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--pc87413_wdt.ko-entry_point.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 22:46:49,507 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 22:46:49,511 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 22:46:49,534 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 22:46:49,535 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 22:46:49,538 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 22:46:49,540 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 22:46:49,555 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 22:46:49,557 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 22:46:49,558 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 22:46:49,560 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 22:46:49,563 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 22:46:49,564 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 22:46:49,568 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 22:46:49,571 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 22:46:49,572 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 22:46:49,573 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 22:46:49,578 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 22:46:49,580 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 22:46:49,587 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 22:46:49,593 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 22:46:49,595 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 22:46:49,597 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 22:46:49,598 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 22:46:49,600 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 22:46:49,601 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 22:46:49,601 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 22:46:49,602 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 22:46:49,602 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 22:46:49,604 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 22:46:49,604 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 22:46:49,605 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 22:46:49,606 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 22:46:49,607 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 22:46:49,608 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 22:46:49,608 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 22:46:49,609 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 22:46:49,610 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 22:46:49,610 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 22:46:49,611 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 22:46:49,612 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 22:46:49,613 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 [2019-10-13 22:46:49,634 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 22:46:49,634 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 22:46:49,636 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 22:46:49,636 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 22:46:49,636 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 22:46:49,637 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 22:46:49,637 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 22:46:49,637 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 22:46:49,637 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 22:46:49,638 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 22:46:49,638 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 22:46:49,638 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 22:46:49,638 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 22:46:49,638 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 22:46:49,639 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 22:46:49,639 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 22:46:49,639 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 22:46:49,639 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 22:46:49,640 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 22:46:49,640 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 22:46:49,640 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 22:46:49,640 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 22:46:49,641 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 22:46:49,641 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 22:46:49,641 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 22:46:49,641 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 22:46:49,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 22:46:49,642 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 22:46:49,642 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 [2019-10-13 22:46:49,948 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 22:46:49,964 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 22:46:49,968 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 22:46:49,970 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 22:46:49,970 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 22:46:49,971 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--pc87413_wdt.ko-entry_point.cil.out.i [2019-10-13 22:46:50,057 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11711a3d8/e6a08e9ce1c14556a958c4d3283ca87a/FLAG53bc506bc [2019-10-13 22:46:50,899 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 22:46:50,904 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--pc87413_wdt.ko-entry_point.cil.out.i [2019-10-13 22:46:50,946 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11711a3d8/e6a08e9ce1c14556a958c4d3283ca87a/FLAG53bc506bc [2019-10-13 22:46:51,442 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11711a3d8/e6a08e9ce1c14556a958c4d3283ca87a [2019-10-13 22:46:51,451 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 22:46:51,453 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 22:46:51,454 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 22:46:51,454 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 22:46:51,458 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 22:46:51,459 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:46:51" (1/1) ... [2019-10-13 22:46:51,461 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11cec0c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:51, skipping insertion in model container [2019-10-13 22:46:51,462 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:46:51" (1/1) ... [2019-10-13 22:46:51,469 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 22:46:51,571 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 22:46:52,512 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 22:46:52,539 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 22:46:52,802 