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 0.1.24-36ac518-m [2019-10-07 11:17:24,297 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-07 11:17:24,298 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-07 11:17:24,311 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-07 11:17:24,311 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-07 11:17:24,312 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-07 11:17:24,314 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-07 11:17:24,315 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-07 11:17:24,317 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-07 11:17:24,318 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-07 11:17:24,319 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-07 11:17:24,320 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-07 11:17:24,320 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-07 11:17:24,321 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-07 11:17:24,322 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-07 11:17:24,323 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-07 11:17:24,324 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-07 11:17:24,325 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-07 11:17:24,327 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-07 11:17:24,329 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-07 11:17:24,331 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-07 11:17:24,332 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-07 11:17:24,333 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-07 11:17:24,334 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-07 11:17:24,336 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-07 11:17:24,336 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-07 11:17:24,337 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-07 11:17:24,337 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-07 11:17:24,338 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-07 11:17:24,339 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-07 11:17:24,339 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-07 11:17:24,340 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-07 11:17:24,341 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-07 11:17:24,341 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-07 11:17:24,342 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-07 11:17:24,343 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-07 11:17:24,343 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-07 11:17:24,343 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-07 11:17:24,344 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-07 11:17:24,344 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-07 11:17:24,345 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-07 11:17:24,346 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 [2019-10-07 11:17:24,360 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-07 11:17:24,361 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-07 11:17:24,362 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-07 11:17:24,362 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-07 11:17:24,362 INFO L138 SettingsManager]: * Use SBE=true [2019-10-07 11:17:24,362 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-07 11:17:24,363 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-07 11:17:24,363 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-07 11:17:24,363 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-07 11:17:24,363 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-07 11:17:24,363 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-07 11:17:24,364 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-07 11:17:24,364 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-07 11:17:24,364 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-07 11:17:24,364 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-07 11:17:24,364 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-07 11:17:24,365 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-07 11:17:24,365 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-07 11:17:24,365 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-07 11:17:24,365 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-07 11:17:24,365 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-07 11:17:24,366 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 11:17:24,366 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-07 11:17:24,366 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-07 11:17:24,366 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-07 11:17:24,366 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-07 11:17:24,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-07 11:17:24,367 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-07 11:17:24,367 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 [2019-10-07 11:17:24,631 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-07 11:17:24,644 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-07 11:17:24,648 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-07 11:17:24,649 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-07 11:17:24,650 INFO L275 PluginConnector]: CDTParser initialized [2019-10-07 11:17:24,650 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i [2019-10-07 11:17:24,729 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87bc01e6c/d93d64df2d8e4cff8a9cc774c1eabc0b/FLAG7c4931067 [2019-10-07 11:17:25,491 INFO L306 CDTParser]: Found 1 translation units. [2019-10-07 11:17:25,493 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i [2019-10-07 11:17:25,528 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87bc01e6c/d93d64df2d8e4cff8a9cc774c1eabc0b/FLAG7c4931067 [2019-10-07 11:17:26,030 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87bc01e6c/d93d64df2d8e4cff8a9cc774c1eabc0b [2019-10-07 11:17:26,040 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-07 11:17:26,041 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-07 11:17:26,042 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-07 11:17:26,043 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-07 11:17:26,046 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-07 11:17:26,047 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 11:17:26" (1/1) ... [2019-10-07 11:17:26,050 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fb55534 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 11:17:26, skipping insertion in model container [2019-10-07 11:17:26,050 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 11:17:26" (1/1) ... [2019-10-07 11:17:26,055 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-07 11:17:26,140 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-07 11:17:27,267 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 11:17:27,306 INFO L188 MainTranslator]: Completed pre-run [2019-10-07 11:17:27,500 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 