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 --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -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 20:56:00,453 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:56:00,456 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:56:00,475 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:56:00,475 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:56:00,478 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:56:00,480 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:56:00,490 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:56:00,494 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:56:00,498 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:56:00,500 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:56:00,501 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:56:00,501 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:56:00,502 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:56:00,503 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:56:00,504 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:56:00,504 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:56:00,505 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:56:00,507 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:56:00,508 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:56:00,510 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:56:00,511 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:56:00,512 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:56:00,513 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:56:00,515 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 20:56:00,515 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 20:56:00,515 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 20:56:00,516 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 20:56:00,516 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 20:56:00,517 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 20:56:00,518 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:56:00,518 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:56:00,519 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:56:00,520 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:56:00,521 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:56:00,521 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:56:00,525 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:56:00,525 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:56:00,525 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:56:00,526 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:56:00,527 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:56:00,530 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 20:56:00,558 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:56:00,559 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:56:00,560 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:56:00,563 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:56:00,563 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:56:00,564 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:56:00,564 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:56:00,565 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:56:00,565 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:56:00,565 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:56:00,565 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:56:00,565 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:56:00,565 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:56:00,566 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:56:00,566 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:56:00,566 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:56:00,566 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:56:00,567 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:56:00,567 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:56:00,567 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:56:00,567 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:56:00,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:56:00,568 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:56:00,568 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:56:00,568 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:56:00,568 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:56:00,569 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:56:00,569 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:56:00,569 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-13 20:56:00,858 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:56:00,871 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:56:00,875 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:56:00,877 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:56:00,877 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:56:00,878 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--pc87413_wdt.ko-entry_point.cil.out.i [2019-10-13 20:56:00,956 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de5ff44b9/9be1ebc1524d4dad875d4c26da2d9993/FLAGea08b3fbd [2019-10-13 20:56:01,719 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:56:01,721 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--pc87413_wdt.ko-entry_point.cil.out.i [2019-10-13 20:56:01,759 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de5ff44b9/9be1ebc1524d4dad875d4c26da2d9993/FLAGea08b3fbd [2019-10-13 20:56:02,266 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de5ff44b9/9be1ebc1524d4dad875d4c26da2d9993 [2019-10-13 20:56:02,276 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:56:02,278 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:56:02,279 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:56:02,279 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:56:02,283 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:56:02,284 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:56:02" (1/1) ... [2019-10-13 20:56:02,287 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4262f24d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:56:02, skipping insertion in model container [2019-10-13 20:56:02,287 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:56:02" (1/1) ... [2019-10-13 20:56:02,295 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:56:02,408 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:56:03,690 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:56:03,729 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:56:03,936 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:56:04,046 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:56:04,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:56:04 WrapperNode [2019-10-13 20:56:04,047 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:56:04,048 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:56:04,048 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:56:04,048 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:56:04,064 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:56:04" (1/1) ... [2019-10-13 20:56:04,064 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:56:04" (1/1) ... [2019-10-13 