./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-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 64bit --witnessprinter.graph.data.programhash 275849fbaca37e76eea790df33e2de383489441cc01df773179ecf6c76094336 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 23:26:40,686 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 23:26:40,687 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 23:26:40,746 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 23:26:40,747 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 23:26:40,747 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 23:26:40,748 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 23:26:40,750 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 23:26:40,751 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 23:26:40,751 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 23:26:40,752 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 23:26:40,753 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 23:26:40,753 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 23:26:40,754 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 23:26:40,754 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 23:26:40,758 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 23:26:40,759 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 23:26:40,763 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 23:26:40,768 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 23:26:40,773 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 23:26:40,775 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 23:26:40,776 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 23:26:40,778 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 23:26:40,780 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 23:26:40,780 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 23:26:40,783 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 23:26:40,783 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 23:26:40,784 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 23:26:40,784 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 23:26:40,785 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 23:26:40,787 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 23:26:40,789 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 23:26:40,790 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 23:26:40,790 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 23:26:40,791 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 23:26:40,792 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 23:26:40,792 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 23:26:40,793 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 23:26:40,793 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 23:26:40,793 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 23:26:40,794 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 23:26:40,795 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 23:26:40,796 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-07-13 23:26:40,815 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 23:26:40,816 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 23:26:40,816 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 23:26:40,816 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 23:26:40,816 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 23:26:40,817 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 23:26:40,817 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 23:26:40,817 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 23:26:40,817 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 23:26:40,818 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 23:26:40,818 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 23:26:40,818 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 23:26:40,818 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 23:26:40,819 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 23:26:40,819 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 23:26:40,819 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 23:26:40,819 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 23:26:40,819 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 23:26:40,819 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 23:26:40,819 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 23:26:40,820 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 23:26:40,821 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 23:26:40,821 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 23:26:40,821 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 23:26:40,821 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 23:26:40,821 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 23:26:40,821 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 23:26:40,821 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 23:26:40,822 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 23:26:40,822 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 23:26:40,822 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 275849fbaca37e76eea790df33e2de383489441cc01df773179ecf6c76094336 [2022-07-13 23:26:41,014 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 23:26:41,037 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 23:26:41,039 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 23:26:41,040 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 23:26:41,040 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 23:26:41,041 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.i [2022-07-13 23:26:41,088 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/649983803/8f5643b68e754f2a818a2cba5f91ce95/FLAGc1233c722 [2022-07-13 23:26:41,665 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 23:26:41,665 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.i [2022-07-13 23:26:41,683 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/649983803/8f5643b68e754f2a818a2cba5f91ce95/FLAGc1233c722 [2022-07-13 23:26:42,120 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/649983803/8f5643b68e754f2a818a2cba5f91ce95 [2022-07-13 23:26:42,122 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 23:26:42,124 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 23:26:42,125 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 23:26:42,125 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 23:26:42,127 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 23:26:42,128 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 11:26:42" (1/1) ... [2022-07-13 23:26:42,128 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31d4f79f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:26:42, skipping insertion in model container [2022-07-13 23:26:42,128 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 11:26:42" (1/1) ... [2022-07-13 23:26:42,133 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 23:26:42,201 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 23:26:42,986 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/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.i[158757,158770] [2022-07-13 23:26:43,003 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 23:26:43,031 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 23:26:43,234 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/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.i[158757,158770] [2022-07-13 23:26:43,247 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 23:26:43,298 INFO L208 MainTranslator]: Completed translation [2022-07-13 23:26:43,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:26:43 WrapperNode [2022-07-13 23:26:43,301 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 23:26:43,302 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 23:26:43,302 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 23:26:43,302 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 23:26:43,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:26:43" (1/1) ... [2022-07-13 23:26:43,366 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:26:43" (1/1) ... [2022-07-13 23:26:43,458 INFO L137 Inliner]: procedures = 191, calls = 1268, calls flagged for inlining = 83, calls inlined = 83, statements flattened = 3442 [2022-07-13 23:26:43,458 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 23:26:43,459 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 23:26:43,459 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 23:26:43,459 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 23:26:43,465 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:26:43" (1/1) ... [2022-07-13 23:26:43,465 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:26:43" (1/1) ... [2022-07-13 23:26:43,493 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:26:43" (1/1) ... [2022-07-13 23:26:43,507 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:26:43" (1/1) ... [2022-07-13 23:26:43,641 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:26:43" (1/1) ... [2022-07-13 23:26:43,673 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:26:43" (1/1) ... [2022-07-13 23:26:43,695 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:26:43" (1/1) ... [2022-07-13 23:26:43,715 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 23:26:43,717 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 23:26:43,717 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 23:26:43,717 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 23:26:43,718 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:26:43" (1/1) ... [2022-07-13 23:26:43,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 23:26:43,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 23:26:43,753 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-13 23:26:43,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-13 23:26:43,784 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_free [2022-07-13 23:26:43,784 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_free [2022-07-13 23:26:43,784 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~int [2022-07-13 23:26:43,784 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~int [2022-07-13 23:26:43,784 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2022-07-13 23:26:43,784 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2022-07-13 23:26:43,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-07-13 23:26:43,785 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-07-13 23:26:43,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-07-13 23:26:43,785 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 23:26:43,785 INFO L130 BoogieDeclarations]: Found specification of procedure get_gadget_data [2022-07-13 23:26:43,785 INFO L138 BoogieDeclarations]: Found implementation of procedure get_gadget_data [2022-07-13 23:26:43,785 INFO L130 BoogieDeclarations]: Found specification of procedure printer_poll [2022-07-13 23:26:43,785 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_poll [2022-07-13 23:26:43,785 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-07-13 23:26:43,786 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-07-13 23:26:43,786 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_free_request [2022-07-13 23:26:43,786 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_free_request [2022-07-13 23:26:43,786 INFO L130 BoogieDeclarations]: Found specification of procedure printer_reset_interface [2022-07-13 23:26:43,786 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_reset_interface [2022-07-13 23:26:43,786 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2022-07-13 23:26:43,786 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2022-07-13 23:26:43,786 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-07-13 23:26:43,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-07-13 23:26:43,787 INFO L130 BoogieDeclarations]: Found specification of procedure printer_soft_reset [2022-07-13 23:26:43,787 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_soft_reset [2022-07-13 23:26:43,787 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_nonpositive_int [2022-07-13 23:26:43,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_nonpositive_int [2022-07-13 23:26:43,787 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_class [2022-07-13 23:26:43,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_class [2022-07-13 23:26:43,787 INFO L130 BoogieDeclarations]: Found specification of procedure list_del_init [2022-07-13 23:26:43,787 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del_init [2022-07-13 23:26:43,787 INFO L130 BoogieDeclarations]: Found specification of procedure set_printer_interface [2022-07-13 23:26:43,788 INFO L138 BoogieDeclarations]: Found implementation of procedure set_printer_interface [2022-07-13 23:26:43,788 INFO L130 BoogieDeclarations]: Found specification of procedure setup_rx_reqs [2022-07-13 23:26:43,788 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_rx_reqs [2022-07-13 23:26:43,788 INFO L130 BoogieDeclarations]: Found specification of procedure class_destroy [2022-07-13 23:26:43,788 INFO L138 BoogieDeclarations]: Found implementation of procedure class_destroy [2022-07-13 23:26:43,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 23:26:43,788 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-07-13 23:26:43,789 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-07-13 23:26:43,789 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-07-13 23:26:43,789 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-07-13 23:26:43,789 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_queue [2022-07-13 23:26:43,789 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_queue [2022-07-13 23:26:43,789 INFO L130 BoogieDeclarations]: Found specification of procedure set_interface [2022-07-13 23:26:43,789 INFO L138 BoogieDeclarations]: Found implementation of procedure set_interface [2022-07-13 23:26:43,789 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup_complete [2022-07-13 23:26:43,790 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup_complete [2022-07-13 23:26:43,790 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value [2022-07-13 23:26:43,790 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value [2022-07-13 23:26:43,790 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-07-13 23:26:43,790 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-07-13 23:26:43,790 INFO L130 BoogieDeclarations]: Found specification of procedure usb_gadget_vbus_draw [2022-07-13 23:26:43,790 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_gadget_vbus_draw [2022-07-13 23:26:43,791 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-13 23:26:43,791 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2022-07-13 23:26:43,792 INFO L130 BoogieDeclarations]: Found specification of procedure printer_unbind [2022-07-13 23:26:43,792 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_unbind [2022-07-13 23:26:43,792 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_alloc_notrace [2022-07-13 23:26:43,792 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-07-13 23:26:43,792 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-07-13 23:26:43,792 INFO L130 BoogieDeclarations]: Found specification of procedure printer_close [2022-07-13 23:26:43,792 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_close [2022-07-13 23:26:43,793 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2022-07-13 23:26:43,793 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2022-07-13 23:26:43,793 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 23:26:43,793 INFO L130 BoogieDeclarations]: Found specification of procedure poll_wait [2022-07-13 23:26:43,793 INFO L138 BoogieDeclarations]: Found implementation of procedure poll_wait [2022-07-13 23:26:43,793 INFO L130 BoogieDeclarations]: Found specification of procedure printer_fsync [2022-07-13 23:26:43,793 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_fsync [2022-07-13 23:26:43,793 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 23:26:43,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-13 23:26:43,794 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2022-07-13 23:26:43,794 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2022-07-13 23:26:43,794 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2022-07-13 23:26:43,794 INFO L130 BoogieDeclarations]: Found specification of procedure init_utsname [2022-07-13 23:26:43,794 INFO L138 BoogieDeclarations]: Found implementation of procedure init_utsname [2022-07-13 23:26:43,795 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_enable [2022-07-13 23:26:43,795 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_enable [2022-07-13 23:26:43,795 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-13 23:26:43,795 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_sched_notrace [2022-07-13 23:26:43,795 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_sched_notrace [2022-07-13 23:26:43,795 INFO L130 BoogieDeclarations]: Found specification of procedure printer_open [2022-07-13 23:26:43,795 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_open [2022-07-13 23:26:43,795 INFO L130 BoogieDeclarations]: Found specification of procedure printer_bind [2022-07-13 23:26:43,796 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_bind [2022-07-13 23:26:43,796 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2022-07-13 23:26:43,796 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2022-07-13 23:26:43,796 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2022-07-13 23:26:43,796 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2022-07-13 23:26:43,796 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2022-07-13 23:26:43,797 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2022-07-13 23:26:43,797 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2022-07-13 23:26:43,797 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2022-07-13 23:26:43,797 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-07-13 23:26:43,797 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-07-13 23:26:43,797 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2022-07-13 23:26:43,798 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2022-07-13 23:26:43,798 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_autoconfig [2022-07-13 23:26:43,798 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_autoconfig [2022-07-13 23:26:43,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 23:26:43,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-13 23:26:43,798 INFO L130 BoogieDeclarations]: Found specification of procedure trace_kmalloc [2022-07-13 23:26:43,799 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_kmalloc [2022-07-13 23:26:43,799 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2022-07-13 23:26:43,799 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2022-07-13 23:26:43,799 INFO L130 BoogieDeclarations]: Found specification of procedure prepare_to_wait [2022-07-13 23:26:43,799 INFO L138 BoogieDeclarations]: Found implementation of procedure prepare_to_wait [2022-07-13 23:26:43,799 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2022-07-13 23:26:43,799 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2022-07-13 23:26:43,799 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup [2022-07-13 23:26:43,800 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup [2022-07-13 23:26:43,800 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2022-07-13 23:26:43,800 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2022-07-13 23:26:43,800 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_chrdev_region [2022-07-13 23:26:43,800 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_chrdev_region [2022-07-13 23:26:43,801 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-07-13 23:26:43,801 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-07-13 23:26:43,803 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2022-07-13 23:26:43,803 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2022-07-13 23:26:43,803 INFO L130 BoogieDeclarations]: Found specification of procedure set_gadget_data [2022-07-13 23:26:43,803 INFO L138 BoogieDeclarations]: Found implementation of procedure set_gadget_data [2022-07-13 23:26:43,804 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_alloc [2022-07-13 23:26:43,804 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_alloc [2022-07-13 23:26:43,804 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-07-13 23:26:43,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-07-13 23:26:43,805 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2022-07-13 23:26:43,808 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2022-07-13 23:26:43,809 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_disable [2022-07-13 23:26:43,809 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_disable [2022-07-13 23:26:43,809 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2022-07-13 23:26:43,809 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2022-07-13 23:26:43,809 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_chrdev_region [2022-07-13 23:26:43,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_chrdev_region [2022-07-13 23:26:43,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 23:26:43,809 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_handler_precall [2022-07-13 23:26:43,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_handler_precall [2022-07-13 23:26:43,809 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2022-07-13 23:26:43,810 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2022-07-13 23:26:43,810 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-07-13 23:26:43,810 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2022-07-13 23:26:43,810 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2022-07-13 23:26:43,810 INFO L130 BoogieDeclarations]: Found specification of procedure finish_wait [2022-07-13 23:26:43,810 INFO L138 BoogieDeclarations]: Found implementation of procedure finish_wait [2022-07-13 23:26:43,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 23:26:43,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 23:26:43,810 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2022-07-13 23:26:43,810 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2022-07-13 23:26:44,210 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 23:26:44,212 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 23:26:57,786 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 23:26:57,804 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 23:26:57,804 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-13 23:26:57,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 11:26:57 BoogieIcfgContainer [2022-07-13 23:26:57,806 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 23:26:57,809 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 23:26:57,809 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 23:26:57,811 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 23:26:57,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 11:26:42" (1/3) ... [2022-07-13 23:26:57,812 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d7e5fff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 11:26:57, skipping insertion in model container [2022-07-13 23:26:57,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:26:43" (2/3) ... [2022-07-13 23:26:57,812 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d7e5fff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 11:26:57, skipping insertion in model container [2022-07-13 23:26:57,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 11:26:57" (3/3) ... [2022-07-13 23:26:57,813 INFO L111 eAbstractionObserver]: Analyzing ICFG m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-2.i [2022-07-13 23:26:57,821 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 23:26:57,822 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 23:26:57,888 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 23:26:57,895 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@11a60dfd, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4d34c819 [2022-07-13 23:26:57,895 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 23:26:57,902 INFO L276 IsEmpty]: Start isEmpty. Operand has 1278 states, 894 states have (on average 1.407158836689038) internal successors, (1258), 934 states have internal predecessors, (1258), 317 states have call successors, (317), 65 states have call predecessors, (317), 65 states have return successors, (317), 314 states have call predecessors, (317), 317 states have call successors, (317) [2022-07-13 23:26:57,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-13 23:26:57,906 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 23:26:57,907 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 23:26:57,907 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 23:26:57,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 23:26:57,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1087819150, now seen corresponding path program 1 times [2022-07-13 23:26:57,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 23:26:57,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220012015] [2022-07-13 23:26:57,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 23:26:57,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 23:26:58,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:26:58,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 23:26:58,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:26:58,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 23:26:58,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:26:58,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 23:26:58,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 23:26:58,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220012015] [2022-07-13 23:26:58,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220012015] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 23:26:58,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 23:26:58,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 23:26:58,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057827963] [2022-07-13 23:26:58,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 23:26:58,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 23:26:58,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 23:26:58,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 23:26:58,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 23:26:58,505 INFO L87 Difference]: Start difference. First operand has 1278 states, 894 states have (on average 1.407158836689038) internal successors, (1258), 934 states have internal predecessors, (1258), 317 states have call successors, (317), 65 states have call predecessors, (317), 65 states have return successors, (317), 314 states have call predecessors, (317), 317 states have call successors, (317) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 23:27:00,578 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 23:27:04,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 23:27:04,650 INFO L93 Difference]: Finished difference Result 4165 states and 6365 transitions. [2022-07-13 23:27:04,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 23:27:04,652 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-07-13 23:27:04,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 23:27:04,691 INFO L225 Difference]: With dead ends: 4165 [2022-07-13 23:27:04,691 INFO L226 Difference]: Without dead ends: 2887 [2022-07-13 23:27:04,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 23:27:04,705 INFO L413 NwaCegarLoop]: 2053 mSDtfsCounter, 3067 mSDsluCounter, 2185 mSDsCounter, 0 mSdLazyCounter, 1392 mSolverCounterSat, 923 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3362 SdHoareTripleChecker+Valid, 4238 SdHoareTripleChecker+Invalid, 2316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 923 IncrementalHoareTripleChecker+Valid, 1392 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-07-13 23:27:04,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3362 Valid, 4238 Invalid, 2316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [923 Valid, 1392 Invalid, 1 Unknown, 0 Unchecked, 5.8s Time] [2022-07-13 23:27:04,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2887 states. [2022-07-13 23:27:04,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2887 to 2330. [2022-07-13 23:27:04,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2330 states, 1616 states have (on average 1.3545792079207921) internal successors, (2189), 1674 states have internal predecessors, (2189), 593 states have call successors, (593), 122 states have call predecessors, (593), 120 states have return successors, (584), 577 states have call predecessors, (584), 584 states have call successors, (584) [2022-07-13 23:27:04,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2330 states to 2330 states and 3366 transitions. [2022-07-13 23:27:04,871 INFO L78 Accepts]: Start accepts. Automaton has 2330 states and 3366 transitions. Word has length 17 [2022-07-13 23:27:04,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 23:27:04,871 INFO L495 AbstractCegarLoop]: Abstraction has 2330 states and 3366 transitions. [2022-07-13 23:27:04,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 23:27:04,871 INFO L276 IsEmpty]: Start isEmpty. Operand 2330 states and 3366 transitions. [2022-07-13 23:27:04,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-13 23:27:04,872 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 23:27:04,873 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 23:27:04,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 23:27:04,873 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 23:27:04,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 23:27:04,874 INFO L85 PathProgramCache]: Analyzing trace with hash 636307650, now seen corresponding path program 1 times [2022-07-13 23:27:04,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 23:27:04,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776094561] [2022-07-13 23:27:04,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 23:27:04,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 23:27:04,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:27:05,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 23:27:05,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:27:05,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 23:27:05,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:27:05,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 23:27:05,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 23:27:05,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776094561] [2022-07-13 23:27:05,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776094561] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 23:27:05,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 23:27:05,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 23:27:05,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837650119] [2022-07-13 23:27:05,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 23:27:05,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 23:27:05,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 23:27:05,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 23:27:05,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 23:27:05,129 INFO L87 Difference]: Start difference. First operand 2330 states and 3366 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 23:27:07,242 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 23:27:13,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 23:27:13,409 INFO L93 Difference]: Finished difference Result 6873 states and 10148 transitions. [2022-07-13 23:27:13,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 23:27:13,411 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-07-13 23:27:13,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 23:27:13,439 INFO L225 Difference]: With dead ends: 6873 [2022-07-13 23:27:13,440 INFO L226 Difference]: Without dead ends: 5734 [2022-07-13 23:27:13,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 23:27:13,449 INFO L413 NwaCegarLoop]: 3008 mSDtfsCounter, 2517 mSDsluCounter, 2458 mSDsCounter, 0 mSdLazyCounter, 1425 mSolverCounterSat, 769 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2811 SdHoareTripleChecker+Valid, 5466 SdHoareTripleChecker+Invalid, 2195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 769 IncrementalHoareTripleChecker+Valid, 1425 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-07-13 23:27:13,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2811 Valid, 5466 Invalid, 2195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [769 Valid, 1425 Invalid, 1 Unknown, 0 Unchecked, 7.9s Time] [2022-07-13 23:27:13,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5734 states. [2022-07-13 23:27:13,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5734 to 4620. [2022-07-13 23:27:13,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4620 states, 3209 states have (on average 1.3549392334060455) internal successors, (4348), 3319 states have internal predecessors, (4348), 1171 states have call successors, (1171), 243 states have call predecessors, (1171), 239 states have return successors, (1159), 1145 states have call predecessors, (1159), 1159 states have call successors, (1159) [2022-07-13 23:27:13,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4620 states to 4620 states and 6678 transitions. [2022-07-13 23:27:13,640 INFO L78 Accepts]: Start accepts. Automaton has 4620 states and 6678 transitions. Word has length 18 [2022-07-13 23:27:13,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 23:27:13,641 INFO L495 AbstractCegarLoop]: Abstraction has 4620 states and 6678 transitions. [2022-07-13 23:27:13,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 23:27:13,641 INFO L276 IsEmpty]: Start isEmpty. Operand 4620 states and 6678 transitions. [2022-07-13 23:27:13,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-13 23:27:13,642 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 23:27:13,642 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 23:27:13,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 23:27:13,643 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 23:27:13,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 23:27:13,643 INFO L85 PathProgramCache]: Analyzing trace with hash 312341314, now seen corresponding path program 1 times [2022-07-13 23:27:13,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 23:27:13,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594226834] [2022-07-13 23:27:13,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 23:27:13,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 23:27:13,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:27:13,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 23:27:13,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:27:13,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 23:27:13,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:27:13,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 23:27:13,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:27:13,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 23:27:13,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:27:13,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 23:27:13,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 23:27:13,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594226834] [2022-07-13 23:27:13,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594226834] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 23:27:13,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 23:27:13,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 23:27:13,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442277245] [2022-07-13 23:27:13,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 23:27:13,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 23:27:13,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 23:27:13,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 23:27:13,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 23:27:13,865 INFO L87 Difference]: Start difference. First operand 4620 states and 6678 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-13 23:27:15,888 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 23:27:20,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 23:27:20,900 INFO L93 Difference]: Finished difference Result 12536 states and 18549 transitions. [2022-07-13 23:27:20,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 23:27:20,900 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 36 [2022-07-13 23:27:20,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 23:27:20,960 INFO L225 Difference]: With dead ends: 12536 [2022-07-13 23:27:20,961 INFO L226 Difference]: Without dead ends: 11382 [2022-07-13 23:27:20,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 23:27:20,975 INFO L413 NwaCegarLoop]: 2290 mSDtfsCounter, 2930 mSDsluCounter, 1987 mSDsCounter, 0 mSdLazyCounter, 1414 mSolverCounterSat, 928 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3221 SdHoareTripleChecker+Valid, 4277 SdHoareTripleChecker+Invalid, 2343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 928 IncrementalHoareTripleChecker+Valid, 1414 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-07-13 23:27:20,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3221 Valid, 4277 Invalid, 2343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [928 Valid, 1414 Invalid, 1 Unknown, 0 Unchecked, 6.7s Time] [2022-07-13 23:27:20,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11382 states. [2022-07-13 23:27:21,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11382 to 8047. [2022-07-13 23:27:21,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8047 states, 5595 states have (on average 1.3549597855227882) internal successors, (7581), 5785 states have internal predecessors, (7581), 2033 states have call successors, (2033), 424 states have call predecessors, (2033), 418 states have return successors, (2019), 1991 states have call predecessors, (2019), 2019 states have call successors, (2019) [2022-07-13 23:27:21,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8047 states to 8047 states and 11633 transitions. [2022-07-13 23:27:21,319 INFO L78 Accepts]: Start accepts. Automaton has 8047 states and 11633 transitions. Word has length 36 [2022-07-13 23:27:21,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 23:27:21,320 INFO L495 AbstractCegarLoop]: Abstraction has 8047 states and 11633 transitions. [2022-07-13 23:27:21,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-13 23:27:21,321 INFO L276 IsEmpty]: Start isEmpty. Operand 8047 states and 11633 transitions. [2022-07-13 23:27:21,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-13 23:27:21,328 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 23:27:21,328 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 23:27:21,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 23:27:21,329 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 23:27:21,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 23:27:21,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1062377866, now seen corresponding path program 1 times [2022-07-13 23:27:21,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 23:27:21,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213927617] [2022-07-13 23:27:21,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 23:27:21,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 23:27:21,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:27:21,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 23:27:21,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:27:21,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 23:27:21,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:27:21,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 23:27:21,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:27:22,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 23:27:22,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:27:22,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 23:27:22,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 23:27:22,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213927617] [2022-07-13 23:27:22,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213927617] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 23:27:22,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 23:27:22,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-13 23:27:22,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654753072] [2022-07-13 23:27:22,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 23:27:22,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 23:27:22,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 23:27:22,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 23:27:22,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2022-07-13 23:27:22,108 INFO L87 Difference]: Start difference. First operand 8047 states and 11633 transitions. Second operand has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-13 23:27:24,130 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 23:27:51,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 23:27:51,851 INFO L93 Difference]: Finished difference Result 23274 states and 34407 transitions. [2022-07-13 23:27:51,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 23:27:51,851 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2022-07-13 23:27:51,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 23:27:51,927 INFO L225 Difference]: With dead ends: 23274 [2022-07-13 23:27:51,927 INFO L226 Difference]: Without dead ends: 17598 [2022-07-13 23:27:51,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2022-07-13 23:27:51,948 INFO L413 NwaCegarLoop]: 2560 mSDtfsCounter, 3598 mSDsluCounter, 19719 mSDsCounter, 0 mSdLazyCounter, 13141 mSolverCounterSat, 1517 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3896 SdHoareTripleChecker+Valid, 22279 SdHoareTripleChecker+Invalid, 14659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1517 IncrementalHoareTripleChecker+Valid, 13141 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.5s IncrementalHoareTripleChecker+Time [2022-07-13 23:27:51,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3896 Valid, 22279 Invalid, 14659 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1517 Valid, 13141 Invalid, 1 Unknown, 0 Unchecked, 28.5s Time] [2022-07-13 23:27:51,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17598 states. [2022-07-13 23:27:52,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17598 to 11508. [2022-07-13 23:27:52,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11508 states, 7999 states have (on average 1.354544318039755) internal successors, (10835), 8269 states have internal predecessors, (10835), 2905 states have call successors, (2905), 610 states have call predecessors, (2905), 603 states have return successors, (2893), 2848 states have call predecessors, (2893), 2890 states have call successors, (2893) [2022-07-13 23:27:52,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11508 states to 11508 states and 16633 transitions. [2022-07-13 23:27:52,528 INFO L78 Accepts]: Start accepts. Automaton has 11508 states and 16633 transitions. Word has length 38 [2022-07-13 23:27:52,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 23:27:52,529 INFO L495 AbstractCegarLoop]: Abstraction has 11508 states and 16633 transitions. [2022-07-13 23:27:52,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-13 23:27:52,529 INFO L276 IsEmpty]: Start isEmpty. Operand 11508 states and 16633 transitions. [2022-07-13 23:27:52,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-13 23:27:52,533 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 23:27:52,533 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 23:27:52,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 23:27:52,533 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 23:27:52,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 23:27:52,534 INFO L85 PathProgramCache]: Analyzing trace with hash -479641513, now seen corresponding path program 1 times [2022-07-13 23:27:52,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 23:27:52,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44404541] [2022-07-13 23:27:52,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 23:27:52,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 23:27:52,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:27:53,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 23:27:53,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:27:53,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 23:27:53,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:27:53,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 23:27:53,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:27:53,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-13 23:27:53,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:27:53,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 23:27:53,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:27:53,911 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 23:27:53,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 23:27:53,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44404541] [2022-07-13 23:27:53,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44404541] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 23:27:53,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 23:27:53,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-07-13 23:27:53,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465276422] [2022-07-13 23:27:53,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 23:27:53,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-13 23:27:53,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 23:27:53,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-13 23:27:53,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2022-07-13 23:27:53,913 INFO L87 Difference]: Start difference. First operand 11508 states and 16633 transitions. Second operand has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-13 23:27:55,939 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 23:28:24,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 23:28:24,127 INFO L93 Difference]: Finished difference Result 18438 states and 27352 transitions. [2022-07-13 23:28:24,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-13 23:28:24,128 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 45 [2022-07-13 23:28:24,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 23:28:24,225 INFO L225 Difference]: With dead ends: 18438 [2022-07-13 23:28:24,226 INFO L226 Difference]: Without dead ends: 17321 [2022-07-13 23:28:24,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=161, Invalid=1171, Unknown=0, NotChecked=0, Total=1332 [2022-07-13 23:28:24,246 INFO L413 NwaCegarLoop]: 2200 mSDtfsCounter, 4361 mSDsluCounter, 17853 mSDsCounter, 0 mSdLazyCounter, 14133 mSolverCounterSat, 1911 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4650 SdHoareTripleChecker+Valid, 20053 SdHoareTripleChecker+Invalid, 16045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1911 IncrementalHoareTripleChecker+Valid, 14133 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.4s IncrementalHoareTripleChecker+Time [2022-07-13 23:28:24,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4650 Valid, 20053 Invalid, 16045 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1911 Valid, 14133 Invalid, 1 Unknown, 0 Unchecked, 28.4s Time] [2022-07-13 23:28:24,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17321 states. [2022-07-13 23:28:25,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17321 to 10399. [2022-07-13 23:28:25,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10399 states, 7231 states have (on average 1.3536163739455125) internal successors, (9788), 7475 states have internal predecessors, (9788), 2620 states have call successors, (2620), 554 states have call predecessors, (2620), 547 states have return successors, (2608), 2567 states have call predecessors, (2608), 2605 states have call successors, (2608) [2022-07-13 23:28:25,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10399 states to 10399 states and 15016 transitions. [2022-07-13 23:28:25,091 INFO L78 Accepts]: Start accepts. Automaton has 10399 states and 15016 transitions. Word has length 45 [2022-07-13 23:28:25,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 23:28:25,093 INFO L495 AbstractCegarLoop]: Abstraction has 10399 states and 15016 transitions. [2022-07-13 23:28:25,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-13 23:28:25,093 INFO L276 IsEmpty]: Start isEmpty. Operand 10399 states and 15016 transitions. [2022-07-13 23:28:25,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-13 23:28:25,095 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 23:28:25,096 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 23:28:25,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 23:28:25,099 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 23:28:25,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 23:28:25,100 INFO L85 PathProgramCache]: Analyzing trace with hash 80113123, now seen corresponding path program 1 times [2022-07-13 23:28:25,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 23:28:25,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482169430] [2022-07-13 23:28:25,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 23:28:25,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 23:28:25,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:28:25,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 23:28:25,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:28:25,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 23:28:25,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:28:25,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 23:28:25,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:28:25,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 23:28:25,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:28:25,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-13 23:28:25,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:28:25,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-13 23:28:25,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:28:25,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 23:28:25,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 23:28:25,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482169430] [2022-07-13 23:28:25,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482169430] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 23:28:25,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 23:28:25,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 23:28:25,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047984464] [2022-07-13 23:28:25,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 23:28:25,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 23:28:25,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 23:28:25,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 23:28:25,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 23:28:25,361 INFO L87 Difference]: Start difference. First operand 10399 states and 15016 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-13 23:28:27,385 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 23:28:29,413 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 23:28:34,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 23:28:34,040 INFO L93 Difference]: Finished difference Result 15673 states and 23232 transitions. [2022-07-13 23:28:34,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 23:28:34,041 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 52 [2022-07-13 23:28:34,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 23:28:34,101 INFO L225 Difference]: With dead ends: 15673 [2022-07-13 23:28:34,101 INFO L226 Difference]: Without dead ends: 15652 [2022-07-13 23:28:34,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 23:28:34,106 INFO L413 NwaCegarLoop]: 3239 mSDtfsCounter, 2419 mSDsluCounter, 2521 mSDsCounter, 0 mSdLazyCounter, 1441 mSolverCounterSat, 670 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2704 SdHoareTripleChecker+Valid, 5760 SdHoareTripleChecker+Invalid, 2113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 670 IncrementalHoareTripleChecker+Valid, 1441 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-07-13 23:28:34,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2704 Valid, 5760 Invalid, 2113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [670 Valid, 1441 Invalid, 2 Unknown, 0 Unchecked, 7.9s Time] [2022-07-13 23:28:34,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15652 states. [2022-07-13 23:28:34,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15652 to 8137. [2022-07-13 23:28:34,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8137 states, 5661 states have (on average 1.3511747041158806) internal successors, (7649), 5853 states have internal predecessors, (7649), 2046 states have call successors, (2046), 436 states have call predecessors, (2046), 429 states have return successors, (2036), 2001 states have call predecessors, (2036), 2033 states have call successors, (2036) [2022-07-13 23:28:34,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8137 states to 8137 states and 11731 transitions. [2022-07-13 23:28:34,537 INFO L78 Accepts]: Start accepts. Automaton has 8137 states and 11731 transitions. Word has length 52 [2022-07-13 23:28:34,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 23:28:34,538 INFO L495 AbstractCegarLoop]: Abstraction has 8137 states and 11731 transitions. [2022-07-13 23:28:34,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-13 23:28:34,538 INFO L276 IsEmpty]: Start isEmpty. Operand 8137 states and 11731 transitions. [2022-07-13 23:28:34,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-13 23:28:34,540 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 23:28:34,540 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 23:28:34,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 23:28:34,540 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 23:28:34,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 23:28:34,541 INFO L85 PathProgramCache]: Analyzing trace with hash 139061074, now seen corresponding path program 1 times [2022-07-13 23:28:34,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 23:28:34,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258171434] [2022-07-13 23:28:34,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 23:28:34,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 23:28:34,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:28:34,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 23:28:34,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:28:34,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 23:28:34,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:28:35,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 23:28:35,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:28:35,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 23:28:35,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:28:35,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 23:28:35,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:28:35,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-13 23:28:35,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:28:35,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-13 23:28:35,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:28:35,095 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 23:28:35,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 23:28:35,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258171434] [2022-07-13 23:28:35,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258171434] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 23:28:35,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944973030] [2022-07-13 23:28:35,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 23:28:35,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 23:28:35,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 23:28:35,098 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 23:28:35,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 23:28:42,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:28:42,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 2111 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-13 23:28:42,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 23:28:43,018 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 23:28:43,019 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 23:28:43,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944973030] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 23:28:43,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 23:28:43,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 14 [2022-07-13 23:28:43,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237910884] [2022-07-13 23:28:43,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 23:28:43,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 23:28:43,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 23:28:43,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 23:28:43,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-07-13 23:28:43,021 INFO L87 Difference]: Start difference. First operand 8137 states and 11731 transitions. Second operand has 10 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-13 23:28:43,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 23:28:43,837 INFO L93 Difference]: Finished difference Result 10382 states and 14988 transitions. [2022-07-13 23:28:43,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 23:28:43,838 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 53 [2022-07-13 23:28:43,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 23:28:43,866 INFO L225 Difference]: With dead ends: 10382 [2022-07-13 23:28:43,866 INFO L226 Difference]: Without dead ends: 5817 [2022-07-13 23:28:43,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2022-07-13 23:28:43,884 INFO L413 NwaCegarLoop]: 1709 mSDtfsCounter, 261 mSDsluCounter, 9857 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 11566 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 23:28:43,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 11566 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 23:28:43,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5817 states. [2022-07-13 23:28:44,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5817 to 5809. [2022-07-13 23:28:44,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5809 states, 4038 states have (on average 1.3506686478454681) internal successors, (5454), 4173 states have internal predecessors, (5454), 1462 states have call successors, (1462), 313 states have call predecessors, (1462), 308 states have return successors, (1458), 1432 states have call predecessors, (1458), 1455 states have call successors, (1458) [2022-07-13 23:28:44,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5809 states to 5809 states and 8374 transitions. [2022-07-13 23:28:44,231 INFO L78 Accepts]: Start accepts. Automaton has 5809 states and 8374 transitions. Word has length 53 [2022-07-13 23:28:44,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 23:28:44,231 INFO L495 AbstractCegarLoop]: Abstraction has 5809 states and 8374 transitions. [2022-07-13 23:28:44,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-13 23:28:44,232 INFO L276 IsEmpty]: Start isEmpty. Operand 5809 states and 8374 transitions. [2022-07-13 23:28:44,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-13 23:28:44,233 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 23:28:44,233 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 23:28:44,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 23:28:44,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 23:28:44,447 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 23:28:44,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 23:28:44,447 INFO L85 PathProgramCache]: Analyzing trace with hash 762935669, now seen corresponding path program 1 times [2022-07-13 23:28:44,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 23:28:44,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937969399] [2022-07-13 23:28:44,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 23:28:44,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 23:28:44,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:28:44,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 23:28:44,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:28:44,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 23:28:44,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:28:44,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 23:28:44,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:28:44,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 23:28:44,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:28:44,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-13 23:28:44,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:28:44,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-13 23:28:44,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:28:44,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-13 23:28:44,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:28:44,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 23:28:44,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 23:28:44,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937969399] [2022-07-13 23:28:44,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937969399] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 23:28:44,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 23:28:44,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 23:28:44,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949159893] [2022-07-13 23:28:44,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 23:28:44,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 23:28:44,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 23:28:44,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 23:28:44,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 23:28:44,799 INFO L87 Difference]: Start difference. First operand 5809 states and 8374 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-13 23:28:46,822 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 23:28:48,850 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 23:29:13,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 23:29:13,461 INFO L93 Difference]: Finished difference Result 9365 states and 13991 transitions. [2022-07-13 23:29:13,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 23:29:13,462 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 64 [2022-07-13 23:29:13,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 23:29:13,557 INFO L225 Difference]: With dead ends: 9365 [2022-07-13 23:29:13,564 INFO L226 Difference]: Without dead ends: 8228 [2022-07-13 23:29:13,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-07-13 23:29:13,591 INFO L413 NwaCegarLoop]: 2313 mSDtfsCounter, 3172 mSDsluCounter, 3855 mSDsCounter, 0 mSdLazyCounter, 7850 mSolverCounterSat, 1826 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3410 SdHoareTripleChecker+Valid, 6168 SdHoareTripleChecker+Invalid, 9678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1826 IncrementalHoareTripleChecker+Valid, 7850 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.6s IncrementalHoareTripleChecker+Time [2022-07-13 23:29:13,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3410 Valid, 6168 Invalid, 9678 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1826 Valid, 7850 Invalid, 2 Unknown, 0 Unchecked, 27.6s Time] [2022-07-13 23:29:13,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8228 states. [2022-07-13 23:29:14,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8228 to 5798. [2022-07-13 23:29:14,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5798 states, 4032 states have (on average 1.3504464285714286) internal successors, (5445), 4165 states have internal predecessors, (5445), 1457 states have call successors, (1457), 313 states have call predecessors, (1457), 308 states have return successors, (1454), 1429 states have call predecessors, (1454), 1451 states have call successors, (1454) [2022-07-13 23:29:14,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5798 states to 5798 states and 8356 transitions. [2022-07-13 23:29:14,240 INFO L78 Accepts]: Start accepts. Automaton has 5798 states and 8356 transitions. Word has length 64 [2022-07-13 23:29:14,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 23:29:14,241 INFO L495 AbstractCegarLoop]: Abstraction has 5798 states and 8356 transitions. [2022-07-13 23:29:14,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-13 23:29:14,241 INFO L276 IsEmpty]: Start isEmpty. Operand 5798 states and 8356 transitions. [2022-07-13 23:29:14,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-13 23:29:14,242 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 23:29:14,242 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 23:29:14,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 23:29:14,243 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 23:29:14,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 23:29:14,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1307494641, now seen corresponding path program 1 times [2022-07-13 23:29:14,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 23:29:14,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269752430] [2022-07-13 23:29:14,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 23:29:14,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 23:29:14,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:29:14,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 23:29:14,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:29:14,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 23:29:14,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:29:14,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 23:29:14,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:29:14,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 23:29:14,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:29:14,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-13 23:29:14,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:29:14,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-13 23:29:14,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:29:14,512 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 23:29:14,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 23:29:14,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269752430] [2022-07-13 23:29:14,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269752430] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 23:29:14,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 23:29:14,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 23:29:14,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602981566] [2022-07-13 23:29:14,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 23:29:14,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 23:29:14,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 23:29:14,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 23:29:14,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 23:29:14,514 INFO L87 Difference]: Start difference. First operand 5798 states and 8356 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-13 23:29:16,537 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 23:29:23,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 23:29:23,502 INFO L93 Difference]: Finished difference Result 7437 states and 11043 transitions. [2022-07-13 23:29:23,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 23:29:23,503 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 63 [2022-07-13 23:29:23,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 23:29:23,528 INFO L225 Difference]: With dead ends: 7437 [2022-07-13 23:29:23,528 INFO L226 Difference]: Without dead ends: 7432 [2022-07-13 23:29:23,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-13 23:29:23,531 INFO L413 NwaCegarLoop]: 2050 mSDtfsCounter, 1378 mSDsluCounter, 4224 mSDsCounter, 0 mSdLazyCounter, 2425 mSolverCounterSat, 710 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1569 SdHoareTripleChecker+Valid, 6274 SdHoareTripleChecker+Invalid, 3136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 710 IncrementalHoareTripleChecker+Valid, 2425 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2022-07-13 23:29:23,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1569 Valid, 6274 Invalid, 3136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [710 Valid, 2425 Invalid, 1 Unknown, 0 Unchecked, 8.3s Time] [2022-07-13 23:29:23,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7432 states. [2022-07-13 23:29:23,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7432 to 5792. [2022-07-13 23:29:23,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5792 states, 4027 states have (on average 1.3498882542835857) internal successors, (5436), 4159 states have internal predecessors, (5436), 1456 states have call successors, (1456), 313 states have call predecessors, (1456), 308 states have return successors, (1454), 1429 states have call predecessors, (1454), 1451 states have call successors, (1454) [2022-07-13 23:29:23,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5792 states to 5792 states and 8346 transitions. [2022-07-13 23:29:23,978 INFO L78 Accepts]: Start accepts. Automaton has 5792 states and 8346 transitions. Word has length 63 [2022-07-13 23:29:23,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 23:29:23,979 INFO L495 AbstractCegarLoop]: Abstraction has 5792 states and 8346 transitions. [2022-07-13 23:29:23,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-13 23:29:23,979 INFO L276 IsEmpty]: Start isEmpty. Operand 5792 states and 8346 transitions. [2022-07-13 23:29:23,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-13 23:29:23,980 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 23:29:23,980 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 23:29:23,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-13 23:29:23,981 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 23:29:23,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 23:29:23,981 INFO L85 PathProgramCache]: Analyzing trace with hash -384487029, now seen corresponding path program 1 times [2022-07-13 23:29:23,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 23:29:23,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524582584] [2022-07-13 23:29:23,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 23:29:23,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 23:29:24,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:29:24,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 23:29:24,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:29:24,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 23:29:24,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:29:24,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 23:29:24,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:29:24,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 23:29:24,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:29:24,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-13 23:29:24,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:29:24,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-13 23:29:24,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:29:24,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-13 23:29:24,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:29:24,650 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 23:29:24,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 23:29:24,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524582584] [2022-07-13 23:29:24,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524582584] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 23:29:24,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816316338] [2022-07-13 23:29:24,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 23:29:24,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 23:29:24,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 23:29:24,654 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 23:29:24,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 23:29:25,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:29:25,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 2168 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-13 23:29:25,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 23:29:25,761 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 23:29:25,761 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 23:29:25,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816316338] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 23:29:25,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 23:29:25,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 15 [2022-07-13 23:29:25,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577225248] [2022-07-13 23:29:25,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 23:29:25,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 23:29:25,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 23:29:25,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 23:29:25,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2022-07-13 23:29:25,763 INFO L87 Difference]: Start difference. First operand 5792 states and 8346 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-13 23:29:26,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 23:29:26,566 INFO L93 Difference]: Finished difference Result 7744 states and 11292 transitions. [2022-07-13 23:29:26,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 23:29:26,574 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2022-07-13 23:29:26,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 23:29:26,604 INFO L225 Difference]: With dead ends: 7744 [2022-07-13 23:29:26,604 INFO L226 Difference]: Without dead ends: 4324 [2022-07-13 23:29:26,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-07-13 23:29:26,629 INFO L413 NwaCegarLoop]: 2070 mSDtfsCounter, 962 mSDsluCounter, 7466 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 445 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1075 SdHoareTripleChecker+Valid, 9536 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 445 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 23:29:26,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1075 Valid, 9536 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [445 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 23:29:26,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4324 states. [2022-07-13 23:29:26,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4324 to 3544. [2022-07-13 23:29:26,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3544 states, 2468 states have (on average 1.342382495948136) internal successors, (3313), 2546 states have internal predecessors, (3313), 880 states have call successors, (880), 198 states have call predecessors, (880), 195 states have return successors, (879), 865 states have call predecessors, (879), 876 states have call successors, (879) [2022-07-13 23:29:26,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3544 states to 3544 states and 5072 transitions. [2022-07-13 23:29:26,930 INFO L78 Accepts]: Start accepts. Automaton has 3544 states and 5072 transitions. Word has length 66 [2022-07-13 23:29:26,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 23:29:26,931 INFO L495 AbstractCegarLoop]: Abstraction has 3544 states and 5072 transitions. [2022-07-13 23:29:26,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-13 23:29:26,931 INFO L276 IsEmpty]: Start isEmpty. Operand 3544 states and 5072 transitions. [2022-07-13 23:29:26,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-13 23:29:26,932 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 23:29:26,932 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 23:29:26,958 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-13 23:29:27,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-13 23:29:27,155 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 23:29:27,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 23:29:27,156 INFO L85 PathProgramCache]: Analyzing trace with hash -2013478679, now seen corresponding path program 1 times [2022-07-13 23:29:27,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 23:29:27,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619510713] [2022-07-13 23:29:27,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 23:29:27,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 23:29:27,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:29:27,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 23:29:27,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:29:27,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 23:29:27,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:29:27,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 23:29:27,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:29:27,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 23:29:27,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:29:27,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-13 23:29:27,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:29:27,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-13 23:29:27,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:29:27,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-07-13 23:29:27,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:29:27,585 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 23:29:27,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 23:29:27,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619510713] [2022-07-13 23:29:27,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619510713] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 23:29:27,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 23:29:27,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 23:29:27,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830362142] [2022-07-13 23:29:27,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 23:29:27,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 23:29:27,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 23:29:27,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 23:29:27,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 23:29:27,587 INFO L87 Difference]: Start difference. First operand 3544 states and 5072 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-13 23:29:29,624 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 23:29:39,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 23:29:39,511 INFO L93 Difference]: Finished difference Result 6888 states and 10119 transitions. [2022-07-13 23:29:39,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 23:29:39,512 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 69 [2022-07-13 23:29:39,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 23:29:39,529 INFO L225 Difference]: With dead ends: 6888 [2022-07-13 23:29:39,529 INFO L226 Difference]: Without dead ends: 4620 [2022-07-13 23:29:39,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-07-13 23:29:39,537 INFO L413 NwaCegarLoop]: 2453 mSDtfsCounter, 1607 mSDsluCounter, 6815 mSDsCounter, 0 mSdLazyCounter, 3633 mSolverCounterSat, 814 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1797 SdHoareTripleChecker+Valid, 9268 SdHoareTripleChecker+Invalid, 4448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 814 IncrementalHoareTripleChecker+Valid, 3633 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2022-07-13 23:29:39,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1797 Valid, 9268 Invalid, 4448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [814 Valid, 3633 Invalid, 1 Unknown, 0 Unchecked, 11.2s Time] [2022-07-13 23:29:39,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4620 states. [2022-07-13 23:29:39,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4620 to 3525. [2022-07-13 23:29:39,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3525 states, 2456 states have (on average 1.3424267100977199) internal successors, (3297), 2533 states have internal predecessors, (3297), 875 states have call successors, (875), 194 states have call predecessors, (875), 193 states have return successors, (875), 863 states have call predecessors, (875), 872 states have call successors, (875) [2022-07-13 23:29:39,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3525 states to 3525 states and 5047 transitions. [2022-07-13 23:29:39,830 INFO L78 Accepts]: Start accepts. Automaton has 3525 states and 5047 transitions. Word has length 69 [2022-07-13 23:29:39,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 23:29:39,831 INFO L495 AbstractCegarLoop]: Abstraction has 3525 states and 5047 transitions. [2022-07-13 23:29:39,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-13 23:29:39,831 INFO L276 IsEmpty]: Start isEmpty. Operand 3525 states and 5047 transitions. [2022-07-13 23:29:39,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-13 23:29:39,832 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 23:29:39,833 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 23:29:39,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-13 23:29:39,833 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 23:29:39,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 23:29:39,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1690739862, now seen corresponding path program 1 times [2022-07-13 23:29:39,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 23:29:39,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476979486] [2022-07-13 23:29:39,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 23:29:39,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 23:29:39,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:29:40,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 23:29:40,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:29:40,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 23:29:40,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:29:40,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 23:29:40,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:29:40,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 23:29:40,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:29:40,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-13 23:29:40,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:29:40,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-13 23:29:40,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:29:40,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-13 23:29:40,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:29:40,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-13 23:29:40,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:29:40,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-07-13 23:29:40,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:29:40,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 23:29:40,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 23:29:40,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476979486] [2022-07-13 23:29:40,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476979486] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 23:29:40,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 23:29:40,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-13 23:29:40,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123117235] [2022-07-13 23:29:40,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 23:29:40,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 23:29:40,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 23:29:40,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 23:29:40,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2022-07-13 23:29:40,599 INFO L87 Difference]: Start difference. First operand 3525 states and 5047 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 11 states have internal predecessors, (51), 3 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-13 23:29:42,626 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 23:29:44,661 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 23:30:16,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 23:30:16,841 INFO L93 Difference]: Finished difference Result 6571 states and 9626 transitions. [2022-07-13 23:30:16,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 23:30:16,841 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 11 states have internal predecessors, (51), 3 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 71 [2022-07-13 23:30:16,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 23:30:16,854 INFO L225 Difference]: With dead ends: 6571 [2022-07-13 23:30:16,854 INFO L226 Difference]: Without dead ends: 4321 [2022-07-13 23:30:16,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-07-13 23:30:16,861 INFO L413 NwaCegarLoop]: 1595 mSDtfsCounter, 2088 mSDsluCounter, 3788 mSDsCounter, 0 mSdLazyCounter, 14259 mSolverCounterSat, 851 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2329 SdHoareTripleChecker+Valid, 5383 SdHoareTripleChecker+Invalid, 15112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 851 IncrementalHoareTripleChecker+Valid, 14259 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.1s IncrementalHoareTripleChecker+Time [2022-07-13 23:30:16,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2329 Valid, 5383 Invalid, 15112 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [851 Valid, 14259 Invalid, 2 Unknown, 0 Unchecked, 35.1s Time] [2022-07-13 23:30:16,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4321 states. [2022-07-13 23:30:17,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4321 to 3495. [2022-07-13 23:30:17,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3495 states, 2434 states have (on average 1.3447000821692687) internal successors, (3273), 2511 states have internal predecessors, (3273), 871 states have call successors, (871), 190 states have call predecessors, (871), 189 states have return successors, (871), 859 states have call predecessors, (871), 868 states have call successors, (871) [2022-07-13 23:30:17,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3495 states to 3495 states and 5015 transitions. [2022-07-13 23:30:17,127 INFO L78 Accepts]: Start accepts. Automaton has 3495 states and 5015 transitions. Word has length 71 [2022-07-13 23:30:17,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 23:30:17,127 INFO L495 AbstractCegarLoop]: Abstraction has 3495 states and 5015 transitions. [2022-07-13 23:30:17,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 11 states have internal predecessors, (51), 3 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-13 23:30:17,127 INFO L276 IsEmpty]: Start isEmpty. Operand 3495 states and 5015 transitions. [2022-07-13 23:30:17,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-13 23:30:17,128 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 23:30:17,129 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 23:30:17,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-13 23:30:17,129 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 23:30:17,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 23:30:17,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1250189697, now seen corresponding path program 1 times [2022-07-13 23:30:17,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 23:30:17,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360604038] [2022-07-13 23:30:17,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 23:30:17,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 23:30:17,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:30:17,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 23:30:17,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:30:17,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 23:30:17,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:30:17,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 23:30:17,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:30:17,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 23:30:17,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:30:17,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-13 23:30:17,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:30:17,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-13 23:30:17,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:30:17,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-13 23:30:17,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:30:17,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-13 23:30:17,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:30:17,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-13 23:30:17,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:30:17,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 23:30:17,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 23:30:17,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360604038] [2022-07-13 23:30:17,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360604038] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 23:30:17,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 23:30:17,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 23:30:17,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597431571] [2022-07-13 23:30:17,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 23:30:17,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 23:30:17,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 23:30:17,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 23:30:17,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 23:30:17,343 INFO L87 Difference]: Start difference. First operand 3495 states and 5015 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-13 23:30:19,383 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 23:30:21,411 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 23:30:23,437 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 23:30:34,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 23:30:34,140 INFO L93 Difference]: Finished difference Result 5712 states and 8436 transitions. [2022-07-13 23:30:34,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 23:30:34,140 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 79 [2022-07-13 23:30:34,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 23:30:34,159 INFO L225 Difference]: With dead ends: 5712 [2022-07-13 23:30:34,159 INFO L226 Difference]: Without dead ends: 5697 [2022-07-13 23:30:34,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-13 23:30:34,163 INFO L413 NwaCegarLoop]: 2105 mSDtfsCounter, 4628 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 3396 mSolverCounterSat, 1972 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4862 SdHoareTripleChecker+Valid, 3181 SdHoareTripleChecker+Invalid, 5371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1972 IncrementalHoareTripleChecker+Valid, 3396 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.1s IncrementalHoareTripleChecker+Time [2022-07-13 23:30:34,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4862 Valid, 3181 Invalid, 5371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1972 Valid, 3396 Invalid, 3 Unknown, 0 Unchecked, 16.1s Time] [2022-07-13 23:30:34,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5697 states. [2022-07-13 23:30:34,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5697 to 2372. [2022-07-13 23:30:34,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2372 states, 1655 states have (on average 1.3371601208459214) internal successors, (2213), 1706 states have internal predecessors, (2213), 585 states have call successors, (585), 131 states have call predecessors, (585), 131 states have return successors, (587), 578 states have call predecessors, (587), 584 states have call successors, (587) [2022-07-13 23:30:34,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2372 states to 2372 states and 3385 transitions. [2022-07-13 23:30:34,435 INFO L78 Accepts]: Start accepts. Automaton has 2372 states and 3385 transitions. Word has length 79 [2022-07-13 23:30:34,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 23:30:34,435 INFO L495 AbstractCegarLoop]: Abstraction has 2372 states and 3385 transitions. [2022-07-13 23:30:34,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-13 23:30:34,436 INFO L276 IsEmpty]: Start isEmpty. Operand 2372 states and 3385 transitions. [2022-07-13 23:30:34,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-13 23:30:34,437 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 23:30:34,437 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 23:30:34,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-13 23:30:34,438 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 23:30:34,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 23:30:34,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1557420679, now seen corresponding path program 1 times [2022-07-13 23:30:34,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 23:30:34,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434294212] [2022-07-13 23:30:34,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 23:30:34,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 23:30:34,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:30:34,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 23:30:34,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:30:34,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 23:30:34,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:30:34,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 23:30:34,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:30:34,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 23:30:34,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:30:34,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-13 23:30:34,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:30:34,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-13 23:30:34,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:30:34,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-13 23:30:34,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:30:34,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-07-13 23:30:34,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:30:34,832 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 23:30:34,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 23:30:34,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434294212] [2022-07-13 23:30:34,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434294212] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 23:30:34,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 23:30:34,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-13 23:30:34,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914709941] [2022-07-13 23:30:34,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 23:30:34,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 23:30:34,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 23:30:34,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 23:30:34,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-07-13 23:30:34,834 INFO L87 Difference]: Start difference. First operand 2372 states and 3385 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 9 states have internal predecessors, (58), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-13 23:30:36,857 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 23:30:49,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 23:30:49,000 INFO L93 Difference]: Finished difference Result 4297 states and 6333 transitions. [2022-07-13 23:30:49,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 23:30:49,001 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 9 states have internal predecessors, (58), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 77 [2022-07-13 23:30:49,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 23:30:49,010 INFO L225 Difference]: With dead ends: 4297 [2022-07-13 23:30:49,011 INFO L226 Difference]: Without dead ends: 3184 [2022-07-13 23:30:49,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-07-13 23:30:49,015 INFO L413 NwaCegarLoop]: 2086 mSDtfsCounter, 1919 mSDsluCounter, 10423 mSDsCounter, 0 mSdLazyCounter, 5501 mSolverCounterSat, 999 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2107 SdHoareTripleChecker+Valid, 12509 SdHoareTripleChecker+Invalid, 6501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 999 IncrementalHoareTripleChecker+Valid, 5501 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.5s IncrementalHoareTripleChecker+Time [2022-07-13 23:30:49,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2107 Valid, 12509 Invalid, 6501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [999 Valid, 5501 Invalid, 1 Unknown, 0 Unchecked, 13.5s Time] [2022-07-13 23:30:49,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3184 states. [2022-07-13 23:30:49,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3184 to 2372. [2022-07-13 23:30:49,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2372 states, 1655 states have (on average 1.33595166163142) internal successors, (2211), 1706 states have internal predecessors, (2211), 585 states have call successors, (585), 131 states have call predecessors, (585), 131 states have return successors, (587), 578 states have call predecessors, (587), 584 states have call successors, (587) [2022-07-13 23:30:49,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2372 states to 2372 states and 3383 transitions. [2022-07-13 23:30:49,327 INFO L78 Accepts]: Start accepts. Automaton has 2372 states and 3383 transitions. Word has length 77 [2022-07-13 23:30:49,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 23:30:49,328 INFO L495 AbstractCegarLoop]: Abstraction has 2372 states and 3383 transitions. [2022-07-13 23:30:49,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 9 states have internal predecessors, (58), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-13 23:30:49,328 INFO L276 IsEmpty]: Start isEmpty. Operand 2372 states and 3383 transitions. [2022-07-13 23:30:49,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-13 23:30:49,334 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 23:30:49,334 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 23:30:49,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-13 23:30:49,334 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 23:30:49,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 23:30:49,335 INFO L85 PathProgramCache]: Analyzing trace with hash 221854498, now seen corresponding path program 1 times [2022-07-13 23:30:49,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 23:30:49,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539418730] [2022-07-13 23:30:49,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 23:30:49,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 23:30:49,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:30:49,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 23:30:49,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:30:49,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 23:30:49,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:30:49,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 23:30:49,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:30:49,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 23:30:49,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:30:49,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-13 23:30:49,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:30:49,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-13 23:30:49,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:30:49,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-13 23:30:49,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:30:49,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-13 23:30:49,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:30:49,543 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-13 23:30:49,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 23:30:49,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539418730] [2022-07-13 23:30:49,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539418730] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 23:30:49,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 23:30:49,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 23:30:49,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774598007] [2022-07-13 23:30:49,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 23:30:49,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 23:30:49,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 23:30:49,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 23:30:49,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 23:30:49,545 INFO L87 Difference]: Start difference. First operand 2372 states and 3383 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-13 23:30:51,588 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 23:30:53,640 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-13 23:30:59,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 23:30:59,138 INFO L93 Difference]: Finished difference Result 4311 states and 6351 transitions. [2022-07-13 23:30:59,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 23:30:59,139 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 79 [2022-07-13 23:30:59,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 23:30:59,148 INFO L225 Difference]: With dead ends: 4311 [2022-07-13 23:30:59,148 INFO L226 Difference]: Without dead ends: 2916 [2022-07-13 23:30:59,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 23:30:59,159 INFO L413 NwaCegarLoop]: 2803 mSDtfsCounter, 2363 mSDsluCounter, 2078 mSDsCounter, 0 mSdLazyCounter, 1392 mSolverCounterSat, 777 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2641 SdHoareTripleChecker+Valid, 4881 SdHoareTripleChecker+Invalid, 2171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 777 IncrementalHoareTripleChecker+Valid, 1392 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2022-07-13 23:30:59,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2641 Valid, 4881 Invalid, 2171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [777 Valid, 1392 Invalid, 2 Unknown, 0 Unchecked, 9.0s Time] [2022-07-13 23:30:59,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2916 states. [2022-07-13 23:30:59,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2916 to 2366. [2022-07-13 23:30:59,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2366 states, 1649 states have (on average 1.335961188599151) internal successors, (2203), 1700 states have internal predecessors, (2203), 585 states have call successors, (585), 131 states have call predecessors, (585), 131 states have return successors, (587), 578 states have call predecessors, (587), 584 states have call successors, (587) [2022-07-13 23:30:59,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2366 states to 2366 states and 3375 transitions. [2022-07-13 23:30:59,428 INFO L78 Accepts]: Start accepts. Automaton has 2366 states and 3375 transitions. Word has length 79 [2022-07-13 23:30:59,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 23:30:59,428 INFO L495 AbstractCegarLoop]: Abstraction has 2366 states and 3375 transitions. [2022-07-13 23:30:59,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-13 23:30:59,429 INFO L276 IsEmpty]: Start isEmpty. Operand 2366 states and 3375 transitions. [2022-07-13 23:30:59,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-13 23:30:59,430 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 23:30:59,430 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 23:30:59,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-13 23:30:59,430 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 23:30:59,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 23:30:59,430 INFO L85 PathProgramCache]: Analyzing trace with hash 241377121, now seen corresponding path program 1 times [2022-07-13 23:30:59,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 23:30:59,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33679543] [2022-07-13 23:30:59,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 23:30:59,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 23:30:59,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:30:59,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 23:30:59,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:30:59,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 23:30:59,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:30:59,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 23:30:59,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:30:59,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 23:30:59,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:30:59,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-13 23:30:59,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:30:59,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-13 23:30:59,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:30:59,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-13 23:30:59,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:30:59,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-13 23:30:59,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:30:59,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-13 23:30:59,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:30:59,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-07-13 23:30:59,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:30:59,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-07-13 23:30:59,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:30:59,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-07-13 23:30:59,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 23:30:59,707 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-13 23:30:59,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 23:30:59,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33679543] [2022-07-13 23:30:59,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33679543] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 23:30:59,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 23:30:59,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 23:30:59,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107828176] [2022-07-13 23:30:59,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 23:30:59,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 23:30:59,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 23:30:59,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 23:30:59,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 23:30:59,712 INFO L87 Difference]: Start difference. First operand 2366 states and 3375 transitions. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 5 states have internal predecessors, (69), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12)