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 22:46:52,893 INFO L192 MainTranslator]: Completed translation [2019-10-13 22:46:52,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:52 WrapperNode [2019-10-13 22:46:52,894 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 22:46:52,895 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 22:46:52,895 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 22:46:52,895 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 22:46:52,909 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:52" (1/1) ... [2019-10-13 22:46:52,909 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:52" (1/1) ... [2019-10-13 22:46:52,946 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:52" (1/1) ... [2019-10-13 22:46:52,947 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:52" (1/1) ... [2019-10-13 22:46:53,023 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:52" (1/1) ... [2019-10-13 22:46:53,043 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:52" (1/1) ... [2019-10-13 22:46:53,058 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:52" (1/1) ... [2019-10-13 22:46:53,077 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 22:46:53,079 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 22:46:53,079 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 22:46:53,079 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 22:46:53,081 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:52" (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 [2019-10-13 22:46:53,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 22:46:53,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 22:46:53,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~~TO~VOID [2019-10-13 22:46:53,153 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2019-10-13 22:46:53,153 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2019-10-13 22:46:53,154 INFO L138 BoogieDeclarations]: Found implementation of procedure slow_down_io [2019-10-13 22:46:53,154 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2019-10-13 22:46:53,155 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2019-10-13 22:46:53,155 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2019-10-13 22:46:53,155 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2019-10-13 22:46:53,155 INFO L138 BoogieDeclarations]: Found implementation of procedure outb_p [2019-10-13 22:46:53,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2019-10-13 22:46:53,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2019-10-13 22:46:53,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2019-10-13 22:46:53,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2019-10-13 22:46:53,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2019-10-13 22:46:53,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_ptr [2019-10-13 22:46:53,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_ulong [2019-10-13 22:46:53,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2019-10-13 22:46:53,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2019-10-13 22:46:53,160 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2019-10-13 22:46:53,160 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_select_wdt_out [2019-10-13 22:46:53,160 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_enable_swc [2019-10-13 22:46:53,161 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_get_swc_base_addr [2019-10-13 22:46:53,161 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_swc_bank3 [2019-10-13 22:46:53,161 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_programm_wdto [2019-10-13 22:46:53,161 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_enable_wden [2019-10-13 22:46:53,161 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_enable_sw_wd_tren [2019-10-13 22:46:53,162 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_disable_sw_wd_tren [2019-10-13 22:46:53,162 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_enable_sw_wd_trg [2019-10-13 22:46:53,162 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_disable_sw_wd_trg [2019-10-13 22:46:53,162 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_enable [2019-10-13 22:46:53,162 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_disable [2019-10-13 22:46:53,162 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_refresh [2019-10-13 22:46:53,163 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_open [2019-10-13 22:46:53,163 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_release [2019-10-13 22:46:53,163 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_status [2019-10-13 22:46:53,163 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_write [2019-10-13 22:46:53,163 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_ioctl [2019-10-13 22:46:53,163 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_notify_sys [2019-10-13 22:46:53,164 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_init [2019-10-13 22:46:53,164 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_exit [2019-10-13 22:46:53,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_file_operations_2 [2019-10-13 22:46:53,164 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 22:46:53,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv___module_get_5 [2019-10-13 22:46:53,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_nonseekable_open_6 [2019-10-13 22:46:53,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_misc_register_7 [2019-10-13 22:46:53,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_misc_deregister_8 [2019-10-13 22:46:53,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_misc_deregister_9 [2019-10-13 22:46:53,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2019-10-13 22:46:53,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2019-10-13 22:46:53,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_err_ptr [2019-10-13 22:46:53,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_ptr_err [2019-10-13 22:46:53,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err_or_null [2019-10-13 22:46:53,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_get [2019-10-13 22:46:53,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_try_module_get [2019-10-13 22:46:53,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put [2019-10-13 22:46:53,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put_and_exit [2019-10-13 22:46:53,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_refcount [2019-10-13 22:46:53,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2019-10-13 22:46:53,168 INFO L138 BoogieDeclarations]: Found implementation of procedure __copy_to_user_overflow [2019-10-13 22:46:53,168 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_fault [2019-10-13 22:46:53,168 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2019-10-13 22:46:53,168 