20:56:04,126 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:56:04" (1/1) ... [2019-10-13 20:56:04,127 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:56:04" (1/1) ... [2019-10-13 20:56:04,198 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:56:04" (1/1) ... [2019-10-13 20:56:04,216 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:56:04" (1/1) ... [2019-10-13 20:56:04,229 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:56:04" (1/1) ... [2019-10-13 20:56:04,249 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:56:04,250 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:56:04,250 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:56:04,250 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:56:04,251 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:56:04" (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 20:56:04,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:56:04,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:56:04,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~~TO~VOID [2019-10-13 20:56:04,333 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2019-10-13 20:56:04,333 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2019-10-13 20:56:04,334 INFO L138 BoogieDeclarations]: Found implementation of procedure slow_down_io [2019-10-13 20:56:04,334 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2019-10-13 20:56:04,335 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2019-10-13 20:56:04,335 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2019-10-13 20:56:04,335 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2019-10-13 20:56:04,336 INFO L138 BoogieDeclarations]: Found implementation of procedure outb_p [2019-10-13 20:56:04,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2019-10-13 20:56:04,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2019-10-13 20:56:04,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2019-10-13 20:56:04,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2019-10-13 20:56:04,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2019-10-13 20:56:04,339 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_ptr [2019-10-13 20:56:04,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_ulong [2019-10-13 20:56:04,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2019-10-13 20:56:04,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2019-10-13 20:56:04,341 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2019-10-13 20:56:04,341 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_select_wdt_out [2019-10-13 20:56:04,342 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_enable_swc [2019-10-13 20:56:04,342 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_get_swc_base_addr [2019-10-13 20:56:04,342 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_swc_bank3 [2019-10-13 20:56:04,342 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_programm_wdto [2019-10-13 20:56:04,342 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_enable_wden [2019-10-13 20:56:04,342 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_enable_sw_wd_tren [2019-10-13 20:56:04,342 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_disable_sw_wd_tren [2019-10-13 20:56:04,343 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_enable_sw_wd_trg [2019-10-13 20:56:04,343 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_disable_sw_wd_trg [2019-10-13 20:56:04,343 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_enable [2019-10-13 20:56:04,343 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_disable [2019-10-13 20:56:04,343 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_refresh [2019-10-13 20:56:04,343 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_open [2019-10-13 20:56:04,344 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_release [2019-10-13 20:56:04,344 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_status [2019-10-13 20:56:04,344 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_write [2019-10-13 20:56:04,344 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_ioctl [2019-10-13 20:56:04,345 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_notify_sys [2019-10-13 20:56:04,345 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_init [2019-10-13 20:56:04,345 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_exit [2019-10-13 20:56:04,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_file_operations_2 [2019-10-13 20:56:04,346 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:56:04,346 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv___module_get_5 [2019-10-13 20:56:04,346 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_nonseekable_open_6 [2019-10-13 20:56:04,346 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_misc_register_7 [2019-10-13 20:56:04,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_misc_deregister_8 [2019-10-13 20:56:04,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_misc_deregister_9 [2019-10-13 20:56:04,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2019-10-13 20:56:04,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2019-10-13 20:56:04,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_err_ptr [2019-10-13 20:56:04,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_ptr_err [2019-10-13 20:56:04,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err_or_null [2019-10-13 20:56:04,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_get [2019-10-13 20:56:04,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_try_module_get [2019-10-13 20:56:04,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put [2019-10-13 20:56:04,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put_and_exit [2019-10-13 20:56:04,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_refcount [2019-10-13 20:56:04,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2019-10-13 20:56:04,349 INFO L138 BoogieDeclarations]: Found implementation of procedure __copy_to_user_overflow [2019-10-13 20:56:04,349 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_fault [2019-10-13 20:56:04,350 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2019-10-13 20:56:04,350 INFO L138 BoogieDeclarations]: Found implementation of procedure __request_region [2019-10-13 20:56:04,350 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_to_user [2019-10-13 20:56:04,350 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock [2019-10-13 20:56:04,350 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_unlock [2019-10-13 20:56:04,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize [2019-10-13 20:56:04,351 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_deregister [2019-10-13 20:56:04,351 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_register [2019-10-13 20:56:04,351 INFO L138 BoogieDeclarations]: Found implementation of procedure no_llseek [2019-10-13 20:56:04,351 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2019-10-13 20:56:04,352 INFO L138 BoogieDeclarations]: Found implementation of procedure register_reboot_notifier [2019-10-13 20:56:04,352 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_reboot_notifier [2019-10-13 20:56:04,353 INFO L138 BoogieDeclarations]: Found implementation of procedure external_alloc [2019-10-13 