./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 e19ca921 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-dev-e19ca92 [2021-12-22 08:35:25,770 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 08:35:25,774 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 08:35:25,793 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 08:35:25,793 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 08:35:25,794 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 08:35:25,795 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 08:35:25,796 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 08:35:25,798 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 08:35:25,798 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 08:35:25,799 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 08:35:25,800 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 08:35:25,800 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 08:35:25,801 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 08:35:25,801 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 08:35:25,802 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 08:35:25,803 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 08:35:25,803 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 08:35:25,804 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 08:35:25,805 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 08:35:25,806 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 08:35:25,820 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 08:35:25,821 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 08:35:25,821 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 08:35:25,823 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 08:35:25,823 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 08:35:25,824 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 08:35:25,824 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 08:35:25,825 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 08:35:25,825 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 08:35:25,825 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 08:35:25,826 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 08:35:25,826 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 08:35:25,827 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 08:35:25,828 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 08:35:25,828 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 08:35:25,828 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 08:35:25,828 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 08:35:25,829 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 08:35:25,829 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 08:35:25,830 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 08:35:25,830 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 08:35:25,844 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 08:35:25,844 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 08:35:25,844 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 08:35:25,844 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 08:35:25,845 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 08:35:25,845 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 08:35:25,846 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 08:35:25,846 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 08:35:25,846 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 08:35:25,846 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 08:35:25,846 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 08:35:25,846 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 08:35:25,847 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 08:35:25,847 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 08:35:25,847 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 08:35:25,847 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 08:35:25,847 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 08:35:25,847 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 08:35:25,847 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 08:35:25,848 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 08:35:25,848 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 08:35:25,848 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 08:35:25,848 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 08:35:25,848 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 08:35:25,848 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 08:35:25,849 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 08:35:25,849 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 08:35:25,849 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 08:35:25,849 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 08:35:25,849 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 08:35:25,849 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 08:35:25,849 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 08:35:25,850 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 08:35:25,850 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 08:35:25,850 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ad0884018313fc350052496ea1071e31a8b2c3997d36767afc87946a21697816 [2021-12-22 08:35:26,033 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 08:35:26,059 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 08:35:26,061 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 08:35:26,062 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 08:35:26,064 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 08:35:26,065 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ntdrivers/cdaudio.i.cil-1.c [2021-12-22 08:35:26,140 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b75666d0b/3fc3ded3c52e4f42b24c8fe143814393/FLAG164630ec9 [2021-12-22 08:35:26,693 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 08:35:26,694 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/cdaudio.i.cil-1.c [2021-12-22 08:35:26,734 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b75666d0b/3fc3ded3c52e4f42b24c8fe143814393/FLAG164630ec9 [2021-12-22 08:35:27,105 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b75666d0b/3fc3ded3c52e4f42b24c8fe143814393 [2021-12-22 08:35:27,107 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 08:35:27,108 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 08:35:27,109 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 08:35:27,109 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 08:35:27,111 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 08:35:27,111 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:35:27" (1/1) ... [2021-12-22 08:35:27,112 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5108983e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:27, skipping insertion in model container [2021-12-22 08:35:27,112 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:35:27" (1/1) ... [2021-12-22 08:35:27,117 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 08:35:27,173 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 08:35:27,555 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] [2021-12-22 08:35:28,009 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 08:35:28,030 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 08:35:28,087 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] [2021-12-22 08:35:28,325 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 08:35:28,345 INFO L208 MainTranslator]: Completed translation [2021-12-22 08:35:28,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:28 WrapperNode [2021-12-22 08:35:28,346 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 08:35:28,347 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 08:35:28,347 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 08:35:28,347 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 08:35:28,351 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:28" (1/1) ... [2021-12-22 08:35:28,426 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:28" (1/1) ... [2021-12-22 08:35:28,502 INFO L137 Inliner]: procedures = 120, calls = 2195, calls flagged for inlining = 23, calls inlined = 19, statements flattened = 2336 [2021-12-22 08:35:28,503 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 08:35:28,503 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 08:35:28,504 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 08:35:28,504 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 08:35:28,510 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:28" (1/1) ... [2021-12-22 08:35:28,510 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:28" (1/1) ... [2021-12-22 08:35:28,534 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:28" (1/1) ... [2021-12-22 08:35:28,535 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:28" (1/1) ... [2021-12-22 08:35:28,600 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:28" (1/1) ... [2021-12-22 08:35:28,608 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:28" (1/1) ... [2021-12-22 08:35:28,616 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:28" (1/1) ... [2021-12-22 08:35:28,626 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 08:35:28,627 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 08:35:28,627 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 08:35:28,627 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 08:35:28,627 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:28" (1/1) ... [2021-12-22 08:35:28,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 08:35:28,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:35:28,673 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) [2021-12-22 08:35:28,675 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 [2021-12-22 08:35:28,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-22 08:35:28,699 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-22 08:35:28,699 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-22 08:35:28,699 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 