INFO L138 BoogieDeclarations]: Found implementation of procedure __request_region [2019-10-13 22:46:53,169 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_to_user [2019-10-13 22:46:53,169 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock [2019-10-13 22:46:53,169 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_unlock [2019-10-13 22:46:53,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize [2019-10-13 22:46:53,169 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_deregister [2019-10-13 22:46:53,169 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_register [2019-10-13 22:46:53,170 INFO L138 BoogieDeclarations]: Found implementation of procedure no_llseek [2019-10-13 22:46:53,170 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2019-10-13 22:46:53,170 INFO L138 BoogieDeclarations]: Found implementation of procedure register_reboot_notifier [2019-10-13 22:46:53,171 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_reboot_notifier [2019-10-13 22:46:53,171 INFO L138 BoogieDeclarations]: Found implementation of procedure external_alloc [2019-10-13 22:46:53,171 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2019-10-13 22:46:53,172 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2019-10-13 22:46:53,172 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2019-10-13 22:46:53,172 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 22:46:53,172 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2019-10-13 22:46:53,173 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2019-10-13 22:46:53,173 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2019-10-13 22:46:53,174 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2019-10-13 22:46:53,174 INFO L130 BoogieDeclarations]: Found specification of procedure __might_fault [2019-10-13 22:46:53,174 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2019-10-13 22:46:53,174 INFO L130 BoogieDeclarations]: Found specification of procedure slow_down_io [2019-10-13 22:46:53,174 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~~TO~VOID [2019-10-13 22:46:53,175 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 22:46:53,175 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock [2019-10-13 22:46:53,175 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_unlock [2019-10-13 22:46:53,176 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2019-10-13 22:46:53,176 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2019-10-13 22:46:53,176 INFO L130 BoogieDeclarations]: Found specification of procedure __request_region [2019-10-13 22:46:53,176 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2019-10-13 22:46:53,176 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2019-10-13 22:46:53,176 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2019-10-13 22:46:53,177 INFO L130 BoogieDeclarations]: Found specification of procedure outb_p [2019-10-13 22:46:53,177 INFO L130 BoogieDeclarations]: Found specification of procedure ldv___module_get_5 [2019-10-13 22:46:53,177 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_get [2019-10-13 22:46:53,177 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 22:46:53,177 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-10-13 22:46:53,178 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 22:46:53,178 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2019-10-13 22:46:53,178 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_pointer [2019-10-13 22:46:53,178 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-13 22:46:53,178 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2019-10-13 22:46:53,179 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 22:46:53,179 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2019-10-13 22:46:53,179 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2019-10-13 22:46:53,179 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2019-10-13 22:46:53,179 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2019-10-13 22:46:53,179 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2019-10-13 22:46:53,180 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2019-10-13 22:46:53,180 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_ptr [2019-10-13 22:46:53,180 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_ulong [2019-10-13 22:46:53,180 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2019-10-13 22:46:53,181 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_file_operations_2 [2019-10-13 22:46:53,181 INFO L130 BoogieDeclarations]: Found specification of procedure misc_register [2019-10-13 22:46:53,181 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_misc_register_7 [2019-10-13 22:46:53,181 INFO L130 BoogieDeclarations]: Found specification of procedure misc_deregister [2019-10-13 22:46:53,182 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_misc_deregister_8 [2019-10-13 22:46:53,182 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_misc_deregister_9 [2019-10-13 22:46:53,182 INFO L130 BoogieDeclarations]: Found specification of procedure no_llseek [2019-10-13 22:46:53,182 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_nonseekable_open_6 [2019-10-13 22:46:53,183 INFO L130 BoogieDeclarations]: Found specification of procedure register_reboot_notifier [2019-10-13 22:46:53,184 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_reboot_notifier [2019-10-13 22:46:53,184 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_to_user [2019-10-13 22:46:53,184 INFO L130 BoogieDeclarations]: Found specification of procedure __copy_to_user_overflow [2019-10-13 22:46:53,184 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2019-10-13 22:46:53,184 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 22:46:53,184 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_select_wdt_out [2019-10-13 22:46:53,185 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_enable_swc [2019-10-13 22:46:53,185 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_get_swc_base_addr [2019-10-13 22:46:53,186 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_swc_bank3 [2019-10-13 22:46:53,192 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_programm_wdto [2019-10-13 22:46:53,192 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_enable_wden [2019-10-13 22:46:53,192 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_enable_sw_wd_tren [2019-10-13 22:46:53,192 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_disable_sw_wd_tren [2019-10-13 22:46:53,193 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_enable_sw_wd_trg [2019-10-13 22:46:53,193 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_disable_sw_wd_trg [2019-10-13 22:46:53,193 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_enable [2019-10-13 22:46:53,194 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_disable [2019-10-13 22:46:53,194 