20:56:04,353 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2019-10-13 20:56:04,353 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2019-10-13 20:56:04,353 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2019-10-13 20:56:04,353 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:56:04,354 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2019-10-13 20:56:04,354 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2019-10-13 20:56:04,354 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2019-10-13 20:56:04,355 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2019-10-13 20:56:04,355 INFO L130 BoogieDeclarations]: Found specification of procedure __might_fault [2019-10-13 20:56:04,355 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2019-10-13 20:56:04,356 INFO L130 BoogieDeclarations]: Found specification of procedure slow_down_io [2019-10-13 20:56:04,356 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~~TO~VOID [2019-10-13 20:56:04,357 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 20:56:04,357 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock [2019-10-13 20:56:04,357 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_unlock [2019-10-13 20:56:04,357 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2019-10-13 20:56:04,358 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2019-10-13 20:56:04,358 INFO L130 BoogieDeclarations]: Found specification of procedure __request_region [2019-10-13 20:56:04,358 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2019-10-13 20:56:04,358 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2019-10-13 20:56:04,358 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2019-10-13 20:56:04,358 INFO L130 BoogieDeclarations]: Found specification of procedure outb_p [2019-10-13 20:56:04,359 INFO L130 BoogieDeclarations]: Found specification of procedure ldv___module_get_5 [2019-10-13 20:56:04,359 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_get [2019-10-13 20:56:04,359 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 20:56:04,359 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-10-13 20:56:04,359 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:56:04,360 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2019-10-13 20:56:04,360 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_pointer [2019-10-13 20:56:04,360 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-13 20:56:04,360 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2019-10-13 20:56:04,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 20:56:04,360 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2019-10-13 20:56:04,361 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2019-10-13 20:56:04,361 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2019-10-13 20:56:04,361 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2019-10-13 20:56:04,361 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2019-10-13 20:56:04,361 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2019-10-13 20:56:04,362 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_ptr [2019-10-13 20:56:04,362 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_ulong [2019-10-13 20:56:04,362 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2019-10-13 20:56:04,363 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_file_operations_2 [2019-10-13 20:56:04,363 INFO L130 BoogieDeclarations]: Found specification of procedure misc_register [2019-10-13 20:56:04,363 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_misc_register_7 [2019-10-13 20:56:04,363 INFO L130 BoogieDeclarations]: Found specification of procedure misc_deregister [2019-10-13 20:56:04,364 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_misc_deregister_8 [2019-10-13 20:56:04,364 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_misc_deregister_9 [2019-10-13 20:56:04,364 INFO L130 BoogieDeclarations]: Found specification of procedure no_llseek [2019-10-13 20:56:04,364 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_nonseekable_open_6 [2019-10-13 20:56:04,365 INFO L130 BoogieDeclarations]: Found specification of procedure register_reboot_notifier [2019-10-13 20:56:04,365 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_reboot_notifier [2019-10-13 20:56:04,366 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_to_user [2019-10-13 20:56:04,366 INFO L130 BoogieDeclarations]: Found specification of procedure __copy_to_user_overflow [2019-10-13 20:56:04,366 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2019-10-13 20:56:04,366 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 20:56:04,366 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_select_wdt_out [2019-10-13 20:56:04,367 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_enable_swc [2019-10-13 20:56:04,367 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_get_swc_base_addr [2019-10-13 20:56:04,367 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_swc_bank3 [2019-10-13 20:56:04,367 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_programm_wdto [2019-10-13 20:56:04,368 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_enable_wden [2019-10-13 20:56:04,369 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_enable_sw_wd_tren [2019-10-13 20:56:04,372 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_disable_sw_wd_tren [2019-10-13 20:56:04,372 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_enable_sw_wd_trg [2019-10-13 20:56:04,372 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_disable_sw_wd_trg [2019-10-13 20:56:04,373 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_enable [2019-10-13 20:56:04,373 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_disable [2019-10-13 20:56:04,374 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_refresh [2019-10-13 20:56:04,374 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_open [2019-10-13 20:56:04,380 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_release [2019-10-13 20:56:04,381 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_status [2019-10-13 20:56:04,381 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_write [2019-10-13 20:56:04,382 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_ioctl [2019-10-13 20:56:04,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 20:56:04,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 20:56:04,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 20:56:04,383 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_notify_sys [2019-10-13 20:56:04,383 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_init [2019-10-13 20:56:04,383 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_exit [2019-10-13 20:56:04,383 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize [2019-10-13 20:56:04,383 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2019-10-13 20:56:04,384 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:56:04,384 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 20:56:04,384 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2019-10-13 20:56:04,384 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2019-10-13 20:56:04,384 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_err_ptr [2019-10-13 20:56:04,385 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_ptr_err [2019-10-13 20:56:04,385 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err_or_null [2019-10-13 20:56:04,385 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_try_module_get [2019-10-13 20:56:04,385 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put [2019-10-13 20:56:04,385 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put_and_exit [2019-10-13 20:56:04,385 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_refcount [2019-10-13 20:56:04,386 INFO L130 BoogieDeclarations]: Found specification of procedure external_alloc [2019-10-13 20:56:04,386 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2019-10-13 20:56:04,386 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 20:56:04,386 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2019-10-13 20:56:04,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:56:04,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 20:56:04,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-10-13 20:56:04,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:56:04,977 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2019-10-13 20:56:05,657 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_module_put_and_exitFINAL: assume true; [2019-10-13 20:56:08,487 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:56:08,488 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:56:08,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:56:08 BoogieIcfgContainer [2019-10-13 20:56:08,490 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:56:08,491 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:56:08,491 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:56:08,494 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:56:08,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:56:02" (1/3) ... [2019-10-13 20:56:08,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dab4bf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:56:08, skipping insertion in model container [2019-10-13 20:56:08,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:56:04" (2/3) ... [2019-10-13 20:56:08,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dab4bf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:56:08, skipping insertion in model container [2019-10-13 20:56:08,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:56:08" (3/3) ... [2019-10-13 20:56:08,500 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 20:56:08,511 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:56:08,523 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:56:08,535 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:56:08,573 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:56:08,573 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:56:08,573 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:56:08,573 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:56:08,573 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:56:08,574 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:56:08,574 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:56:08,574 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:56:08,617 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states. [2019-10-13 20:56:08,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-10-13 20:56:08,652 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:56:08,653 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 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] [2019-10-13 20:56:08,656 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:56:08,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:56:08,662 INFO L82 PathProgramCache]: Analyzing trace with hash -140049364, now seen corresponding path program 1 times [2019-10-13 20:56:08,672 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:56:08,673 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714971540] [2019-10-13 20:56:08,673 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:56:08,673 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:56:08,674 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:56:09,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:56:09,389 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2019-10-13 20:56:09,390 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714971540] [2019-10-13 20:56:09,391 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:56:09,391 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:56:09,391 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385919227] [2019-10-13 20:56:09,396 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:56:09,398 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:56:09,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:56:09,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:56:09,415 INFO L87 Difference]: Start difference. First operand 487 states. Second operand 3 states. [2019-10-13 20:56:09,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:56:09,572 INFO L93 Difference]: Finished difference Result 933 states and 1223 transitions. [2019-10-13 20:56:09,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:56:09,574 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 144 [2019-10-13 20:56:09,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:56:09,597 INFO L225 Difference]: With dead ends: 933 [2019-10-13 20:56:09,598 INFO L226 Difference]: Without dead ends: 472 [2019-10-13 20:56:09,610 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 20:56:09,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2019-10-13 20:56:09,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 467. [2019-10-13 20:56:09,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 467 states. [2019-10-13 20:56:09,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 607 transitions. [2019-10-13 20:56:09,770 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 607 transitions. Word has length 144 [2019-10-13 20:56:09,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:56:09,780 INFO L462 AbstractCegarLoop]: Abstraction has 467 states and 607 transitions. [2019-10-13 20:56:09,780 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:56:09,780 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 607 transitions. [2019-10-13 20:56:09,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-10-13 20:56:09,788 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:56:09,788 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 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] [2019-10-13 20:56:09,789 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:56:09,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:56:09,791 INFO L82 PathProgramCache]: Analyzing trace with hash -82791062, now seen corresponding path program 1 times [2019-10-13 20:56:09,791 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:56:09,791 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033655545] [2019-10-13 20:56:09,792 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:56:09,792 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:56:09,792 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:56:09,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:56:10,143 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2019-10-13 20:56:10,143 