08:35:28,699 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2021-12-22 08:35:28,699 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2021-12-22 08:35:28,700 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-22 08:35:28,700 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-22 08:35:28,700 INFO L130 BoogieDeclarations]: Found specification of procedure MmLockPagableDataSection [2021-12-22 08:35:28,700 INFO L138 BoogieDeclarations]: Found implementation of procedure MmLockPagableDataSection [2021-12-22 08:35:28,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 08:35:28,702 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioIsPlayActive [2021-12-22 08:35:28,703 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioIsPlayActive [2021-12-22 08:35:28,703 INFO L130 BoogieDeclarations]: Found specification of procedure IoOpenDeviceRegistryKey [2021-12-22 08:35:28,703 INFO L138 BoogieDeclarations]: Found implementation of procedure IoOpenDeviceRegistryKey [2021-12-22 08:35:28,703 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2021-12-22 08:35:28,703 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2021-12-22 08:35:28,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-22 08:35:28,703 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-22 08:35:28,703 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_malloc [2021-12-22 08:35:28,703 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_malloc [2021-12-22 08:35:28,704 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2021-12-22 08:35:28,704 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2021-12-22 08:35:28,704 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 08:35:28,704 INFO L130 BoogieDeclarations]: Found specification of procedure ZwClose [2021-12-22 08:35:28,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ZwClose [2021-12-22 08:35:28,704 INFO L130 BoogieDeclarations]: Found specification of procedure SendSrbSynchronous [2021-12-22 08:35:28,705 INFO L138 BoogieDeclarations]: Found implementation of procedure SendSrbSynchronous [2021-12-22 08:35:28,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 08:35:28,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-22 08:35:28,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 08:35:28,705 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2021-12-22 08:35:28,705 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2021-12-22 08:35:28,705 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-12-22 08:35:28,706 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-22 08:35:28,706 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2021-12-22 08:35:28,706 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2021-12-22 08:35:28,706 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSignalCompletion [2021-12-22 08:35:28,706 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSignalCompletion [2021-12-22 08:35:28,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 08:35:28,706 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2021-12-22 08:35:28,706 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2021-12-22 08:35:28,707 INFO L130 BoogieDeclarations]: Found specification of procedure HPCdrCompletion [2021-12-22 08:35:28,707 INFO L138 BoogieDeclarations]: Found implementation of procedure HPCdrCompletion [2021-12-22 08:35:28,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 08:35:28,707 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSendToNextDriver [2021-12-22 08:35:28,707 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSendToNextDriver [2021-12-22 08:35:28,707 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-22 08:35:28,707 INFO L130 BoogieDeclarations]: Found specification of procedure ExAllocatePoolWithTag [2021-12-22 08:35:28,707 INFO L138 BoogieDeclarations]: Found implementation of procedure ExAllocatePoolWithTag [2021-12-22 08:35:28,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 08:35:28,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 08:35:28,708 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioForwardIrpSynchronous [2021-12-22 08:35:28,709 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioForwardIrpSynchronous [2021-12-22 08:35:29,002 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 08:35:29,003 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 08:35:29,128 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-22 08:35:29,138 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2021-12-22 08:35:29,139 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2021-12-22 08:35:29,493 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-22 08:35:29,514 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume !false; [2021-12-22 08:35:29,514 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume false; [2021-12-22 08:35:29,528 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-22 08:35:29,529 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-22 08:35:29,530 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-22 08:35:29,535 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-22 08:35:29,541 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-22 08:35:29,551 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-22 08:35:39,347 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##276: assume false; [2021-12-22 08:35:39,347 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##277: assume !false; [2021-12-22 08:35:39,347 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##504: assume !false; [2021-12-22 08:35:39,347 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##503: assume false; [2021-12-22 08:35:39,347 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L3709: CdAudioPnp_#res#1 := 0; [2021-12-22 08:35:39,347 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##172: assume !false; [2021-12-22 08:35:39,347 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##171: assume false; [2021-12-22 08:35:39,347 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##65: assume !false; [2021-12-22 08:35:39,347 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##64: assume false; [2021-12-22 08:35:39,347 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##43: assume !false; [2021-12-22 08:35:39,347 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##42: assume false; [2021-12-22 08:35:39,347 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##32: assume false; [2021-12-22 08:35:39,348 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##33: assume !false; [2021-12-22 08:35:39,372 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-22 08:35:39,375 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2021-12-22 08:35:39,375 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2021-12-22 08:35:39,386 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 08:35:39,400 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 08:35:39,400 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-12-22 08:35:39,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:35:39 BoogieIcfgContainer [2021-12-22 08:35:39,403 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 08:35:39,404 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 08:35:39,404 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 08:35:39,406 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 08:35:39,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:35:27" (1/3) ... [2021-12-22 08:35:39,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38edd1f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:35:39, skipping insertion in model container [2021-12-22 08:35:39,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:28" (2/3) ... [2021-12-22 08:35:39,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38edd1f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:35:39, skipping insertion in model container [2021-12-22 08:35:39,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:35:39" (3/3) ... [2021-12-22 08:35:39,409 INFO L111 eAbstractionObserver]: Analyzing ICFG cdaudio.i.cil-1.c [2021-12-22 08:35:39,413 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 08:35:39,413 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 08:35:39,455 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 08:35:39,466 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 08:35:39,467 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 08:35:39,494 INFO L276 IsEmpty]: Start isEmpty. Operand has 617 states, 483 states have (on average 1.5196687370600415) internal successors, (734), 502 states have internal predecessors, (734), 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) [2021-12-22 08:35:39,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-22 08:35:39,498 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:39,499 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:35:39,499 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:39,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:39,504 INFO L85 PathProgramCache]: Analyzing trace with hash 5486212, now seen corresponding path program 1 times [2021-12-22 08:35:39,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:39,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212175649] [2021-12-22 08:35:39,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:39,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:39,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:39,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:35:39,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:39,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212175649] [2021-12-22 08:35:39,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212175649] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:39,732 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:39,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:35:39,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68042827] [2021-12-22 08:35:39,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:39,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:35:39,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:39,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:35:39,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:35:39,755 