11:17:27,596 INFO L192 MainTranslator]: Completed translation [2019-10-07 11:17:27,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 11:17:27 WrapperNode [2019-10-07 11:17:27,597 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-07 11:17:27,598 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-07 11:17:27,598 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-07 11:17:27,599 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-07 11:17:27,614 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 11:17:27" (1/1) ... [2019-10-07 11:17:27,614 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 11:17:27" (1/1) ... [2019-10-07 11:17:27,647 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 11:17:27" (1/1) ... [2019-10-07 11:17:27,648 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 11:17:27" (1/1) ... [2019-10-07 11:17:27,710 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 11:17:27" (1/1) ... [2019-10-07 11:17:27,738 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 11:17:27" (1/1) ... [2019-10-07 11:17:27,752 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 11:17:27" (1/1) ... [2019-10-07 11:17:27,784 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-07 11:17:27,785 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-07 11:17:27,785 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-07 11:17:27,787 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-07 11:17:27,789 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 11:17:27" (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 [2019-10-07 11:17:27,895 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-07 11:17:27,895 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-07 11:17:27,895 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2019-10-07 11:17:27,896 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2019-10-07 11:17:27,896 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2019-10-07 11:17:27,897 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_clear_bit [2019-10-07 11:17:27,898 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2019-10-07 11:17:27,899 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2019-10-07 11:17:27,899 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2019-10-07 11:17:27,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2019-10-07 11:17:27,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2019-10-07 11:17:27,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2019-10-07 11:17:27,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2019-10-07 11:17:27,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2019-10-07 11:17:27,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_ptr [2019-10-07 11:17:27,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_ulong [2019-10-07 11:17:27,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2019-10-07 11:17:27,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2019-10-07 11:17:27,904 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2019-10-07 11:17:27,905 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_enter [2019-10-07 11:17:27,905 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_exit [2019-10-07 11:17:27,905 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_select [2019-10-07 11:17:27,905 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_inb [2019-10-07 11:17:27,905 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_outb [2019-10-07 11:17:27,906 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_inw [2019-10-07 11:17:27,906 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_outw [2019-10-07 11:17:27,906 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_update_timeout [2019-10-07 11:17:27,906 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_round_time [2019-10-07 11:17:27,906 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_keepalive [2019-10-07 11:17:27,907 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_start [2019-10-07 11:17:27,907 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_stop [2019-10-07 11:17:27,907 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_set_timeout [2019-10-07 11:17:27,907 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_get_status [2019-10-07 11:17:27,907 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_open [2019-10-07 11:17:27,907 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_release [2019-10-07 11:17:27,908 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_write [2019-10-07 11:17:27,908 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_ioctl [2019-10-07 11:17:27,908 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_notify_sys [2019-10-07 11:17:27,908 INFO L138 BoogieDeclarations]: Found implementation of procedure it87_wdt_init [2019-10-07 11:17:27,908 INFO L138 BoogieDeclarations]: Found implementation of procedure it87_wdt_exit [2019-10-07 11:17:27,908 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_file_operations_2 [2019-10-07 11:17:27,909 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-07 11:17:27,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv___module_get_5 [2019-10-07 11:17:27,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_nonseekable_open_6 [2019-10-07 11:17:27,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_misc_register_7 [2019-10-07 11:17:27,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_misc_deregister_8 [2019-10-07 11:17:27,910 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2019-10-07 11:17:27,910 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2019-10-07 11:17:27,910 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_err_ptr [2019-10-07 11:17:27,910 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_ptr_err [2019-10-07 11:17:27,910 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err_or_null [2019-10-07 11:17:27,910 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_get [2019-10-07 11:17:27,910 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_try_module_get [2019-10-07 11:17:27,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put [2019-10-07 11:17:27,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put_and_exit [2019-10-07 11:17:27,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_refcount [2019-10-07 11:17:27,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2019-10-07 11:17:27,911 INFO L138 BoogieDeclarations]: Found implementation of procedure __copy_to_user_overflow [2019-10-07 11:17:27,912 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_fault [2019-10-07 11:17:27,913 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2019-10-07 11:17:27,913 INFO L138 BoogieDeclarations]: Found implementation of procedure __request_region [2019-10-07 11:17:27,914 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_to_user [2019-10-07 11:17:27,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize [2019-10-07 11:17:27,914 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_deregister [2019-10-07 11:17:27,915 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_register [2019-10-07 11:17:27,915 INFO L138 