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033655545] [2019-10-13 20:56:10,143 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:56:10,144 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:56:10,144 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734531380] [2019-10-13 20:56:10,146 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:56:10,146 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:56:10,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:56:10,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:56:10,147 INFO L87 Difference]: Start difference. First operand 467 states and 607 transitions. Second operand 3 states. [2019-10-13 20:56:10,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:56:10,209 INFO L93 Difference]: Finished difference Result 896 states and 1169 transitions. [2019-10-13 20:56:10,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:56:10,210 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 144 [2019-10-13 20:56:10,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:56:10,220 INFO L225 Difference]: With dead ends: 896 [2019-10-13 20:56:10,221 INFO L226 Difference]: Without dead ends: 873 [2019-10-13 20:56:10,222 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 20:56:10,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2019-10-13 20:56:10,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 872. [2019-10-13 20:56:10,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 872 states. [2019-10-13 20:56:10,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1139 transitions. [2019-10-13 20:56:10,296 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1139 transitions. Word has length 144 [2019-10-13 20:56:10,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:56:10,298 INFO L462 AbstractCegarLoop]: Abstraction has 872 states and 1139 transitions. [2019-10-13 20:56:10,298 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:56:10,298 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1139 transitions. [2019-10-13 20:56:10,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2019-10-13 20:56:10,314 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:56:10,314 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:56:10,314 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:56:10,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:56:10,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1426613195, now seen corresponding path program 1 times [2019-10-13 20:56:10,315 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:56:10,315 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565388891] [2019-10-13 20:56:10,316 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:56:10,316 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:56:10,316 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:56:10,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:56:10,661 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 543 trivial. 0 not checked. [2019-10-13 20:56:10,662 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565388891] [2019-10-13 20:56:10,662 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:56:10,662 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:56:10,662 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366420063] [2019-10-13 20:56:10,663 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:56:10,664 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:56:10,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:56:10,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:56:10,664 INFO L87 Difference]: Start difference. First operand 872 states and 1139 transitions. Second operand 3 states. [2019-10-13 20:56:10,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:56:10,794 INFO L93 Difference]: Finished difference Result 1991 states and 2565 transitions. [2019-10-13 20:56:10,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:56:10,795 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 371 [2019-10-13 20:56:10,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:56:10,806 INFO L225 Difference]: With dead ends: 1991 [2019-10-13 20:56:10,806 INFO L226 Difference]: Without dead ends: 1157 [2019-10-13 20:56:10,810 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 20:56:10,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1157 states. [2019-10-13 20:56:10,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1157 to 1125. [2019-10-13 20:56:10,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1125 states. [2019-10-13 20:56:10,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 1437 transitions. [2019-10-13 20:56:10,897 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 1437 transitions. Word has length 371 [2019-10-13 20:56:10,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:56:10,898 INFO L462 AbstractCegarLoop]: Abstraction has 1125 states and 1437 transitions. [2019-10-13 20:56:10,898 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:56:10,898 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 1437 transitions. [2019-10-13 20:56:10,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2019-10-13 20:56:10,909 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:56:10,910 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 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, 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] [2019-10-13 20:56:10,910 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:56:10,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:56:10,911 INFO L82 PathProgramCache]: Analyzing trace with hash -614728245, now seen corresponding path program 1 times [2019-10-13 20:56:10,911 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:56:10,913 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278687977] [2019-10-13 20:56:10,913 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:56:10,913 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:56:10,913 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:56:11,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:56:11,320 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 631 trivial. 0 not checked. [2019-10-13 20:56:11,322 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278687977] [2019-10-13 20:56:11,322 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862849597] [2019-10-13 20:56:11,322 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 20:56:12,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:56:12,011 INFO L256 TraceCheckSpWp]: Trace formula consists of 2535 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 20:56:12,037 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:56:12,430 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 618 trivial. 0 not checked. [2019-10-13 20:56:12,431 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:56:13,423 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 632 trivial. 