INFO L87 Difference]: Start difference. First operand has 617 states, 483 states have (on average 1.5196687370600415) internal successors, (734), 502 states have internal predecessors, (734), 113 states have call successors, (113), 19 states have call predecessors, (113), 19 states have return successors, (113), 108 states have call predecessors, (113), 113 states have call successors, (113) Second operand has 3 states, 3 states have (on average 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) [2021-12-22 08:35:39,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:39,874 INFO L93 Difference]: Finished difference Result 1237 states and 1975 transitions. [2021-12-22 08:35:39,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:35:39,876 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 [2021-12-22 08:35:39,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:39,886 INFO L225 Difference]: With dead ends: 1237 [2021-12-22 08:35:39,886 INFO L226 Difference]: Without dead ends: 610 [2021-12-22 08:35:39,893 INFO L932 BasicCegarLoop]: 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 [2021-12-22 08:35:39,895 INFO L933 BasicCegarLoop]: 928 mSDtfsCounter, 20 mSDsluCounter, 867 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 1795 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 08:35:39,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 1795 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 08:35:39,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-12-22 08:35:39,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 610. [2021-12-22 08:35:39,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 478 states have (on average 1.4853556485355648) internal successors, (710), 495 states have internal predecessors, (710), 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) [2021-12-22 08:35:39,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 920 transitions. [2021-12-22 08:35:39,955 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 920 transitions. Word has length 19 [2021-12-22 08:35:39,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:39,956 INFO L470 AbstractCegarLoop]: Abstraction has 610 states and 920 transitions. [2021-12-22 08:35:39,956 INFO L471 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) [2021-12-22 08:35:39,956 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 920 transitions. [2021-12-22 08:35:39,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-22 08:35:39,957 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:39,957 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:35:39,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 08:35:39,957 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:39,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:39,958 INFO L85 PathProgramCache]: Analyzing trace with hash 405571933, now seen corresponding path program 1 times [2021-12-22 08:35:39,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:39,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132826921] [2021-12-22 08:35:39,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:39,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:39,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:40,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:35:40,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:40,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132826921] [2021-12-22 08:35:40,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132826921] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:40,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:40,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:35:40,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991409167] [2021-12-22 08:35:40,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:40,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:35:40,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:40,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:35:40,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:35:40,067 INFO L87 Difference]: Start difference. First operand 610 states and 920 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) [2021-12-22 08:35:40,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:40,183 INFO L93 Difference]: Finished difference Result 1123 states and 1681 transitions. [2021-12-22 08:35:40,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:35:40,183 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 [2021-12-22 08:35:40,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:40,189 INFO L225 Difference]: With dead ends: 1123 [2021-12-22 08:35:40,189 INFO L226 Difference]: Without dead ends: 882 [2021-12-22 08:35:40,191 INFO L932 BasicCegarLoop]: 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 [2021-12-22 08:35:40,191 INFO L933 BasicCegarLoop]: 1241 mSDtfsCounter, 834 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 834 SdHoareTripleChecker+Valid, 1655 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 [2021-12-22 08:35:40,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [834 Valid, 1655 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 08:35:40,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2021-12-22 08:35:40,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 863. [2021-12-22 08:35:40,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 688 states have (on average 1.4651162790697674) internal successors, (1008), 691 states have internal predecessors, (1008), 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) [2021-12-22 08:35:40,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1296 transitions. [2021-12-22 08:35:40,227 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1296 transitions. Word has length 21 [2021-12-22 08:35:40,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:40,228 INFO L470 AbstractCegarLoop]: Abstraction has 863 states and 1296 transitions. [2021-12-22 08:35:40,228 INFO L471 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) [2021-12-22 08:35:40,228 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1296 transitions. [2021-12-22 08:35:40,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-22 08:35:40,229 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:40,229 INFO L514 BasicCegarLoop]: 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] [2021-12-22 08:35:40,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 08:35:40,230 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:40,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:40,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1497789841, now seen corresponding path program 1 times [2021-12-22 08:35:40,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:40,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689796418] [2021-12-22 08:35:40,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:40,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:40,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:40,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:35:40,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:40,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689796418] [2021-12-22 08:35:40,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689796418] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:40,285 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:40,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:35:40,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119626545] [2021-12-22 08:35:40,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:40,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:35:40,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:40,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:35:40,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:35:40,287 INFO L87 Difference]: Start difference. First operand 863 states and 1296 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) [2021-12-22 08:35:40,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:40,399 INFO L93 Difference]: Finished difference Result 1823 states and 2803 transitions. [2021-12-22 08:35:40,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:35:40,400 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 [2021-12-22 08:35:40,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:40,409 INFO L225 Difference]: With dead ends: 1823 [2021-12-22 08:35:40,410 INFO L226 Difference]: Without dead ends: 1428 [2021-12-22 08:35:40,411 INFO L932 BasicCegarLoop]: 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 [2021-12-22 08:35:40,415 INFO L933 BasicCegarLoop]: 1422 mSDtfsCounter, 575 mSDsluCounter, 866 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 2288 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 [2021-12-22 08:35:40,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [575 Valid, 2288 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 08:35:40,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2021-12-22 08:35:40,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 1026. [2021-12-22 08:35:40,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1026 states, 809 states have (on average 1.4536464771322621) internal successors, (1176), 811 states have internal predecessors, (1176), 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) [2021-12-22 08:35:40,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1026 states to 1026 states and 1563 transitions. [2021-12-22 08:35:40,473 INFO L78 Accepts]: Start accepts. Automaton has 1026 states and 1563 transitions. Word has length 28 [2021-12-22 08:35:40,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:40,473 INFO L470 AbstractCegarLoop]: Abstraction has 1026 states and 1563 transitions. [2021-12-22 08:35:40,473 INFO L471 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) [2021-12-22 08:35:40,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1026 states and 1563 transitions. [2021-12-22 08:35:40,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-22 