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_refresh [2019-10-13 22:46:53,195 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_open [2019-10-13 22:46:53,200 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_release [2019-10-13 22:46:53,200 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_status [2019-10-13 22:46:53,201 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_write [2019-10-13 22:46:53,201 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_ioctl [2019-10-13 22:46:53,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 22:46:53,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 22:46:53,202 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 22:46:53,202 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_notify_sys [2019-10-13 22:46:53,202 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_init [2019-10-13 22:46:53,203 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_exit [2019-10-13 22:46:53,203 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize [2019-10-13 22:46:53,203 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2019-10-13 22:46:53,203 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 22:46:53,203 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 22:46:53,203 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2019-10-13 22:46:53,204 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2019-10-13 22:46:53,204 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_err_ptr [2019-10-13 22:46:53,204 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_ptr_err [2019-10-13 22:46:53,204 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err_or_null [2019-10-13 22:46:53,204 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_try_module_get [2019-10-13 22:46:53,204 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put [2019-10-13 22:46:53,204 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put_and_exit [2019-10-13 22:46:53,205 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_refcount [2019-10-13 22:46:53,205 INFO L130 BoogieDeclarations]: Found specification of procedure external_alloc [2019-10-13 22:46:53,205 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2019-10-13 22:46:53,205 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 22:46:53,205 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2019-10-13 22:46:53,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 22:46:53,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 22:46:53,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-10-13 22:46:53,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 22:46:53,884 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2019-10-13 22:46:54,573 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_module_put_and_exitFINAL: assume true; [2019-10-13 22:46:57,619 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 22:46:57,619 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 22:46:57,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:46:57 BoogieIcfgContainer [2019-10-13 22:46:57,621 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 22:46:57,622 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 22:46:57,623 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 22:46:57,625 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 22:46:57,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:46:51" (1/3) ... [2019-10-13 22:46:57,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22b20d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:46:57, skipping insertion in model container [2019-10-13 22:46:57,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:52" (2/3) ... [2019-10-13 22:46:57,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22b20d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:46:57, skipping insertion in model container [2019-10-13 22:46:57,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:46:57" (3/3) ... [2019-10-13 22:46:57,631 INFO L109 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--pc87413_wdt.ko-entry_point.cil.out.i [2019-10-13 22:46:57,642 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 22:46:57,653 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 22:46:57,665 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 22:46:57,707 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 22:46:57,707 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 22:46:57,707 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 22:46:57,708 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 22:46:57,708 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 22:46:57,708 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 22:46:57,708 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 22:46:57,708 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 22:46:57,736 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states. [2019-10-13 22:46:57,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-13 22:46:57,752 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 22:46:57,753 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] [2019-10-13 22:46:57,755 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 22:46:57,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 22:46:57,762 INFO L82 PathProgramCache]: Analyzing trace with hash -245972114, now seen corresponding path program 1 times [2019-10-13 22:46:57,771 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 22:46:57,772 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105131359] [2019-10-13 22:46:57,772 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:46:57,772 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:46:57,772 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 22:46:58,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:46:58,476 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2019-10-13 22:46:58,477 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105131359] [2019-10-13 22:46:58,478 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 22:46:58,479 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 22:46:58,479 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346817103] [2019-10-13 22:46:58,485 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 22:46:58,486 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 22:46:58,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 22:46:58,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 22:46:58,507 INFO L87 Difference]: Start difference. First operand 419 states. Second operand 3 states. [2019-10-13 22:46:58,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 22:46:58,691 INFO L93 Difference]: Finished difference Result 1152 states and 1514 transitions. [2019-10-13 22:46:58,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 22:46:58,693 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 120 [2019-10-13 