java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 22:46:44,370 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 22:46:44,372 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 22:46:44,384 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 22:46:44,385 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 22:46:44,386 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 22:46:44,387 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 22:46:44,389 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 22:46:44,390 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 22:46:44,391 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 22:46:44,392 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 22:46:44,393 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 22:46:44,394 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 22:46:44,395 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 22:46:44,395 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 22:46:44,396 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 22:46:44,397 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 22:46:44,398 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 22:46:44,400 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 22:46:44,401 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 22:46:44,403 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 22:46:44,404 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 22:46:44,405 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 22:46:44,405 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 22:46:44,407 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 22:46:44,408 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 22:46:44,408 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 22:46:44,409 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 22:46:44,409 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 22:46:44,410 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 22:46:44,410 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 22:46:44,411 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 22:46:44,412 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 22:46:44,412 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 22:46:44,413 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 22:46:44,413 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 22:46:44,414 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 22:46:44,414 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 22:46:44,414 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 22:46:44,415 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 22:46:44,416 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 22:46:44,417 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 22:46:44,432 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 22:46:44,433 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 22:46:44,434 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 22:46:44,434 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 22:46:44,434 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 22:46:44,435 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 22:46:44,435 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 22:46:44,435 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 22:46:44,435 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 22:46:44,436 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 22:46:44,436 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 22:46:44,436 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 22:46:44,437 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 22:46:44,437 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 22:46:44,438 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 22:46:44,438 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 22:46:44,438 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 22:46:44,438 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 22:46:44,438 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 22:46:44,439 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 22:46:44,439 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 22:46:44,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 22:46:44,439 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 22:46:44,440 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 22:46:44,440 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 22:46:44,440 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 22:46:44,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 22:46:44,440 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 22:46:44,441 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-13 22:46:44,704 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 22:46:44,723 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 22:46:44,727 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 22:46:44,729 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 22:46:44,729 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 22:46:44,730 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i [2019-10-13 22:46:44,798 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fd6d0b82/238101fed5e84efdae676085c96adc63/FLAG168c670a6 [2019-10-13 22:46:45,453 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 22:46:45,454 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i [2019-10-13 22:46:45,493 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fd6d0b82/238101fed5e84efdae676085c96adc63/FLAG168c670a6 [2019-10-13 22:46:45,621 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fd6d0b82/238101fed5e84efdae676085c96adc63 [2019-10-13 22:46:45,630 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 22:46:45,632 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 22:46:45,633 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 22:46:45,633 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 22:46:45,636 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 22:46:45,637 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:46:45" (1/1) ... [2019-10-13 22:46:45,639 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26da050 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:45, skipping insertion in model container [2019-10-13 22:46:45,639 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:46:45" (1/1) ... [2019-10-13 22:46:45,646 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 22:46:45,752 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 22:46:46,696 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 22:46:46,724 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 22:46:46,897 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 22:46:46,966 INFO L192 MainTranslator]: Completed translation [2019-10-13 22:46:46,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:46 WrapperNode [2019-10-13 22:46:46,967 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 22:46:46,968 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 22:46:46,968 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 22:46:46,968 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 22:46:46,983 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:46" (1/1) ... [2019-10-13 22:46:46,983 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:46" (1/1) ... [2019-10-13 22:46:47,013 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:46" (1/1) ... [2019-10-13 22:46:47,014 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:46" (1/1) ... [2019-10-13 22:46:47,068 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:46" (1/1) ... [2019-10-13 22:46:47,079 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:46" (1/1) ... [2019-10-13 22:46:47,089 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:46" (1/1) ... [2019-10-13 22:46:47,103 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 22:46:47,104 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 22:46:47,104 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 22:46:47,104 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 22:46:47,105 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:46" (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 [2019-10-13 22:46:47,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 22:46:47,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 22:46:47,175 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2019-10-13 22:46:47,175 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2019-10-13 22:46:47,175 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2019-10-13 22:46:47,175 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_clear_bit [2019-10-13 22:46:47,176 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2019-10-13 22:46:47,176 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2019-10-13 22:46:47,176 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2019-10-13 22:46:47,176 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2019-10-13 22:46:47,176 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2019-10-13 22:46:47,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2019-10-13 22:46:47,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2019-10-13 22:46:47,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2019-10-13 22:46:47,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_ptr [2019-10-13 22:46:47,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_ulong [2019-10-13 22:46:47,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2019-10-13 22:46:47,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2019-10-13 22:46:47,178 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2019-10-13 22:46:47,178 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_enter [2019-10-13 22:46:47,179 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_exit [2019-10-13 22:46:47,179 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_select [2019-10-13 22:46:47,179 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_inb [2019-10-13 22:46:47,180 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_outb [2019-10-13 22:46:47,180 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_inw [2019-10-13 22:46:47,180 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_outw [2019-10-13 22:46:47,180 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_update_timeout [2019-10-13 22:46:47,180 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_round_time [2019-10-13 22:46:47,181 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_keepalive [2019-10-13 22:46:47,181 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_start [2019-10-13 22:46:47,181 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_stop [2019-10-13 22:46:47,181 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_set_timeout [2019-10-13 22:46:47,181 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_get_status [2019-10-13 22:46:47,181 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_open [2019-10-13 22:46:47,182 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_release [2019-10-13 22:46:47,182 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_write [2019-10-13 22:46:47,182 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_ioctl [2019-10-13 22:46:47,182 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_notify_sys [2019-10-13 22:46:47,182 INFO L138 BoogieDeclarations]: Found implementation of procedure it87_wdt_init [2019-10-13 22:46:47,183 INFO L138 BoogieDeclarations]: Found implementation of procedure it87_wdt_exit [2019-10-13 22:46:47,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_file_operations_2 [2019-10-13 22:46:47,183 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 22:46:47,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv___module_get_5 [2019-10-13 22:46:47,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_nonseekable_open_6 [2019-10-13 22:46:47,184 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_misc_register_7 [2019-10-13 22:46:47,184 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_misc_deregister_8 [2019-10-13 22:46:47,184 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2019-10-13 22:46:47,184 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2019-10-13 22:46:47,184 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_err_ptr [2019-10-13 22:46:47,184 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_ptr_err [2019-10-13 22:46:47,185 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err_or_null [2019-10-13 22:46:47,185 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_get [2019-10-13 22:46:47,185 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_try_module_get [2019-10-13 22:46:47,185 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put [2019-10-13 22:46:47,185 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put_and_exit [2019-10-13 22:46:47,185 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_refcount [2019-10-13 22:46:47,186 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2019-10-13 22:46:47,186 INFO L138 BoogieDeclarations]: Found implementation of procedure __copy_to_user_overflow [2019-10-13 22:46:47,186 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_fault [2019-10-13 22:46:47,186 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2019-10-13 22:46:47,186 INFO L138 BoogieDeclarations]: Found implementation of procedure __request_region [2019-10-13 22:46:47,187 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_to_user [2019-10-13 22:46:47,187 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize [2019-10-13 22:46:47,187 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_deregister [2019-10-13 22:46:47,187 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_register [2019-10-13 22:46:47,187 INFO L138 BoogieDeclarations]: Found implementation of procedure no_llseek [2019-10-13 22:46:47,188 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2019-10-13 22:46:47,188 INFO L138 BoogieDeclarations]: Found implementation of procedure register_reboot_notifier [2019-10-13 22:46:47,188 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_reboot_notifier [2019-10-13 22:46:47,188 INFO L138 BoogieDeclarations]: Found implementation of procedure external_alloc [2019-10-13 22:46:47,188 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2019-10-13 22:46:47,188 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2019-10-13 22:46:47,189 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2019-10-13 22:46:47,189 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 22:46:47,189 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2019-10-13 22:46:47,189 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2019-10-13 22:46:47,189 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2019-10-13 22:46:47,190 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2019-10-13 22:46:47,190 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_clear_bit [2019-10-13 22:46:47,190 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2019-10-13 22:46:47,190 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 22:46:47,190 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2019-10-13 22:46:47,191 INFO L130 BoogieDeclarations]: Found specification of procedure __might_fault [2019-10-13 22:46:47,191 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2019-10-13 22:46:47,191 INFO L130 BoogieDeclarations]: Found specification of procedure __request_region [2019-10-13 22:46:47,191 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2019-10-13 22:46:47,191 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2019-10-13 22:46:47,192 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2019-10-13 22:46:47,192 INFO L130 BoogieDeclarations]: Found specification of procedure ldv___module_get_5 [2019-10-13 22:46:47,192 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_get [2019-10-13 22:46:47,192 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 22:46:47,192 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-10-13 22:46:47,192 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 22:46:47,193 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2019-10-13 22:46:47,193 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_pointer [2019-10-13 22:46:47,193 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-13 22:46:47,193 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2019-10-13 22:46:47,193 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 22:46:47,193 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2019-10-13 22:46:47,194 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2019-10-13 22:46:47,194 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2019-10-13 22:46:47,194 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2019-10-13 22:46:47,194 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2019-10-13 22:46:47,194 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2019-10-13 22:46:47,194 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_ptr [2019-10-13 22:46:47,195 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_ulong [2019-10-13 22:46:47,195 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2019-10-13 22:46:47,195 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_file_operations_2 [2019-10-13 22:46:47,195 INFO L130 BoogieDeclarations]: Found specification of procedure no_llseek [2019-10-13 22:46:47,195 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_nonseekable_open_6 [2019-10-13 22:46:47,196 INFO L130 BoogieDeclarations]: Found specification of procedure misc_register [2019-10-13 22:46:47,196 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_misc_register_7 [2019-10-13 22:46:47,196 INFO L130 BoogieDeclarations]: Found specification of procedure misc_deregister [2019-10-13 22:46:47,196 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_misc_deregister_8 [2019-10-13 22:46:47,196 INFO L130 BoogieDeclarations]: Found specification of procedure register_reboot_notifier [2019-10-13 22:46:47,196 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_reboot_notifier [2019-10-13 22:46:47,197 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_to_user [2019-10-13 22:46:47,197 INFO L130 BoogieDeclarations]: Found specification of procedure __copy_to_user_overflow [2019-10-13 22:46:47,197 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2019-10-13 22:46:47,197 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 22:46:47,197 INFO L130 BoogieDeclarations]: Found specification of procedure superio_enter [2019-10-13 22:46:47,197 INFO L130 BoogieDeclarations]: Found specification of procedure superio_exit [2019-10-13 22:46:47,198 INFO L130 BoogieDeclarations]: Found specification of procedure superio_select [2019-10-13 22:46:47,198 INFO L130 BoogieDeclarations]: Found specification of procedure superio_inb [2019-10-13 22:46:47,198 INFO L130 BoogieDeclarations]: Found specification of procedure superio_outb [2019-10-13 22:46:47,198 INFO L130 BoogieDeclarations]: Found specification of procedure superio_inw [2019-10-13 22:46:47,198 INFO L130 BoogieDeclarations]: Found specification of procedure superio_outw [2019-10-13 22:46:47,198 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_update_timeout [2019-10-13 22:46:47,199 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_round_time [2019-10-13 22:46:47,199 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_keepalive [2019-10-13 22:46:47,199 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_start [2019-10-13 22:46:47,199 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_stop [2019-10-13 22:46:47,199 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_set_timeout [2019-10-13 22:46:47,200 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_get_status [2019-10-13 22:46:47,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 22:46:47,200 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_open [2019-10-13 22:46:47,200 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_release [2019-10-13 22:46:47,200 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_write [2019-10-13 22:46:47,201 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_ioctl [2019-10-13 22:46:47,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 22:46:47,201 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 22:46:47,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 22:46:47,201 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_notify_sys [2019-10-13 22:46:47,202 INFO L130 BoogieDeclarations]: Found specification of procedure it87_wdt_init [2019-10-13 22:46:47,202 INFO L130 BoogieDeclarations]: Found specification of procedure it87_wdt_exit [2019-10-13 22:46:47,202 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize [2019-10-13 22:46:47,202 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2019-10-13 22:46:47,202 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 22:46:47,202 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2019-10-13 22:46:47,203 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2019-10-13 22:46:47,203 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_err_ptr [2019-10-13 22:46:47,203 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_ptr_err [2019-10-13 22:46:47,203 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err_or_null [2019-10-13 22:46:47,203 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_try_module_get [2019-10-13 22:46:47,203 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put [2019-10-13 22:46:47,204 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put_and_exit [2019-10-13 22:46:47,204 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_refcount [2019-10-13 22:46:47,204 INFO L130 BoogieDeclarations]: Found specification of procedure external_alloc [2019-10-13 22:46:47,204 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2019-10-13 22:46:47,204 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 22:46:47,204 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2019-10-13 22:46:47,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 22:46:47,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 22:46:47,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2019-10-13 22:46:47,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-10-13 22:46:47,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 22:46:48,472 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2019-10-13 22:46:48,479 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_module_put_and_exitFINAL: assume true; [2019-10-13 22:46:50,996 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 22:46:50,996 INFO L284 CfgBuilder]: Removed 0 assume(true) statements. [2019-10-13 22:46:50,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:46:50 BoogieIcfgContainer [2019-10-13 22:46:50,998 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 22:46:50,999 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 22:46:50,999 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 22:46:51,002 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 22:46:51,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:46:45" (1/3) ... [2019-10-13 22:46:51,003 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fae35eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:46:51, skipping insertion in model container [2019-10-13 22:46:51,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:46:46" (2/3) ... [2019-10-13 22:46:51,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fae35eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:46:51, skipping insertion in model container [2019-10-13 22:46:51,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:46:50" (3/3) ... [2019-10-13 22:46:51,008 INFO L109 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i [2019-10-13 22:46:51,017 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 22:46:51,030 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 22:46:51,041 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 22:46:51,080 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 22:46:51,080 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 22:46:51,080 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 22:46:51,080 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 22:46:51,081 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 22:46:51,081 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 22:46:51,081 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 22:46:51,081 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 22:46:51,125 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states. [2019-10-13 22:46:51,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-10-13 22:46:51,160 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 22:46:51,161 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 22:46:51,164 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 22:46:51,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 22:46:51,171 INFO L82 PathProgramCache]: Analyzing trace with hash -2123511353, now seen corresponding path program 1 times [2019-10-13 22:46:51,181 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 22:46:51,181 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042238193] [2019-10-13 22:46:51,181 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:46:51,182 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:46:51,182 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 22:46:51,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:46:51,885 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2019-10-13 22:46:51,886 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042238193] [2019-10-13 22:46:51,887 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 22:46:51,887 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 22:46:51,889 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712656133] [2019-10-13 22:46:51,895 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 22:46:51,895 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 22:46:51,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 22:46:51,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 22:46:51,912 INFO L87 Difference]: Start difference. First operand 580 states. Second operand 3 states. [2019-10-13 22:46:52,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 22:46:52,118 INFO L93 Difference]: Finished difference Result 1107 states and 1613 transitions. [2019-10-13 22:46:52,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 22:46:52,120 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 126 [2019-10-13 22:46:52,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 22:46:52,158 INFO L225 Difference]: With dead ends: 1107 [2019-10-13 22:46:52,159 INFO L226 Difference]: Without dead ends: 1036 [2019-10-13 22:46:52,166 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 22:46:52,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2019-10-13 22:46:52,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 1032. [2019-10-13 22:46:52,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1032 states. [2019-10-13 22:46:52,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1498 transitions. [2019-10-13 22:46:52,356 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1498 transitions. Word has length 126 [2019-10-13 22:46:52,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 22:46:52,357 INFO L462 AbstractCegarLoop]: Abstraction has 1032 states and 1498 transitions. [2019-10-13 22:46:52,358 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 22:46:52,358 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1498 transitions. [2019-10-13 22:46:52,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2019-10-13 22:46:52,367 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 22:46:52,368 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 22:46:52,368 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 22:46:52,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 22:46:52,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1695427865, now seen corresponding path program 1 times [2019-10-13 22:46:52,369 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 22:46:52,369 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296980497] [2019-10-13 22:46:52,370 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:46:52,370 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:46:52,370 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 22:46:52,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:46:52,737 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-10-13 22:46:52,737 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296980497] [2019-10-13 22:46:52,738 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 22:46:52,738 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 22:46:52,738 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137132000] [2019-10-13 22:46:52,741 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 22:46:52,741 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 22:46:52,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 22:46:52,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 22:46:52,741 INFO L87 Difference]: Start difference. First operand 1032 states and 1498 transitions. Second operand 3 states. [2019-10-13 22:46:52,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 22:46:52,875 INFO L93 Difference]: Finished difference Result 2456 states and 3572 transitions. [2019-10-13 22:46:52,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 22:46:52,875 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 185 [2019-10-13 22:46:52,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 22:46:52,886 INFO L225 Difference]: With dead ends: 2456 [2019-10-13 22:46:52,886 INFO L226 Difference]: Without dead ends: 1459 [2019-10-13 22:46:52,893 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 22:46:52,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1459 states. [2019-10-13 22:46:52,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1459 to 1436. [2019-10-13 22:46:52,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1436 states. [2019-10-13 22:46:52,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 2092 transitions. [2019-10-13 22:46:52,995 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 2092 transitions. Word has length 185 [2019-10-13 22:46:52,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 22:46:52,997 INFO L462 AbstractCegarLoop]: Abstraction has 1436 states and 2092 transitions. [2019-10-13 22:46:52,997 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 22:46:52,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 2092 transitions. [2019-10-13 22:46:53,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2019-10-13 22:46:53,019 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 22:46:53,020 INFO L380 BasicCegarLoop]: trace histogram [13, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 22:46:53,020 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 22:46:53,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 22:46:53,023 INFO L82 PathProgramCache]: Analyzing trace with hash -356778446, now seen corresponding path program 1 times [2019-10-13 22:46:53,023 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 22:46:53,023 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060464442] [2019-10-13 22:46:53,023 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:46:53,023 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:46:53,024 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 22:46:53,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:46:53,510 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 449 trivial. 0 not checked. [2019-10-13 22:46:53,511 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060464442] [2019-10-13 22:46:53,511 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125620584] [2019-10-13 22:46:53,511 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 22:46:54,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:46:54,203 INFO L256 TraceCheckSpWp]: Trace formula consists of 2638 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 22:46:54,242 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 22:46:54,421 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 162 proven. 0 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2019-10-13 22:46:54,421 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 22:46:54,900 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 452 trivial. 0 not checked. [2019-10-13 22:46:54,900 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 22:46:54,901 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 4] total 7 [2019-10-13 22:46:54,901 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295488920] [2019-10-13 22:46:54,902 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 22:46:54,902 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 22:46:54,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 22:46:54,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-10-13 22:46:54,903 INFO L87 Difference]: Start difference. First operand 1436 states and 2092 transitions. Second operand 3 states. [2019-10-13 22:46:55,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 22:46:55,008 INFO L93 Difference]: Finished difference Result 2831 states and 4140 transitions. [2019-10-13 22:46:55,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 22:46:55,008 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 358 [2019-10-13 22:46:55,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 22:46:55,027 INFO L225 Difference]: With dead ends: 2831 [2019-10-13 22:46:55,027 INFO L226 Difference]: Without dead ends: 1436 [2019-10-13 22:46:55,037 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 720 GetRequests, 715 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-10-13 22:46:55,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1436 states. [2019-10-13 22:46:55,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1436 to 1436. [2019-10-13 22:46:55,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1436 states. [2019-10-13 22:46:55,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 2088 transitions. [2019-10-13 22:46:55,196 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 2088 transitions. Word has length 358 [2019-10-13 22:46:55,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 22:46:55,197 INFO L462 AbstractCegarLoop]: Abstraction has 1436 states and 2088 transitions. [2019-10-13 22:46:55,197 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 22:46:55,197 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 2088 transitions. [2019-10-13 22:46:55,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2019-10-13 22:46:55,210 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 22:46:55,211 INFO L380 BasicCegarLoop]: trace histogram [13, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 22:46:55,422 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 22:46:55,423 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 22:46:55,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 22:46:55,423 INFO L82 PathProgramCache]: Analyzing trace with hash -2013443434, now seen corresponding path program 1 times [2019-10-13 22:46:55,423 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 22:46:55,424 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772032520] [2019-10-13 22:46:55,424 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:46:55,424 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:46:55,424 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 22:46:55,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:46:55,837 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 451 trivial. 0 not checked. [2019-10-13 22:46:55,837 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772032520] [2019-10-13 22:46:55,838 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68911983] [2019-10-13 22:46:55,838 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 22:46:56,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:46:56,497 INFO L256 TraceCheckSpWp]: Trace formula consists of 2660 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 22:46:56,508 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 22:46:56,637 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-10-13 22:46:56,638 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 22:46:57,270 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2019-10-13 22:46:57,271 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 22:46:57,271 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [5] total 7 [2019-10-13 22:46:57,271 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350352539] [2019-10-13 22:46:57,273 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 22:46:57,273 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 22:46:57,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 22:46:57,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-10-13 22:46:57,274 INFO L87 Difference]: Start difference. First operand 1436 states and 2088 transitions. Second operand 4 states. [2019-10-13 22:46:58,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 22:46:58,436 INFO L93 Difference]: Finished difference Result 2831 states and 4129 transitions. [2019-10-13 22:46:58,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 22:46:58,437 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 363 [2019-10-13 22:46:58,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 22:46:58,457 INFO L225 Difference]: With dead ends: 2831 [2019-10-13 22:46:58,457 INFO L226 Difference]: Without dead ends: 1436 [2019-10-13 22:46:58,464 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 730 GetRequests, 722 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-10-13 22:46:58,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1436 states. [2019-10-13 22:46:58,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1436 to 1436. [2019-10-13 22:46:58,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1436 states. [2019-10-13 22:46:58,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 2086 transitions. [2019-10-13 22:46:58,546 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 2086 transitions. Word has length 363 [2019-10-13 22:46:58,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 22:46:58,549 INFO L462 AbstractCegarLoop]: Abstraction has 1436 states and 2086 transitions. [2019-10-13 22:46:58,549 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 22:46:58,549 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 2086 transitions. [2019-10-13 22:46:58,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2019-10-13 22:46:58,559 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 22:46:58,559 INFO L380 BasicCegarLoop]: trace histogram [13, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 22:46:58,766 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 22:46:58,767 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 22:46:58,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 22:46:58,767 INFO L82 PathProgramCache]: Analyzing trace with hash -118476032, now seen corresponding path program 1 times [2019-10-13 22:46:58,767 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 22:46:58,768 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132171454] [2019-10-13 22:46:58,768 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:46:58,768 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:46:58,768 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 22:46:58,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:46:59,257 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2019-10-13 22:46:59,259 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132171454] [2019-10-13 22:46:59,259 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758429817] [2019-10-13 22:46:59,260 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 22:46:59,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:46:59,867 INFO L256 TraceCheckSpWp]: Trace formula consists of 2683 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 22:46:59,877 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 22:47:00,018 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-10-13 22:47:00,018 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 22:47:00,576 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked. [2019-10-13 22:47:00,577 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 22:47:00,577 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5] total 9 [2019-10-13 22:47:00,578 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292746276] [2019-10-13 22:47:00,581 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 22:47:00,581 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 22:47:00,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 22:47:00,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-10-13 22:47:00,586 INFO L87 Difference]: Start difference. First operand 1436 states and 2086 transitions. Second operand 6 states. [2019-10-13 22:47:01,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 22:47:01,185 INFO L93 Difference]: Finished difference Result 2606 states and 3739 transitions. [2019-10-13 22:47:01,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 22:47:01,187 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 368 [2019-10-13 22:47:01,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 22:47:01,199 INFO L225 Difference]: With dead ends: 2606 [2019-10-13 22:47:01,199 INFO L226 Difference]: Without dead ends: 1115 [2019-10-13 22:47:01,208 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 740 GetRequests, 733 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-10-13 22:47:01,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2019-10-13 22:47:01,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 1115. [2019-10-13 22:47:01,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1115 states. [2019-10-13 22:47:01,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1115 states to 1115 states and 1555 transitions. [2019-10-13 22:47:01,283 INFO L78 Accepts]: Start accepts. Automaton has 1115 states and 1555 transitions. Word has length 368 [2019-10-13 22:47:01,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 22:47:01,284 INFO L462 AbstractCegarLoop]: Abstraction has 1115 states and 1555 transitions. [2019-10-13 22:47:01,284 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 22:47:01,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1115 states and 1555 transitions. [2019-10-13 22:47:01,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2019-10-13 22:47:01,296 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 22:47:01,296 INFO L380 BasicCegarLoop]: trace histogram [13, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 22:47:01,504 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 22:47:01,504 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 22:47:01,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 22:47:01,505 INFO L82 PathProgramCache]: Analyzing trace with hash 603448734, now seen corresponding path program 1 times [2019-10-13 22:47:01,505 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 22:47:01,505 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017729491] [2019-10-13 22:47:01,505 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:47:01,506 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:47:01,506 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 22:47:01,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:47:01,913 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 460 trivial. 0 not checked. [2019-10-13 22:47:01,913 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017729491] [2019-10-13 22:47:01,913 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 22:47:01,914 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 22:47:01,914 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737721814] [2019-10-13 22:47:01,915 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 22:47:01,915 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 22:47:01,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 22:47:01,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 22:47:01,916 INFO L87 Difference]: Start difference. First operand 1115 states and 1555 transitions. Second operand 5 states. [2019-10-13 22:47:03,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 22:47:03,102 INFO L93 Difference]: Finished difference Result 2163 states and 3037 transitions. [2019-10-13 22:47:03,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 22:47:03,103 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 386 [2019-10-13 22:47:03,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 22:47:03,110 INFO L225 Difference]: With dead ends: 2163 [2019-10-13 22:47:03,110 INFO L226 Difference]: Without dead ends: 1193 [2019-10-13 22:47:03,114 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 22:47:03,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1193 states. [2019-10-13 22:47:03,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1193 to 1174. [2019-10-13 22:47:03,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1174 states. [2019-10-13 22:47:03,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 1653 transitions. [2019-10-13 22:47:03,177 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 1653 transitions. Word has length 386 [2019-10-13 22:47:03,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 22:47:03,178 INFO L462 AbstractCegarLoop]: Abstraction has 1174 states and 1653 transitions. [2019-10-13 22:47:03,178 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 22:47:03,178 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 1653 transitions. [2019-10-13 22:47:03,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2019-10-13 22:47:03,192 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 22:47:03,192 INFO L380 BasicCegarLoop]: trace histogram [13, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 22:47:03,192 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 22:47:03,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 22:47:03,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1872226297, now seen corresponding path program 1 times [2019-10-13 22:47:03,193 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 22:47:03,193 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377271367] [2019-10-13 22:47:03,194 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:47:03,194 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:47:03,194 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 22:47:03,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:47:03,461 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 460 trivial. 0 not checked. [2019-10-13 22:47:03,462 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377271367] [2019-10-13 22:47:03,462 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 22:47:03,462 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 22:47:03,462 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282632037] [2019-10-13 22:47:03,463 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 22:47:03,463 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 22:47:03,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 22:47:03,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 22:47:03,464 INFO L87 Difference]: Start difference. First operand 1174 states and 1653 transitions. Second operand 5 states. [2019-10-13 22:47:03,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 22:47:03,544 INFO L93 Difference]: Finished difference Result 2012 states and 2840 transitions. [2019-10-13 22:47:03,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 22:47:03,544 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 389 [2019-10-13 22:47:03,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 22:47:03,555 INFO L225 Difference]: With dead ends: 2012 [2019-10-13 22:47:03,555 INFO L226 Difference]: Without dead ends: 1186 [2019-10-13 22:47:03,559 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 22:47:03,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2019-10-13 22:47:03,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 1182. [2019-10-13 22:47:03,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1182 states. [2019-10-13 22:47:03,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 1663 transitions. [2019-10-13 22:47:03,648 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 1663 transitions. Word has length 389 [2019-10-13 22:47:03,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 22:47:03,650 INFO L462 AbstractCegarLoop]: Abstraction has 1182 states and 1663 transitions. [2019-10-13 22:47:03,650 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 22:47:03,650 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 1663 transitions. [2019-10-13 22:47:03,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2019-10-13 22:47:03,670 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 22:47:03,670 INFO L380 BasicCegarLoop]: trace histogram [13, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 22:47:03,671 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 22:47:03,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 22:47:03,672 INFO L82 PathProgramCache]: Analyzing trace with hash 719521026, now seen corresponding path program 1 times [2019-10-13 22:47:03,672 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 22:47:03,672 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417854529] [2019-10-13 22:47:03,673 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:47:03,673 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:47:03,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 22:47:03,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:47:04,171 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked. [2019-10-13 22:47:04,172 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417854529] [2019-10-13 22:47:04,173 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561249451] [2019-10-13 22:47:04,173 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 22:47:04,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:47:04,830 INFO L256 TraceCheckSpWp]: Trace formula consists of 2747 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 22:47:04,840 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 22:47:04,929 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2019-10-13 22:47:04,930 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 22:47:05,591 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 460 trivial. 0 not checked. [2019-10-13 22:47:05,592 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 22:47:05,592 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 10 [2019-10-13 22:47:05,593 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269271731] [2019-10-13 22:47:05,594 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 22:47:05,594 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 22:47:05,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 22:47:05,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-10-13 22:47:05,595 INFO L87 Difference]: Start difference. First operand 1182 states and 1663 transitions. Second operand 5 states. [2019-10-13 22:47:05,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 22:47:05,691 INFO L93 Difference]: Finished difference Result 2287 states and 3232 transitions. [2019-10-13 22:47:05,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 22:47:05,692 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 395 [2019-10-13 22:47:05,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 22:47:05,703 INFO L225 Difference]: With dead ends: 2287 [2019-10-13 22:47:05,703 INFO L226 Difference]: Without dead ends: 1190 [2019-10-13 22:47:05,710 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 797 GetRequests, 789 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-10-13 22:47:05,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2019-10-13 22:47:05,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 1184. [2019-10-13 22:47:05,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1184 states. [2019-10-13 22:47:05,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 1667 transitions. [2019-10-13 22:47:05,802 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 1667 transitions. Word has length 395 [2019-10-13 22:47:05,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 22:47:05,803 INFO L462 AbstractCegarLoop]: Abstraction has 1184 states and 1667 transitions. [2019-10-13 22:47:05,803 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 22:47:05,803 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 1667 transitions. [2019-10-13 22:47:05,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2019-10-13 22:47:05,825 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 22:47:05,825 INFO L380 BasicCegarLoop]: trace histogram [17, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 22:47:06,036 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 22:47:06,036 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 22:47:06,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 22:47:06,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1401591383, now seen corresponding path program 1 times [2019-10-13 22:47:06,038 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 22:47:06,038 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592839659] [2019-10-13 22:47:06,038 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:47:06,038 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:47:06,039 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 22:47:06,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:47:07,357 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2019-10-13 22:47:07,358 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592839659] [2019-10-13 22:47:07,359 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527389978] [2019-10-13 22:47:07,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 22:47:08,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:47:08,344 INFO L256 TraceCheckSpWp]: Trace formula consists of 2790 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 22:47:08,359 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 22:47:08,468 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 259 proven. 0 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2019-10-13 22:47:08,468 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 22:47:09,079 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2019-10-13 22:47:09,079 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 22:47:09,080 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2019-10-13 22:47:09,080 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695103055] [2019-10-13 22:47:09,082 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 22:47:09,082 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 22:47:09,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 22:47:09,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-13 22:47:09,083 INFO L87 Difference]: Start difference. First operand 1184 states and 1667 transitions. Second operand 5 states. [2019-10-13 22:47:09,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 22:47:09,176 INFO L93 Difference]: Finished difference Result 2252 states and 3181 transitions. [2019-10-13 22:47:09,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 22:47:09,176 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 408 [2019-10-13 22:47:09,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 22:47:09,186 INFO L225 Difference]: With dead ends: 2252 [2019-10-13 22:47:09,186 INFO L226 Difference]: Without dead ends: 1190 [2019-10-13 22:47:09,193 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 820 GetRequests, 814 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-13 22:47:09,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2019-10-13 22:47:09,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 1184. [2019-10-13 22:47:09,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1184 states. [2019-10-13 22:47:09,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 1665 transitions. [2019-10-13 22:47:09,275 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 1665 transitions. Word has length 408 [2019-10-13 22:47:09,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 22:47:09,276 INFO L462 AbstractCegarLoop]: Abstraction has 1184 states and 1665 transitions. [2019-10-13 22:47:09,276 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 22:47:09,276 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 1665 transitions. [2019-10-13 22:47:09,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2019-10-13 22:47:09,290 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 22:47:09,291 INFO L380 BasicCegarLoop]: trace histogram [21, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 22:47:09,502 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 22:47:09,502 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 22:47:09,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 22:47:09,503 INFO L82 PathProgramCache]: Analyzing trace with hash -558461706, now seen corresponding path program 2 times [2019-10-13 22:47:09,503 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 22:47:09,504 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987101492] [2019-10-13 22:47:09,504 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:47:09,504 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:47:09,504 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 22:47:09,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:47:10,193 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 718 trivial. 0 not checked. [2019-10-13 22:47:10,193 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987101492] [2019-10-13 22:47:10,193 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520874329] [2019-10-13 22:47:10,194 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 22:47:17,799 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-13 22:47:17,799 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 22:47:17,826 INFO L256 TraceCheckSpWp]: Trace formula consists of 2139 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 22:47:17,845 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 22:47:17,874 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 22:47:18,025 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 670 trivial. 0 not checked. [2019-10-13 22:47:18,025 INFO L321 TraceCheckSpWp]: Computing backward predicates...