0 not checked. [2019-10-13 20:56:13,424 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 20:56:13,424 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 8 [2019-10-13 20:56:13,424 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491216154] [2019-10-13 20:56:13,426 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:56:13,426 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:56:13,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:56:13,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-10-13 20:56:13,427 INFO L87 Difference]: Start difference. First operand 1125 states and 1437 transitions. Second operand 4 states. [2019-10-13 20:56:13,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:56:13,802 INFO L93 Difference]: Finished difference Result 2987 states and 3838 transitions. [2019-10-13 20:56:13,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:56:13,802 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 448 [2019-10-13 20:56:13,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:56:13,817 INFO L225 Difference]: With dead ends: 2987 [2019-10-13 20:56:13,817 INFO L226 Difference]: Without dead ends: 1818 [2019-10-13 20:56:13,823 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 901 GetRequests, 895 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-10-13 20:56:13,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1818 states. [2019-10-13 20:56:13,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1818 to 1811. [2019-10-13 20:56:13,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1811 states. [2019-10-13 20:56:13,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1811 states to 1811 states and 2334 transitions. [2019-10-13 20:56:13,968 INFO L78 Accepts]: Start accepts. Automaton has 1811 states and 2334 transitions. Word has length 448 [2019-10-13 20:56:13,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:56:13,969 INFO L462 AbstractCegarLoop]: Abstraction has 1811 states and 2334 transitions. [2019-10-13 20:56:13,970 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:56:13,970 INFO L276 IsEmpty]: Start isEmpty. Operand 1811 states and 2334 transitions. [2019-10-13 20:56:13,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2019-10-13 20:56:13,984 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:56:13,985 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 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, 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] [2019-10-13 20:56:14,194 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:56:14,194 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:56:14,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:56:14,195 INFO L82 PathProgramCache]: Analyzing trace with hash 702037513, now seen corresponding path program 1 times [2019-10-13 20:56:14,195 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:56:14,195 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473991807] [2019-10-13 20:56:14,196 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:56:14,196 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:56:14,196 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:56:14,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:56:14,515 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2019-10-13 20:56:14,515 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473991807] [2019-10-13 20:56:14,516 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64519240] [2019-10-13 20:56:14,516 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 20:56:15,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:56:15,422 INFO L256 TraceCheckSpWp]: Trace formula consists of 2530 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 20:56:15,434 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:56:15,542 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 618 trivial. 0 not checked. [2019-10-13 20:56:15,543 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:56:16,501 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 632 trivial. 0 not checked. [2019-10-13 20:56:16,502 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 20:56:16,502 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 6 [2019-10-13 20:56:16,503 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782494963] [2019-10-13 20:56:16,505 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:56:16,505 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:56:16,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:56:16,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:56:16,506 INFO L87 Difference]: Start difference. First operand 1811 states and 2334 transitions. Second operand 3 states. [2019-10-13 20:56:16,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:56:16,649 INFO L93 Difference]: Finished difference Result 2819 states and 3606 transitions. [2019-10-13 20:56:16,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:56:16,650 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 448 [2019-10-13 20:56:16,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:56:16,657 INFO L225 Difference]: With dead ends: 2819 [2019-10-13 20:56:16,657 INFO L226 Difference]: Without dead ends: 1028 [2019-10-13 20:56:16,664 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 902 GetRequests, 898 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:56:16,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2019-10-13 20:56:16,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 1028. [2019-10-13 20:56:16,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1028 states. [2019-10-13 20:56:16,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 1298 transitions. [2019-10-13 20:56:16,720 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 1298 transitions. Word has length 448 [2019-10-13 20:56:16,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:56:16,721 INFO L462 AbstractCegarLoop]: Abstraction has 1028 states and 1298 transitions. [2019-10-13 20:56:16,721 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:56:16,721 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 1298 transitions. [2019-10-13 20:56:16,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2019-10-13 20:56:16,729 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:56:16,730 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 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] [2019-10-13 20:56:16,947 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:56:16,947 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:56:16,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:56:16,948 INFO L82 PathProgramCache]: Analyzing trace with hash 307794317, now seen corresponding path program 1 times [2019-10-13 20:56:16,948 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:56:16,949 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221376677] [2019-10-13 20:56:16,949 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:56:16,949 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:56:16,949 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:56:17,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:56:17,385 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 624 trivial. 