22:46:58,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 22:46:58,728 INFO L225 Difference]: With dead ends: 1152 [2019-10-13 22:46:58,729 INFO L226 Difference]: Without dead ends: 741 [2019-10-13 22:46:58,741 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 [2019-10-13 22:46:58,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2019-10-13 22:46:58,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 737. [2019-10-13 22:46:58,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 737 states. [2019-10-13 22:46:58,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 958 transitions. [2019-10-13 22:46:58,898 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 958 transitions. Word has length 120 [2019-10-13 22:46:58,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 22:46:58,899 INFO L462 AbstractCegarLoop]: Abstraction has 737 states and 958 transitions. [2019-10-13 22:46:58,899 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 22:46:58,899 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 958 transitions. [2019-10-13 22:46:58,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2019-10-13 22:46:58,915 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 22:46:58,916 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 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] [2019-10-13 22:46:58,916 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 22:46:58,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 22:46:58,917 INFO L82 PathProgramCache]: Analyzing trace with hash -141493757, now seen corresponding path program 1 times [2019-10-13 22:46:58,920 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 22:46:58,920 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669921338] [2019-10-13 22:46:58,921 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:46:58,921 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:46:58,921 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 22:46:59,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:46:59,310 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 444 trivial. 0 not checked. [2019-10-13 22:46:59,310 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669921338] [2019-10-13 22:46:59,310 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 22:46:59,311 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 22:46:59,311 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780388550] [2019-10-13 22:46:59,316 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 22:46:59,317 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 22:46:59,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 22:46:59,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 22:46:59,322 INFO L87 Difference]: Start difference. First operand 737 states and 958 transitions. Second operand 3 states. [2019-10-13 22:46:59,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 22:46:59,465 INFO L93 Difference]: Finished difference Result 1692 states and 2170 transitions. [2019-10-13 22:46:59,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 22:46:59,465 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 320 [2019-10-13 22:46:59,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 22:46:59,474 INFO L225 Difference]: With dead ends: 1692 [2019-10-13 22:46:59,474 INFO L226 Difference]: Without dead ends: 990 [2019-10-13 22:46:59,478 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 [2019-10-13 22:46:59,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2019-10-13 22:46:59,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 964. [2019-10-13 22:46:59,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 964 states. [2019-10-13 22:46:59,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 1228 transitions. [2019-10-13 22:46:59,638 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 1228 transitions. Word has length 320 [2019-10-13 22:46:59,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 22:46:59,639 INFO L462 AbstractCegarLoop]: Abstraction has 964 states and 1228 transitions. [2019-10-13 22:46:59,639 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 22:46:59,639 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 1228 transitions. [2019-10-13 22:46:59,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2019-10-13 22:46:59,650 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 22:46:59,651 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 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] [2019-10-13 22:46:59,651 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 22:46:59,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 22:46:59,652 INFO L82 PathProgramCache]: Analyzing trace with hash -170760376, now seen corresponding path program 1 times [2019-10-13 22:46:59,652 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 22:46:59,652 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911747201] [2019-10-13 22:46:59,652 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:46:59,652 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:46:59,652 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 22:46:59,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:46:59,981 INFO L134 CoverageAnalysis]: Checked inductivity of 526 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 511 trivial. 0 not checked. [2019-10-13 22:46:59,982 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911747201] [2019-10-13 22:46:59,982 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049333181] [2019-10-13 22:46:59,982 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 [2019-10-13 22:47:00,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:47:00,575 INFO L256 TraceCheckSpWp]: Trace formula consists of 2469 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 22:47:00,609 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 22:47:00,982 INFO L134 CoverageAnalysis]: Checked inductivity of 526 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 501 trivial. 