java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 02:49:19,462 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 02:49:19,464 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 02:49:19,476 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 02:49:19,476 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 02:49:19,477 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 02:49:19,479 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 02:49:19,481 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 02:49:19,490 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 02:49:19,492 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 02:49:19,493 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 02:49:19,494 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 02:49:19,495 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 02:49:19,496 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 02:49:19,496 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 02:49:19,497 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 02:49:19,498 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 02:49:19,501 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 02:49:19,503 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 02:49:19,505 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 02:49:19,509 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 02:49:19,511 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 02:49:19,513 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 02:49:19,514 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 02:49:19,518 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 02:49:19,518 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 02:49:19,518 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 02:49:19,519 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 02:49:19,521 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 02:49:19,522 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 02:49:19,523 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 02:49:19,526 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 02:49:19,527 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 02:49:19,527 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 02:49:19,529 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 02:49:19,529 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 02:49:19,531 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 02:49:19,531 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 02:49:19,531 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 02:49:19,532 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 02:49:19,533 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 02:49:19,536 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 02:49:19,550 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 02:49:19,550 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 02:49:19,552 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 02:49:19,552 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 02:49:19,552 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 02:49:19,552 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 02:49:19,553 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 02:49:19,553 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 02:49:19,553 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 02:49:19,553 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 02:49:19,554 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 02:49:19,554 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 02:49:19,554 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 02:49:19,554 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 02:49:19,554 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 02:49:19,555 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 02:49:19,555 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 02:49:19,555 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 02:49:19,555 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 02:49:19,556 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 02:49:19,556 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 02:49:19,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 02:49:19,556 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 02:49:19,557 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 02:49:19,557 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 02:49:19,557 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 02:49:19,557 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 02:49:19,557 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 02:49:19,558 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 02:49:19,890 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 02:49:19,913 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 02:49:19,916 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 02:49:19,917 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 02:49:19,917 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 02:49:19,918 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i [2019-10-15 02:49:19,977 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9821203e7/b1aeeb4ee26145e9bba2aa24f830b001/FLAG66bbedd75 [2019-10-15 02:49:20,723 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 02:49:20,724 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i [2019-10-15 02:49:20,752 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9821203e7/b1aeeb4ee26145e9bba2aa24f830b001/FLAG66bbedd75 [2019-10-15 02:49:20,806 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9821203e7/b1aeeb4ee26145e9bba2aa24f830b001 [2019-10-15 02:49:20,815 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 02:49:20,816 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 02:49:20,817 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 02:49:20,818 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 02:49:20,821 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 02:49:20,822 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 02:49:20" (1/1) ... [2019-10-15 02:49:20,824 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b14b460 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:49:20, skipping insertion in model container [2019-10-15 02:49:20,824 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 02:49:20" (1/1) ... [2019-10-15 02:49:20,831 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 02:49:20,919 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 02:49:22,122 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 02:49:22,147 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 02:49:22,293 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 02:49:22,376 INFO L192 MainTranslator]: Completed translation [2019-10-15 02:49:22,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:49:22 WrapperNode [2019-10-15 02:49:22,377 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 02:49:22,378 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 02:49:22,378 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 02:49:22,378 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 02:49:22,394 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:49:22" (1/1) ... [2019-10-15 02:49:22,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:49:22" (1/1) ... [2019-10-15 02:49:22,460 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:49:22" (1/1) ... [2019-10-15 02:49:22,461 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:49:22" (1/1) ... [2019-10-15 02:49:22,511 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:49:22" (1/1) ... [2019-10-15 02:49:22,541 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:49:22" (1/1) ... [2019-10-15 02:49:22,558 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:49:22" (1/1) ... [2019-10-15 02:49:22,592 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 02:49:22,592 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 02:49:22,592 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 02:49:22,593 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 02:49:22,595 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:49:22" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 02:49:22,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 02:49:22,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 02:49:22,684 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2019-10-15 02:49:22,684 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2019-10-15 02:49:22,685 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2019-10-15 02:49:22,686 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_clear_bit [2019-10-15 02:49:22,688 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2019-10-15 02:49:22,688 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2019-10-15 02:49:22,688 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2019-10-15 02:49:22,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2019-10-15 02:49:22,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2019-10-15 02:49:22,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2019-10-15 02:49:22,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2019-10-15 02:49:22,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2019-10-15 02:49:22,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_ptr [2019-10-15 02:49:22,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_ulong [2019-10-15 02:49:22,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2019-10-15 02:49:22,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2019-10-15 02:49:22,696 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2019-10-15 02:49:22,697 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_enter [2019-10-15 02:49:22,697 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_exit [2019-10-15 02:49:22,698 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_select [2019-10-15 02:49:22,699 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_inb [2019-10-15 02:49:22,699 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_outb [2019-10-15 02:49:22,699 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_inw [2019-10-15 02:49:22,699 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_outw [2019-10-15 02:49:22,699 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_update_timeout [2019-10-15 02:49:22,699 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_round_time [2019-10-15 02:49:22,699 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_keepalive [2019-10-15 02:49:22,700 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_start [2019-10-15 02:49:22,700 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_stop [2019-10-15 02:49:22,700 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_set_timeout [2019-10-15 02:49:22,700 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_get_status [2019-10-15 02:49:22,700 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_open [2019-10-15 02:49:22,701 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_release [2019-10-15 02:49:22,702 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_write [2019-10-15 02:49:22,702 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_ioctl [2019-10-15 02:49:22,702 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_notify_sys [2019-10-15 02:49:22,702 INFO L138 BoogieDeclarations]: Found implementation of procedure it87_wdt_init [2019-10-15 02:49:22,702 INFO L138 BoogieDeclarations]: Found implementation of procedure it87_wdt_exit [2019-10-15 02:49:22,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_file_operations_2 [2019-10-15 02:49:22,702 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 02:49:22,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv___module_get_5 [2019-10-15 02:49:22,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_nonseekable_open_6 [2019-10-15 02:49:22,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_misc_register_7 [2019-10-15 02:49:22,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_misc_deregister_8 [2019-10-15 02:49:22,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2019-10-15 02:49:22,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2019-10-15 02:49:22,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_err_ptr [2019-10-15 02:49:22,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_ptr_err [2019-10-15 02:49:22,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err_or_null [2019-10-15 02:49:22,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_get [2019-10-15 02:49:22,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_try_module_get [2019-10-15 02:49:22,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put [2019-10-15 02:49:22,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put_and_exit [2019-10-15 02:49:22,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_refcount [2019-10-15 02:49:22,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2019-10-15 02:49:22,705 INFO L138 BoogieDeclarations]: Found implementation of procedure __copy_to_user_overflow [2019-10-15 02:49:22,705 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_fault [2019-10-15 02:49:22,706 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2019-10-15 02:49:22,706 INFO L138 BoogieDeclarations]: Found implementation of procedure __request_region [2019-10-15 02:49:22,706 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_to_user [2019-10-15 02:49:22,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize [2019-10-15 02:49:22,707 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_deregister [2019-10-15 02:49:22,707 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_register [2019-10-15 02:49:22,707 INFO L138 BoogieDeclarations]: Found implementation of procedure no_llseek [2019-10-15 02:49:22,707 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2019-10-15 02:49:22,707 INFO L138 BoogieDeclarations]: Found implementation of procedure register_reboot_notifier [2019-10-15 02:49:22,707 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_reboot_notifier [2019-10-15 02:49:22,708 INFO L138 BoogieDeclarations]: Found implementation of procedure external_alloc [2019-10-15 02:49:22,708 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2019-10-15 02:49:22,708 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2019-10-15 02:49:22,708 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2019-10-15 02:49:22,709 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 02:49:22,709 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2019-10-15 02:49:22,709 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2019-10-15 02:49:22,710 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2019-10-15 02:49:22,710 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2019-10-15 02:49:22,711 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_clear_bit [2019-10-15 02:49:22,711 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2019-10-15 02:49:22,711 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 02:49:22,712 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2019-10-15 02:49:22,712 INFO L130 BoogieDeclarations]: Found specification of procedure __might_fault [2019-10-15 02:49:22,712 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2019-10-15 02:49:22,712 INFO L130 BoogieDeclarations]: Found specification of procedure __request_region [2019-10-15 02:49:22,712 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2019-10-15 02:49:22,713 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2019-10-15 02:49:22,714 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2019-10-15 02:49:22,714 INFO L130 BoogieDeclarations]: Found specification of procedure ldv___module_get_5 [2019-10-15 02:49:22,714 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_get [2019-10-15 02:49:22,714 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 02:49:22,714 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-10-15 02:49:22,714 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 02:49:22,715 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2019-10-15 02:49:22,715 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_pointer [2019-10-15 02:49:22,715 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-15 02:49:22,715 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2019-10-15 02:49:22,715 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 02:49:22,715 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2019-10-15 02:49:22,716 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2019-10-15 02:49:22,716 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2019-10-15 02:49:22,716 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2019-10-15 02:49:22,716 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2019-10-15 02:49:22,716 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2019-10-15 02:49:22,717 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_ptr [2019-10-15 02:49:22,717 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_ulong [2019-10-15 02:49:22,717 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2019-10-15 02:49:22,717 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_file_operations_2 [2019-10-15 02:49:22,717 INFO L130 BoogieDeclarations]: Found specification of procedure no_llseek [2019-10-15 02:49:22,718 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_nonseekable_open_6 [2019-10-15 02:49:22,718 INFO L130 BoogieDeclarations]: Found specification of procedure misc_register [2019-10-15 02:49:22,718 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_misc_register_7 [2019-10-15 02:49:22,718 INFO L130 BoogieDeclarations]: Found specification of procedure misc_deregister [2019-10-15 02:49:22,718 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_misc_deregister_8 [2019-10-15 02:49:22,718 INFO L130 BoogieDeclarations]: Found specification of procedure register_reboot_notifier [2019-10-15 02:49:22,718 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_reboot_notifier [2019-10-15 02:49:22,719 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_to_user [2019-10-15 02:49:22,719 INFO L130 BoogieDeclarations]: Found specification of procedure __copy_to_user_overflow [2019-10-15 02:49:22,720 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2019-10-15 02:49:22,720 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 02:49:22,720 INFO L130 BoogieDeclarations]: Found specification of procedure superio_enter [2019-10-15 02:49:22,721 INFO L130 BoogieDeclarations]: Found specification of procedure superio_exit [2019-10-15 02:49:22,721 INFO L130 BoogieDeclarations]: Found specification of procedure superio_select [2019-10-15 02:49:22,721 INFO L130 BoogieDeclarations]: Found specification of procedure superio_inb [2019-10-15 02:49:22,722 INFO L130 BoogieDeclarations]: Found specification of procedure superio_outb [2019-10-15 02:49:22,722 INFO L130 BoogieDeclarations]: Found specification of procedure superio_inw [2019-10-15 02:49:22,722 INFO L130 BoogieDeclarations]: Found specification of procedure superio_outw [2019-10-15 02:49:22,723 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_update_timeout [2019-10-15 02:49:22,723 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_round_time [2019-10-15 02:49:22,723 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_keepalive [2019-10-15 02:49:22,723 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_start [2019-10-15 02:49:22,724 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_stop [2019-10-15 02:49:22,724 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_set_timeout [2019-10-15 02:49:22,725 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_get_status [2019-10-15 02:49:22,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 02:49:22,728 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_open [2019-10-15 02:49:22,728 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_release [2019-10-15 02:49:22,729 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_write [2019-10-15 02:49:22,729 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_ioctl [2019-10-15 02:49:22,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-15 02:49:22,730 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-15 02:49:22,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 02:49:22,730 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_notify_sys [2019-10-15 02:49:22,731 INFO L130 BoogieDeclarations]: Found specification of procedure it87_wdt_init [2019-10-15 02:49:22,738 INFO L130 BoogieDeclarations]: Found specification of procedure it87_wdt_exit [2019-10-15 02:49:22,739 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize [2019-10-15 02:49:22,739 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2019-10-15 02:49:22,739 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 02:49:22,739 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2019-10-15 02:49:22,740 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2019-10-15 02:49:22,740 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_err_ptr [2019-10-15 02:49:22,740 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_ptr_err [2019-10-15 02:49:22,740 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err_or_null [2019-10-15 02:49:22,740 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_try_module_get [2019-10-15 02:49:22,741 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put [2019-10-15 02:49:22,741 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put_and_exit [2019-10-15 02:49:22,741 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_refcount [2019-10-15 02:49:22,741 INFO L130 BoogieDeclarations]: Found specification of procedure external_alloc [2019-10-15 02:49:22,741 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2019-10-15 02:49:22,741 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-15 02:49:22,742 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2019-10-15 02:49:22,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 02:49:22,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-15 02:49:22,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2019-10-15 02:49:22,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-10-15 02:49:22,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 02:49:23,840 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2019-10-15 02:49:23,846 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_module_put_and_exitFINAL: assume true; [2019-10-15 02:49:26,555 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 02:49:26,555 INFO L284 CfgBuilder]: Removed 0 assume(true) statements. [2019-10-15 02:49:26,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 02:49:26 BoogieIcfgContainer [2019-10-15 02:49:26,557 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 02:49:26,559 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 02:49:26,559 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 02:49:26,562 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 02:49:26,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 02:49:20" (1/3) ... [2019-10-15 02:49:26,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a38c796 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 02:49:26, skipping insertion in model container [2019-10-15 02:49:26,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:49:22" (2/3) ... [2019-10-15 02:49:26,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a38c796 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 02:49:26, skipping insertion in model container [2019-10-15 02:49:26,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 02:49:26" (3/3) ... [2019-10-15 02:49:26,567 INFO L109 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i [2019-10-15 02:49:26,579 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 02:49:26,595 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 02:49:26,609 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 02:49:26,649 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 02:49:26,649 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 02:49:26,649 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 02:49:26,649 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 02:49:26,649 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 02:49:26,650 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 02:49:26,650 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 02:49:26,650 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 02:49:26,696 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states. [2019-10-15 02:49:26,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-10-15 02:49:26,729 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:49:26,731 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 02:49:26,734 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:49:26,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:49:26,741 INFO L82 PathProgramCache]: Analyzing trace with hash -2123511353, now seen corresponding path program 1 times [2019-10-15 02:49:26,751 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:49:26,751 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328420423] [2019-10-15 02:49:26,752 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:49:26,752 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:49:26,752 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:49:27,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:49:27,481 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2019-10-15 02:49:27,482 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328420423] [2019-10-15 02:49:27,483 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 02:49:27,483 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 02:49:27,483 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33318072] [2019-10-15 02:49:27,488 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 02:49:27,489 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 02:49:27,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 02:49:27,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 02:49:27,507 INFO L87 Difference]: Start difference. First operand 580 states. Second operand 3 states. [2019-10-15 02:49:27,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 02:49:27,660 INFO L93 Difference]: Finished difference Result 1107 states and 1613 transitions. [2019-10-15 02:49:27,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 02:49:27,662 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 126 [2019-10-15 02:49:27,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 02:49:27,705 INFO L225 Difference]: With dead ends: 1107 [2019-10-15 02:49:27,705 INFO L226 Difference]: Without dead ends: 1036 [2019-10-15 02:49:27,713 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 02:49:27,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2019-10-15 02:49:27,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 1032. [2019-10-15 02:49:27,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1032 states. [2019-10-15 02:49:27,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1498 transitions. [2019-10-15 02:49:27,921 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1498 transitions. Word has length 126 [2019-10-15 02:49:27,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 02:49:27,923 INFO L462 AbstractCegarLoop]: Abstraction has 1032 states and 1498 transitions. [2019-10-15 02:49:27,923 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 02:49:27,923 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1498 transitions. [2019-10-15 02:49:27,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2019-10-15 02:49:27,942 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:49:27,943 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 02:49:27,943 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:49:27,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:49:27,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1695427865, now seen corresponding path program 1 times [2019-10-15 02:49:27,944 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:49:27,944 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335374866] [2019-10-15 02:49:27,944 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:49:27,945 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:49:27,945 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:49:28,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:49:28,330 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-10-15 02:49:28,330 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335374866] [2019-10-15 02:49:28,330 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 02:49:28,331 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 02:49:28,331 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4351463] [2019-10-15 02:49:28,335 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 02:49:28,336 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 02:49:28,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 02:49:28,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 02:49:28,337 INFO L87 Difference]: Start difference. First operand 1032 states and 1498 transitions. Second operand 3 states. [2019-10-15 02:49:28,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 02:49:28,580 INFO L93 Difference]: Finished difference Result 2456 states and 3572 transitions. [2019-10-15 02:49:28,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 02:49:28,581 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 185 [2019-10-15 02:49:28,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 02:49:28,608 INFO L225 Difference]: With dead ends: 2456 [2019-10-15 02:49:28,610 INFO L226 Difference]: Without dead ends: 1459 [2019-10-15 02:49:28,622 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 02:49:28,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1459 states. [2019-10-15 02:49:28,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1459 to 1436. [2019-10-15 02:49:28,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1436 states. [2019-10-15 02:49:28,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 2092 transitions. [2019-10-15 02:49:28,756 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 2092 transitions. Word has length 185 [2019-10-15 02:49:28,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 02:49:28,756 INFO L462 AbstractCegarLoop]: Abstraction has 1436 states and 2092 transitions. [2019-10-15 02:49:28,757 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 02:49:28,757 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 2092 transitions. [2019-10-15 02:49:28,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2019-10-15 02:49:28,770 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:49:28,770 INFO L380 BasicCegarLoop]: trace histogram [13, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 02:49:28,770 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:49:28,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:49:28,771 INFO L82 PathProgramCache]: Analyzing trace with hash -356778446, now seen corresponding path program 1 times [2019-10-15 02:49:28,771 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:49:28,771 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78948849] [2019-10-15 02:49:28,772 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:49:28,772 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:49:28,772 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:49:28,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:49:29,257 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 449 trivial. 0 not checked. [2019-10-15 02:49:29,257 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78948849] [2019-10-15 02:49:29,258 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044426121] [2019-10-15 02:49:29,258 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 02:49:29,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:49:29,875 INFO L256 TraceCheckSpWp]: Trace formula consists of 2638 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 02:49:29,915 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 02:49:30,134 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 162 proven. 0 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2019-10-15 02:49:30,134 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 02:49:30,701 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 452 trivial. 0 not checked. [2019-10-15 02:49:30,702 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 02:49:30,702 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 4] total 7 [2019-10-15 02:49:30,702 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530130028] [2019-10-15 02:49:30,708 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 02:49:30,708 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 02:49:30,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 02:49:30,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-10-15 02:49:30,709 INFO L87 Difference]: Start difference. First operand 1436 states and 2092 transitions. Second operand 3 states. [2019-10-15 02:49:30,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 02:49:30,796 INFO L93 Difference]: Finished difference Result 2831 states and 4140 transitions. [2019-10-15 02:49:30,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 02:49:30,797 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 358 [2019-10-15 02:49:30,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 02:49:30,811 INFO L225 Difference]: With dead ends: 2831 [2019-10-15 02:49:30,811 INFO L226 Difference]: Without dead ends: 1436 [2019-10-15 02:49:30,819 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 720 GetRequests, 715 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-10-15 02:49:30,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1436 states. [2019-10-15 02:49:30,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1436 to 1436. [2019-10-15 02:49:30,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1436 states. [2019-10-15 02:49:30,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 2088 transitions. [2019-10-15 02:49:30,901 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 2088 transitions. Word has length 358 [2019-10-15 02:49:30,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 02:49:30,902 INFO L462 AbstractCegarLoop]: Abstraction has 1436 states and 2088 transitions. [2019-10-15 02:49:30,903 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 02:49:30,903 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 2088 transitions. [2019-10-15 02:49:30,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2019-10-15 02:49:30,912 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:49:30,913 INFO L380 BasicCegarLoop]: trace histogram [13, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 02:49:31,120 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 02:49:31,120 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:49:31,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:49:31,121 INFO L82 PathProgramCache]: Analyzing trace with hash -2013443434, now seen corresponding path program 1 times [2019-10-15 02:49:31,122 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:49:31,122 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973255692] [2019-10-15 02:49:31,122 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:49:31,122 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:49:31,123 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:49:31,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:49:31,554 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 451 trivial. 0 not checked. [2019-10-15 02:49:31,554 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973255692] [2019-10-15 02:49:31,554 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411603436] [2019-10-15 02:49:31,554 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 02:49:32,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:49:32,067 INFO L256 TraceCheckSpWp]: Trace formula consists of 2660 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-15 02:49:32,077 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 02:49:32,229 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-10-15 02:49:32,230 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 02:49:32,628 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2019-10-15 02:49:32,629 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 02:49:32,629 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [5] total 7 [2019-10-15 02:49:32,629 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714859612] [2019-10-15 02:49:32,631 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 02:49:32,631 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 02:49:32,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 02:49:32,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-10-15 02:49:32,632 INFO L87 Difference]: Start difference. First operand 1436 states and 2088 transitions. Second operand 4 states. [2019-10-15 02:49:33,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 02:49:33,691 INFO L93 Difference]: Finished difference Result 2831 states and 4129 transitions. [2019-10-15 02:49:33,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 02:49:33,692 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 363 [2019-10-15 02:49:33,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 02:49:33,702 INFO L225 Difference]: With dead ends: 2831 [2019-10-15 02:49:33,702 INFO L226 Difference]: Without dead ends: 1436 [2019-10-15 02:49:33,708 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 730 GetRequests, 722 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-10-15 02:49:33,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1436 states. [2019-10-15 02:49:33,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1436 to 1436. [2019-10-15 02:49:33,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1436 states. [2019-10-15 02:49:33,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 2086 transitions. [2019-10-15 02:49:33,780 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 2086 transitions. Word has length 363 [2019-10-15 02:49:33,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 02:49:33,782 INFO L462 AbstractCegarLoop]: Abstraction has 1436 states and 2086 transitions. [2019-10-15 02:49:33,782 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 02:49:33,782 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 2086 transitions. [2019-10-15 02:49:33,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2019-10-15 02:49:33,792 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:49:33,793 INFO L380 BasicCegarLoop]: trace histogram [13, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 02:49:34,000 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 02:49:34,001 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:49:34,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:49:34,001 INFO L82 PathProgramCache]: Analyzing trace with hash -118476032, now seen corresponding path program 1 times [2019-10-15 02:49:34,002 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:49:34,002 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19077835] [2019-10-15 02:49:34,002 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:49:34,002 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:49:34,002 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:49:34,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:49:34,384 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2019-10-15 02:49:34,385 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19077835] [2019-10-15 02:49:34,385 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623066031] [2019-10-15 02:49:34,385 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 02:49:35,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:49:35,101 INFO L256 TraceCheckSpWp]: Trace formula consists of 2683 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 02:49:35,117 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 02:49:35,329 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-10-15 02:49:35,330 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 02:49:35,842 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked. [2019-10-15 02:49:35,843 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 02:49:35,843 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5] total 9 [2019-10-15 02:49:35,843 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206817382] [2019-10-15 02:49:35,846 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 02:49:35,846 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 02:49:35,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 02:49:35,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-10-15 02:49:35,848 INFO L87 Difference]: Start difference. First operand 1436 states and 2086 transitions. Second operand 6 states. [2019-10-15 02:49:36,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 02:49:36,750 INFO L93 Difference]: Finished difference Result 2606 states and 3739 transitions. [2019-10-15 02:49:36,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 02:49:36,751 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 368 [2019-10-15 02:49:36,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 02:49:36,767 INFO L225 Difference]: With dead ends: 2606 [2019-10-15 02:49:36,767 INFO L226 Difference]: Without dead ends: 1115 [2019-10-15 02:49:36,777 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 740 GetRequests, 733 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-10-15 02:49:36,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2019-10-15 02:49:36,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 1115. [2019-10-15 02:49:36,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1115 states. [2019-10-15 02:49:36,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1115 states to 1115 states and 1555 transitions. [2019-10-15 02:49:36,872 INFO L78 Accepts]: Start accepts. Automaton has 1115 states and 1555 transitions. Word has length 368 [2019-10-15 02:49:36,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 02:49:36,874 INFO L462 AbstractCegarLoop]: Abstraction has 1115 states and 1555 transitions. [2019-10-15 02:49:36,874 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 02:49:36,874 INFO L276 IsEmpty]: Start isEmpty. Operand 1115 states and 1555 transitions. [2019-10-15 02:49:36,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2019-10-15 02:49:36,888 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:49:36,888 INFO L380 BasicCegarLoop]: trace histogram [13, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 02:49:37,098 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 02:49:37,099 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:49:37,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:49:37,099 INFO L82 PathProgramCache]: Analyzing trace with hash 603448734, now seen corresponding path program 1 times [2019-10-15 02:49:37,099 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:49:37,100 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327126703] [2019-10-15 02:49:37,100 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:49:37,100 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:49:37,100 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:49:37,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:49:37,949 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 460 trivial. 0 not checked. [2019-10-15 02:49:37,950 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327126703] [2019-10-15 02:49:37,950 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 02:49:37,950 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 02:49:37,950 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476604132] [2019-10-15 02:49:37,951 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 02:49:37,951 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 02:49:37,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 02:49:37,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-15 02:49:37,952 INFO L87 Difference]: Start difference. First operand 1115 states and 1555 transitions. Second operand 5 states. [2019-10-15 02:49:39,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 02:49:39,609 INFO L93 Difference]: Finished difference Result 2163 states and 3037 transitions. [2019-10-15 02:49:39,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 02:49:39,610 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 386 [2019-10-15 02:49:39,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 02:49:39,620 INFO L225 Difference]: With dead ends: 2163 [2019-10-15 02:49:39,621 INFO L226 Difference]: Without dead ends: 1193 [2019-10-15 02:49:39,626 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 02:49:39,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1193 states. [2019-10-15 02:49:39,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1193 to 1174. [2019-10-15 02:49:39,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1174 states. [2019-10-15 02:49:39,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 1653 transitions. [2019-10-15 02:49:39,707 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 1653 transitions. Word has length 386 [2019-10-15 02:49:39,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 02:49:39,709 INFO L462 AbstractCegarLoop]: Abstraction has 1174 states and 1653 transitions. [2019-10-15 02:49:39,709 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 02:49:39,709 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 1653 transitions. [2019-10-15 02:49:39,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2019-10-15 02:49:39,728 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:49:39,729 INFO L380 BasicCegarLoop]: trace histogram [13, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 02:49:39,729 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:49:39,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:49:39,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1872226297, now seen corresponding path program 1 times [2019-10-15 02:49:39,730 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:49:39,734 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483465724] [2019-10-15 02:49:39,735 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:49:39,735 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:49:39,735 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:49:39,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:49:40,100 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 460 trivial. 0 not checked. [2019-10-15 02:49:40,102 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483465724] [2019-10-15 02:49:40,102 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 02:49:40,102 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 02:49:40,103 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735167688] [2019-10-15 02:49:40,104 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 02:49:40,104 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 02:49:40,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 02:49:40,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 02:49:40,105 INFO L87 Difference]: Start difference. First operand 1174 states and 1653 transitions. Second operand 5 states. [2019-10-15 02:49:40,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 02:49:40,195 INFO L93 Difference]: Finished difference Result 2012 states and 2840 transitions. [2019-10-15 02:49:40,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 02:49:40,195 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 389 [2019-10-15 02:49:40,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 02:49:40,206 INFO L225 Difference]: With dead ends: 2012 [2019-10-15 02:49:40,206 INFO L226 Difference]: Without dead ends: 1186 [2019-10-15 02:49:40,211 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 02:49:40,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2019-10-15 02:49:40,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 1182. [2019-10-15 02:49:40,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1182 states. [2019-10-15 02:49:40,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 1663 transitions. [2019-10-15 02:49:40,281 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 1663 transitions. Word has length 389 [2019-10-15 02:49:40,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 02:49:40,282 INFO L462 AbstractCegarLoop]: Abstraction has 1182 states and 1663 transitions. [2019-10-15 02:49:40,282 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 02:49:40,282 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 1663 transitions. [2019-10-15 02:49:40,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2019-10-15 02:49:40,293 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:49:40,294 INFO L380 BasicCegarLoop]: trace histogram [13, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 02:49:40,294 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:49:40,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:49:40,295 INFO L82 PathProgramCache]: Analyzing trace with hash 719521026, now seen corresponding path program 1 times [2019-10-15 02:49:40,295 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:49:40,295 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417094287] [2019-10-15 02:49:40,295 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:49:40,295 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:49:40,296 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:49:40,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:49:40,696 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked. [2019-10-15 02:49:40,696 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417094287] [2019-10-15 02:49:40,697 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963141449] [2019-10-15 02:49:40,697 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 02:49:41,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:49:41,288 INFO L256 TraceCheckSpWp]: Trace formula consists of 2747 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 02:49:41,303 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 02:49:41,415 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2019-10-15 02:49:41,415 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 02:49:42,026 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 460 trivial. 0 not checked. [2019-10-15 02:49:42,027 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 02:49:42,027 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 10 [2019-10-15 02:49:42,027 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132172461] [2019-10-15 02:49:42,028 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 02:49:42,029 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 02:49:42,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 02:49:42,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-10-15 02:49:42,029 INFO L87 Difference]: Start difference. First operand 1182 states and 1663 transitions. Second operand 5 states. [2019-10-15 02:49:42,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 02:49:42,108 INFO L93 Difference]: Finished difference Result 2287 states and 3232 transitions. [2019-10-15 02:49:42,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 02:49:42,108 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 395 [2019-10-15 02:49:42,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 02:49:42,116 INFO L225 Difference]: With dead ends: 2287 [2019-10-15 02:49:42,117 INFO L226 Difference]: Without dead ends: 1190 [2019-10-15 02:49:42,121 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 797 GetRequests, 789 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-10-15 02:49:42,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2019-10-15 02:49:42,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 1184. [2019-10-15 02:49:42,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1184 states. [2019-10-15 02:49:42,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 1667 transitions. [2019-10-15 02:49:42,184 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 1667 transitions. Word has length 395 [2019-10-15 02:49:42,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 02:49:42,185 INFO L462 AbstractCegarLoop]: Abstraction has 1184 states and 1667 transitions. [2019-10-15 02:49:42,185 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 02:49:42,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 1667 transitions. [2019-10-15 02:49:42,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2019-10-15 02:49:42,192 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:49:42,193 INFO L380 BasicCegarLoop]: trace histogram [17, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 02:49:42,400 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 02:49:42,401 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:49:42,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:49:42,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1401591383, now seen corresponding path program 1 times [2019-10-15 02:49:42,402 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:49:42,402 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246877317] [2019-10-15 02:49:42,403 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:49:42,403 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:49:42,403 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:49:42,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:49:42,799 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2019-10-15 02:49:42,799 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246877317] [2019-10-15 02:49:42,800 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367046267] [2019-10-15 02:49:42,800 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 02:49:43,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:49:43,458 INFO L256 TraceCheckSpWp]: Trace formula consists of 2790 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 02:49:43,467 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 02:49:43,556 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 259 proven. 0 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2019-10-15 02:49:43,556 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 02:49:44,187 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2019-10-15 02:49:44,189 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 02:49:44,190 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2019-10-15 02:49:44,190 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23951603] [2019-10-15 02:49:44,191 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 02:49:44,191 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 02:49:44,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 02:49:44,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-15 02:49:44,192 INFO L87 Difference]: Start difference. First operand 1184 states and 1667 transitions. Second operand 5 states. [2019-10-15 02:49:44,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 02:49:44,305 INFO L93 Difference]: Finished difference Result 2252 states and 3181 transitions. [2019-10-15 02:49:44,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 02:49:44,306 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 408 [2019-10-15 02:49:44,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 02:49:44,315 INFO L225 Difference]: With dead ends: 2252 [2019-10-15 02:49:44,315 INFO L226 Difference]: Without dead ends: 1190 [2019-10-15 02:49:44,321 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 820 GetRequests, 814 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-15 02:49:44,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2019-10-15 02:49:44,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 1184. [2019-10-15 02:49:44,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1184 states. [2019-10-15 02:49:44,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 1665 transitions. [2019-10-15 02:49:44,395 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 1665 transitions. Word has length 408 [2019-10-15 02:49:44,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 02:49:44,396 INFO L462 AbstractCegarLoop]: Abstraction has 1184 states and 1665 transitions. [2019-10-15 02:49:44,396 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 02:49:44,396 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 1665 transitions. [2019-10-15 02:49:44,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2019-10-15 02:49:44,405 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:49:44,406 INFO L380 BasicCegarLoop]: trace histogram [21, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 02:49:44,615 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 02:49:44,616 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:49:44,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:49:44,616 INFO L82 PathProgramCache]: Analyzing trace with hash -558461706, now seen corresponding path program 2 times [2019-10-15 02:49:44,616 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:49:44,617 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579878516] [2019-10-15 02:49:44,617 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:49:44,617 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:49:44,617 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:49:45,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:49:45,352 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 718 trivial. 0 not checked. [2019-10-15 02:49:45,353 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579878516] [2019-10-15 02:49:45,353 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448737512] [2019-10-15 02:49:45,353 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 02:49:53,520 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-15 02:49:53,520 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 02:49:53,548 INFO L256 TraceCheckSpWp]: Trace formula consists of 2139 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 02:49:53,557 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 02:49:53,583 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 02:49:53,679 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 670 trivial. 0 not checked. [2019-10-15 02:49:53,679 INFO L321 TraceCheckSpWp]: Computing backward predicates...