BoogieDeclarations]: Found implementation of procedure no_llseek [2019-10-07 11:17:27,915 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2019-10-07 11:17:27,916 INFO L138 BoogieDeclarations]: Found implementation of procedure register_reboot_notifier [2019-10-07 11:17:27,916 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_reboot_notifier [2019-10-07 11:17:27,916 INFO L138 BoogieDeclarations]: Found implementation of procedure external_alloc [2019-10-07 11:17:27,916 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2019-10-07 11:17:27,917 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2019-10-07 11:17:27,917 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2019-10-07 11:17:27,918 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-07 11:17:27,918 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2019-10-07 11:17:27,919 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2019-10-07 11:17:27,920 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2019-10-07 11:17:27,920 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2019-10-07 11:17:27,920 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_clear_bit [2019-10-07 11:17:27,921 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2019-10-07 11:17:27,921 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-07 11:17:27,922 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2019-10-07 11:17:27,922 INFO L130 BoogieDeclarations]: Found specification of procedure __might_fault [2019-10-07 11:17:27,922 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2019-10-07 11:17:27,923 INFO L130 BoogieDeclarations]: Found specification of procedure __request_region [2019-10-07 11:17:27,923 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2019-10-07 11:17:27,923 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2019-10-07 11:17:27,924 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2019-10-07 11:17:27,924 INFO L130 BoogieDeclarations]: Found specification of procedure ldv___module_get_5 [2019-10-07 11:17:27,925 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_get [2019-10-07 11:17:27,925 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-07 11:17:27,925 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-10-07 11:17:27,925 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-07 11:17:27,925 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2019-10-07 11:17:27,926 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_pointer [2019-10-07 11:17:27,926 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-07 11:17:27,926 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2019-10-07 11:17:27,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-07 11:17:27,927 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2019-10-07 11:17:27,927 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2019-10-07 11:17:27,927 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2019-10-07 11:17:27,928 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2019-10-07 11:17:27,928 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2019-10-07 11:17:27,928 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2019-10-07 11:17:27,928 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_ptr [2019-10-07 11:17:27,929 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_ulong [2019-10-07 11:17:27,929 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2019-10-07 11:17:27,929 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_file_operations_2 [2019-10-07 11:17:27,929 INFO L130 BoogieDeclarations]: Found specification of procedure no_llseek [2019-10-07 11:17:27,930 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_nonseekable_open_6 [2019-10-07 11:17:27,930 INFO L130 BoogieDeclarations]: Found specification of procedure misc_register [2019-10-07 11:17:27,930 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_misc_register_7 [2019-10-07 11:17:27,931 INFO L130 BoogieDeclarations]: Found specification of procedure misc_deregister [2019-10-07 11:17:27,931 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_misc_deregister_8 [2019-10-07 11:17:27,931 INFO L130 BoogieDeclarations]: Found specification of procedure register_reboot_notifier [2019-10-07 11:17:27,931 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_reboot_notifier [2019-10-07 11:17:27,932 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_to_user [2019-10-07 11:17:27,933 INFO L130 BoogieDeclarations]: Found specification of procedure __copy_to_user_overflow [2019-10-07 11:17:27,933 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2019-10-07 11:17:27,933 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-07 11:17:27,934 INFO L130 BoogieDeclarations]: Found specification of procedure superio_enter [2019-10-07 11:17:27,934 INFO L130 BoogieDeclarations]: Found specification of procedure superio_exit [2019-10-07 11:17:27,934 INFO L130 BoogieDeclarations]: Found specification of procedure superio_select [2019-10-07 11:17:27,935 INFO L130 BoogieDeclarations]: Found specification of procedure superio_inb [2019-10-07 11:17:27,936 INFO L130 BoogieDeclarations]: Found specification of procedure superio_outb [2019-10-07 11:17:27,936 INFO L130 BoogieDeclarations]: Found specification of procedure superio_inw [2019-10-07 11:17:27,937 INFO L130 BoogieDeclarations]: Found specification of procedure superio_outw [2019-10-07 11:17:27,937 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_update_timeout [2019-10-07 11:17:27,937 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_round_time [2019-10-07 11:17:27,937 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_keepalive [2019-10-07 11:17:27,938 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_start [2019-10-07 11:17:27,938 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_stop [2019-10-07 11:17:27,939 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_set_timeout [2019-10-07 11:17:27,940 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_get_status [2019-10-07 11:17:27,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-07 11:17:27,945 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_open [2019-10-07 11:17:27,950 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_release [2019-10-07 11:17:27,950 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_write [2019-10-07 11:17:27,951 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_ioctl [2019-10-07 11:17:27,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-07 11:17:27,952 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-07 11:17:27,952 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-07 11:17:27,952 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_notify_sys [2019-10-07 11:17:27,953 INFO L130 BoogieDeclarations]: Found specification of procedure it87_wdt_init [2019-10-07 11:17:27,958 INFO L130 BoogieDeclarations]: Found specification of procedure it87_wdt_exit [2019-10-07 11:17:27,959 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize [2019-10-07 11:17:27,959 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2019-10-07 11:17:27,959 