948 states have (on average 1.3850210970464134) internal successors, (1313), 957 states have internal predecessors, (1313), 153 states have call successors, (153), 51 states have call predecessors, (153), 58 states have return successors, (213), 151 states have call predecessors, (213), 147 states have call successors, (213) [2022-07-19 11:01:14,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1679 transitions. [2022-07-19 11:01:14,185 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1679 transitions. Word has length 118 [2022-07-19 11:01:14,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:01:14,185 INFO L495 AbstractCegarLoop]: Abstraction has 1160 states and 1679 transitions. [2022-07-19 11:01:14,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 20 states have internal predecessors, (108), 2 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 11:01:14,186 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1679 transitions. [2022-07-19 11:01:14,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-07-19 11:01:14,189 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:01:14,190 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:01:14,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 11:01:14,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-19 11:01:14,404 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:01:14,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:01:14,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1808122274, now seen corresponding path program 1 times [2022-07-19 11:01:14,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:01:14,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310880088] [2022-07-19 11:01:14,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:01:14,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:01:14,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:01:14,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-07-19 11:01:14,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:01:14,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 11:01:14,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:01:14,640 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2022-07-19 11:01:14,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:01:14,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310880088] [2022-07-19 11:01:14,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310880088] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:01:14,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:01:14,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-19 11:01:14,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922032200] [2022-07-19 11:01:14,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:01:14,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 11:01:14,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:01:14,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 11:01:14,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-07-19 11:01:14,643 INFO L87 Difference]: Start difference. First operand 1160 states and 1679 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 7 states have internal predecessors, (54), 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 11:01:17,542 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:01:22,939 WARN L534 Checker$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 11:01:24,415 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:01:27,340 WARN L534 Checker$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 11:01:29,444 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 11:01:30,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:01:30,217 INFO L93 Difference]: Finished difference Result 1200 states and 1732 transitions. [2022-07-19 11:01:30,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 11:01:30,220 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 7 states have internal predecessors, (54), 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 125 [2022-07-19 11:01:30,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:01:30,223 INFO L225 Difference]: With dead ends: 1200 [2022-07-19 11:01:30,223 INFO L226 Difference]: Without dead ends: 1185 [2022-07-19 11:01:30,223 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 11:01:30,224 INFO L413 NwaCegarLoop]: 834 mSDtfsCounter, 90 mSDsluCounter, 5354 mSDsCounter, 0 mSdLazyCounter, 1460 mSolverCounterSat, 104 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 6188 SdHoareTripleChecker+Invalid, 1567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1460 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.5s IncrementalHoareTripleChecker+Time [2022-07-19 11:01:30,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 6188 Invalid, 1567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1460 Invalid, 3 Unknown, 0 Unchecked, 15.5s Time] [2022-07-19 11:01:30,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2022-07-19 11:01:30,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 1157. [2022-07-19 11:01:30,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 946 states have (on average 1.3847780126849893) internal successors, (1310), 955 states have internal predecessors, (1310), 152 states have call successors, (152), 51 states have call predecessors, (152), 58 states have return successors, (212), 150 states have call predecessors, (212), 146 states have call successors, (212) [2022-07-19 11:01:30,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 1674 transitions. [2022-07-19 11:01:30,297 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 1674 transitions. Word has length 125 [2022-07-19 11:01:30,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:01:30,297 INFO L495 AbstractCegarLoop]: Abstraction has 1157 states and 1674 transitions. [2022-07-19 11:01:30,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 7 states have internal predecessors, (54), 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 11:01:30,297 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 1674 transitions. [2022-07-19 11:01:30,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-07-19 11:01:30,300 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:01:30,300 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:01:30,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-19 11:01:30,301 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:01:30,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:01:30,301 INFO L85 PathProgramCache]: Analyzing trace with hash 266529286, now seen corresponding path program 1 times [2022-07-19 11:01:30,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:01:30,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417297425] [2022-07-19 11:01:30,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:01:30,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:01:30,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:01:30,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-07-19 11:01:30,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:01:30,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 11:01:30,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:01:30,552 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2022-07-19 11:01:30,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:01:30,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417297425] [2022-07-19 11:01:30,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417297425] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:01:30,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:01:30,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-19 11:01:30,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898109923] [2022-07-19 11:01:30,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:01:30,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 11:01:30,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:01:30,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 11:01:30,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-07-19 11:01:30,555 INFO L87 Difference]: Start difference. First operand 1157 states and 1674 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 8 states have internal predecessors, (55), 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 11:01:37,596 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:01:39,787 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:01:41,401 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:01:43,309 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:01:45,892 WARN L534 Checker$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 11:01:47,774 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 11:01:49,798 WARN L534 Checker$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 11:01:49,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:01:49,882 INFO L93 Difference]: Finished difference Result 1199 states and 1729 transitions. [2022-07-19 11:01:49,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 11:01:49,884 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 8 states have internal predecessors, (55), 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 126 [2022-07-19 11:01:49,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:01:49,886 INFO L225 Difference]: With dead ends: 1199 [2022-07-19 11:01:49,887 INFO L226 Difference]: Without dead ends: 1182 [2022-07-19 11:01:49,887 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 11:01:49,888 INFO L413 NwaCegarLoop]: 836 mSDtfsCounter, 101 mSDsluCounter, 6073 mSDsCounter, 0 mSdLazyCounter, 1616 mSolverCounterSat, 103 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 6909 SdHoareTripleChecker+Invalid, 1722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1616 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.2s IncrementalHoareTripleChecker+Time [2022-07-19 11:01:49,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 6909 Invalid, 1722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1616 Invalid, 3 Unknown, 0 Unchecked, 19.2s Time] [2022-07-19 11:01:49,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1182 states. [2022-07-19 11:01:49,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1182 to 1154. [2022-07-19 11:01:49,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1154 states, 944 states have (on average 1.3845338983050848) internal successors, (1307), 953 states have internal predecessors, (1307), 151 states have call successors, (151), 51 states have call predecessors, (151), 58 states have return successors, (211), 149 states have call predecessors, (211), 145 states have call successors, (211) [2022-07-19 11:01:49,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1154 states to 1154 states and 1669 transitions. [2022-07-19 11:01:49,950 INFO L78 Accepts]: Start accepts. Automaton has 1154 states and 1669 transitions. Word has length 126 [2022-07-19 11:01:49,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:01:49,951 INFO L495 AbstractCegarLoop]: Abstraction has 1154 states and 1669 transitions. [2022-07-19 11:01:49,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 8 states have internal predecessors, (55), 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 11:01:49,951 INFO L276 IsEmpty]: Start isEmpty. Operand 1154 states and 1669 transitions. [2022-07-19 11:01:49,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-07-19 11:01:49,953 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:01:49,954 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:01:49,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-19 11:01:49,954 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:01:49,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:01:49,954 INFO L85 PathProgramCache]: Analyzing trace with hash -434812860, now seen corresponding path program 4 times [2022-07-19 11:01:49,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:01:49,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621491472] [2022-07-19 11:01:49,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:01:49,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:01:50,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:01:50,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-07-19 11:01:50,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:01:50,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-07-19 11:01:50,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:01:50,326 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2022-07-19 11:01:50,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:01:50,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621491472] [2022-07-19 11:01:50,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621491472] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 11:01:50,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832131715] [2022-07-19 11:01:50,327 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 11:01:50,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:01:50,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:01:50,329 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 11:01:50,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 11:01:50,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 11:01:50,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 11:01:50,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 1289 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-19 11:01:50,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 11:01:51,102 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2022-07-19 11:01:51,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 11:01:51,318 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2022-07-19 11:01:51,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832131715] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 11:01:51,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 11:01:51,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 8] total 24 [2022-07-19 11:01:51,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465737284] [2022-07-19 11:01:51,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 11:01:51,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-19 11:01:51,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:01:51,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-19 11:01:51,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2022-07-19 11:01:51,320 INFO L87 Difference]: Start difference. First operand 1154 states and 1669 transitions. Second operand has 24 states, 24 states have (on average 4.791666666666667) internal successors, (115), 22 states have internal predecessors, (115), 2 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5)