0 not checked. [2019-10-13 22:47:00,982 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 22:47:01,842 INFO L134 CoverageAnalysis]: Checked inductivity of 526 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2019-10-13 22:47:01,842 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 22:47:01,843 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [6] total 10 [2019-10-13 22:47:01,843 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62952464] [2019-10-13 22:47:01,844 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 22:47:01,845 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 22:47:01,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 22:47:01,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-10-13 22:47:01,845 INFO L87 Difference]: Start difference. First operand 964 states and 1228 transitions. Second operand 6 states. [2019-10-13 22:47:02,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 22:47:02,367 INFO L93 Difference]: Finished difference Result 1919 states and 2427 transitions. [2019-10-13 22:47:02,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 22:47:02,368 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 383 [2019-10-13 22:47:02,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 22:47:02,379 INFO L225 Difference]: With dead ends: 1919 [2019-10-13 22:47:02,379 INFO L226 Difference]: Without dead ends: 893 [2019-10-13 22:47:02,384 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 771 GetRequests, 763 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-10-13 22:47:02,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2019-10-13 22:47:02,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 887. [2019-10-13 22:47:02,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 887 states. [2019-10-13 22:47:02,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 1114 transitions. [2019-10-13 22:47:02,455 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 1114 transitions. Word has length 383 [2019-10-13 22:47:02,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 22:47:02,459 INFO L462 AbstractCegarLoop]: Abstraction has 887 states and 1114 transitions. [2019-10-13 22:47:02,459 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 22:47:02,459 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 1114 transitions. [2019-10-13 22:47:02,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2019-10-13 22:47:02,469 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 22:47:02,469 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 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] [2019-10-13 22:47:02,686 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 22:47:02,686 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 22:47:02,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 22:47:02,687 INFO L82 PathProgramCache]: Analyzing trace with hash 250780050, now seen corresponding path program 1 times [2019-10-13 22:47:02,688 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 22:47:02,688 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354660939] [2019-10-13 22:47:02,688 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:47:02,689 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:47:02,689 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 22:47:02,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:47:02,939 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2019-10-13 22:47:02,940 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354660939] [2019-10-13 22:47:02,940 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 22:47:02,941 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 22:47:02,942 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083515264] [2019-10-13 22:47:02,943 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 22:47:02,943 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 22:47:02,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 22:47:02,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 22:47:02,944 INFO L87 Difference]: Start difference. First operand 887 states and 1114 transitions. Second operand 6 states. [2019-10-13 22:47:03,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 22:47:03,052 INFO L93 Difference]: Finished difference Result 1499 states and 1904 transitions. [2019-10-13 22:47:03,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 22:47:03,053 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 387 [2019-10-13 22:47:03,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 22:47:03,059 INFO L225 Difference]: With dead ends: 1499 [2019-10-13 22:47:03,059 INFO L226 Difference]: Without dead ends: 881 [2019-10-13 22:47:03,063 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 22:47:03,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2019-10-13 22:47:03,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 881. [2019-10-13 22:47:03,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 881 states. [2019-10-13 22:47:03,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 1106 transitions. [2019-10-13 22:47:03,111 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 1106 transitions. Word has length 387 [2019-10-13 22:47:03,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 22:47:03,112 INFO L462 AbstractCegarLoop]: Abstraction has 881 states and 1106 transitions. [2019-10-13 22:47:03,112 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 22:47:03,112 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 1106 transitions. [2019-10-13 22:47:03,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 688 [2019-10-13 22:47:03,136 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 22:47:03,137 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 14, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 22:47:03,137 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 22:47:03,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 22:47:03,138 INFO L82 PathProgramCache]: Analyzing trace with hash -883959940, now seen corresponding path program 1 times [2019-10-13 22:47:03,138 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 22:47:03,138 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339369255] [2019-10-13 22:47:03,139 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:47:03,139 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:47:03,139 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 22:47:03,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:47:03,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3450 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 3431 trivial. 0 not checked. [2019-10-13 22:47:03,993 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339369255] [2019-10-13 22:47:03,993 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 22:47:03,994 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 22:47:03,994 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787563718] [2019-10-13 22:47:03,995 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 22:47:03,995 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 22:47:03,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 22:47:03,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 22:47:03,996 INFO L87 Difference]: Start difference. First operand 881 states and 1106 transitions. Second operand 7 states. [2019-10-13 22:47:04,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 22:47:04,180 INFO L93 Difference]: Finished difference Result 1781 states and 2270 transitions. [2019-10-13 22:47:04,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 22:47:04,181 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 687 [2019-10-13 22:47:04,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 22:47:04,189 INFO L225 Difference]: With dead ends: 1781 [2019-10-13 