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-07 11:17:27,959 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2019-10-07 11:17:27,960 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2019-10-07 11:17:27,960 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_err_ptr [2019-10-07 11:17:27,960 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_ptr_err [2019-10-07 11:17:27,960 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err_or_null [2019-10-07 11:17:27,961 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_try_module_get [2019-10-07 11:17:27,961 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put [2019-10-07 11:17:27,965 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put_and_exit [2019-10-07 11:17:27,966 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_refcount [2019-10-07 11:17:27,966 INFO L130 BoogieDeclarations]: Found specification of procedure external_alloc [2019-10-07 11:17:27,966 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2019-10-07 11:17:27,966 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-07 11:17:27,966 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2019-10-07 11:17:27,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-07 11:17:27,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-07 11:17:27,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2019-10-07 11:17:27,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-10-07 11:17:27,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-07 11:17:29,338 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2019-10-07 11:17:29,347 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_module_put_and_exitFINAL: assume true; [2019-10-07 11:17:32,102 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-07 11:17:32,102 INFO L284 CfgBuilder]: Removed 0 assume(true) statements. [2019-10-07 11:17:32,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 11:17:32 BoogieIcfgContainer [2019-10-07 11:17:32,104 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-07 11:17:32,106 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-07 11:17:32,106 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-07 11:17:32,109 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-07 11:17:32,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 11:17:26" (1/3) ... [2019-10-07 11:17:32,111 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e598cce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 11:17:32, skipping insertion in model container [2019-10-07 11:17:32,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 11:17:27" (2/3) ... [2019-10-07 11:17:32,112 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e598cce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 11:17:32, skipping insertion in model container [2019-10-07 11:17:32,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 11:17:32" (3/3) ... [2019-10-07 11:17:32,114 INFO L109 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i [2019-10-07 11:17:32,124 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-07 11:17:32,137 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-07 11:17:32,150 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-07 11:17:32,189 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-07 11:17:32,190 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-07 11:17:32,190 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-07 11:17:32,190 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-07 11:17:32,191 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-07 11:17:32,191 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-07 11:17:32,191 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-07 11:17:32,191 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-07 11:17:32,234 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states. [2019-10-07 11:17:32,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-10-07 11:17:32,267 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 11:17:32,269 INFO L385 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] [2019-10-07 11:17:32,272 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 11:17:32,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 11:17:32,278 INFO L82 PathProgramCache]: Analyzing trace with hash -2123511353, now seen corresponding path program 1 times [2019-10-07 11:17:32,288 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 11:17:32,288 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 11:17:32,288 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 11:17:32,289 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 11:17:32,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 11:17:32,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 11:17:33,014 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2019-10-07 11:17:33,015 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 11:17:33,016 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 11:17:33,016 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-07 11:17:33,021 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 11:17:33,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 11:17:33,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 11:17:33,038 INFO L87 Difference]: Start difference. First operand 580 states. Second operand 3 states. [2019-10-07 11:17:33,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 11:17:33,255 INFO L93 Difference]: Finished difference Result 1107 states and 1613 transitions. [2019-10-07 11:17:33,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 11:17:33,258 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 126 [2019-10-07 11:17:33,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 11:17:33,287 INFO L225 Difference]: With dead ends: 1107 [2019-10-07 11:17:33,287 INFO L226 Difference]: Without dead ends: 1036 [2019-10-07 11:17:33,293 INFO L606 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 [2019-10-07 11:17:33,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2019-10-07 11:17:33,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 1032. [2019-10-07 11:17:33,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1032 states. [2019-10-07 11:17:33,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1498 transitions. [2019-10-07 11:17:33,515 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1498 transitions. Word has length 126 [2019-10-07 11:17:33,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 11:17:33,516 INFO L462 AbstractCegarLoop]: Abstraction has 1032 states and 1498 transitions. [2019-10-07 11:17:33,516 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 11:17:33,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1498 transitions. [2019-10-07 11:17:33,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2019-10-07 11:17:33,525 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 11:17:33,525 INFO L385 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] [2019-10-07 11:17:33,526 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 11:17:33,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 11:17:33,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1695427865, now seen corresponding path program 1 times [2019-10-07 11:17:33,526 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 11:17:33,526 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 11:17:33,527 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 11:17:33,527 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 11:17:33,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 11:17:33,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 11:17:33,764 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-10-07 11:17:33,764 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 11:17:33,765 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 11:17:33,765 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-07 11:17:33,769 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 11:17:33,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 11:17:33,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 11:17:33,770 INFO L87 Difference]: Start difference. First operand 1032 states and 1498 transitions. Second operand 3 states. [2019-10-07 11:17:34,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 11:17:34,085 INFO L93 Difference]: Finished difference Result 2456 states and 3572 transitions. [2019-10-07 11:17:34,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 11:17:34,085 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 185 [2019-10-07 11:17:34,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 11:17:34,105 INFO L225 Difference]: With dead ends: 2456 [2019-10-07 11:17:34,105 INFO L226 Difference]: Without dead ends: 1459 [2019-10-07 11:17:34,117 INFO L606 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 [2019-10-07 11:17:34,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1459 states. [2019-10-07 11:17:34,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1459 to 1436. [2019-10-07 11:17:34,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1436 states. [2019-10-07 11:17:34,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 2092 transitions. [2019-10-07 11:17:34,219 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 2092 transitions. Word has length 185 [2019-10-07 11:17:34,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 11:17:34,219 INFO L462 AbstractCegarLoop]: Abstraction has 1436 states and 2092 transitions. [2019-10-07 11:17:34,220 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 11:17:34,220 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 2092 transitions. [2019-10-07 11:17:34,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2019-10-07 11:17:34,229 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 11:17:34,229 INFO L385 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] [2019-10-07 11:17:34,230 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 11:17:34,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 11:17:34,230 INFO L82 PathProgramCache]: Analyzing trace with hash -356778446, now seen corresponding path program 1 times [2019-10-07 11:17:34,230 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 11:17:34,230 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 11:17:34,231 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 11:17:34,231 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 11:17:34,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 11:17:34,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 11:17:34,816 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 449 trivial. 0 not checked. [2019-10-07 11:17:34,816 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 11:17:34,816 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 11:17:34,817 INFO L95 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 [2019-10-07 11:17:35,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 11:17:35,556 INFO L256 TraceCheckSpWp]: Trace formula consists of 2638 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-07 11:17:35,580 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 11:17:35,806 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 162 proven. 0 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2019-10-07 11:17:35,807 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 11:17:36,454 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2019-10-07 11:17:36,576 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 452 trivial. 0 not checked. [2019-10-07 11:17:36,577 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 11:17:36,577 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 4] total 7 [2019-10-07 11:17:36,579 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 11:17:36,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 11:17:36,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-10-07 11:17:36,580 INFO L87 Difference]: Start difference. First operand 1436 states and 2092 transitions. Second operand 3 states. [2019-10-07 11:17:36,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 11:17:36,664 INFO L93 Difference]: Finished difference Result 2831 states and 4140 transitions. [2019-10-07 11:17:36,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 11:17:36,665 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 358 [2019-10-07 11:17:36,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 11:17:36,680 INFO L225 Difference]: With dead ends: 2831 [2019-10-07 11:17:36,681 INFO L226 Difference]: Without dead ends: 1436 [2019-10-07 11:17:36,689 INFO L606 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 [2019-10-07 11:17:36,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1436 states. [2019-10-07 11:17:36,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1436 to 1436. [2019-10-07 11:17:36,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1436 states. [2019-10-07 11:17:36,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 2088 transitions. [2019-10-07 11:17:36,784 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 2088 transitions. Word has length 358 [2019-10-07 11:17:36,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 11:17:36,785 INFO L462 AbstractCegarLoop]: Abstraction has 1436 states and 2088 transitions. [2019-10-07 11:17:36,785 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 11:17:36,785 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 2088 transitions. [2019-10-07 11:17:36,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2019-10-07 11:17:36,801 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 11:17:36,802 INFO L385 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] [2019-10-07 11:17:37,011 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 11:17:37,012 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 11:17:37,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 11:17:37,012 INFO L82 PathProgramCache]: Analyzing trace with hash -2013443434, now seen corresponding path program 1 times [2019-10-07 11:17:37,013 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 11:17:37,013 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 11:17:37,013 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 11:17:37,014 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 11:17:37,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 11:17:37,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 11:17:37,526 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 451 trivial. 