/usr/bin/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-fb55353 [2019-11-07 03:38:17,175 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 03:38:17,178 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 03:38:17,193 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 03:38:17,193 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 03:38:17,196 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 03:38:17,197 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 03:38:17,207 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 03:38:17,209 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 03:38:17,209 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 03:38:17,211 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 03:38:17,213 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 03:38:17,213 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 03:38:17,216 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 03:38:17,218 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 03:38:17,221 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 03:38:17,222 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 03:38:17,225 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 03:38:17,226 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 03:38:17,232 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 03:38:17,236 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 03:38:17,239 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 03:38:17,242 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 03:38:17,243 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 03:38:17,245 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 03:38:17,245 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 03:38:17,245 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 03:38:17,247 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 03:38:17,248 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 03:38:17,250 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 03:38:17,250 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 03:38:17,252 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 03:38:17,253 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 03:38:17,253 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 03:38:17,255 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 03:38:17,255 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 03:38:17,258 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 03:38:17,258 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 03:38:17,259 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 03:38:17,259 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 03:38:17,260 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 03:38:17,261 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 [2019-11-07 03:38:17,291 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 03:38:17,292 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 03:38:17,294 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 03:38:17,294 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 03:38:17,294 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 03:38:17,294 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 03:38:17,295 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 03:38:17,295 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 03:38:17,295 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 03:38:17,295 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 03:38:17,296 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 03:38:17,296 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 03:38:17,297 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 03:38:17,297 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 03:38:17,297 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 03:38:17,297 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 03:38:17,298 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 03:38:17,298 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 03:38:17,298 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 03:38:17,298 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 03:38:17,298 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 03:38:17,298 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 03:38:17,299 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 03:38:17,299 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 03:38:17,299 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 03:38:17,299 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 03:38:17,299 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 03:38:17,300 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 03:38:17,300 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 [2019-11-07 03:38:17,576 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 03:38:17,590 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 03:38:17,593 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 03:38:17,595 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 03:38:17,595 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 03:38:17,596 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i [2019-11-07 03:38:17,661 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78c6d034b/0a994528768344b28ea75b4f44cd1109/FLAG509585f1a [2019-11-07 03:38:18,404 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 03:38:18,405 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i [2019-11-07 03:38:18,443 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78c6d034b/0a994528768344b28ea75b4f44cd1109/FLAG509585f1a [2019-11-07 03:38:18,483 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78c6d034b/0a994528768344b28ea75b4f44cd1109 [2019-11-07 03:38:18,495 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 03:38:18,496 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 03:38:18,498 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 03:38:18,498 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 03:38:18,502 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 03:38:18,503 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:38:18" (1/1) ... [2019-11-07 03:38:18,506 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a36f65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:38:18, skipping insertion in model container [2019-11-07 03:38:18,507 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:38:18" (1/1) ... [2019-11-07 03:38:18,515 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 03:38:18,606 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 03:38:19,828 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 03:38:19,868 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 03:38:20,077 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 03:38:20,144 INFO L192 MainTranslator]: Completed translation [2019-11-07 03:38:20,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:38:20 WrapperNode [2019-11-07 03:38:20,145 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 03:38:20,145 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 03:38:20,146 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 03:38:20,146 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 03:38:20,161 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:38:20" (1/1) ... [2019-11-07 03:38:20,162 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:38:20" (1/1) ... [2019-11-07 03:38:20,222 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:38:20" (1/1) ... [2019-11-07 03:38:20,223 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:38:20" (1/1) ... [2019-11-07 03:38:20,275 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:38:20" (1/1) ... [2019-11-07 03:38:20,289 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:38:20" (1/1) ... [2019-11-07 03:38:20,299 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:38:20" (1/1) ... [2019-11-07 03:38:20,314 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 03:38:20,315 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 03:38:20,315 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 03:38:20,315 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 03:38:20,319 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:38:20" (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 [2019-11-07 03:38:20,399 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 03:38:20,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 03:38:20,400 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2019-11-07 03:38:20,400 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2019-11-07 03:38:20,400 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2019-11-07 03:38:20,401 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_clear_bit [2019-11-07 03:38:20,401 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2019-11-07 03:38:20,401 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2019-11-07 03:38:20,401 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2019-11-07 03:38:20,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2019-11-07 03:38:20,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2019-11-07 03:38:20,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2019-11-07 03:38:20,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2019-11-07 03:38:20,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2019-11-07 03:38:20,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_ptr [2019-11-07 03:38:20,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_ulong [2019-11-07 03:38:20,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2019-11-07 03:38:20,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2019-11-07 03:38:20,404 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2019-11-07 03:38:20,405 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_enter [2019-11-07 03:38:20,405 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_exit [2019-11-07 03:38:20,405 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_select [2019-11-07 03:38:20,405 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_inb [2019-11-07 03:38:20,406 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_outb [2019-11-07 03:38:20,406 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_inw [2019-11-07 03:38:20,406 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_outw [2019-11-07 03:38:20,406 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_update_timeout [2019-11-07 03:38:20,407 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_round_time [2019-11-07 03:38:20,407 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_keepalive [2019-11-07 03:38:20,407 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_start [2019-11-07 03:38:20,407 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_stop [2019-11-07 03:38:20,407 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_set_timeout [2019-11-07 03:38:20,408 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_get_status [2019-11-07 03:38:20,408 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_open [2019-11-07 03:38:20,408 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_release [2019-11-07 03:38:20,408 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_write [2019-11-07 03:38:20,408 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_ioctl [2019-11-07 03:38:20,408 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_notify_sys [2019-11-07 03:38:20,409 INFO L138 BoogieDeclarations]: Found implementation of procedure it87_wdt_init [2019-11-07 03:38:20,409 INFO L138 BoogieDeclarations]: Found implementation of procedure it87_wdt_exit [2019-11-07 03:38:20,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_file_operations_2 [2019-11-07 03:38:20,409 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 03:38:20,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv___module_get_5 [2019-11-07 03:38:20,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_nonseekable_open_6 [2019-11-07 03:38:20,410 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_misc_register_7 [2019-11-07 03:38:20,410 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_misc_deregister_8 [2019-11-07 03:38:20,410 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2019-11-07 03:38:20,410 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2019-11-07 03:38:20,410 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_err_ptr [2019-11-07 03:38:20,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_ptr_err [2019-11-07 03:38:20,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err_or_null [2019-11-07 03:38:20,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_get [2019-11-07 03:38:20,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_try_module_get [2019-11-07 03:38:20,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put [2019-11-07 03:38:20,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put_and_exit [2019-11-07 03:38:20,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_refcount [2019-11-07 03:38:20,412 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2019-11-07 03:38:20,412 INFO L138 BoogieDeclarations]: Found implementation of procedure __copy_to_user_overflow [2019-11-07 03:38:20,412 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_fault [2019-11-07 03:38:20,412 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2019-11-07 03:38:20,413 INFO L138 BoogieDeclarations]: Found implementation of procedure __request_region [2019-11-07 03:38:20,413 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_to_user [2019-11-07 03:38:20,413 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize [2019-11-07 03:38:20,413 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_deregister [2019-11-07 03:38:20,413 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_register [2019-11-07 03:38:20,413 INFO L138 BoogieDeclarations]: Found implementation of procedure no_llseek [2019-11-07 03:38:20,414 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2019-11-07 03:38:20,414 INFO L138 BoogieDeclarations]: Found implementation of procedure register_reboot_notifier [2019-11-07 03:38:20,414 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_reboot_notifier [2019-11-07 03:38:20,414 INFO L138 BoogieDeclarations]: Found implementation of procedure external_alloc [2019-11-07 03:38:20,414 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2019-11-07 03:38:20,415 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2019-11-07 03:38:20,415 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2019-11-07 03:38:20,415 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 03:38:20,415 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2019-11-07 03:38:20,415 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2019-11-07 03:38:20,416 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2019-11-07 03:38:20,416 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2019-11-07 03:38:20,416 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_clear_bit [2019-11-07 03:38:20,416 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2019-11-07 03:38:20,416 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 03:38:20,417 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2019-11-07 03:38:20,417 INFO L130 BoogieDeclarations]: Found specification of procedure __might_fault [2019-11-07 03:38:20,417 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2019-11-07 03:38:20,417 INFO L130 BoogieDeclarations]: Found specification of procedure __request_region [2019-11-07 03:38:20,417 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2019-11-07 03:38:20,417 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2019-11-07 03:38:20,418 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2019-11-07 03:38:20,418 INFO L130 BoogieDeclarations]: Found specification of procedure ldv___module_get_5 [2019-11-07 03:38:20,418 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_get [2019-11-07 03:38:20,418 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-07 03:38:20,418 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-07 03:38:20,419 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 03:38:20,419 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2019-11-07 03:38:20,419 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_pointer [2019-11-07 03:38:20,419 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-07 03:38:20,419 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2019-11-07 03:38:20,419 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-07 03:38:20,420 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2019-11-07 03:38:20,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2019-11-07 03:38:20,420 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2019-11-07 03:38:20,420 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2019-11-07 03:38:20,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2019-11-07 03:38:20,420 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2019-11-07 03:38:20,421 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_ptr [2019-11-07 03:38:20,421 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_ulong [2019-11-07 03:38:20,421 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2019-11-07 03:38:20,421 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_file_operations_2 [2019-11-07 03:38:20,421 INFO L130 BoogieDeclarations]: Found specification of procedure no_llseek [2019-11-07 03:38:20,422 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_nonseekable_open_6 [2019-11-07 03:38:20,422 INFO L130 BoogieDeclarations]: Found specification of procedure misc_register [2019-11-07 03:38:20,422 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_misc_register_7 [2019-11-07 03:38:20,422 INFO L130 BoogieDeclarations]: Found specification of procedure misc_deregister [2019-11-07 03:38:20,422 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_misc_deregister_8 [2019-11-07 03:38:20,422 INFO L130 BoogieDeclarations]: Found specification of procedure register_reboot_notifier [2019-11-07 03:38:20,423 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_reboot_notifier [2019-11-07 03:38:20,423 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_to_user [2019-11-07 03:38:20,423 INFO L130 BoogieDeclarations]: Found specification of procedure __copy_to_user_overflow [2019-11-07 03:38:20,423 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2019-11-07 03:38:20,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 03:38:20,423 INFO L130 BoogieDeclarations]: Found specification of procedure superio_enter [2019-11-07 03:38:20,424 INFO L130 BoogieDeclarations]: Found specification of procedure superio_exit [2019-11-07 03:38:20,424 INFO L130 BoogieDeclarations]: Found specification of procedure superio_select [2019-11-07 03:38:20,424 INFO L130 BoogieDeclarations]: Found specification of procedure superio_inb [2019-11-07 03:38:20,424 INFO L130 BoogieDeclarations]: Found specification of procedure superio_outb [2019-11-07 03:38:20,424 INFO L130 BoogieDeclarations]: Found specification of procedure superio_inw [2019-11-07 03:38:20,425 INFO L130 BoogieDeclarations]: Found specification of procedure superio_outw [2019-11-07 03:38:20,425 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_update_timeout [2019-11-07 03:38:20,425 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_round_time [2019-11-07 03:38:20,425 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_keepalive [2019-11-07 03:38:20,425 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_start [2019-11-07 03:38:20,425 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_stop [2019-11-07 03:38:20,426 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_set_timeout [2019-11-07 03:38:20,426 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_get_status [2019-11-07 03:38:20,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 03:38:20,426 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_open [2019-11-07 03:38:20,426 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_release [2019-11-07 03:38:20,427 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_write [2019-11-07 03:38:20,427 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_ioctl [2019-11-07 03:38:20,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-07 03:38:20,427 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-07 03:38:20,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 03:38:20,427 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_notify_sys [2019-11-07 03:38:20,428 INFO L130 BoogieDeclarations]: Found specification of procedure it87_wdt_init [2019-11-07 03:38:20,428 INFO L130 BoogieDeclarations]: Found specification of procedure it87_wdt_exit [2019-11-07 03:38:20,428 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize [2019-11-07 03:38:20,428 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2019-11-07 03:38:20,428 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 03:38:20,429 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2019-11-07 03:38:20,429 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2019-11-07 03:38:20,429 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_err_ptr [2019-11-07 03:38:20,429 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_ptr_err [2019-11-07 03:38:20,429 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err_or_null [2019-11-07 03:38:20,429 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_try_module_get [2019-11-07 03:38:20,430 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put [2019-11-07 03:38:20,430 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put_and_exit [2019-11-07 03:38:20,430 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_refcount [2019-11-07 03:38:20,430 INFO L130 BoogieDeclarations]: Found specification of procedure external_alloc [2019-11-07 03:38:20,430 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2019-11-07 03:38:20,430 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-07 03:38:20,431 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2019-11-07 03:38:20,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 03:38:20,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-07 03:38:20,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2019-11-07 03:38:20,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-07 03:38:20,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 03:38:21,804 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2019-11-07 03:38:21,818 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_module_put_and_exitFINAL: assume true; [2019-11-07 03:38:24,685 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 03:38:24,685 INFO L284 CfgBuilder]: Removed 0 assume(true) statements. [2019-11-07 03:38:24,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:38:24 BoogieIcfgContainer [2019-11-07 03:38:24,687 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 03:38:24,690 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 03:38:24,690 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 03:38:24,693 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 03:38:24,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 03:38:18" (1/3) ... [2019-11-07 03:38:24,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e48710a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:38:24, skipping insertion in model container [2019-11-07 03:38:24,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:38:20" (2/3) ... [2019-11-07 03:38:24,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e48710a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:38:24, skipping insertion in model container [2019-11-07 03:38:24,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:38:24" (3/3) ... [2019-11-07 03:38:24,698 INFO L109 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i [2019-11-07 03:38:24,710 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 03:38:24,722 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 03:38:24,736 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 03:38:24,782 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 03:38:24,783 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 03:38:24,783 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 03:38:24,783 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 03:38:24,783 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 03:38:24,783 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 03:38:24,783 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 03:38:24,784 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 03:38:24,830 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states. [2019-11-07 03:38:24,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-11-07 03:38:24,862 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:38:24,864 INFO L410 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] [2019-11-07 03:38:24,869 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:38:24,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:38:24,875 INFO L82 PathProgramCache]: Analyzing trace with hash -2123511353, now seen corresponding path program 1 times [2019-11-07 03:38:24,886 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:38:24,886 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669850575] [2019-11-07 03:38:24,886 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:38:25,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:38:25,687 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2019-11-07 03:38:25,688 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669850575] [2019-11-07 03:38:25,689 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 03:38:25,689 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 03:38:25,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094336416] [2019-11-07 03:38:25,695 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 03:38:25,695 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:38:25,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 03:38:25,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 03:38:25,712 INFO L87 Difference]: Start difference. First operand 580 states. Second operand 3 states. [2019-11-07 03:38:25,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:38:25,854 INFO L93 Difference]: Finished difference Result 1107 states and 1613 transitions. [2019-11-07 03:38:25,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 03:38:25,859 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 126 [2019-11-07 03:38:25,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:38:25,898 INFO L225 Difference]: With dead ends: 1107 [2019-11-07 03:38:25,899 INFO L226 Difference]: Without dead ends: 1036 [2019-11-07 03:38:25,906 INFO L630 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 [2019-11-07 03:38:25,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2019-11-07 03:38:26,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 1032. [2019-11-07 03:38:26,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1032 states. [2019-11-07 03:38:26,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1498 transitions. [2019-11-07 03:38:26,092 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1498 transitions. Word has length 126 [2019-11-07 03:38:26,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:38:26,093 INFO L462 AbstractCegarLoop]: Abstraction has 1032 states and 1498 transitions. [2019-11-07 03:38:26,093 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 03:38:26,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1498 transitions. [2019-11-07 03:38:26,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2019-11-07 03:38:26,102 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:38:26,102 INFO L410 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] [2019-11-07 03:38:26,102 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:38:26,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:38:26,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1695427865, now seen corresponding path program 1 times [2019-11-07 03:38:26,103 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:38:26,103 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146024076] [2019-11-07 03:38:26,104 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:38:26,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:38:26,487 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-11-07 03:38:26,491 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146024076] [2019-11-07 03:38:26,491 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 03:38:26,491 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 03:38:26,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435686012] [2019-11-07 03:38:26,495 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 03:38:26,495 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:38:26,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 03:38:26,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 03:38:26,496 INFO L87 Difference]: Start difference. First operand 1032 states and 1498 transitions. Second operand 3 states. [2019-11-07 03:38:26,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:38:26,657 INFO L93 Difference]: Finished difference Result 2456 states and 3572 transitions. [2019-11-07 03:38:26,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 03:38:26,657 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 185 [2019-11-07 03:38:26,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:38:26,676 INFO L225 Difference]: With dead ends: 2456 [2019-11-07 03:38:26,677 INFO L226 Difference]: Without dead ends: 1459 [2019-11-07 03:38:26,686 INFO L630 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 [2019-11-07 03:38:26,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1459 states. [2019-11-07 03:38:26,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1459 to 1436. [2019-11-07 03:38:26,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1436 states. [2019-11-07 03:38:26,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 2092 transitions. [2019-11-07 03:38:26,825 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 2092 transitions. Word has length 185 [2019-11-07 03:38:26,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:38:26,826 INFO L462 AbstractCegarLoop]: Abstraction has 1436 states and 2092 transitions. [2019-11-07 03:38:26,826 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 03:38:26,831 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 2092 transitions. [2019-11-07 03:38:26,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2019-11-07 03:38:26,853 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:38:26,853 INFO L410 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] [2019-11-07 03:38:26,854 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:38:26,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:38:26,854 INFO L82 PathProgramCache]: Analyzing trace with hash -356778446, now seen corresponding path program 1 times [2019-11-07 03:38:26,854 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:38:26,855 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625029265] [2019-11-07 03:38:26,855 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:38:26,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:38:27,462 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 449 trivial. 0 not checked. [2019-11-07 03:38:27,463 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625029265] [2019-11-07 03:38:27,463 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525633080] [2019-11-07 03:38:27,464 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 [2019-11-07 03:38:28,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:38:28,076 INFO L256 TraceCheckSpWp]: Trace formula consists of 2638 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 03:38:28,169 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 03:38:28,312 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 162 proven. 0 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2019-11-07 03:38:28,312 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 03:38:28,953 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 452 trivial. 0 not checked. [2019-11-07 03:38:28,953 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 03:38:28,954 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 4] total 7 [2019-11-07 03:38:28,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335004307] [2019-11-07 03:38:28,955 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 03:38:28,955 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:38:28,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 03:38:28,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-11-07 03:38:28,956 INFO L87 Difference]: Start difference. First operand 1436 states and 2092 transitions. Second operand 3 states. [2019-11-07 03:38:29,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:38:29,029 INFO L93 Difference]: Finished difference Result 2831 states and 4140 transitions. [2019-11-07 03:38:29,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 03:38:29,030 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 358 [2019-11-07 03:38:29,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:38:29,040 INFO L225 Difference]: With dead ends: 2831 [2019-11-07 03:38:29,041 INFO L226 Difference]: Without dead ends: 1436 [2019-11-07 03:38:29,047 INFO L630 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 [2019-11-07 03:38:29,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1436 states. [2019-11-07 03:38:29,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1436 to 1436. [2019-11-07 03:38:29,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1436 states. [2019-11-07 03:38:29,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 2088 transitions. [2019-11-07 03:38:29,126 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 2088 transitions. Word has length 358 [2019-11-07 03:38:29,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:38:29,127 INFO L462 AbstractCegarLoop]: Abstraction has 1436 states and 2088 transitions. [2019-11-07 03:38:29,127 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 03:38:29,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 2088 transitions. [2019-11-07 03:38:29,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2019-11-07 03:38:29,139 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:38:29,139 INFO L410 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] [2019-11-07 03:38:29,352 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 03:38:29,352 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:38:29,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:38:29,353 INFO L82 PathProgramCache]: Analyzing trace with hash -2013443434, now seen corresponding path program 1 times [2019-11-07 03:38:29,353 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:38:29,353 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654756559] [2019-11-07 03:38:29,354 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:38:29,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:38:29,819 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 451 trivial. 0 not checked. [2019-11-07 03:38:29,819 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654756559] [2019-11-07 03:38:29,820 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890600678] [2019-11-07 03:38:29,820 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 [2019-11-07 03:38:30,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:38:30,450 INFO L256 TraceCheckSpWp]: Trace formula consists of 2660 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 03:38:30,464 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 03:38:30,563 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-07 03:38:30,564 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 03:38:31,125 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2019-11-07 03:38:31,125 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 03:38:31,126 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [5] total 7 [2019-11-07 03:38:31,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658464325] [2019-11-07 03:38:31,127 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 03:38:31,128 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:38:31,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 03:38:31,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-11-07 03:38:31,129 INFO L87 Difference]: Start difference. First operand 1436 states and 2088 transitions. Second operand 4 states. [2019-11-07 03:38:32,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:38:32,265 INFO L93 Difference]: Finished difference Result 2831 states and 4129 transitions. [2019-11-07 03:38:32,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 03:38:32,265 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 363 [2019-11-07 03:38:32,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:38:32,276 INFO L225 Difference]: With dead ends: 2831 [2019-11-07 03:38:32,276 INFO L226 Difference]: Without dead ends: 1436 [2019-11-07 03:38:32,284 INFO L630 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 [2019-11-07 03:38:32,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1436 states. [2019-11-07 03:38:32,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1436 to 1436. [2019-11-07 03:38:32,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1436 states. [2019-11-07 03:38:32,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 2086 transitions. [2019-11-07 03:38:32,368 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 2086 transitions. Word has length 363 [2019-11-07 03:38:32,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:38:32,369 INFO L462 AbstractCegarLoop]: Abstraction has 1436 states and 2086 transitions. [2019-11-07 03:38:32,369 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 03:38:32,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 2086 transitions. [2019-11-07 03:38:32,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2019-11-07 03:38:32,377 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:38:32,378 INFO L410 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] [2019-11-07 03:38:32,585 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 03:38:32,586 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:38:32,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:38:32,586 INFO L82 PathProgramCache]: Analyzing trace with hash -118476032, now seen corresponding path program 1 times [2019-11-07 03:38:32,587 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:38:32,587 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478545412] [2019-11-07 03:38:32,587 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:38:32,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:38:33,002 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2019-11-07 03:38:33,002 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478545412] [2019-11-07 03:38:33,003 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267330966] [2019-11-07 03:38:33,004 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 [2019-11-07 03:38:33,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:38:33,631 INFO L256 TraceCheckSpWp]: Trace formula consists of 2683 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 03:38:33,648 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 03:38:33,792 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-11-07 03:38:33,792 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 03:38:34,815 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked. [2019-11-07 03:38:34,816 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 03:38:34,818 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5] total 9 [2019-11-07 03:38:34,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365063139] [2019-11-07 03:38:34,826 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 03:38:34,827 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:38:34,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 03:38:34,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-11-07 03:38:34,828 INFO L87 Difference]: Start difference. First operand 1436 states and 2086 transitions. Second operand 6 states. [2019-11-07 03:38:35,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:38:35,467 INFO L93 Difference]: Finished difference Result 2606 states and 3739 transitions. [2019-11-07 03:38:35,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 03:38:35,468 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 368 [2019-11-07 03:38:35,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:38:35,476 INFO L225 Difference]: With dead ends: 2606 [2019-11-07 03:38:35,477 INFO L226 Difference]: Without dead ends: 1115 [2019-11-07 03:38:35,486 INFO L630 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 [2019-11-07 03:38:35,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2019-11-07 03:38:35,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 1115. [2019-11-07 03:38:35,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1115 states. [2019-11-07 03:38:35,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1115 states to 1115 states and 1555 transitions. [2019-11-07 03:38:35,561 INFO L78 Accepts]: Start accepts. Automaton has 1115 states and 1555 transitions. Word has length 368 [2019-11-07 03:38:35,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:38:35,562 INFO L462 AbstractCegarLoop]: Abstraction has 1115 states and 1555 transitions. [2019-11-07 03:38:35,562 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 03:38:35,562 INFO L276 IsEmpty]: Start isEmpty. Operand 1115 states and 1555 transitions. [2019-11-07 03:38:35,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2019-11-07 03:38:35,569 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:38:35,570 INFO L410 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] [2019-11-07 03:38:35,778 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 03:38:35,778 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:38:35,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:38:35,779 INFO L82 PathProgramCache]: Analyzing trace with hash 603448734, now seen corresponding path program 1 times [2019-11-07 03:38:35,779 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:38:35,779 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959430703] [2019-11-07 03:38:35,779 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:38:35,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:38:36,169 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 460 trivial. 0 not checked. [2019-11-07 03:38:36,170 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959430703] [2019-11-07 03:38:36,170 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 03:38:36,170 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 03:38:36,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317565578] [2019-11-07 03:38:36,171 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 03:38:36,172 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:38:36,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 03:38:36,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-07 03:38:36,173 INFO L87 Difference]: Start difference. First operand 1115 states and 1555 transitions. Second operand 5 states. [2019-11-07 03:38:37,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:38:37,577 INFO L93 Difference]: Finished difference Result 2163 states and 3037 transitions. [2019-11-07 03:38:37,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 03:38:37,578 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 386 [2019-11-07 03:38:37,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:38:37,585 INFO L225 Difference]: With dead ends: 2163 [2019-11-07 03:38:37,585 INFO L226 Difference]: Without dead ends: 1193 [2019-11-07 03:38:37,589 INFO L630 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 [2019-11-07 03:38:37,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1193 states. [2019-11-07 03:38:37,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1193 to 1174. [2019-11-07 03:38:37,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1174 states. [2019-11-07 03:38:37,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 1653 transitions. [2019-11-07 03:38:37,653 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 1653 transitions. Word has length 386 [2019-11-07 03:38:37,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:38:37,653 INFO L462 AbstractCegarLoop]: Abstraction has 1174 states and 1653 transitions. [2019-11-07 03:38:37,654 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 03:38:37,654 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 1653 transitions. [2019-11-07 03:38:37,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2019-11-07 03:38:37,663 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:38:37,663 INFO L410 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] [2019-11-07 03:38:37,664 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:38:37,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:38:37,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1872226297, now seen corresponding path program 1 times [2019-11-07 03:38:37,665 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:38:37,665 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449631266] [2019-11-07 03:38:37,665 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:38:37,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:38:38,006 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 460 trivial. 0 not checked. [2019-11-07 03:38:38,007 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449631266] [2019-11-07 03:38:38,007 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 03:38:38,007 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 03:38:38,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920768393] [2019-11-07 03:38:38,009 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 03:38:38,009 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:38:38,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 03:38:38,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 03:38:38,010 INFO L87 Difference]: Start difference. First operand 1174 states and 1653 transitions. Second operand 5 states. [2019-11-07 03:38:38,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:38:38,098 INFO L93 Difference]: Finished difference Result 2012 states and 2840 transitions. [2019-11-07 03:38:38,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 03:38:38,098 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 389 [2019-11-07 03:38:38,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:38:38,107 INFO L225 Difference]: With dead ends: 2012 [2019-11-07 03:38:38,107 INFO L226 Difference]: Without dead ends: 1186 [2019-11-07 03:38:38,111 INFO L630 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 [2019-11-07 03:38:38,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2019-11-07 03:38:38,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 1182. [2019-11-07 03:38:38,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1182 states. [2019-11-07 03:38:38,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 1663 transitions. [2019-11-07 03:38:38,175 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 1663 transitions. Word has length 389 [2019-11-07 03:38:38,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:38:38,176 INFO L462 AbstractCegarLoop]: Abstraction has 1182 states and 1663 transitions. [2019-11-07 03:38:38,176 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 03:38:38,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 1663 transitions. [2019-11-07 03:38:38,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2019-11-07 03:38:38,183 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:38:38,184 INFO L410 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] [2019-11-07 03:38:38,184 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:38:38,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:38:38,185 INFO L82 PathProgramCache]: Analyzing trace with hash 719521026, now seen corresponding path program 1 times [2019-11-07 03:38:38,185 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:38:38,185 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134222175] [2019-11-07 03:38:38,185 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:38:38,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:38:38,731 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked. [2019-11-07 03:38:38,731 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134222175] [2019-11-07 03:38:38,732 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11747945] [2019-11-07 03:38:38,732 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 [2019-11-07 03:38:39,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:38:39,491 INFO L256 TraceCheckSpWp]: Trace formula consists of 2747 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 03:38:39,510 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 03:38:39,632 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2019-11-07 03:38:39,632 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 03:38:40,287 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 460 trivial. 0 not checked. [2019-11-07 03:38:40,288 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 03:38:40,289 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 10 [2019-11-07 03:38:40,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489865821] [2019-11-07 03:38:40,290 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 03:38:40,291 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:38:40,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 03:38:40,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-11-07 03:38:40,299 INFO L87 Difference]: Start difference. First operand 1182 states and 1663 transitions. Second operand 5 states. [2019-11-07 03:38:40,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:38:40,409 INFO L93 Difference]: Finished difference Result 2287 states and 3232 transitions. [2019-11-07 03:38:40,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 03:38:40,410 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 395 [2019-11-07 03:38:40,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:38:40,422 INFO L225 Difference]: With dead ends: 2287 [2019-11-07 03:38:40,422 INFO L226 Difference]: Without dead ends: 1190 [2019-11-07 03:38:40,429 INFO L630 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 [2019-11-07 03:38:40,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2019-11-07 03:38:40,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 1184. [2019-11-07 03:38:40,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1184 states. [2019-11-07 03:38:40,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 1667 transitions. [2019-11-07 03:38:40,510 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 1667 transitions. Word has length 395 [2019-11-07 03:38:40,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:38:40,511 INFO L462 AbstractCegarLoop]: Abstraction has 1184 states and 1667 transitions. [2019-11-07 03:38:40,511 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 03:38:40,512 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 1667 transitions. [2019-11-07 03:38:40,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2019-11-07 03:38:40,525 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:38:40,526 INFO L410 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] [2019-11-07 03:38:40,745 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 03:38:40,747 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:38:40,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:38:40,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1401591383, now seen corresponding path program 1 times [2019-11-07 03:38:40,748 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:38:40,748 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082479237] [2019-11-07 03:38:40,749 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:38:40,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:38:41,305 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2019-11-07 03:38:41,305 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082479237] [2019-11-07 03:38:41,306 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789683783] [2019-11-07 03:38:41,306 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 [2019-11-07 03:38:42,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:38:42,039 INFO L256 TraceCheckSpWp]: Trace formula consists of 2790 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 03:38:42,051 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 03:38:42,155 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 259 proven. 0 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2019-11-07 03:38:42,155 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 03:38:42,832 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2019-11-07 03:38:42,832 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 03:38:42,833 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2019-11-07 03:38:42,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680779024] [2019-11-07 03:38:42,834 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 03:38:42,834 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:38:42,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 03:38:42,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-07 03:38:42,835 INFO L87 Difference]: Start difference. First operand 1184 states and 1667 transitions. Second operand 5 states. [2019-11-07 03:38:42,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:38:42,911 INFO L93 Difference]: Finished difference Result 2252 states and 3181 transitions. [2019-11-07 03:38:42,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 03:38:42,912 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 408 [2019-11-07 03:38:42,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:38:42,920 INFO L225 Difference]: With dead ends: 2252 [2019-11-07 03:38:42,920 INFO L226 Difference]: Without dead ends: 1190 [2019-11-07 03:38:42,924 INFO L630 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 [2019-11-07 03:38:42,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2019-11-07 03:38:42,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 1184. [2019-11-07 03:38:42,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1184 states. [2019-11-07 03:38:42,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 1665 transitions. [2019-11-07 03:38:42,982 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 1665 transitions. Word has length 408 [2019-11-07 03:38:42,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:38:42,983 INFO L462 AbstractCegarLoop]: Abstraction has 1184 states and 1665 transitions. [2019-11-07 03:38:42,983 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 03:38:42,983 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 1665 transitions. [2019-11-07 03:38:42,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2019-11-07 03:38:42,992 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:38:42,992 INFO L410 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] [2019-11-07 03:38:43,201 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 03:38:43,201 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:38:43,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:38:43,202 INFO L82 PathProgramCache]: Analyzing trace with hash -558461706, now seen corresponding path program 2 times [2019-11-07 03:38:43,203 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:38:43,203 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499206076] [2019-11-07 03:38:43,203 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:38:43,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:38:43,797 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 718 trivial. 0 not checked. [2019-11-07 03:38:43,798 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499206076] [2019-11-07 03:38:43,798 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580319637] [2019-11-07 03:38:43,798 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