22:47:04,190 INFO L226 Difference]: Without dead ends: 1173 [2019-10-13 22:47:04,193 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 22:47:04,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2019-10-13 22:47:04,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 1166. [2019-10-13 22:47:04,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1166 states. [2019-10-13 22:47:04,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1166 states to 1166 states and 1463 transitions. [2019-10-13 22:47:04,259 INFO L78 Accepts]: Start accepts. Automaton has 1166 states and 1463 transitions. Word has length 687 [2019-10-13 22:47:04,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 22:47:04,261 INFO L462 AbstractCegarLoop]: Abstraction has 1166 states and 1463 transitions. [2019-10-13 22:47:04,261 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 22:47:04,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1166 states and 1463 transitions. [2019-10-13 22:47:04,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 683 [2019-10-13 22:47:04,283 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 22:47:04,283 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 14, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 22:47:04,284 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 22:47:04,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 22:47:04,284 INFO L82 PathProgramCache]: Analyzing trace with hash -870164457, now seen corresponding path program 1 times [2019-10-13 22:47:04,284 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 22:47:04,285 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575523467] [2019-10-13 22:47:04,285 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:47:04,285 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:47:04,285 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 22:47:04,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:47:05,092 INFO L134 CoverageAnalysis]: Checked inductivity of 3439 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3431 trivial. 0 not checked. [2019-10-13 22:47:05,092 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575523467] [2019-10-13 22:47:05,092 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958741328] [2019-10-13 22:47:05,093 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 [2019-10-13 22:47:05,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:47:05,738 INFO L256 TraceCheckSpWp]: Trace formula consists of 3298 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-13 22:47:05,761 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 22:47:06,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3439 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 3381 trivial. 0 not checked. [2019-10-13 22:47:06,205 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 22:47:06,242 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 22:47:07,813 INFO L134 CoverageAnalysis]: Checked inductivity of 3439 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3431 trivial. 0 not checked. [2019-10-13 22:47:07,814 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 22:47:07,814 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [8] total 17 [2019-10-13 22:47:07,814 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351245023] [2019-10-13 22:47:07,816 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 22:47:07,816 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 22:47:07,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 22:47:07,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2019-10-13 22:47:07,817 INFO L87 Difference]: Start difference. First operand 1166 states and 1463 transitions. Second operand 12 states. [2019-10-13 22:47:11,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 22:47:11,057 INFO L93 Difference]: Finished difference Result 2560 states and 3242 transitions. [2019-10-13 22:47:11,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 22:47:11,058 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 682 [2019-10-13 22:47:11,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 22:47:11,074 INFO L225 Difference]: With dead ends: 2560 [2019-10-13 22:47:11,074 INFO L226 Difference]: Without dead ends: 2476 [2019-10-13 22:47:11,077 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 1371 GetRequests, 1355 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2019-10-13 22:47:11,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2476 states. [2019-10-13 22:47:11,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2476 to 2250. [2019-10-13 22:47:11,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2250 states. [2019-10-13 22:47:11,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2250 states to 2250 states and 2858 transitions. [2019-10-13 22:47:11,211 INFO L78 Accepts]: Start accepts. Automaton has 2250 states and 2858 transitions. Word has length 682 [2019-10-13 22:47:11,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 22:47:11,213 INFO L462 AbstractCegarLoop]: Abstraction has 2250 states and 2858 transitions. [2019-10-13 22:47:11,213 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 22:47:11,213 INFO L276 IsEmpty]: Start isEmpty. Operand 2250 states and 2858 transitions. [2019-10-13 22:47:11,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 802 [2019-10-13 22:47:11,226 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 22:47:11,227 INFO L380 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 17, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 22:47:11,435 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 22:47:11,435 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 22:47:11,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 22:47:11,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1469004023, now seen corresponding path program 1 times [2019-10-13 22:47:11,436 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 22:47:11,436 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709013090] [2019-10-13 22:47:11,436 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:47:11,437 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:47:11,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 22:47:11,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:47:11,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4820 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4809 trivial. 