0 not checked. [2019-10-07 11:17:37,526 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 11:17:37,526 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 11:17:37,527 INFO L95 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 [2019-10-07 11:17:38,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 11:17:38,326 INFO L256 TraceCheckSpWp]: Trace formula consists of 2660 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-07 11:17:38,339 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 11:17:38,502 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-10-07 11:17:38,503 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 11:17:39,038 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2019-10-07 11:17:39,039 INFO L211 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-07 11:17:39,039 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [5] total 7 [2019-10-07 11:17:39,041 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 11:17:39,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 11:17:39,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-10-07 11:17:39,042 INFO L87 Difference]: Start difference. First operand 1436 states and 2088 transitions. Second operand 4 states. [2019-10-07 11:17:40,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 11:17:40,331 INFO L93 Difference]: Finished difference Result 2831 states and 4129 transitions. [2019-10-07 11:17:40,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 11:17:40,332 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 363 [2019-10-07 11:17:40,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 11:17:40,342 INFO L225 Difference]: With dead ends: 2831 [2019-10-07 11:17:40,342 INFO L226 Difference]: Without dead ends: 1436 [2019-10-07 11:17:40,350 INFO L606 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 [2019-10-07 11:17:40,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1436 states. [2019-10-07 11:17:40,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1436 to 1436. [2019-10-07 11:17:40,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1436 states. [2019-10-07 11:17:40,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 2086 transitions. [2019-10-07 11:17:40,434 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 2086 transitions. Word has length 363 [2019-10-07 11:17:40,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 11:17:40,435 INFO L462 AbstractCegarLoop]: Abstraction has 1436 states and 2086 transitions. [2019-10-07 11:17:40,436 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 11:17:40,436 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 2086 transitions. [2019-10-07 11:17:40,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2019-10-07 11:17:40,445 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 11:17:40,446 INFO L385 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] [2019-10-07 11:17:40,654 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 11:17:40,654 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 11:17:40,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 11:17:40,655 INFO L82 PathProgramCache]: Analyzing trace with hash -118476032, now seen corresponding path program 1 times [2019-10-07 11:17:40,655 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 11:17:40,655 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 11:17:40,655 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 11:17:40,655 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 11:17:40,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 11:17:40,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 11:17:41,066 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2019-10-07 11:17:41,067 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 11:17:41,067 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 11:17:41,067 INFO L95 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 [2019-10-07 11:17:41,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 11:17:41,881 INFO L256 TraceCheckSpWp]: Trace formula consists of 2683 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-07 11:17:41,893 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 11:17:42,039 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-10-07 11:17:42,040 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 11:17:42,622 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked. [2019-10-07 11:17:42,623 INFO L211 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-07 11:17:42,623 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5] total 9 [2019-10-07 11:17:42,625 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-07 11:17:42,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-07 11:17:42,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-10-07 11:17:42,626 INFO L87 Difference]: Start difference. First operand 1436 states and 2086 transitions. Second operand 6 states. [2019-10-07 11:17:43,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 11:17:43,264 INFO L93 Difference]: Finished difference Result 2606 states and 3739 transitions. [2019-10-07 11:17:43,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-07 11:17:43,265 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 368 [2019-10-07 11:17:43,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 11:17:43,274 INFO L225 Difference]: With dead ends: 2606 [2019-10-07 11:17:43,274 INFO L226 Difference]: Without dead ends: 1115 [2019-10-07 11:17:43,282 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 740 GetRequests, 733 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-10-07 11:17:43,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2019-10-07 11:17:43,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 1115. [2019-10-07 11:17:43,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1115 states. [2019-10-07 11:17:43,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1115 states to 1115 states and 1555 transitions. [2019-10-07 11:17:43,377 INFO L78 Accepts]: Start accepts. Automaton has 1115 states and 1555 transitions. Word has length 368 [2019-10-07 11:17:43,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 11:17:43,379 INFO L462 AbstractCegarLoop]: Abstraction has 1115 states and 1555 transitions. [2019-10-07 11:17:43,379 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-07 11:17:43,379 INFO L276 IsEmpty]: Start isEmpty. Operand 1115 states and 1555 transitions. [2019-10-07 11:17:43,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2019-10-07 11:17:43,393 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 11:17:43,393 INFO L385 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] [2019-10-07 11:17:43,601 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 11:17:43,602 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 11:17:43,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 11:17:43,603 INFO L82 PathProgramCache]: Analyzing trace with hash 603448734, now seen corresponding path program 1 times [2019-10-07 11:17:43,603 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 11:17:43,603 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 11:17:43,603 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 11:17:43,603 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 11:17:43,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 11:17:44,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 11:17:44,514 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 460 trivial. 0 not checked. [2019-10-07 11:17:44,514 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 11:17:44,514 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 11:17:44,515 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-07 11:17:44,517 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 11:17:44,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 11:17:44,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-07 11:17:44,518 INFO L87 Difference]: Start difference. First operand 1115 states and 1555 transitions. Second operand 5 states. [2019-10-07 11:17:46,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 11:17:46,378 INFO L93 Difference]: Finished difference Result 2163 states and 3037 transitions. [2019-10-07 11:17:46,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 11:17:46,380 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 386 [2019-10-07 11:17:46,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 11:17:46,388 INFO L225 Difference]: With dead ends: 2163 [2019-10-07 11:17:46,388 INFO L226 Difference]: Without dead ends: 1193 [2019-10-07 11:17:46,393 INFO L606 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 [2019-10-07 11:17:46,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1193 states. [2019-10-07 11:17:46,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1193 to 1174. [2019-10-07 11:17:46,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1174 states. [2019-10-07 11:17:46,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 1653 transitions. [2019-10-07 11:17:46,449 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 1653 transitions. Word has length 386 [2019-10-07 11:17:46,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 11:17:46,450 INFO L462 AbstractCegarLoop]: Abstraction has 1174 states and 1653 transitions. [2019-10-07 11:17:46,450 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 11:17:46,450 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 1653 transitions. [2019-10-07 11:17:46,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2019-10-07 11:17:46,461 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 11:17:46,461 INFO L385 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] [2019-10-07 11:17:46,461 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 11:17:46,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 11:17:46,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1872226297, now seen corresponding path program 1 times [2019-10-07 11:17:46,462 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 11:17:46,462 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 11:17:46,462 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 11:17:46,463 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 11:17:46,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 11:17:46,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 11:17:46,837 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 460 trivial. 0 not checked. [2019-10-07 11:17:46,838 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 11:17:46,838 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 11:17:46,838 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-07 11:17:46,839 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 11:17:46,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 11:17:46,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-07 11:17:46,840 INFO L87 Difference]: Start difference. First operand 1174 states and 1653 transitions. Second operand 5 states. [2019-10-07 11:17:46,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 11:17:46,913 INFO L93 Difference]: Finished difference Result 2012 states and 2840 transitions. [2019-10-07 11:17:46,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-07 11:17:46,914 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 389 [2019-10-07 11:17:46,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 11:17:46,922 INFO L225 Difference]: With dead ends: 2012 [2019-10-07 11:17:46,922 INFO L226 Difference]: Without dead ends: 1186 [2019-10-07 11:17:46,927 INFO L606 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 [2019-10-07 11:17:46,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2019-10-07 11:17:46,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 1182. [2019-10-07 11:17:46,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1182 states. [2019-10-07 11:17:46,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 1663 transitions. [2019-10-07 11:17:46,990 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 1663 transitions. Word has length 389 [2019-10-07 11:17:46,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 11:17:46,991 INFO L462 AbstractCegarLoop]: Abstraction has 1182 states and 1663 transitions. [2019-10-07 11:17:46,991 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 11:17:46,991 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 1663 transitions. [2019-10-07 11:17:47,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2019-10-07 11:17:47,003 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 11:17:47,004 INFO L385 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] [2019-10-07 11:17:47,004 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 11:17:47,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 11:17:47,004 INFO L82 PathProgramCache]: Analyzing trace with hash 719521026, now seen corresponding path program 1 times [2019-10-07 11:17:47,005 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 11:17:47,005 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 11:17:47,005 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 11:17:47,005 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 11:17:47,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 11:17:47,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 11:17:47,403 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked. [2019-10-07 11:17:47,404 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 11:17:47,404 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 11:17:47,404 INFO L95 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 [2019-10-07 11:17:48,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 11:17:48,266 INFO L256 TraceCheckSpWp]: Trace formula consists of 2747 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-07 11:17:48,281 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 11:17:48,649 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2019-10-07 11:17:48,649 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 11:17:49,710 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 460 trivial. 0 not checked. [2019-10-07 11:17:49,711 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 11:17:49,712 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 10 [2019-10-07 11:17:49,713 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 11:17:49,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 11:17:49,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-10-07 11:17:49,715 INFO L87 Difference]: Start difference. First operand 1182 states and 1663 transitions. Second operand 5 states. [2019-10-07 11:17:49,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 11:17:49,826 INFO L93 Difference]: Finished difference Result 2287 states and 3232 transitions. [2019-10-07 11:17:49,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-07 11:17:49,827 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 395 [2019-10-07 11:17:49,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 11:17:49,837 INFO L225 Difference]: With dead ends: 2287 [2019-10-07 11:17:49,837 INFO L226 Difference]: Without dead ends: 1190 [2019-10-07 11:17:49,844 INFO L606 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 [2019-10-07 11:17:49,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2019-10-07 11:17:49,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 1184. [2019-10-07 11:17:49,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1184 states. [2019-10-07 11:17:49,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 1667 transitions. [2019-10-07 11:17:49,919 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 1667 transitions. Word has length 395 [2019-10-07 11:17:49,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 11:17:49,919 INFO L462 AbstractCegarLoop]: Abstraction has 1184 states and 1667 transitions. [2019-10-07 11:17:49,920 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 11:17:49,920 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 1667 transitions. [2019-10-07 11:17:49,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2019-10-07 11:17:49,930 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 11:17:49,931 INFO L385 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] [2019-10-07 11:17:50,141 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 11:17:50,142 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 11:17:50,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 11:17:50,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1401591383, now seen corresponding path program 1 times [2019-10-07 11:17:50,144 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 11:17:50,144 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 11:17:50,145 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 11:17:50,145 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 11:17:50,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 11:17:50,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 11:17:50,742 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2019-10-07 11:17:50,743 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 11:17:50,743 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 11:17:50,744 INFO L95 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 [2019-10-07 11:17:51,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 11:17:51,568 INFO L256 TraceCheckSpWp]: Trace formula consists of 2790 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-07 11:17:51,578 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 11:17:51,673 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 259 proven. 0 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2019-10-07 11:17:51,673 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 11:17:52,597 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2019-10-07 11:17:52,597 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 11:17:52,598 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2019-10-07 11:17:52,599 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 11:17:52,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 11:17:52,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-07 11:17:52,599 INFO L87 Difference]: Start difference. First operand 1184 states and 1667 transitions. Second operand 5 states. [2019-10-07 11:17:52,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 11:17:52,672 INFO L93 Difference]: Finished difference Result 2252 states and 3181 transitions. [2019-10-07 11:17:52,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-07 11:17:52,673 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 408 [2019-10-07 11:17:52,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 11:17:52,681 INFO L225 Difference]: With dead ends: 2252 [2019-10-07 11:17:52,682 INFO L226 Difference]: Without dead ends: 1190 [2019-10-07 11:17:52,689 INFO L606 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 [2019-10-07 11:17:52,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2019-10-07 11:17:52,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 1184. [2019-10-07 11:17:52,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1184 states. [2019-10-07 11:17:52,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 1665 transitions. [2019-10-07 11:17:52,751 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 1665 transitions. Word has length 408 [2019-10-07 11:17:52,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 11:17:52,752 INFO L462 AbstractCegarLoop]: Abstraction has 1184 states and 1665 transitions. [2019-10-07 11:17:52,752 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 11:17:52,752 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 1665 transitions. [2019-10-07 11:17:52,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2019-10-07 11:17:52,761 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 11:17:52,762 INFO L385 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] [2019-10-07 11:17:52,970 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 11:17:52,970 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 11:17:52,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 11:17:52,971 INFO L82 PathProgramCache]: Analyzing trace with hash -558461706, now seen corresponding path program 2 times [2019-10-07 11:17:52,971 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 11:17:52,971 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 11:17:52,972 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 11:17:52,972 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 11:17:52,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 11:17:53,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 11:17:53,738 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 718 trivial. 0 not checked. [2019-10-07 11:17:53,738 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 11:17:53,738 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 11:17:53,738 INFO L93 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