08:35:40,475 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:40,475 INFO L514 BasicCegarLoop]: 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] [2021-12-22 08:35:40,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 08:35:40,475 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:40,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:40,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1577683242, now seen corresponding path program 1 times [2021-12-22 08:35:40,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:40,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447445975] [2021-12-22 08:35:40,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:40,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:40,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:40,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:35:40,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:40,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447445975] [2021-12-22 08:35:40,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447445975] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:40,543 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:40,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:35:40,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791302657] [2021-12-22 08:35:40,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:40,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:35:40,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:40,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:35:40,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:35:40,545 INFO L87 Difference]: Start difference. First operand 1026 states and 1563 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) [2021-12-22 08:35:40,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:40,583 INFO L93 Difference]: Finished difference Result 1670 states and 2499 transitions. [2021-12-22 08:35:40,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:35:40,584 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 [2021-12-22 08:35:40,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:40,589 INFO L225 Difference]: With dead ends: 1670 [2021-12-22 08:35:40,589 INFO L226 Difference]: Without dead ends: 1538 [2021-12-22 08:35:40,590 INFO L932 BasicCegarLoop]: 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 [2021-12-22 08:35:40,591 INFO L933 BasicCegarLoop]: 1151 mSDtfsCounter, 837 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 837 SdHoareTripleChecker+Valid, 1549 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 [2021-12-22 08:35:40,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [837 Valid, 1549 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:35:40,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1538 states. [2021-12-22 08:35:40,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1538 to 1477. [2021-12-22 08:35:40,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1173 states have (on average 1.4578005115089514) internal successors, (1710), 1171 states have internal predecessors, (1710), 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) [2021-12-22 08:35:40,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 2235 transitions. [2021-12-22 08:35:40,627 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 2235 transitions. Word has length 28 [2021-12-22 08:35:40,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:40,627 INFO L470 AbstractCegarLoop]: Abstraction has 1477 states and 2235 transitions. [2021-12-22 08:35:40,628 INFO L471 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) [2021-12-22 08:35:40,628 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 2235 transitions. [2021-12-22 08:35:40,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-22 08:35:40,629 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:40,629 INFO L514 BasicCegarLoop]: 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] [2021-12-22 08:35:40,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 08:35:40,629 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:40,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:40,630 INFO L85 PathProgramCache]: Analyzing trace with hash 574098819, now seen corresponding path program 1 times [2021-12-22 08:35:40,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:40,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659004148] [2021-12-22 08:35:40,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:40,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:40,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:40,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:35:40,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:40,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659004148] [2021-12-22 08:35:40,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659004148] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:40,689 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:40,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 08:35:40,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260714252] [2021-12-22 08:35:40,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:40,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 08:35:40,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:40,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 08:35:40,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 08:35:40,690 INFO L87 Difference]: Start difference. First operand 1477 states and 2235 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) [2021-12-22 08:35:41,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:41,148 INFO L93 Difference]: Finished difference Result 2654 states and 4047 transitions. [2021-12-22 08:35:41,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 08:35:41,149 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 [2021-12-22 08:35:41,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:41,156 INFO L225 Difference]: With dead ends: 2654 [2021-12-22 08:35:41,156 INFO L226 Difference]: Without dead ends: 1775 [2021-12-22 08:35:41,159 INFO L932 BasicCegarLoop]: 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 [2021-12-22 08:35:41,160 INFO L933 BasicCegarLoop]: 1148 mSDtfsCounter, 1423 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1425 SdHoareTripleChecker+Valid, 1460 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 08:35:41,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1425 Valid, 1460 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 08:35:41,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1775 states. [2021-12-22 08:35:41,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1775 to 1465. [2021-12-22 08:35:41,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1465 states, 1163 states have (on average 1.4548581255374033) internal successors, (1692), 1161 states have internal predecessors, (1692), 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) [2021-12-22 08:35:41,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 2211 transitions. [2021-12-22 08:35:41,207 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 2211 transitions. Word has length 29 [2021-12-22 08:35:41,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:41,207 INFO L470 AbstractCegarLoop]: Abstraction has 1465 states and 2211 transitions. [2021-12-22 08:35:41,208 INFO L471 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) [2021-12-22 08:35:41,208 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 2211 transitions. [2021-12-22 08:35:41,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-22 08:35:41,209 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:41,209 INFO L514 BasicCegarLoop]: 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] [2021-12-22 08:35:41,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 08:35:41,209 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:41,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:41,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1666004885, now seen corresponding path program 1 times [2021-12-22 08:35:41,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:41,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772130665] [2021-12-22 08:35:41,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:41,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:41,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:41,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:35:41,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:41,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772130665] [2021-12-22 08:35:41,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772130665] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:41,260 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:41,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:35:41,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901617668] [2021-12-22 08:35:41,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:41,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:35:41,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:41,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:35:41,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:35:41,261 INFO L87 Difference]: Start difference. First operand 1465 states and 2211 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) [2021-12-22 08:35:41,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:41,325 INFO L93 Difference]: Finished difference Result 1468 states and 2213 transitions. [2021-12-22 08:35:41,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:35:41,325 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 [2021-12-22 08:35:41,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:41,331 INFO L225 Difference]: With dead ends: 1468 [2021-12-22 08:35:41,331 INFO L226 Difference]: Without dead ends: 1464 [2021-12-22 08:35:41,332 INFO L932 BasicCegarLoop]: 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 [2021-12-22 08:35:41,332 INFO L933 BasicCegarLoop]: 879 mSDtfsCounter, 34 mSDsluCounter, 822 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1701 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 [2021-12-22 08:35:41,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 1701 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:35:41,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2021-12-22 08:35:41,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1464. [2021-12-22 08:35:41,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1464 states, 1163 states have (on average 1.4531384350816854) internal successors, (1690), 1160 states have internal predecessors, (1690), 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) [2021-12-22 08:35:41,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1464 states to 1464 states and 2208 transitions. [2021-12-22 08:35:41,374 INFO L78 Accepts]: Start accepts. Automaton has 1464 states and 2208 transitions. Word has length 28 [2021-12-22 08:35:41,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:41,374 INFO L470 AbstractCegarLoop]: Abstraction has 1464 states and 2208 transitions. [2021-12-22 08:35:41,374 INFO L471 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) [2021-12-22 08:35:41,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1464 states and 2208 transitions. [2021-12-22 08:35:41,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-22 08:35:41,376 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:41,376 INFO L514 BasicCegarLoop]: 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] [2021-12-22 08:35:41,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 08:35:41,376 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:41,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:41,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1579997021, now seen corresponding path program 1 times [2021-12-22 08:35:41,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:41,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812254898] [2021-12-22 08:35:41,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:41,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:41,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:41,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 08:35:41,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:41,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:35:41,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:41,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812254898] [2021-12-22 08:35:41,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812254898] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:41,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:41,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 08:35:41,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257436444] [2021-12-22 08:35:41,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:41,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 08:35:41,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:41,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 08:35:41,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 08:35:41,456 INFO L87 Difference]: Start difference. First operand 1464 states and 2208 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) [2021-12-22 08:35:44,683 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 [] [2021-12-22 08:35:48,268 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 08:35:49,478 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 08:35:51,282 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 08:35:52,417 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 08:35:55,226 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 [] [2021-12-22 08:35:55,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:55,300 INFO L93 Difference]: Finished difference Result 2260 states and 3359 transitions. [2021-12-22 08:35:55,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 08:35:55,312 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 [2021-12-22 08:35:55,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:55,316 INFO L225 Difference]: With dead ends: 2260 [2021-12-22 08:35:55,317 INFO L226 Difference]: Without dead ends: 1239 [2021-12-22 08:35:55,319 INFO L932 BasicCegarLoop]: 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 [2021-12-22 08:35:55,320 INFO L933 BasicCegarLoop]: 949 mSDtfsCounter, 793 mSDsluCounter, 1591 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 287 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 796 SdHoareTripleChecker+Valid, 2540 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.7s IncrementalHoareTripleChecker+Time [2021-12-22 08:35:55,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [796 Valid, 2540 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 456 Invalid, 3 Unknown, 0 Unchecked, 13.7s Time] [2021-12-22 08:35:55,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2021-12-22 08:35:55,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 1097. [2021-12-22 08:35:55,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1097 states, 872 states have (on average 1.4311926605504588) internal successors, (1248), 871 states have internal predecessors, (1248), 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) [2021-12-22 08:35:55,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1626 transitions. [2021-12-22 08:35:55,354 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1626 transitions. Word has length 41 [2021-12-22 08:35:55,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:55,355 INFO L470 AbstractCegarLoop]: Abstraction has 1097 states and 1626 transitions. [2021-12-22 08:35:55,355 INFO L471 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) [2021-12-22 08:35:55,355 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1626 transitions. [2021-12-22 08:35:55,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-22 08:35:55,359 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:55,359 INFO L514 BasicCegarLoop]: 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] [2021-12-22 08:35:55,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 08:35:55,359 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:55,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:55,360 INFO L85 PathProgramCache]: Analyzing trace with hash -9397451, now seen corresponding path program 1 times [2021-12-22 08:35:55,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:55,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285770240] [2021-12-22 08:35:55,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:55,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:55,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:55,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:35:55,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:55,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285770240] [2021-12-22 08:35:55,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285770240] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:55,460 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:55,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 08:35:55,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986597168] [2021-12-22 08:35:55,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:55,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 08:35:55,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:55,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 08:35:55,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 08:35:55,461 INFO L87 Difference]: Start difference. First operand 1097 states and 1626 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) [2021-12-22 08:35:55,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:55,780 INFO L93 Difference]: Finished difference Result 1158 states and 1706 transitions. [2021-12-22 08:35:55,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 08:35:55,781 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 [2021-12-22 08:35:55,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:55,785 INFO L225 Difference]: With dead ends: 1158 [2021-12-22 08:35:55,785 INFO L226 Difference]: Without dead ends: 1114 [2021-12-22 08:35:55,786 INFO L932 BasicCegarLoop]: 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 [2021-12-22 08:35:55,786 INFO L933 BasicCegarLoop]: 875 mSDtfsCounter, 912 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 912 SdHoareTripleChecker+Valid, 1526 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 08:35:55,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [912 Valid, 1526 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 08:35:55,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-12-22 08:35:55,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 1097. [2021-12-22 08:35:55,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1097 states, 872 states have (on average 1.4288990825688073) internal successors, (1246), 871 states have internal predecessors, (1246), 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) [2021-12-22 08:35:55,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1624 transitions. [2021-12-22 08:35:55,817 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1624 transitions. Word has length 37 [2021-12-22 08:35:55,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:55,818 INFO L470 AbstractCegarLoop]: Abstraction has 1097 states and 1624 transitions. [2021-12-22 08:35:55,818 INFO L471 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) [2021-12-22 08:35:55,818 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1624 transitions. [2021-12-22 08:35:55,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-22 08:35:55,819 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:55,820 INFO L514 BasicCegarLoop]: 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] [2021-12-22 08:35:55,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 08:35:55,820 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:55,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:55,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1221971472, now seen corresponding path program 1 times [2021-12-22 08:35:55,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:55,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983897306] [2021-12-22 08:35:55,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:55,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:55,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:55,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:35:55,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:55,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983897306] [2021-12-22 08:35:55,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983897306] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:55,902 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:55,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 08:35:55,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946015230] [2021-12-22 08:35:55,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:55,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 08:35:55,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:55,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 08:35:55,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 08:35:55,905 INFO L87 Difference]: Start difference. First operand 1097 states and 1624 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) [2021-12-22 08:35:56,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:56,198 INFO L93 Difference]: Finished difference Result 1148 states and 1689 transitions. [2021-12-22 08:35:56,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 08:35:56,198 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 [2021-12-22 08:35:56,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:56,202 INFO L225 Difference]: With dead ends: 1148 [2021-12-22 08:35:56,202 INFO L226 Difference]: Without dead ends: 1076 [2021-12-22 08:35:56,202 INFO L932 BasicCegarLoop]: 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 [2021-12-22 08:35:56,203 INFO L933 BasicCegarLoop]: 874 mSDtfsCounter, 893 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 893 SdHoareTripleChecker+Valid, 1525 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 08:35:56,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [893 Valid, 1525 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 08:35:56,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2021-12-22 08:35:56,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 1074. [2021-12-22 08:35:56,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 851 states have (on average 1.434782608695652) internal successors, (1221), 857 states have internal predecessors, (1221), 163 states have call successors, (163), 55 states have call predecessors, (163), 59 states have return successors, (206), 161 states have call predecessors, (206), 155 states have call successors, (206) [2021-12-22 08:35:56,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 1590 transitions. [2021-12-22 08:35:56,231 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 1590 transitions. Word has length 39 [2021-12-22 08:35:56,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:56,231 INFO L470 AbstractCegarLoop]: Abstraction has 1074 states and 1590 transitions. [2021-12-22 08:35:56,231 INFO L471 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) [2021-12-22 08:35:56,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 1590 transitions. [2021-12-22 08:35:56,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-22 08:35:56,233 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:56,233 INFO L514 BasicCegarLoop]: 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] [2021-12-22 08:35:56,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 08:35:56,233 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:56,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:56,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1795960592, now seen corresponding path program 1 times [2021-12-22 08:35:56,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:56,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998716131] [2021-12-22 08:35:56,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:56,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:56,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:56,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:35:56,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:56,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998716131] [2021-12-22 08:35:56,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998716131] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:56,289 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:56,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 08:35:56,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585145233] [2021-12-22 08:35:56,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:56,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 08:35:56,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:56,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 08:35:56,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 08:35:56,290 INFO L87 Difference]: Start difference. First operand 1074 states and 1590 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) [2021-12-22 08:35:56,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:56,676 INFO L93 Difference]: Finished difference Result 1358 states and 2005 transitions. [2021-12-22 08:35:56,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 08:35:56,676 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 [2021-12-22 08:35:56,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:56,681 INFO L225 Difference]: With dead ends: 1358 [2021-12-22 08:35:56,681 INFO L226 Difference]: Without dead ends: 1349 [2021-12-22 08:35:56,682 INFO L932 BasicCegarLoop]: 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 [2021-12-22 08:35:56,682 INFO L933 BasicCegarLoop]: 1172 mSDtfsCounter, 1143 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1152 SdHoareTripleChecker+Valid, 1819 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 08:35:56,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1152 Valid, 1819 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 08:35:56,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1349 states. [2021-12-22 08:35:56,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1349 to 1090. [2021-12-22 08:35:56,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 866 states have (on average 1.430715935334873) internal successors, (1239), 872 states have internal predecessors, (1239), 163 states have call successors, (163), 55 states have call predecessors, (163), 60 states have return successors, (206), 162 states have call predecessors, (206), 155 states have call successors, (206) [2021-12-22 08:35:56,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 1608 transitions. [2021-12-22 08:35:56,714 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 1608 transitions. Word has length 39 [2021-12-22 08:35:56,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:56,714 INFO L470 AbstractCegarLoop]: Abstraction has 1090 states and 1608 transitions. [2021-12-22 08:35:56,714 INFO L471 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) [2021-12-22 08:35:56,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 1608 transitions. [2021-12-22 08:35:56,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-22 08:35:56,715 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:56,715 INFO L514 BasicCegarLoop]: 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] [2021-12-22 08:35:56,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 08:35:56,716 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:56,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:56,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1796237422, now seen corresponding path program 1 times [2021-12-22 08:35:56,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:56,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490377745] [2021-12-22 08:35:56,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:56,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:56,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:56,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:35:56,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:56,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490377745] [2021-12-22 08:35:56,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490377745] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:56,758 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:56,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:35:56,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086833378] [2021-12-22 08:35:56,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:56,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:35:56,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:56,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:35:56,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:35:56,759 INFO L87 Difference]: Start difference. First operand 1090 states and 1608 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) [2021-12-22 08:35:56,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:56,819 INFO L93 Difference]: Finished difference Result 1192 states and 1745 transitions. [2021-12-22 08:35:56,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:35:56,819 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 [2021-12-22 08:35:56,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:56,823 INFO L225 Difference]: With dead ends: 1192 [2021-12-22 08:35:56,823 INFO L226 Difference]: Without dead ends: 1164 [2021-12-22 08:35:56,823 INFO L932 BasicCegarLoop]: 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 [2021-12-22 08:35:56,824 INFO L933 BasicCegarLoop]: 881 mSDtfsCounter, 867 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 867 SdHoareTripleChecker+Valid, 938 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:35:56,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [867 Valid, 938 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:35:56,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2021-12-22 08:35:56,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 1141. [2021-12-22 08:35:56,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 913 states have (on average 1.429353778751369) internal successors, (1305), 919 states have internal predecessors, (1305), 164 states have call successors, (164), 56 states have call predecessors, (164), 63 states have return successors, (209), 165 states have call predecessors, (209), 156 states have call successors, (209) [2021-12-22 08:35:56,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 1678 transitions. [2021-12-22 08:35:56,858 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 1678 transitions. Word has length 39 [2021-12-22 08:35:56,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:56,858 INFO L470 AbstractCegarLoop]: Abstraction has 1141 states and 1678 transitions. [2021-12-22 08:35:56,859 INFO L471 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) [2021-12-22 08:35:56,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 1678 transitions. [2021-12-22 08:35:56,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-22 08:35:56,860 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:56,860 INFO L514 BasicCegarLoop]: 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] [2021-12-22 08:35:56,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 08:35:56,860 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:56,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:56,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1810582331, now seen corresponding path program 1 times [2021-12-22 08:35:56,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:56,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181883775] [2021-12-22 08:35:56,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:56,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:56,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:56,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:35:56,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:56,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181883775] [2021-12-22 08:35:56,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181883775] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:56,902 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:56,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:35:56,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265084497] [2021-12-22 08:35:56,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:56,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:35:56,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:56,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:35:56,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:35:56,903 INFO L87 Difference]: Start difference. First operand 1141 states and 1678 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) [2021-12-22 08:35:56,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:56,974 INFO L93 Difference]: Finished difference Result 1402 states and 2062 transitions. [2021-12-22 08:35:56,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:35:56,975 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 [2021-12-22 08:35:56,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:56,979 INFO L225 Difference]: With dead ends: 1402 [2021-12-22 08:35:56,979 INFO L226 Difference]: Without dead ends: 1389 [2021-12-22 08:35:56,980 INFO L932 BasicCegarLoop]: 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 [2021-12-22 08:35:56,980 INFO L933 BasicCegarLoop]: 1188 mSDtfsCounter, 353 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 2000 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:35:56,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 2000 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:35:56,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1389 states. [2021-12-22 08:35:57,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1389 to 1138. [2021-12-22 08:35:57,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1138 states, 910 states have (on average 1.4263736263736264) internal successors, (1298), 916 states have internal predecessors, (1298), 164 states have call successors, (164), 56 states have call predecessors, (164), 63 states have return successors, (209), 165 states have call predecessors, (209), 156 states have call successors, (209) [2021-12-22 08:35:57,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 1671 transitions. [2021-12-22 08:35:57,016 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 1671 transitions. Word has length 39 [2021-12-22 08:35:57,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:57,016 INFO L470 AbstractCegarLoop]: Abstraction has 1138 states and 1671 transitions. [2021-12-22 08:35:57,016 INFO L471 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) [2021-12-22 08:35:57,017 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 1671 transitions. [2021-12-22 08:35:57,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-22 08:35:57,017 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:57,017 INFO L514 BasicCegarLoop]: 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] [2021-12-22 08:35:57,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 08:35:57,018 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:57,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:57,018 INFO L85 PathProgramCache]: Analyzing trace with hash -935716902, now seen corresponding path program 1 times [2021-12-22 08:35:57,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:57,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198514057] [2021-12-22 08:35:57,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:57,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:57,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:57,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-22 08:35:57,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:57,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:35:57,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:57,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198514057] [2021-12-22 08:35:57,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198514057] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:57,086 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:57,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 08:35:57,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786039888] [2021-12-22 08:35:57,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:57,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 08:35:57,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:57,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 08:35:57,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 08:35:57,087 INFO L87 Difference]: Start difference. First operand 1138 states and 1671 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) [2021-12-22 08:36:01,455 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 [] [2021-12-22 08:36:03,254 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 08:36:05,870 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 08:36:07,893 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 08:36:09,568 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 08:36:10,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:36:10,485 INFO L93 Difference]: Finished difference Result 1761 states and 2599 transitions. [2021-12-22 08:36:10,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 08:36:10,488 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 [2021-12-22 08:36:10,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:36:10,491 INFO L225 Difference]: With dead ends: 1761 [2021-12-22 08:36:10,492 INFO L226 Difference]: Without dead ends: 1129 [2021-12-22 08:36:10,493 INFO L932 BasicCegarLoop]: 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 [2021-12-22 08:36:10,493 INFO L933 BasicCegarLoop]: 851 mSDtfsCounter, 910 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 135 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 970 SdHoareTripleChecker+Valid, 1246 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.3s IncrementalHoareTripleChecker+Time [2021-12-22 08:36:10,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [970 Valid, 1246 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 323 Invalid, 3 Unknown, 0 Unchecked, 13.3s Time] [2021-12-22 08:36:10,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2021-12-22 08:36:10,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 1070. [2021-12-22 08:36:10,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1070 states, 849 states have (on average 1.4204946996466432) internal successors, (1206), 853 states have internal predecessors, (1206), 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) [2021-12-22 08:36:10,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 1572 transitions. [2021-12-22 08:36:10,527 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 1572 transitions. Word has length 42 [2021-12-22 08:36:10,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:36:10,528 INFO L470 AbstractCegarLoop]: Abstraction has 1070 states and 1572 transitions. [2021-12-22 08:36:10,528 INFO L471 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) [2021-12-22 08:36:10,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 1572 transitions. [2021-12-22 08:36:10,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-22 08:36:10,529 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:36:10,529 INFO L514 BasicCegarLoop]: 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] [2021-12-22 08:36:10,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 08:36:10,529 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:36:10,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:36:10,530 INFO L85 PathProgramCache]: Analyzing trace with hash 159691478, now seen corresponding path program 1 times [2021-12-22 08:36:10,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:36:10,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645307595] [2021-12-22 08:36:10,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:36:10,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:36:10,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:36:10,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:36:10,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:36:10,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645307595] [2021-12-22 08:36:10,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645307595] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:36:10,587 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:36:10,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 08:36:10,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431690704] [2021-12-22 08:36:10,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:36:10,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 08:36:10,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:36:10,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 08:36:10,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 08:36:10,589 INFO L87 Difference]: Start difference. First operand 1070 states and 1572 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) [2021-12-22 08:36:10,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:36:10,684 INFO L93 Difference]: Finished difference Result 1082 states and 1584 transitions. [2021-12-22 08:36:10,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 08:36:10,685 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 [2021-12-22 08:36:10,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:36:10,689 INFO L225 Difference]: With dead ends: 1082 [2021-12-22 08:36:10,690 INFO L226 Difference]: Without dead ends: 1054 [2021-12-22 08:36:10,690 INFO L932 BasicCegarLoop]: 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 [2021-12-22 08:36:10,691 INFO L933 BasicCegarLoop]: 868 mSDtfsCounter, 34 mSDsluCounter, 3425 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 4293 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:36:10,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 4293 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:36:10,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2021-12-22 08:36:10,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 1054. [2021-12-22 08:36:10,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1054 states, 833 states have (on average 1.424969987995198) internal successors, (1187), 837 states have internal predecessors, (1187), 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) [2021-12-22 08:36:10,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 1553 transitions. [2021-12-22 08:36:10,726 INFO L78 Accepts]: Start accepts. Automaton has 1054 states and 1553 transitions. Word has length 40 [2021-12-22 08:36:10,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:36:10,726 INFO L470 AbstractCegarLoop]: Abstraction has 1054 states and 1553 transitions. [2021-12-22 08:36:10,726 INFO L471 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) [2021-12-22 08:36:10,727 INFO L276 IsEmpty]: Start isEmpty. Operand 1054 states and 1553 transitions. [2021-12-22 08:36:10,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-22 08:36:10,728 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:36:10,728 INFO L514 BasicCegarLoop]: 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] [2021-12-22 08:36:10,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 08:36:10,728 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:36:10,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:36:10,729 INFO L85 PathProgramCache]: Analyzing trace with hash 209462248, now seen corresponding path program 1 times [2021-12-22 08:36:10,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:36:10,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161635187] [2021-12-22 08:36:10,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:36:10,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:36:10,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:36:10,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 08:36:10,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:36:10,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-22 08:36:10,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:36:10,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:36:10,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:36:10,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161635187] [2021-12-22 08:36:10,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161635187] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:36:10,818 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:36:10,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 08:36:10,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487279925] [2021-12-22 08:36:10,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:36:10,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 08:36:10,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:36:10,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 08:36:10,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 08:36:10,820 INFO L87 Difference]: Start difference. First operand 1054 states and 1553 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) [2021-12-22 08:36:15,515 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 08:36:17,467 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 08:36:20,112 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 08:36:21,659 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 08:36:23,200 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 08:36:25,221 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 08:36:25,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:36:25,277 INFO L93 Difference]: Finished difference Result 1720 states and 2550 transitions. [2021-12-22 08:36:25,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 08:36:25,279 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 [2021-12-22 08:36:25,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:36:25,284 INFO L225 Difference]: With dead ends: 1720 [2021-12-22 08:36:25,284 INFO L226 Difference]: Without dead ends: 1185 [2021-12-22 08:36:25,285 INFO L932 BasicCegarLoop]: 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 [2021-12-22 08:36:25,285 INFO L933 BasicCegarLoop]: 904 mSDtfsCounter, 594 mSDsluCounter, 1481 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 264 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 2385 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.3s IncrementalHoareTripleChecker+Time [2021-12-22 08:36:25,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [623 Valid, 2385 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 571 Invalid, 3 Unknown, 0 Unchecked, 14.3s Time] [2021-12-22 08:36:25,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2021-12-22 08:36:25,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 1021. [2021-12-22 08:36:25,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 808 states have (on average 1.4245049504950495) internal successors, (1151), 815 states have internal predecessors, (1151), 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) [2021-12-22 08:36:25,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 1519 transitions. [2021-12-22 08:36:25,322 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 1519 transitions. Word has length 49 [2021-12-22 08:36:25,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:36:25,322 INFO L470 AbstractCegarLoop]: Abstraction has 1021 states and 1519 transitions. [2021-12-22 08:36:25,322 INFO L471 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) [2021-12-22 08:36:25,322 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 1519 transitions. [2021-12-22 08:36:25,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-22 08:36:25,324 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:36:25,324 INFO L514 BasicCegarLoop]: 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] [2021-12-22 08:36:25,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-22 08:36:25,324 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:36:25,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:36:25,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1748370751, now seen corresponding path program 1 times [2021-12-22 08:36:25,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:36:25,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047176001] [2021-12-22 08:36:25,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:36:25,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:36:25,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:36:25,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 08:36:25,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:36:25,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-22 08:36:25,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:36:25,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:36:25,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:36:25,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047176001] [2021-12-22 08:36:25,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047176001] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:36:25,390 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:36:25,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 08:36:25,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238505227] [2021-12-22 08:36:25,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:36:25,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 08:36:25,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:36:25,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 08:36:25,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 08:36:25,392 INFO L87 Difference]: Start difference. First operand 1021 states and 1519 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) [2021-12-22 08:36:29,496 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 08:36:31,554 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 08:36:34,963 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 08:36:37,001 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 08:36:39,093 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 []