0 not checked. [2019-10-13 20:56:17,386 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221376677] [2019-10-13 20:56:17,386 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:56:17,386 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:56:17,387 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841159595] [2019-10-13 20:56:17,387 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:56:17,388 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:56:17,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:56:17,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:56:17,388 INFO L87 Difference]: Start difference. First operand 1028 states and 1298 transitions. Second operand 6 states. [2019-10-13 20:56:17,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:56:17,513 INFO L93 Difference]: Finished difference Result 1753 states and 2244 transitions. [2019-10-13 20:56:17,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 20:56:17,514 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 454 [2019-10-13 20:56:17,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:56:17,530 INFO L225 Difference]: With dead ends: 1753 [2019-10-13 20:56:17,530 INFO L226 Difference]: Without dead ends: 1023 [2019-10-13 20:56:17,535 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 20:56:17,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2019-10-13 20:56:17,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 1021. [2019-10-13 20:56:17,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1021 states. [2019-10-13 20:56:17,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 1289 transitions. [2019-10-13 20:56:17,598 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 1289 transitions. Word has length 454 [2019-10-13 20:56:17,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:56:17,598 INFO L462 AbstractCegarLoop]: Abstraction has 1021 states and 1289 transitions. [2019-10-13 20:56:17,599 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:56:17,599 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 1289 transitions. [2019-10-13 20:56:17,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 797 [2019-10-13 20:56:17,612 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:56:17,613 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 14, 14, 6, 6, 6, 6, 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, 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, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:56:17,614 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:56:17,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:56:17,615 INFO L82 PathProgramCache]: Analyzing trace with hash -5102559, now seen corresponding path program 1 times [2019-10-13 20:56:17,615 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:56:17,615 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646498404] [2019-10-13 20:56:17,616 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:56:17,616 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:56:17,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:56:17,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:56:18,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4068 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 4049 trivial. 0 not checked. [2019-10-13 20:56:18,140 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646498404] [2019-10-13 20:56:18,140 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:56:18,140 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:56:18,141 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457890249] [2019-10-13 20:56:18,142 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:56:18,142 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:56:18,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:56:18,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:56:18,143 INFO L87 Difference]: Start difference. First operand 1021 states and 1289 transitions. Second operand 3 states. [2019-10-13 20:56:18,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:56:18,299 INFO L93 Difference]: Finished difference Result 2044 states and 2620 transitions. [2019-10-13 20:56:18,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:56:18,299 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 796 [2019-10-13 20:56:18,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:56:18,310 INFO L225 Difference]: With dead ends: 2044 [2019-10-13 20:56:18,310 INFO L226 Difference]: Without dead ends: 1326 [2019-10-13 20:56:18,314 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 20:56:18,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1326 states. [2019-10-13 20:56:18,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1326 to 1318. [2019-10-13 20:56:18,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1318 states. [2019-10-13 20:56:18,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 1660 transitions. [2019-10-13 20:56:18,386 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 1660 transitions. Word has length 796 [2019-10-13 20:56:18,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:56:18,388 INFO L462 AbstractCegarLoop]: Abstraction has 1318 states and 1660 transitions. [2019-10-13 20:56:18,388 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:56:18,389 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 1660 transitions. [2019-10-13 20:56:18,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 792 [2019-10-13 20:56:18,407 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:56:18,408 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 14, 14, 6, 6, 6, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:56:18,408 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:56:18,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:56:18,409 INFO L82 PathProgramCache]: Analyzing trace with hash 71902264, now seen corresponding path program 1 times [2019-10-13 20:56:18,409 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:56:18,409 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699950698] [2019-10-13 20:56:18,410 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:56:18,410 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:56:18,410 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:56:18,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:56:19,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4057 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4049 trivial. 0 not checked. [2019-10-13 20:56:19,568 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699950698] [2019-10-13 20:56:19,568 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834641207] [2019-10-13 20:56:19,568 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 20:56:20,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:56:20,697 INFO L256 TraceCheckSpWp]: Trace formula consists of 3409 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 20:56:20,723 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:56:21,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4057 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 3982 trivial. 0 not checked. [2019-10-13 20:56:21,198 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:56:22,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4057 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4049 trivial. 