0 not checked. [2019-10-13 22:47:11,999 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709013090] [2019-10-13 22:47:12,000 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 22:47:12,000 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 22:47:12,000 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879070722] [2019-10-13 22:47:12,001 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 22:47:12,002 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 22:47:12,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 22:47:12,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 22:47:12,002 INFO L87 Difference]: Start difference. First operand 2250 states and 2858 transitions. Second operand 5 states. [2019-10-13 22:47:20,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 22:47:20,158 INFO L93 Difference]: Finished difference Result 7020 states and 9051 transitions. [2019-10-13 22:47:20,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 22:47:20,159 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 801 [2019-10-13 22:47:20,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 22:47:20,192 INFO L225 Difference]: With dead ends: 7020 [2019-10-13 22:47:20,192 INFO L226 Difference]: Without dead ends: 5043 [2019-10-13 22:47:20,203 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-13 22:47:20,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5043 states. [2019-10-13 22:47:20,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5043 to 4600. [2019-10-13 22:47:20,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4600 states. [2019-10-13 22:47:20,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4600 states to 4600 states and 5834 transitions. [2019-10-13 22:47:20,463 INFO L78 Accepts]: Start accepts. Automaton has 4600 states and 5834 transitions. Word has length 801 [2019-10-13 22:47:20,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 22:47:20,464 INFO L462 AbstractCegarLoop]: Abstraction has 4600 states and 5834 transitions. [2019-10-13 22:47:20,464 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 22:47:20,465 INFO L276 IsEmpty]: Start isEmpty. Operand 4600 states and 5834 transitions. [2019-10-13 22:47:20,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 872 [2019-10-13 22:47:20,490 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 22:47:20,491 INFO L380 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 20, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2019-10-13 22:47:20,492 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 22:47:20,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 22:47:20,493 INFO L82 PathProgramCache]: Analyzing trace with hash -915343434, now seen corresponding path program 1 times [2019-10-13 22:47:20,498 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 22:47:20,499 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853309304] [2019-10-13 22:47:20,499 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:47:20,503 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:47:20,504 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 22:47:20,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:47:21,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6044 backedges. 24 proven. 9 refuted. 0 times theorem prover too weak. 6011 trivial. 0 not checked. [2019-10-13 22:47:21,568 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853309304] [2019-10-13 22:47:21,568 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854278706] [2019-10-13 22:47:21,568 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 [2019-10-13 22:47:22,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:47:22,369 INFO L256 TraceCheckSpWp]: Trace formula consists of 3822 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 22:47:22,387 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 22:47:22,805 INFO L134 CoverageAnalysis]: Checked inductivity of 6044 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 6015 trivial. 0 not checked. [2019-10-13 22:47:22,806 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 22:47:24,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6044 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 6017 trivial. 0 not checked. [2019-10-13 22:47:24,888 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 22:47:24,889 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2019-10-13 22:47:24,889 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251191653] [2019-10-13 22:47:24,890 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 22:47:24,890 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 22:47:24,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 22:47:24,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 22:47:24,891 INFO L87 Difference]: Start difference. First operand 4600 states and 5834 transitions. Second operand 3 states. [2019-10-13 22:47:25,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 22:47:25,066 INFO L93 Difference]: Finished difference Result 4642 states and 5873 transitions. [2019-10-13 22:47:25,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 22:47:25,067 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 871 [2019-10-13 22:47:25,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 22:47:25,097 INFO L225 Difference]: With dead ends: 4642 [2019-10-13 22:47:25,097 INFO L226 Difference]: Without dead ends: 4262 [2019-10-13 22:47:25,101 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 1747 GetRequests, 1742 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 22:47:25,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4262 states. [2019-10-13 22:47:25,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4262 to 4262. [2019-10-13 22:47:25,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4262 states. [2019-10-13 22:47:25,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4262 states to 4262 states and 5426 transitions. [2019-10-13 22:47:25,331 INFO L78 Accepts]: Start accepts. Automaton has 4262 states and 5426 transitions. Word has length 871 [2019-10-13 22:47:25,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 22:47:25,333 INFO L462 AbstractCegarLoop]: Abstraction has 4262 states and 5426 transitions. [2019-10-13 22:47:25,333 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 22:47:25,333 INFO L276 IsEmpty]: Start isEmpty. Operand 4262 states and 5426 transitions. [2019-10-13 22:47:25,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 867 [2019-10-13 22:47:25,353 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 22:47:25,356 INFO L380 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 20, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2019-10-13 22:47:25,572 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 22:47:25,572 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 22:47:25,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 22:47:25,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1812495261, now seen corresponding path program 1 times [2019-10-13 22:47:25,573 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 22:47:25,573 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16713992] [2019-10-13 22:47:25,574 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:47:25,574 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:47:25,574 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY