java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--pc87413_wdt.ko-entry_point.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-36ac518-m [2019-10-07 11:18:43,447 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-07 11:18:43,450 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-07 11:18:43,469 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-07 11:18:43,470 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-07 11:18:43,471 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-07 11:18:43,473 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-07 11:18:43,482 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-07 11:18:43,487 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-07 11:18:43,490 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-07 11:18:43,491 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-07 11:18:43,493 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-07 11:18:43,493 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-07 11:18:43,495 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-07 11:18:43,497 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-07 11:18:43,498 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-07 11:18:43,500 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-07 11:18:43,500 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-07 11:18:43,502 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-07 11:18:43,506 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-07 11:18:43,510 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-07 11:18:43,513 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-07 11:18:43,515 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-07 11:18:43,516 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-07 11:18:43,518 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-07 11:18:43,518 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-07 11:18:43,519 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-07 11:18:43,520 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-07 11:18:43,521 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-07 11:18:43,522 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-07 11:18:43,522 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-07 11:18:43,524 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-07 11:18:43,525 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-07 11:18:43,525 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-07 11:18:43,527 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-07 11:18:43,527 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-07 11:18:43,528 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-07 11:18:43,528 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-07 11:18:43,528 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-07 11:18:43,529 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-07 11:18:43,530 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-07 11:18:43,531 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-07 11:18:43,563 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-07 11:18:43,564 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-07 11:18:43,567 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-07 11:18:43,567 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-07 11:18:43,568 INFO L138 SettingsManager]: * Use SBE=true [2019-10-07 11:18:43,568 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-07 11:18:43,568 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-07 11:18:43,568 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-07 11:18:43,568 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-07 11:18:43,569 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-07 11:18:43,569 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-07 11:18:43,569 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-07 11:18:43,573 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-07 11:18:43,574 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-07 11:18:43,574 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-07 11:18:43,574 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-07 11:18:43,574 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-07 11:18:43,575 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-07 11:18:43,575 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-07 11:18:43,575 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-07 11:18:43,575 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-07 11:18:43,575 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 11:18:43,576 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-07 11:18:43,576 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-07 11:18:43,576 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-07 11:18:43,576 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-07 11:18:43,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-07 11:18:43,577 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-07 11:18:43,577 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-07 11:18:43,858 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-07 11:18:43,871 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-07 11:18:43,874 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-07 11:18:43,876 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-07 11:18:43,876 INFO L275 PluginConnector]: CDTParser initialized [2019-10-07 11:18:43,877 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--pc87413_wdt.ko-entry_point.cil.out.i [2019-10-07 11:18:43,940 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ee41ddf4/64e800ff0c8f4feeb4e8aaec4115041d/FLAGa4cb4fe86 [2019-10-07 11:18:44,662 INFO L306 CDTParser]: Found 1 translation units. [2019-10-07 11:18:44,664 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--pc87413_wdt.ko-entry_point.cil.out.i [2019-10-07 11:18:44,688 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ee41ddf4/64e800ff0c8f4feeb4e8aaec4115041d/FLAGa4cb4fe86 [2019-10-07 11:18:44,766 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ee41ddf4/64e800ff0c8f4feeb4e8aaec4115041d [2019-10-07 11:18:44,776 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-07 11:18:44,778 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-07 11:18:44,779 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-07 11:18:44,779 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-07 11:18:44,783 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-07 11:18:44,784 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 11:18:44" (1/1) ... [2019-10-07 11:18:44,786 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73e660f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 11:18:44, skipping insertion in model container [2019-10-07 11:18:44,787 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 11:18:44" (1/1) ... [2019-10-07 11:18:44,794 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-07 11:18:44,885 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-07 11:18:45,943 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 11:18:45,981 INFO L188 MainTranslator]: Completed pre-run [2019-10-07 11:18:46,186 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 11:18:46,287 INFO L192 MainTranslator]: Completed translation [2019-10-07 11:18:46,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 11:18:46 WrapperNode [2019-10-07 11:18:46,287 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-07 11:18:46,288 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-07 11:18:46,288 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-07 11:18:46,288 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-07 11:18:46,303 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 11:18:46" (1/1) ... [2019-10-07 11:18:46,304 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 11:18:46" (1/1) ... [2019-10-07 11:18:46,333 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 11:18:46" (1/1) ... [2019-10-07 11:18:46,334 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 11:18:46" (1/1) ... [2019-10-07 11:18:46,387 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 11:18:46" (1/1) ... [2019-10-07 11:18:46,409 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 11:18:46" (1/1) ... [2019-10-07 11:18:46,425 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 11:18:46" (1/1) ... [2019-10-07 11:18:46,451 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-07 11:18:46,452 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-07 11:18:46,452 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-07 11:18:46,452 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-07 11:18:46,456 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 11:18:46" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 11:18:46,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-07 11:18:46,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-07 11:18:46,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~~TO~VOID [2019-10-07 11:18:46,554 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2019-10-07 11:18:46,554 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2019-10-07 11:18:46,555 INFO L138 BoogieDeclarations]: Found implementation of procedure slow_down_io [2019-10-07 11:18:46,556 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2019-10-07 11:18:46,557 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2019-10-07 11:18:46,557 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2019-10-07 11:18:46,558 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2019-10-07 11:18:46,558 INFO L138 BoogieDeclarations]: Found implementation of procedure outb_p [2019-10-07 11:18:46,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2019-10-07 11:18:46,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2019-10-07 11:18:46,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2019-10-07 11:18:46,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2019-10-07 11:18:46,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2019-10-07 11:18:46,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_ptr [2019-10-07 11:18:46,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_ulong [2019-10-07 11:18:46,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2019-10-07 11:18:46,563 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2019-10-07 11:18:46,563 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2019-10-07 11:18:46,563 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_select_wdt_out [2019-10-07 11:18:46,564 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_enable_swc [2019-10-07 11:18:46,564 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_get_swc_base_addr [2019-10-07 11:18:46,564 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_swc_bank3 [2019-10-07 11:18:46,565 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_programm_wdto [2019-10-07 11:18:46,565 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_enable_wden [2019-10-07 11:18:46,565 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_enable_sw_wd_tren [2019-10-07 11:18:46,565 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_disable_sw_wd_tren [2019-10-07 11:18:46,566 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_enable_sw_wd_trg [2019-10-07 11:18:46,566 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_disable_sw_wd_trg [2019-10-07 11:18:46,566 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_enable [2019-10-07 11:18:46,566 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_disable [2019-10-07 11:18:46,567 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_refresh [2019-10-07 11:18:46,567 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_open [2019-10-07 11:18:46,568 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_release [2019-10-07 11:18:46,568 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_status [2019-10-07 11:18:46,568 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_write [2019-10-07 11:18:46,568 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_ioctl [2019-10-07 11:18:46,568 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_notify_sys [2019-10-07 11:18:46,568 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_init [2019-10-07 11:18:46,569 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_exit [2019-10-07 11:18:46,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_file_operations_2 [2019-10-07 11:18:46,569 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-07 11:18:46,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv___module_get_5 [2019-10-07 11:18:46,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_nonseekable_open_6 [2019-10-07 11:18:46,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_misc_register_7 [2019-10-07 11:18:46,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_misc_deregister_8 [2019-10-07 11:18:46,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_misc_deregister_9 [2019-10-07 11:18:46,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2019-10-07 11:18:46,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2019-10-07 11:18:46,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_err_ptr [2019-10-07 11:18:46,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_ptr_err [2019-10-07 11:18:46,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err_or_null [2019-10-07 11:18:46,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_get [2019-10-07 11:18:46,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_try_module_get [2019-10-07 11:18:46,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put [2019-10-07 11:18:46,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put_and_exit [2019-10-07 11:18:46,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_refcount [2019-10-07 11:18:46,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2019-10-07 11:18:46,573 INFO L138 BoogieDeclarations]: Found implementation of procedure __copy_to_user_overflow [2019-10-07 11:18:46,573 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_fault [2019-10-07 11:18:46,573 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2019-10-07 11:18:46,573 INFO L138 BoogieDeclarations]: Found implementation of procedure __request_region [2019-10-07 11:18:46,574 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_to_user [2019-10-07 11:18:46,574 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock [2019-10-07 11:18:46,574 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_unlock [2019-10-07 11:18:46,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize [2019-10-07 11:18:46,574 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_deregister [2019-10-07 11:18:46,575 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_register [2019-10-07 11:18:46,575 INFO L138 BoogieDeclarations]: Found implementation of procedure no_llseek [2019-10-07 11:18:46,575 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2019-10-07 11:18:46,575 INFO L138 BoogieDeclarations]: Found implementation of procedure register_reboot_notifier [2019-10-07 11:18:46,577 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_reboot_notifier [2019-10-07 11:18:46,577 INFO L138 BoogieDeclarations]: Found implementation of procedure external_alloc [2019-10-07 11:18:46,577 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2019-10-07 11:18:46,578 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2019-10-07 11:18:46,578 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2019-10-07 11:18:46,579 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-07 11:18:46,579 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2019-10-07 11:18:46,580 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2019-10-07 11:18:46,580 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2019-10-07 11:18:46,580 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2019-10-07 11:18:46,580 INFO L130 BoogieDeclarations]: Found specification of procedure __might_fault [2019-10-07 11:18:46,580 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2019-10-07 11:18:46,581 INFO L130 BoogieDeclarations]: Found specification of procedure slow_down_io [2019-10-07 11:18:46,581 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~~TO~VOID [2019-10-07 11:18:46,582 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-07 11:18:46,582 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock [2019-10-07 11:18:46,582 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_unlock [2019-10-07 11:18:46,582 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2019-10-07 11:18:46,582 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2019-10-07 11:18:46,583 INFO L130 BoogieDeclarations]: Found specification of procedure __request_region [2019-10-07 11:18:46,583 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2019-10-07 11:18:46,583 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2019-10-07 11:18:46,583 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2019-10-07 11:18:46,583 INFO L130 BoogieDeclarations]: Found specification of procedure outb_p [2019-10-07 11:18:46,583 INFO L130 BoogieDeclarations]: Found specification of procedure ldv___module_get_5 [2019-10-07 11:18:46,584 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_get [2019-10-07 11:18:46,584 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-07 11:18:46,584 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-10-07 11:18:46,584 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-07 11:18:46,584 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2019-10-07 11:18:46,584 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_pointer [2019-10-07 11:18:46,585 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-07 11:18:46,585 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2019-10-07 11:18:46,585 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-07 11:18:46,585 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2019-10-07 11:18:46,586 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2019-10-07 11:18:46,586 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2019-10-07 11:18:46,586 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2019-10-07 11:18:46,586 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2019-10-07 11:18:46,587 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2019-10-07 11:18:46,587 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_ptr [2019-10-07 11:18:46,587 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_ulong [2019-10-07 11:18:46,588 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2019-10-07 11:18:46,588 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_file_operations_2 [2019-10-07 11:18:46,588 INFO L130 BoogieDeclarations]: Found specification of procedure misc_register [2019-10-07 11:18:46,589 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_misc_register_7 [2019-10-07 11:18:46,589 INFO L130 BoogieDeclarations]: Found specification of procedure misc_deregister [2019-10-07 11:18:46,589 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_misc_deregister_8 [2019-10-07 11:18:46,589 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_misc_deregister_9 [2019-10-07 11:18:46,590 INFO L130 BoogieDeclarations]: Found specification of procedure no_llseek [2019-10-07 11:18:46,590 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_nonseekable_open_6 [2019-10-07 11:18:46,591 INFO L130 BoogieDeclarations]: Found specification of procedure register_reboot_notifier [2019-10-07 11:18:46,591 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_reboot_notifier [2019-10-07 11:18:46,591 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_to_user [2019-10-07 11:18:46,591 INFO L130 BoogieDeclarations]: Found specification of procedure __copy_to_user_overflow [2019-10-07 11:18:46,591 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2019-10-07 11:18:46,592 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-07 11:18:46,592 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_select_wdt_out [2019-10-07 11:18:46,592 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_enable_swc [2019-10-07 11:18:46,593 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_get_swc_base_addr [2019-10-07 11:18:46,593 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_swc_bank3 [2019-10-07 11:18:46,597 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_programm_wdto [2019-10-07 11:18:46,597 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_enable_wden [2019-10-07 11:18:46,597 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_enable_sw_wd_tren [2019-10-07 11:18:46,597 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_disable_sw_wd_tren [2019-10-07 11:18:46,598 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_enable_sw_wd_trg [2019-10-07 11:18:46,598 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_disable_sw_wd_trg [2019-10-07 11:18:46,598 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_enable [2019-10-07 11:18:46,598 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_disable [2019-10-07 11:18:46,599 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_refresh [2019-10-07 11:18:46,599 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_open [2019-10-07 11:18:46,606 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_release [2019-10-07 11:18:46,606 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_status [2019-10-07 11:18:46,607 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_write [2019-10-07 11:18:46,607 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_ioctl [2019-10-07 11:18:46,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-07 11:18:46,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-07 11:18:46,608 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-07 11:18:46,608 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_notify_sys [2019-10-07 11:18:46,608 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_init [2019-10-07 11:18:46,608 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_exit [2019-10-07 11:18:46,608 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize [2019-10-07 11:18:46,609 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2019-10-07 11:18:46,609 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-07 11:18:46,609 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-07 11:18:46,609 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2019-10-07 11:18:46,609 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2019-10-07 11:18:46,609 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_err_ptr [2019-10-07 11:18:46,610 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_ptr_err [2019-10-07 11:18:46,610 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err_or_null [2019-10-07 11:18:46,610 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_try_module_get [2019-10-07 11:18:46,610 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put [2019-10-07 11:18:46,610 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put_and_exit [2019-10-07 11:18:46,611 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_refcount [2019-10-07 11:18:46,611 INFO L130 BoogieDeclarations]: Found specification of procedure external_alloc [2019-10-07 11:18:46,611 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2019-10-07 11:18:46,611 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-07 11:18:46,611 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2019-10-07 11:18:46,611 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-07 11:18:46,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-07 11:18:46,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-10-07 11:18:46,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-07 11:18:47,201 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2019-10-07 11:18:47,996 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_module_put_and_exitFINAL: assume true; [2019-10-07 11:18:51,206 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-07 11:18:51,207 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-07 11:18:51,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 11:18:51 BoogieIcfgContainer [2019-10-07 11:18:51,209 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-07 11:18:51,210 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-07 11:18:51,210 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-07 11:18:51,213 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-07 11:18:51,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 11:18:44" (1/3) ... [2019-10-07 11:18:51,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cf719f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 11:18:51, skipping insertion in model container [2019-10-07 11:18:51,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 11:18:46" (2/3) ... [2019-10-07 11:18:51,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cf719f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 11:18:51, skipping insertion in model container [2019-10-07 11:18:51,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 11:18:51" (3/3) ... [2019-10-07 11:18:51,217 INFO L109 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--pc87413_wdt.ko-entry_point.cil.out.i [2019-10-07 11:18:51,227 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-07 11:18:51,237 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-07 11:18:51,249 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-07 11:18:51,279 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-07 11:18:51,279 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-07 11:18:51,279 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-07 11:18:51,279 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-07 11:18:51,280 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-07 11:18:51,280 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-07 11:18:51,280 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-07 11:18:51,280 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-07 11:18:51,309 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states. [2019-10-07 11:18:51,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-07 11:18:51,324 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 11:18:51,325 INFO L385 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 11:18:51,327 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 11:18:51,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 11:18:51,333 INFO L82 PathProgramCache]: Analyzing trace with hash -245972114, now seen corresponding path program 1 times [2019-10-07 11:18:51,342 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 11:18:51,342 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 11:18:51,343 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 11:18:51,343 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 11:18:51,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 11:18:51,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 11:18:51,974 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2019-10-07 11:18:51,974 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 11:18:51,975 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 11:18:51,975 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-07 11:18:51,979 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 11:18:51,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 11:18:51,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 11:18:51,996 INFO L87 Difference]: Start difference. First operand 419 states. Second operand 3 states. [2019-10-07 11:18:52,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 11:18:52,169 INFO L93 Difference]: Finished difference Result 1152 states and 1514 transitions. [2019-10-07 11:18:52,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 11:18:52,171 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 120 [2019-10-07 11:18:52,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 11:18:52,199 INFO L225 Difference]: With dead ends: 1152 [2019-10-07 11:18:52,199 INFO L226 Difference]: Without dead ends: 741 [2019-10-07 11:18:52,209 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 11:18:52,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2019-10-07 11:18:52,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 737. [2019-10-07 11:18:52,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 737 states. [2019-10-07 11:18:52,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 958 transitions. [2019-10-07 11:18:52,363 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 958 transitions. Word has length 120 [2019-10-07 11:18:52,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 11:18:52,364 INFO L462 AbstractCegarLoop]: Abstraction has 737 states and 958 transitions. [2019-10-07 11:18:52,364 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 11:18:52,364 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 958 transitions. [2019-10-07 11:18:52,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2019-10-07 11:18:52,379 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 11:18:52,380 INFO L385 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 11:18:52,380 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 11:18:52,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 11:18:52,381 INFO L82 PathProgramCache]: Analyzing trace with hash -141493757, now seen corresponding path program 1 times [2019-10-07 11:18:52,381 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 11:18:52,381 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 11:18:52,381 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 11:18:52,381 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 11:18:52,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 11:18:52,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 11:18:52,891 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 444 trivial. 0 not checked. [2019-10-07 11:18:52,891 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 11:18:52,891 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 11:18:52,892 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-07 11:18:52,894 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 11:18:52,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 11:18:52,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 11:18:52,895 INFO L87 Difference]: Start difference. First operand 737 states and 958 transitions. Second operand 3 states. [2019-10-07 11:18:53,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 11:18:53,061 INFO L93 Difference]: Finished difference Result 1692 states and 2170 transitions. [2019-10-07 11:18:53,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 11:18:53,066 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 320 [2019-10-07 11:18:53,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 11:18:53,079 INFO L225 Difference]: With dead ends: 1692 [2019-10-07 11:18:53,079 INFO L226 Difference]: Without dead ends: 990 [2019-10-07 11:18:53,085 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 11:18:53,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2019-10-07 11:18:53,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 964. [2019-10-07 11:18:53,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 964 states. [2019-10-07 11:18:53,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 1228 transitions. [2019-10-07 11:18:53,251 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 1228 transitions. Word has length 320 [2019-10-07 11:18:53,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 11:18:53,255 INFO L462 AbstractCegarLoop]: Abstraction has 964 states and 1228 transitions. [2019-10-07 11:18:53,255 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 11:18:53,256 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 1228 transitions. [2019-10-07 11:18:53,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2019-10-07 11:18:53,271 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 11:18:53,271 INFO L385 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 11:18:53,272 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 11:18:53,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 11:18:53,272 INFO L82 PathProgramCache]: Analyzing trace with hash -170760376, now seen corresponding path program 1 times [2019-10-07 11:18:53,272 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 11:18:53,272 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 11:18:53,273 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 11:18:53,273 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 11:18:53,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 11:18:53,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 11:18:53,656 INFO L134 CoverageAnalysis]: Checked inductivity of 526 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 511 trivial. 0 not checked. [2019-10-07 11:18:53,656 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 11:18:53,657 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 11:18:53,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 11:18:54,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 11:18:54,327 INFO L256 TraceCheckSpWp]: Trace formula consists of 2469 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-07 11:18:54,357 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 11:18:54,594 INFO L134 CoverageAnalysis]: Checked inductivity of 526 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 501 trivial. 0 not checked. [2019-10-07 11:18:54,594 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 11:18:55,454 INFO L134 CoverageAnalysis]: Checked inductivity of 526 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2019-10-07 11:18:55,454 INFO L211 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-07 11:18:55,454 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [6] total 10 [2019-10-07 11:18:55,456 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-07 11:18:55,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-07 11:18:55,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-10-07 11:18:55,457 INFO L87 Difference]: Start difference. First operand 964 states and 1228 transitions. Second operand 6 states. [2019-10-07 11:18:55,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 11:18:55,895 INFO L93 Difference]: Finished difference Result 1919 states and 2427 transitions. [2019-10-07 11:18:55,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-07 11:18:55,895 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 383 [2019-10-07 11:18:55,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 11:18:55,903 INFO L225 Difference]: With dead ends: 1919 [2019-10-07 11:18:55,903 INFO L226 Difference]: Without dead ends: 893 [2019-10-07 11:18:55,907 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 771 GetRequests, 763 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-10-07 11:18:55,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2019-10-07 11:18:55,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 887. [2019-10-07 11:18:55,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 887 states. [2019-10-07 11:18:55,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 1114 transitions. [2019-10-07 11:18:55,954 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 1114 transitions. Word has length 383 [2019-10-07 11:18:55,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 11:18:55,955 INFO L462 AbstractCegarLoop]: Abstraction has 887 states and 1114 transitions. [2019-10-07 11:18:55,955 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-07 11:18:55,955 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 1114 transitions. [2019-10-07 11:18:55,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2019-10-07 11:18:55,964 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 11:18:55,965 INFO L385 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 11:18:56,171 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 11:18:56,174 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 11:18:56,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 11:18:56,175 INFO L82 PathProgramCache]: Analyzing trace with hash 250780050, now seen corresponding path program 1 times [2019-10-07 11:18:56,175 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 11:18:56,175 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 11:18:56,175 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 11:18:56,176 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 11:18:56,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 11:18:56,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 11:18:56,525 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2019-10-07 11:18:56,526 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 11:18:56,526 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 11:18:56,526 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-07 11:18:56,529 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-07 11:18:56,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-07 11:18:56,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-07 11:18:56,530 INFO L87 Difference]: Start difference. First operand 887 states and 1114 transitions. Second operand 6 states. [2019-10-07 11:18:56,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 11:18:56,647 INFO L93 Difference]: Finished difference Result 1499 states and 1904 transitions. [2019-10-07 11:18:56,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-07 11:18:56,647 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 387 [2019-10-07 11:18:56,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 11:18:56,654 INFO L225 Difference]: With dead ends: 1499 [2019-10-07 11:18:56,654 INFO L226 Difference]: Without dead ends: 881 [2019-10-07 11:18:56,659 INFO L606 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 [2019-10-07 11:18:56,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2019-10-07 11:18:56,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 881. [2019-10-07 11:18:56,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 881 states. [2019-10-07 11:18:56,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 1106 transitions. [2019-10-07 11:18:56,711 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 1106 transitions. Word has length 387 [2019-10-07 11:18:56,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 11:18:56,717 INFO L462 AbstractCegarLoop]: Abstraction has 881 states and 1106 transitions. [2019-10-07 11:18:56,717 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-07 11:18:56,717 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 1106 transitions. [2019-10-07 11:18:56,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 688 [2019-10-07 11:18:56,742 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 11:18:56,742 INFO L385 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 14, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 11:18:56,743 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 11:18:56,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 11:18:56,743 INFO L82 PathProgramCache]: Analyzing trace with hash -883959940, now seen corresponding path program 1 times [2019-10-07 11:18:56,745 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 11:18:56,745 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 11:18:56,745 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 11:18:56,745 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 11:18:56,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 11:18:56,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 11:18:57,650 INFO L134 CoverageAnalysis]: Checked inductivity of 3450 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 3431 trivial. 0 not checked. [2019-10-07 11:18:57,651 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 11:18:57,651 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 11:18:57,651 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-07 11:18:57,652 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-07 11:18:57,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-07 11:18:57,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-07 11:18:57,653 INFO L87 Difference]: Start difference. First operand 881 states and 1106 transitions. Second operand 7 states. [2019-10-07 11:18:57,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 11:18:57,878 INFO L93 Difference]: Finished difference Result 1781 states and 2270 transitions. [2019-10-07 11:18:57,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 11:18:57,880 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 687 [2019-10-07 11:18:57,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 11:18:57,889 INFO L225 Difference]: With dead ends: 1781 [2019-10-07 11:18:57,889 INFO L226 Difference]: Without dead ends: 1173 [2019-10-07 11:18:57,893 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-07 11:18:57,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2019-10-07 11:18:57,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 1166. [2019-10-07 11:18:57,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1166 states. [2019-10-07 11:18:57,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1166 states to 1166 states and 1463 transitions. [2019-10-07 11:18:57,958 INFO L78 Accepts]: Start accepts. Automaton has 1166 states and 1463 transitions. Word has length 687 [2019-10-07 11:18:57,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 11:18:57,960 INFO L462 AbstractCegarLoop]: Abstraction has 1166 states and 1463 transitions. [2019-10-07 11:18:57,960 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-07 11:18:57,960 INFO L276 IsEmpty]: Start isEmpty. Operand 1166 states and 1463 transitions. [2019-10-07 11:18:57,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 683 [2019-10-07 11:18:57,980 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 11:18:57,981 INFO L385 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 14, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 11:18:57,982 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 11:18:57,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 11:18:57,983 INFO L82 PathProgramCache]: Analyzing trace with hash -870164457, now seen corresponding path program 1 times [2019-10-07 11:18:57,983 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 11:18:57,983 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 11:18:57,984 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 11:18:57,984 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 11:18:57,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 11:18:58,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 11:18:58,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3439 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3431 trivial. 0 not checked. [2019-10-07 11:18:58,995 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 11:18:58,995 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 11:18:58,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 11:18:59,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 11:18:59,606 INFO L256 TraceCheckSpWp]: Trace formula consists of 3298 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-07 11:18:59,628 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 11:19:00,059 INFO L134 CoverageAnalysis]: Checked inductivity of 3439 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 3381 trivial. 0 not checked. [2019-10-07 11:19:00,060 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 11:19:00,104 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 11:19:01,635 INFO L134 CoverageAnalysis]: Checked inductivity of 3439 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3431 trivial. 0 not checked. [2019-10-07 11:19:01,636 INFO L211 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-07 11:19:01,636 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [8] total 17 [2019-10-07 11:19:01,638 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-07 11:19:01,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-07 11:19:01,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2019-10-07 11:19:01,639 INFO L87 Difference]: Start difference. First operand 1166 states and 1463 transitions. Second operand 12 states. [2019-10-07 11:19:04,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 11:19:04,675 INFO L93 Difference]: Finished difference Result 2560 states and 3242 transitions. [2019-10-07 11:19:04,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-07 11:19:04,676 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 682 [2019-10-07 11:19:04,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 11:19:04,692 INFO L225 Difference]: With dead ends: 2560 [2019-10-07 11:19:04,693 INFO L226 Difference]: Without dead ends: 2476 [2019-10-07 11:19:04,695 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 1371 GetRequests, 1355 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2019-10-07 11:19:04,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2476 states. [2019-10-07 11:19:04,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2476 to 2250. [2019-10-07 11:19:04,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2250 states. [2019-10-07 11:19:04,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2250 states to 2250 states and 2858 transitions. [2019-10-07 11:19:04,813 INFO L78 Accepts]: Start accepts. Automaton has 2250 states and 2858 transitions. Word has length 682 [2019-10-07 11:19:04,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 11:19:04,815 INFO L462 AbstractCegarLoop]: Abstraction has 2250 states and 2858 transitions. [2019-10-07 11:19:04,815 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-07 11:19:04,815 INFO L276 IsEmpty]: Start isEmpty. Operand 2250 states and 2858 transitions. [2019-10-07 11:19:04,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 802 [2019-10-07 11:19:04,836 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 11:19:04,837 INFO L385 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 17, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 11:19:05,047 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 11:19:05,048 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 11:19:05,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 11:19:05,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1469004023, now seen corresponding path program 1 times [2019-10-07 11:19:05,049 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 11:19:05,049 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 11:19:05,049 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 11:19:05,050 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 11:19:05,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 11:19:05,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 11:19:05,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4820 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4809 trivial. 0 not checked. [2019-10-07 11:19:05,907 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 11:19:05,907 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 11:19:05,907 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-07 11:19:05,909 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 11:19:05,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 11:19:05,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-07 11:19:05,910 INFO L87 Difference]: Start difference. First operand 2250 states and 2858 transitions. Second operand 5 states. [2019-10-07 11:19:13,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 11:19:13,992 INFO L93 Difference]: Finished difference Result 7020 states and 9051 transitions. [2019-10-07 11:19:13,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 11:19:13,993 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 801 [2019-10-07 11:19:13,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 11:19:14,024 INFO L225 Difference]: With dead ends: 7020 [2019-10-07 11:19:14,024 INFO L226 Difference]: Without dead ends: 5043 [2019-10-07 11:19:14,034 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-07 11:19:14,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5043 states. [2019-10-07 11:19:14,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5043 to 4600. [2019-10-07 11:19:14,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4600 states. [2019-10-07 11:19:14,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4600 states to 4600 states and 5834 transitions. [2019-10-07 11:19:14,313 INFO L78 Accepts]: Start accepts. Automaton has 4600 states and 5834 transitions. Word has length 801 [2019-10-07 11:19:14,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 11:19:14,314 INFO L462 AbstractCegarLoop]: Abstraction has 4600 states and 5834 transitions. [2019-10-07 11:19:14,314 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 11:19:14,314 INFO L276 IsEmpty]: Start isEmpty. Operand 4600 states and 5834 transitions. [2019-10-07 11:19:14,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 872 [2019-10-07 11:19:14,337 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 11:19:14,338 INFO L385 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 20, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 11:19:14,338 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 11:19:14,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 11:19:14,339 INFO L82 PathProgramCache]: Analyzing trace with hash -915343434, now seen corresponding path program 1 times [2019-10-07 11:19:14,339 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 11:19:14,340 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 11:19:14,340 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 11:19:14,340 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 11:19:14,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 11:19:14,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 11:19:15,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6044 backedges. 24 proven. 9 refuted. 0 times theorem prover too weak. 6011 trivial. 0 not checked. [2019-10-07 11:19:15,230 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 11:19:15,230 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 11:19:15,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 11:19:16,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 11:19:16,019 INFO L256 TraceCheckSpWp]: Trace formula consists of 3822 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-07 11:19:16,036 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 11:19:16,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6044 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 6015 trivial. 0 not checked. [2019-10-07 11:19:16,837 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 11:19:18,708 INFO L134 CoverageAnalysis]: Checked inductivity of 6044 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 6017 trivial. 0 not checked. [2019-10-07 11:19:18,709 INFO L211 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-07 11:19:18,709 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2019-10-07 11:19:18,711 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 11:19:18,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 11:19:18,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-07 11:19:18,712 INFO L87 Difference]: Start difference. First operand 4600 states and 5834 transitions. Second operand 3 states. [2019-10-07 11:19:18,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 11:19:18,945 INFO L93 Difference]: Finished difference Result 4642 states and 5873 transitions. [2019-10-07 11:19:18,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 11:19:18,945 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 871 [2019-10-07 11:19:18,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 11:19:18,972 INFO L225 Difference]: With dead ends: 4642 [2019-10-07 11:19:18,972 INFO L226 Difference]: Without dead ends: 4262 [2019-10-07 11:19:18,977 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 1747 GetRequests, 1742 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-07 11:19:18,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4262 states. [2019-10-07 11:19:19,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4262 to 4262. [2019-10-07 11:19:19,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4262 states. [2019-10-07 11:19:19,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4262 states to 4262 states and 5426 transitions. [2019-10-07 11:19:19,218 INFO L78 Accepts]: Start accepts. Automaton has 4262 states and 5426 transitions. Word has length 871 [2019-10-07 11:19:19,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 11:19:19,221 INFO L462 AbstractCegarLoop]: Abstraction has 4262 states and 5426 transitions. [2019-10-07 11:19:19,221 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 11:19:19,221 INFO L276 IsEmpty]: Start isEmpty. Operand 4262 states and 5426 transitions. [2019-10-07 11:19:19,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 867 [2019-10-07 11:19:19,250 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 11:19:19,253 INFO L385 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 20, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 11:19:19,465 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 11:19:19,466 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 11:19:19,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 11:19:19,466 INFO L82 PathProgramCache]: Analyzing trace with hash -21587811, now seen corresponding path program 1 times [2019-10-07 11:19:19,467 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 11:19:19,467 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 11:19:19,467 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 11:19:19,467 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 11:19:19,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 11:19:19,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 11:19:20,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6028 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 6007 trivial. 0 not checked. [2019-10-07 11:19:20,257 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 11:19:20,258 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 11:19:20,258 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-07 11:19:20,260 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 11:19:20,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 11:19:20,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 11:19:20,261 INFO L87 Difference]: Start difference. First operand 4262 states and 5426 transitions. Second operand 3 states. [2019-10-07 11:19:20,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 11:19:20,631 INFO L93 Difference]: Finished difference Result 9039 states and 11532 transitions. [2019-10-07 11:19:20,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 11:19:20,632 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 866 [2019-10-07 11:19:20,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 11:19:20,661 INFO L225 Difference]: With dead ends: 9039 [2019-10-07 11:19:20,662 INFO L226 Difference]: Without dead ends: 5050 [2019-10-07 11:19:20,679 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 11:19:20,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5050 states. [2019-10-07 11:19:20,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5050 to 5036. [2019-10-07 11:19:20,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5036 states. [2019-10-07 11:19:20,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5036 states to 5036 states and 6362 transitions. [2019-10-07 11:19:20,923 INFO L78 Accepts]: Start accepts. Automaton has 5036 states and 6362 transitions. Word has length 866 [2019-10-07 11:19:20,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 11:19:20,927 INFO L462 AbstractCegarLoop]: Abstraction has 5036 states and 6362 transitions. [2019-10-07 11:19:20,927 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 11:19:20,927 INFO L276 IsEmpty]: Start isEmpty. Operand 5036 states and 6362 transitions. [2019-10-07 11:19:20,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 867 [2019-10-07 11:19:20,948 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 11:19:20,950 INFO L385 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 20, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 11:19:20,950 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 11:19:20,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 11:19:20,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1812495261, now seen corresponding path program 2 times [2019-10-07 11:19:20,951 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 11:19:20,952 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 11:19:20,952 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 11:19:20,952 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 11:19:20,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 11:19:21,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 11:19:22,256 INFO L134 CoverageAnalysis]: Checked inductivity of 6028 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 6003 trivial. 0 not checked. [2019-10-07 11:19:22,256 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 11:19:22,256 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 11:19:22,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 11:19:23,338 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-07 11:19:23,338 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-07 11:19:23,346 INFO L256 TraceCheckSpWp]: Trace formula consists of 1751 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-07 11:19:23,363 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 11:19:23,409 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 11:19:24,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6028 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 5955 trivial. 0 not checked. [2019-10-07 11:19:24,098 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 11:19:25,726 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 11:19:25,763 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 11:19:26,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6028 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 6003 trivial. 0 not checked. [2019-10-07 11:19:26,129 INFO L211 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-07 11:19:26,129 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [6] total 11 [2019-10-07 11:19:26,131 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-07 11:19:26,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-07 11:19:26,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-10-07 11:19:26,131 INFO L87 Difference]: Start difference. First operand 5036 states and 6362 transitions. Second operand 9 states. [2019-10-07 11:19:26,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 11:19:26,615 INFO L93 Difference]: Finished difference Result 10057 states and 12712 transitions. [2019-10-07 11:19:26,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-07 11:19:26,615 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 866 [2019-10-07 11:19:26,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 11:19:26,657 INFO L225 Difference]: With dead ends: 10057 [2019-10-07 11:19:26,657 INFO L226 Difference]: Without dead ends: 5041 [2019-10-07 11:19:26,678 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 1740 GetRequests, 1725 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-10-07 11:19:26,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5041 states. [2019-10-07 11:19:26,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5041 to 5041. [2019-10-07 11:19:26,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5041 states. [2019-10-07 11:19:27,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5041 states to 5041 states and 6367 transitions. [2019-10-07 11:19:27,007 INFO L78 Accepts]: Start accepts. Automaton has 5041 states and 6367 transitions. Word has length 866 [2019-10-07 11:19:27,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 11:19:27,008 INFO L462 AbstractCegarLoop]: Abstraction has 5041 states and 6367 transitions. [2019-10-07 11:19:27,008 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-07 11:19:27,009 INFO L276 IsEmpty]: Start isEmpty. Operand 5041 states and 6367 transitions. [2019-10-07 11:19:27,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 873 [2019-10-07 11:19:27,032 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 11:19:27,033 INFO L385 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 20, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 11:19:27,246 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 11:19:27,247 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 11:19:27,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 11:19:27,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1393963467, now seen corresponding path program 1 times [2019-10-07 11:19:27,248 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 11:19:27,248 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 11:19:27,248 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 11:19:27,248 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 11:19:27,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 11:19:27,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 11:19:28,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6079 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 6038 trivial. 0 not checked. [2019-10-07 11:19:28,534 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 11:19:28,534 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 11:19:28,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 11:19:30,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 11:19:30,074 INFO L256 TraceCheckSpWp]: Trace formula consists of 3846 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-07 11:19:30,090 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 11:19:30,417 INFO L134 CoverageAnalysis]: Checked inductivity of 6079 backedges. 98 proven. 1 refuted. 0 times theorem prover too weak. 5980 trivial. 0 not checked. [2019-10-07 11:19:30,417 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 11:19:32,112 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 11:19:32,145 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 11:19:32,146 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 11:19:32,147 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 11:19:32,318 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-07 11:19:34,422 WARN L191 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 38 [2019-10-07 11:19:34,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6079 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 6038 trivial. 0 not checked. [2019-10-07 11:19:34,795 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2019-10-07 11:19:34,833 INFO L162 IcfgInterpreter]: Started Sifa with 274 locations of interest [2019-10-07 11:19:34,834 INFO L169 IcfgInterpreter]: Building call graph [2019-10-07 11:19:34,842 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-07 11:19:34,850 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-07 11:19:34,851 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-07 11:19:44,899 WARN L191 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 634 [2019-10-07 11:19:47,138 WARN L191 SmtUtils]: Spent 649.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 147 [2019-10-07 11:19:47,347 WARN L191 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 651 [2019-10-07 11:19:47,603 WARN L191 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 651 [2019-10-07 11:19:47,865 WARN L191 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 651 [2019-10-07 11:19:48,228 WARN L191 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 742 [2019-10-07 11:19:48,445 WARN L191 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 742 [2019-10-07 11:19:48,633 WARN L191 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 742 [2019-10-07 11:19:48,852 WARN L191 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 742 [2019-10-07 11:19:49,472 WARN L191 SmtUtils]: Spent 605.00 ms on a formula simplification. DAG size of input: 744 DAG size of output: 742 [2019-10-07 11:19:49,739 WARN L191 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 742 [2019-10-07 11:19:49,950 WARN L191 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 742 [2019-10-07 11:19:50,158 WARN L191 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 742 [2019-10-07 11:19:50,348 WARN L191 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 742 [2019-10-07 11:19:50,545 WARN L191 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 742 [2019-10-07 11:19:50,561 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 220 for LOIs [2019-10-07 11:19:50,741 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 617 [2019-10-07 11:19:50,860 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 617 [2019-10-07 11:19:50,972 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2019-10-07 11:19:51,227 WARN L191 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 708 [2019-10-07 11:19:51,229 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 760 for LOIs [2019-10-07 11:19:51,417 WARN L191 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 760 [2019-10-07 11:19:51,612 WARN L191 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 760 [2019-10-07 11:19:51,881 WARN L191 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 809 [2019-10-07 11:19:52,249 WARN L191 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 820 [2019-10-07 11:19:52,462 WARN L191 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 820 [2019-10-07 11:19:52,788 WARN L191 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 881 [2019-10-07 11:21:28,939 WARN L191 SmtUtils]: Spent 7.13 s on a formula simplification that was a NOOP. DAG size: 1241 [2019-10-07 11:21:30,106 WARN L191 SmtUtils]: Spent 1.10 s on a formula simplification that was a NOOP. DAG size: 1782 [2019-10-07 11:21:33,052 WARN L191 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 101 [2019-10-07 11:21:34,213 WARN L191 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 1810 DAG size of output: 1806 [2019-10-07 11:21:34,536 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 11:21:34,537 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: ε at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.generateProof(TraceAbstractionRefinementEngine.java:177) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:133) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:436) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: ε at de.uni_freiburg.informatik.ultimate.lib.sifa.PriorityWorklist.add(PriorityWorklist.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.lambda$2(DagInterpreter.java:135) at java.lang.Iterable.forEach(Iterable.java:75) at java.util.Collections$UnmodifiableCollection.forEach(Collections.java:1080) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:135) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:104) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.computeTopSummary(TopInputCallSummarizer.java:78) at java.util.HashMap.computeIfAbsent(HashMap.java:1127) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.summarize(TopInputCallSummarizer.java:67) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretCallReturnSummary(DagInterpreter.java:230) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:214) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:197) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:166) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:130) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:129) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:99) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:99) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:287) ... 21 more [2019-10-07 11:21:34,544 INFO L168 Benchmark]: Toolchain (without parser) took 169765.83 ms. Allocated memory was 138.9 MB in the beginning and 2.3 GB in the end (delta: 2.2 GB). Free memory was 96.8 MB in the beginning and 1.8 GB in the end (delta: -1.7 GB). Peak memory consumption was 504.5 MB. Max. memory is 7.1 GB. [2019-10-07 11:21:34,545 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 138.9 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-07 11:21:34,545 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1508.91 ms. Allocated memory was 138.9 MB in the beginning and 206.6 MB in the end (delta: 67.6 MB). Free memory was 96.3 MB in the beginning and 121.8 MB in the end (delta: -25.4 MB). Peak memory consumption was 47.4 MB. Max. memory is 7.1 GB. [2019-10-07 11:21:34,546 INFO L168 Benchmark]: Boogie Preprocessor took 163.51 ms. Allocated memory is still 206.6 MB. Free memory was 121.8 MB in the beginning and 114.7 MB in the end (delta: 7.1 MB). Peak memory consumption was 7.1 MB. Max. memory is 7.1 GB. [2019-10-07 11:21:34,547 INFO L168 Benchmark]: RCFGBuilder took 4756.80 ms. Allocated memory was 206.6 MB in the beginning and 255.9 MB in the end (delta: 49.3 MB). Free memory was 114.7 MB in the beginning and 198.5 MB in the end (delta: -83.8 MB). Peak memory consumption was 78.4 MB. Max. memory is 7.1 GB. [2019-10-07 11:21:34,548 INFO L168 Benchmark]: TraceAbstraction took 163332.08 ms. Allocated memory was 255.9 MB in the beginning and 2.3 GB in the end (delta: 2.0 GB). Free memory was 196.4 MB in the beginning and 1.8 GB in the end (delta: -1.6 GB). Peak memory consumption was 487.2 MB. Max. memory is 7.1 GB. [2019-10-07 11:21:34,553 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 138.9 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1508.91 ms. Allocated memory was 138.9 MB in the beginning and 206.6 MB in the end (delta: 67.6 MB). Free memory was 96.3 MB in the beginning and 121.8 MB in the end (delta: -25.4 MB). Peak memory consumption was 47.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 163.51 ms. Allocated memory is still 206.6 MB. Free memory was 121.8 MB in the beginning and 114.7 MB in the end (delta: 7.1 MB). Peak memory consumption was 7.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 4756.80 ms. Allocated memory was 206.6 MB in the beginning and 255.9 MB in the end (delta: 49.3 MB). Free memory was 114.7 MB in the beginning and 198.5 MB in the end (delta: -83.8 MB). Peak memory consumption was 78.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 163332.08 ms. Allocated memory was 255.9 MB in the beginning and 2.3 GB in the end (delta: 2.0 GB). Free memory was 196.4 MB in the beginning and 1.8 GB in the end (delta: -1.6 GB). Peak memory consumption was 487.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: ε de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: ε: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:295) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...