0 not checked. [2019-10-13 20:56:22,939 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 20:56:22,940 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 5 [2019-10-13 20:56:22,940 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204136378] [2019-10-13 20:56:22,941 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:56:22,942 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:56:22,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:56:22,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 20:56:22,942 INFO L87 Difference]: Start difference. First operand 1318 states and 1660 transitions. Second operand 4 states. [2019-10-13 20:56:23,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:56:23,696 INFO L93 Difference]: Finished difference Result 2921 states and 3728 transitions. [2019-10-13 20:56:23,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:56:23,697 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 791 [2019-10-13 20:56:23,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:56:23,719 INFO L225 Difference]: With dead ends: 2921 [2019-10-13 20:56:23,719 INFO L226 Difference]: Without dead ends: 2827 [2019-10-13 20:56:23,722 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 1585 GetRequests, 1580 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 20:56:23,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2827 states. [2019-10-13 20:56:23,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2827 to 2560. [2019-10-13 20:56:23,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2560 states. [2019-10-13 20:56:23,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2560 states to 2560 states and 3275 transitions. [2019-10-13 20:56:23,867 INFO L78 Accepts]: Start accepts. Automaton has 2560 states and 3275 transitions. Word has length 791 [2019-10-13 20:56:23,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:56:23,869 INFO L462 AbstractCegarLoop]: Abstraction has 2560 states and 3275 transitions. [2019-10-13 20:56:23,869 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:56:23,869 INFO L276 IsEmpty]: Start isEmpty. Operand 2560 states and 3275 transitions. [2019-10-13 20:56:23,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 792 [2019-10-13 20:56:23,892 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:56:23,893 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 14, 14, 6, 6, 6, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:56:24,105 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:56:24,106 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:56:24,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:56:24,106 INFO L82 PathProgramCache]: Analyzing trace with hash -322464522, now seen corresponding path program 1 times [2019-10-13 20:56:24,106 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:56:24,107 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345461923] [2019-10-13 20:56:24,107 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:56:24,107 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:56:24,107 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:56:24,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:56:25,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4057 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4049 trivial. 0 not checked. [2019-10-13 20:56:25,018 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345461923] [2019-10-13 20:56:25,018 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:56:25,018 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 20:56:25,019 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958871715] [2019-10-13 20:56:25,021 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 20:56:25,021 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:56:25,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 20:56:25,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 20:56:25,022 INFO L87 Difference]: Start difference. First operand 2560 states and 3275 transitions. Second operand 7 states. [2019-10-13 20:56:25,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:56:25,337 INFO L93 Difference]: Finished difference Result 6566 states and 8443 transitions. [2019-10-13 20:56:25,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 20:56:25,338 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 791 [2019-10-13 20:56:25,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:56:25,375 INFO L225 Difference]: With dead ends: 6566 [2019-10-13 20:56:25,376 INFO L226 Difference]: Without dead ends: 4309 [2019-10-13 20:56:25,390 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-13 20:56:25,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4309 states. [2019-10-13 20:56:25,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4309 to 2576. [2019-10-13 20:56:25,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2576 states. [2019-10-13 20:56:25,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2576 states to 2576 states and 3291 transitions. [2019-10-13 20:56:25,589 INFO L78 Accepts]: Start accepts. Automaton has 2576 states and 3291 transitions. Word has length 791 [2019-10-13 20:56:25,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:56:25,591 INFO L462 AbstractCegarLoop]: Abstraction has 2576 states and 3291 transitions. [2019-10-13 20:56:25,591 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 20:56:25,591 INFO L276 IsEmpty]: Start isEmpty. Operand 2576 states and 3291 transitions. [2019-10-13 20:56:25,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 931 [2019-10-13 20:56:25,611 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:56:25,613 INFO L380 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 17, 17, 6, 6, 6, 6, 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, 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, 1, 1, 1, 1, 1, 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 20:56:25,614 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:56:25,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:56:25,614 INFO L82 PathProgramCache]: Analyzing trace with hash 322739331, now seen corresponding path program 1 times [2019-10-13 20:56:25,614 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:56:25,615 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595035835] [2019-10-13 20:56:25,615 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:56:25,615 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:56:25,615 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:56:25,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:56:26,588 INFO L134 CoverageAnalysis]: Checked inductivity of 5691 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 5667 trivial. 0 not checked. [2019-10-13 20:56:26,589 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595035835] [2019-10-13 20:56:26,590 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:56:26,590 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 20:56:26,590 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690130611] [2019-10-13 20:56:26,591 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:56:26,591 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:56:26,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:56:26,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 20:56:26,592 INFO L87 Difference]: Start difference. First operand 2576 states and 3291 transitions. Second operand 5 states. [2019-10-13 20:56:35,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:56:35,606 INFO L93 Difference]: Finished difference Result 7999 states and 10362 transitions. [2019-10-13 20:56:35,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:56:35,607 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 930 [2019-10-13 20:56:35,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted.