java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:55:49,953 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:55:49,956 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:55:49,974 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:55:49,974 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:55:49,976 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:55:49,978 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:55:49,986 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:55:49,990 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:55:49,994 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:55:49,995 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:55:49,997 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:55:49,997 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:55:49,999 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:55:50,001 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:55:50,002 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:55:50,004 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:55:50,005 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:55:50,007 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:55:50,011 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:55:50,015 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:55:50,017 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:55:50,019 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:55:50,020 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:55:50,022 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 20:55:50,022 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 20:55:50,022 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 20:55:50,024 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 20:55:50,025 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 20:55:50,026 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 20:55:50,027 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:55:50,027 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:55:50,028 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:55:50,029 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:55:50,030 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:55:50,030 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:55:50,031 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:55:50,031 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:55:50,031 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:55:50,032 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:55:50,033 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:55:50,034 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 20:55:50,049 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:55:50,049 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:55:50,050 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:55:50,051 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:55:50,051 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:55:50,051 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:55:50,051 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:55:50,051 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:55:50,052 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:55:50,052 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:55:50,052 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:55:50,052 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:55:50,052 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:55:50,052 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:55:50,053 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:55:50,053 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:55:50,053 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:55:50,053 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:55:50,053 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:55:50,054 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:55:50,054 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:55:50,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:55:50,054 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:55:50,054 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:55:50,055 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:55:50,055 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:55:50,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:55:50,055 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:55:50,055 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-13 20:55:50,353 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:55:50,376 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:55:50,379 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:55:50,380 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:55:50,381 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:55:50,381 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i [2019-10-13 20:55:50,452 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/992498503/29545653eb44416eaa8a04aa0aca1d12/FLAGecb143c9b [2019-10-13 20:55:51,210 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:55:51,210 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i [2019-10-13 20:55:51,243 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/992498503/29545653eb44416eaa8a04aa0aca1d12/FLAGecb143c9b [2019-10-13 20:55:51,310 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/992498503/29545653eb44416eaa8a04aa0aca1d12 [2019-10-13 20:55:51,320 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:55:51,322 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:55:51,323 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:55:51,323 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:55:51,326 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:55:51,327 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:55:51" (1/1) ... [2019-10-13 20:55:51,330 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@573a9846 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:55:51, skipping insertion in model container [2019-10-13 20:55:51,331 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:55:51" (1/1) ... [2019-10-13 20:55:51,338 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:55:51,439 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:55:52,494 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:55:52,535 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:55:52,755 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:55:52,840 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:55:52,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:55:52 WrapperNode [2019-10-13 20:55:52,841 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:55:52,842 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:55:52,842 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:55:52,842 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:55:52,857 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:55:52" (1/1) ... [2019-10-13 20:55:52,857 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:55:52" (1/1) ... [2019-10-13 20:55:52,895 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:55:52" (1/1) ... [2019-10-13 20:55:52,896 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:55:52" (1/1) ... [2019-10-13 20:55:52,952 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:55:52" (1/1) ... [2019-10-13 20:55:52,977 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:55:52" (1/1) ... [2019-10-13 20:55:52,987 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:55:52" (1/1) ... [2019-10-13 20:55:52,999 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:55:52,999 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:55:53,000 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:55:53,000 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:55:53,001 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:55:52" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:55:53,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:55:53,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:55:53,061 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2019-10-13 20:55:53,061 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2019-10-13 20:55:53,061 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2019-10-13 20:55:53,061 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_clear_bit [2019-10-13 20:55:53,061 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2019-10-13 20:55:53,062 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2019-10-13 20:55:53,062 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2019-10-13 20:55:53,062 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2019-10-13 20:55:53,062 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2019-10-13 20:55:53,063 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2019-10-13 20:55:53,063 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2019-10-13 20:55:53,063 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2019-10-13 20:55:53,063 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_ptr [2019-10-13 20:55:53,063 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_ulong [2019-10-13 20:55:53,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2019-10-13 20:55:53,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2019-10-13 20:55:53,064 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2019-10-13 20:55:53,064 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_enter [2019-10-13 20:55:53,065 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_exit [2019-10-13 20:55:53,065 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_select [2019-10-13 20:55:53,065 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_inb [2019-10-13 20:55:53,065 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_outb [2019-10-13 20:55:53,065 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_inw [2019-10-13 20:55:53,066 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_outw [2019-10-13 20:55:53,066 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_update_timeout [2019-10-13 20:55:53,066 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_round_time [2019-10-13 20:55:53,066 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_keepalive [2019-10-13 20:55:53,066 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_start [2019-10-13 20:55:53,066 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_stop [2019-10-13 20:55:53,067 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_set_timeout [2019-10-13 20:55:53,067 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_get_status [2019-10-13 20:55:53,067 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_open [2019-10-13 20:55:53,067 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_release [2019-10-13 20:55:53,067 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_write [2019-10-13 20:55:53,068 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_ioctl [2019-10-13 20:55:53,068 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_notify_sys [2019-10-13 20:55:53,068 INFO L138 BoogieDeclarations]: Found implementation of procedure it87_wdt_init [2019-10-13 20:55:53,068 INFO L138 BoogieDeclarations]: Found implementation of procedure it87_wdt_exit [2019-10-13 20:55:53,068 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_file_operations_2 [2019-10-13 20:55:53,068 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:55:53,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv___module_get_5 [2019-10-13 20:55:53,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_nonseekable_open_6 [2019-10-13 20:55:53,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_misc_register_7 [2019-10-13 20:55:53,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_misc_deregister_8 [2019-10-13 20:55:53,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2019-10-13 20:55:53,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2019-10-13 20:55:53,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_err_ptr [2019-10-13 20:55:53,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_ptr_err [2019-10-13 20:55:53,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err_or_null [2019-10-13 20:55:53,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_get [2019-10-13 20:55:53,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_try_module_get [2019-10-13 20:55:53,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put [2019-10-13 20:55:53,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put_and_exit [2019-10-13 20:55:53,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_refcount [2019-10-13 20:55:53,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2019-10-13 20:55:53,071 INFO L138 BoogieDeclarations]: Found implementation of procedure __copy_to_user_overflow [2019-10-13 20:55:53,071 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_fault [2019-10-13 20:55:53,071 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2019-10-13 20:55:53,071 INFO L138 BoogieDeclarations]: Found implementation of procedure __request_region [2019-10-13 20:55:53,071 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_to_user [2019-10-13 20:55:53,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize [2019-10-13 20:55:53,072 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_deregister [2019-10-13 20:55:53,072 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_register [2019-10-13 20:55:53,072 INFO L138 BoogieDeclarations]: Found implementation of procedure no_llseek [2019-10-13 20:55:53,072 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2019-10-13 20:55:53,072 INFO L138 BoogieDeclarations]: Found implementation of procedure register_reboot_notifier [2019-10-13 20:55:53,073 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_reboot_notifier [2019-10-13 20:55:53,073 INFO L138 BoogieDeclarations]: Found implementation of procedure external_alloc [2019-10-13 20:55:53,073 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2019-10-13 20:55:53,073 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2019-10-13 20:55:53,073 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2019-10-13 20:55:53,074 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:55:53,074 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2019-10-13 20:55:53,074 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2019-10-13 20:55:53,074 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2019-10-13 20:55:53,074 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2019-10-13 20:55:53,075 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_clear_bit [2019-10-13 20:55:53,075 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2019-10-13 20:55:53,075 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 20:55:53,075 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2019-10-13 20:55:53,075 INFO L130 BoogieDeclarations]: Found specification of procedure __might_fault [2019-10-13 20:55:53,075 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2019-10-13 20:55:53,076 INFO L130 BoogieDeclarations]: Found specification of procedure __request_region [2019-10-13 20:55:53,076 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2019-10-13 20:55:53,076 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2019-10-13 20:55:53,076 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2019-10-13 20:55:53,076 INFO L130 BoogieDeclarations]: Found specification of procedure ldv___module_get_5 [2019-10-13 20:55:53,077 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_get [2019-10-13 20:55:53,077 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 20:55:53,077 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-10-13 20:55:53,077 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:55:53,077 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2019-10-13 20:55:53,077 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_pointer [2019-10-13 20:55:53,078 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-13 20:55:53,078 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2019-10-13 20:55:53,078 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 20:55:53,078 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2019-10-13 20:55:53,078 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2019-10-13 20:55:53,079 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2019-10-13 20:55:53,079 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2019-10-13 20:55:53,079 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2019-10-13 20:55:53,079 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2019-10-13 20:55:53,079 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_ptr [2019-10-13 20:55:53,079 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_ulong [2019-10-13 20:55:53,080 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2019-10-13 20:55:53,080 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_file_operations_2 [2019-10-13 20:55:53,080 INFO L130 BoogieDeclarations]: Found specification of procedure no_llseek [2019-10-13 20:55:53,080 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_nonseekable_open_6 [2019-10-13 20:55:53,080 INFO L130 BoogieDeclarations]: Found specification of procedure misc_register [2019-10-13 20:55:53,080 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_misc_register_7 [2019-10-13 20:55:53,081 INFO L130 BoogieDeclarations]: Found specification of procedure misc_deregister [2019-10-13 20:55:53,081 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_misc_deregister_8 [2019-10-13 20:55:53,081 INFO L130 BoogieDeclarations]: Found specification of procedure register_reboot_notifier [2019-10-13 20:55:53,081 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_reboot_notifier [2019-10-13 20:55:53,081 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_to_user [2019-10-13 20:55:53,081 INFO L130 BoogieDeclarations]: Found specification of procedure __copy_to_user_overflow [2019-10-13 20:55:53,082 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2019-10-13 20:55:53,082 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 20:55:53,082 INFO L130 BoogieDeclarations]: Found specification of procedure superio_enter [2019-10-13 20:55:53,082 INFO L130 BoogieDeclarations]: Found specification of procedure superio_exit [2019-10-13 20:55:53,082 INFO L130 BoogieDeclarations]: Found specification of procedure superio_select [2019-10-13 20:55:53,083 INFO L130 BoogieDeclarations]: Found specification of procedure superio_inb [2019-10-13 20:55:53,083 INFO L130 BoogieDeclarations]: Found specification of procedure superio_outb [2019-10-13 20:55:53,083 INFO L130 BoogieDeclarations]: Found specification of procedure superio_inw [2019-10-13 20:55:53,083 INFO L130 BoogieDeclarations]: Found specification of procedure superio_outw [2019-10-13 20:55:53,083 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_update_timeout [2019-10-13 20:55:53,083 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_round_time [2019-10-13 20:55:53,084 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_keepalive [2019-10-13 20:55:53,084 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_start [2019-10-13 20:55:53,084 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_stop [2019-10-13 20:55:53,084 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_set_timeout [2019-10-13 20:55:53,084 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_get_status [2019-10-13 20:55:53,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 20:55:53,085 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_open [2019-10-13 20:55:53,085 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_release [2019-10-13 20:55:53,085 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_write [2019-10-13 20:55:53,085 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_ioctl [2019-10-13 20:55:53,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 20:55:53,086 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 20:55:53,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 20:55:53,086 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_notify_sys [2019-10-13 20:55:53,086 INFO L130 BoogieDeclarations]: Found specification of procedure it87_wdt_init [2019-10-13 20:55:53,086 INFO L130 BoogieDeclarations]: Found specification of procedure it87_wdt_exit [2019-10-13 20:55:53,087 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize [2019-10-13 20:55:53,087 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2019-10-13 20:55:53,087 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:55:53,087 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2019-10-13 20:55:53,087 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2019-10-13 20:55:53,087 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_err_ptr [2019-10-13 20:55:53,088 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_ptr_err [2019-10-13 20:55:53,088 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err_or_null [2019-10-13 20:55:53,088 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_try_module_get [2019-10-13 20:55:53,088 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put [2019-10-13 20:55:53,088 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put_and_exit [2019-10-13 20:55:53,088 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_refcount [2019-10-13 20:55:53,089 INFO L130 BoogieDeclarations]: Found specification of procedure external_alloc [2019-10-13 20:55:53,089 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2019-10-13 20:55:53,089 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 20:55:53,089 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2019-10-13 20:55:53,089 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:55:53,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 20:55:53,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2019-10-13 20:55:53,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-10-13 20:55:53,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:55:54,207 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2019-10-13 20:55:54,216 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_module_put_and_exitFINAL: assume true; [2019-10-13 20:55:55,630 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:55:55,630 INFO L284 CfgBuilder]: Removed 0 assume(true) statements. [2019-10-13 20:55:55,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:55:55 BoogieIcfgContainer [2019-10-13 20:55:55,632 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:55:55,634 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:55:55,634 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:55:55,637 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:55:55,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:55:51" (1/3) ... [2019-10-13 20:55:55,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@580c1c7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:55:55, skipping insertion in model container [2019-10-13 20:55:55,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:55:52" (2/3) ... [2019-10-13 20:55:55,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@580c1c7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:55:55, skipping insertion in model container [2019-10-13 20:55:55,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:55:55" (3/3) ... [2019-10-13 20:55:55,642 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 20:55:55,652 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:55:55,664 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:55:55,676 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:55:55,713 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:55:55,714 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:55:55,714 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:55:55,714 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:55:55,714 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:55:55,714 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:55:55,714 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:55:55,714 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:55:55,758 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states. [2019-10-13 20:55:55,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-10-13 20:55:55,793 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:55:55,795 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:55:55,797 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:55:55,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:55:55,803 INFO L82 PathProgramCache]: Analyzing trace with hash -960615019, now seen corresponding path program 1 times [2019-10-13 20:55:55,812 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:55:55,813 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707696045] [2019-10-13 20:55:55,813 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:55:55,813 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:55:55,813 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:55:56,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:55:56,432 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2019-10-13 20:55:56,433 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707696045] [2019-10-13 20:55:56,434 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:55:56,434 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:55:56,435 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526752371] [2019-10-13 20:55:56,440 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:55:56,441 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:55:56,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:55:56,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:55:56,504 INFO L87 Difference]: Start difference. First operand 665 states. Second operand 3 states. [2019-10-13 20:55:56,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:55:56,679 INFO L93 Difference]: Finished difference Result 683 states and 977 transitions. [2019-10-13 20:55:56,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:55:56,681 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 150 [2019-10-13 20:55:56,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:55:56,721 INFO L225 Difference]: With dead ends: 683 [2019-10-13 20:55:56,721 INFO L226 Difference]: Without dead ends: 650 [2019-10-13 20:55:56,727 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:55:56,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2019-10-13 20:55:56,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 645. [2019-10-13 20:55:56,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 645 states. [2019-10-13 20:55:56,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 929 transitions. [2019-10-13 20:55:56,878 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 929 transitions. Word has length 150 [2019-10-13 20:55:56,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:55:56,886 INFO L462 AbstractCegarLoop]: Abstraction has 645 states and 929 transitions. [2019-10-13 20:55:56,886 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:55:56,886 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 929 transitions. [2019-10-13 20:55:56,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-10-13 20:55:56,893 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:55:56,893 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:55:56,894 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:55:56,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:55:56,894 INFO L82 PathProgramCache]: Analyzing trace with hash -903356717, now seen corresponding path program 1 times [2019-10-13 20:55:56,894 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:55:56,895 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800567744] [2019-10-13 20:55:56,895 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:55:56,895 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:55:56,895 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:55:57,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:55:57,204 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2019-10-13 20:55:57,204 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800567744] [2019-10-13 20:55:57,204 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:55:57,205 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:55:57,205 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083923330] [2019-10-13 20:55:57,207 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:55:57,207 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:55:57,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:55:57,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:55:57,208 INFO L87 Difference]: Start difference. First operand 645 states and 929 transitions. Second operand 3 states. [2019-10-13 20:55:57,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:55:57,283 INFO L93 Difference]: Finished difference Result 1252 states and 1813 transitions. [2019-10-13 20:55:57,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:55:57,284 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 150 [2019-10-13 20:55:57,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:55:57,298 INFO L225 Difference]: With dead ends: 1252 [2019-10-13 20:55:57,298 INFO L226 Difference]: Without dead ends: 1202 [2019-10-13 20:55:57,303 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:55:57,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1202 states. [2019-10-13 20:55:57,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1202 to 1201. [2019-10-13 20:55:57,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1201 states. [2019-10-13 20:55:57,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 1737 transitions. [2019-10-13 20:55:57,427 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 1737 transitions. Word has length 150 [2019-10-13 20:55:57,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:55:57,430 INFO L462 AbstractCegarLoop]: Abstraction has 1201 states and 1737 transitions. [2019-10-13 20:55:57,430 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:55:57,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 1737 transitions. [2019-10-13 20:55:57,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2019-10-13 20:55:57,448 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:55:57,449 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 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] [2019-10-13 20:55:57,449 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:55:57,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:55:57,450 INFO L82 PathProgramCache]: Analyzing trace with hash -421737455, now seen corresponding path program 1 times [2019-10-13 20:55:57,450 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:55:57,450 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447069916] [2019-10-13 20:55:57,451 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:55:57,451 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:55:57,451 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:55:57,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:55:57,893 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2019-10-13 20:55:57,893 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447069916] [2019-10-13 20:55:57,894 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:55:57,894 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:55:57,894 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619762631] [2019-10-13 20:55:57,898 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:55:57,898 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:55:57,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:55:57,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:55:57,899 INFO L87 Difference]: Start difference. First operand 1201 states and 1737 transitions. Second operand 3 states. [2019-10-13 20:55:58,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:55:58,209 INFO L93 Difference]: Finished difference Result 2854 states and 4128 transitions. [2019-10-13 20:55:58,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:55:58,210 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 217 [2019-10-13 20:55:58,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:55:58,225 INFO L225 Difference]: With dead ends: 2854 [2019-10-13 20:55:58,225 INFO L226 Difference]: Without dead ends: 1691 [2019-10-13 20:55:58,236 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:55:58,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1691 states. [2019-10-13 20:55:58,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1691 to 1665. [2019-10-13 20:55:58,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1665 states. [2019-10-13 20:55:58,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1665 states to 1665 states and 2409 transitions. [2019-10-13 20:55:58,351 INFO L78 Accepts]: Start accepts. Automaton has 1665 states and 2409 transitions. Word has length 217 [2019-10-13 20:55:58,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:55:58,352 INFO L462 AbstractCegarLoop]: Abstraction has 1665 states and 2409 transitions. [2019-10-13 20:55:58,353 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:55:58,353 INFO L276 IsEmpty]: Start isEmpty. Operand 1665 states and 2409 transitions. [2019-10-13 20:55:58,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2019-10-13 20:55:58,367 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:55:58,368 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 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, 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] [2019-10-13 20:55:58,368 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:55:58,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:55:58,369 INFO L82 PathProgramCache]: Analyzing trace with hash -362704146, now seen corresponding path program 1 times [2019-10-13 20:55:58,369 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:55:58,369 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906091032] [2019-10-13 20:55:58,369 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:55:58,370 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:55:58,370 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:55:58,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:55:58,901 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2019-10-13 20:55:58,902 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906091032] [2019-10-13 20:55:58,902 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036206156] [2019-10-13 20:55:58,902 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:55:59,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:55:59,633 INFO L256 TraceCheckSpWp]: Trace formula consists of 2708 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 20:55:59,659 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:55:59,906 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 209 proven. 0 refuted. 0 times theorem prover too weak. 412 trivial. 0 not checked. [2019-10-13 20:55:59,907 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:56:00,469 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 608 trivial. 0 not checked. [2019-10-13 20:56:00,470 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:56:00,471 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 4] total 7 [2019-10-13 20:56:00,471 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658731980] [2019-10-13 20:56:00,472 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:56:00,472 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:56:00,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:56:00,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-10-13 20:56:00,473 INFO L87 Difference]: Start difference. First operand 1665 states and 2409 transitions. Second operand 3 states. [2019-10-13 20:56:00,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:56:00,582 INFO L93 Difference]: Finished difference Result 3284 states and 4769 transitions. [2019-10-13 20:56:00,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:56:00,582 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 424 [2019-10-13 20:56:00,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:56:00,595 INFO L225 Difference]: With dead ends: 3284 [2019-10-13 20:56:00,595 INFO L226 Difference]: Without dead ends: 1665 [2019-10-13 20:56:00,604 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 852 GetRequests, 847 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 20:56:00,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1665 states. [2019-10-13 20:56:00,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1665 to 1665. [2019-10-13 20:56:00,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1665 states. [2019-10-13 20:56:00,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1665 states to 1665 states and 2405 transitions. [2019-10-13 20:56:00,759 INFO L78 Accepts]: Start accepts. Automaton has 1665 states and 2405 transitions. Word has length 424 [2019-10-13 20:56:00,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:56:00,760 INFO L462 AbstractCegarLoop]: Abstraction has 1665 states and 2405 transitions. [2019-10-13 20:56:00,760 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:56:00,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1665 states and 2405 transitions. [2019-10-13 20:56:00,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2019-10-13 20:56:00,775 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:56:00,776 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 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, 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] [2019-10-13 20:56:00,984 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:56:00,984 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:56:00,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:56:00,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1626417134, now seen corresponding path program 1 times [2019-10-13 20:56:00,985 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:56:00,985 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275330204] [2019-10-13 20:56:00,985 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:56:00,986 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:56:00,986 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:56:01,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:56:01,439 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 614 trivial. 0 not checked. [2019-10-13 20:56:01,440 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275330204] [2019-10-13 20:56:01,440 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145356823] [2019-10-13 20:56:01,440 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:56:02,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:56:02,086 INFO L256 TraceCheckSpWp]: Trace formula consists of 2769 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 20:56:02,101 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:56:02,276 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 554 trivial. 0 not checked. [2019-10-13 20:56:02,276 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:56:02,897 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2019-10-13 20:56:02,898 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 20:56:02,898 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [5] total 7 [2019-10-13 20:56:02,898 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818787319] [2019-10-13 20:56:02,901 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:56:02,901 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:56:02,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:56:02,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-10-13 20:56:02,902 INFO L87 Difference]: Start difference. First operand 1665 states and 2405 transitions. Second operand 4 states. [2019-10-13 20:56:04,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:56:04,060 INFO L93 Difference]: Finished difference Result 3284 states and 4758 transitions. [2019-10-13 20:56:04,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:56:04,060 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 439 [2019-10-13 20:56:04,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:56:04,072 INFO L225 Difference]: With dead ends: 3284 [2019-10-13 20:56:04,073 INFO L226 Difference]: Without dead ends: 1665 [2019-10-13 20:56:04,080 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 882 GetRequests, 874 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 20:56:04,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1665 states. [2019-10-13 20:56:04,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1665 to 1665. [2019-10-13 20:56:04,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1665 states. [2019-10-13 20:56:04,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1665 states to 1665 states and 2403 transitions. [2019-10-13 20:56:04,174 INFO L78 Accepts]: Start accepts. Automaton has 1665 states and 2403 transitions. Word has length 439 [2019-10-13 20:56:04,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:56:04,175 INFO L462 AbstractCegarLoop]: Abstraction has 1665 states and 2403 transitions. [2019-10-13 20:56:04,175 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:56:04,175 INFO L276 IsEmpty]: Start isEmpty. Operand 1665 states and 2403 transitions. [2019-10-13 20:56:04,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 446 [2019-10-13 20:56:04,184 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:56:04,184 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 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, 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] [2019-10-13 20:56:04,392 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:56:04,392 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:56:04,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:56:04,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1148793202, now seen corresponding path program 1 times [2019-10-13 20:56:04,393 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:56:04,393 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628529381] [2019-10-13 20:56:04,393 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:56:04,393 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:56:04,394 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:56:04,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:56:04,969 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 620 trivial. 0 not checked. [2019-10-13 20:56:04,971 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628529381] [2019-10-13 20:56:04,971 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45025662] [2019-10-13 20:56:04,972 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:56:05,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:56:05,525 INFO L256 TraceCheckSpWp]: Trace formula consists of 2793 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 20:56:05,535 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:56:05,743 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2019-10-13 20:56:05,743 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:56:06,186 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 622 trivial. 0 not checked. [2019-10-13 20:56:06,187 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 20:56:06,187 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2019-10-13 20:56:06,187 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516183117] [2019-10-13 20:56:06,188 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:56:06,189 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:56:06,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:56:06,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 20:56:06,189 INFO L87 Difference]: Start difference. First operand 1665 states and 2403 transitions. Second operand 4 states. [2019-10-13 20:56:07,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:56:07,027 INFO L93 Difference]: Finished difference Result 4243 states and 6096 transitions. [2019-10-13 20:56:07,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:56:07,028 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 445 [2019-10-13 20:56:07,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:56:07,052 INFO L225 Difference]: With dead ends: 4243 [2019-10-13 20:56:07,053 INFO L226 Difference]: Without dead ends: 2541 [2019-10-13 20:56:07,068 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 894 GetRequests, 889 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 20:56:07,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2541 states. [2019-10-13 20:56:07,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2541 to 2541. [2019-10-13 20:56:07,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2541 states. [2019-10-13 20:56:07,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2541 states to 2541 states and 3631 transitions. [2019-10-13 20:56:07,241 INFO L78 Accepts]: Start accepts. Automaton has 2541 states and 3631 transitions. Word has length 445 [2019-10-13 20:56:07,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:56:07,243 INFO L462 AbstractCegarLoop]: Abstraction has 2541 states and 3631 transitions. [2019-10-13 20:56:07,244 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:56:07,244 INFO L276 IsEmpty]: Start isEmpty. Operand 2541 states and 3631 transitions. [2019-10-13 20:56:07,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 446 [2019-10-13 20:56:07,256 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:56:07,256 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 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, 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] [2019-10-13 20:56:07,464 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:56:07,464 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:56:07,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:56:07,465 INFO L82 PathProgramCache]: Analyzing trace with hash -982557520, now seen corresponding path program 1 times [2019-10-13 20:56:07,465 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:56:07,472 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146572383] [2019-10-13 20:56:07,472 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:56:07,472 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:56:07,472 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:56:07,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:56:08,350 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 620 trivial. 0 not checked. [2019-10-13 20:56:08,350 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146572383] [2019-10-13 20:56:08,351 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519972576] [2019-10-13 20:56:08,351 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 20:56:08,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:56:08,928 INFO L256 TraceCheckSpWp]: Trace formula consists of 2788 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 20:56:08,958 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:56:09,068 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 560 trivial. 0 not checked. [2019-10-13 20:56:09,069 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:56:09,779 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 622 trivial. 0 not checked. [2019-10-13 20:56:09,779 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 20:56:09,779 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 6 [2019-10-13 20:56:09,779 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807272738] [2019-10-13 20:56:09,780 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:56:09,781 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:56:09,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:56:09,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:56:09,781 INFO L87 Difference]: Start difference. First operand 2541 states and 3631 transitions. Second operand 3 states. [2019-10-13 20:56:10,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:56:10,052 INFO L93 Difference]: Finished difference Result 3797 states and 5398 transitions. [2019-10-13 20:56:10,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:56:10,053 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 445 [2019-10-13 20:56:10,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:56:10,062 INFO L225 Difference]: With dead ends: 3797 [2019-10-13 20:56:10,062 INFO L226 Difference]: Without dead ends: 1279 [2019-10-13 20:56:10,072 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 894 GetRequests, 890 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:56:10,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2019-10-13 20:56:10,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1279. [2019-10-13 20:56:10,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1279 states. [2019-10-13 20:56:10,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1279 states to 1279 states and 1778 transitions. [2019-10-13 20:56:10,137 INFO L78 Accepts]: Start accepts. Automaton has 1279 states and 1778 transitions. Word has length 445 [2019-10-13 20:56:10,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:56:10,138 INFO L462 AbstractCegarLoop]: Abstraction has 1279 states and 1778 transitions. [2019-10-13 20:56:10,138 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:56:10,138 INFO L276 IsEmpty]: Start isEmpty. Operand 1279 states and 1778 transitions. [2019-10-13 20:56:10,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2019-10-13 20:56:10,149 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:56:10,150 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:56:10,366 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:56:10,366 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:56:10,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:56:10,368 INFO L82 PathProgramCache]: Analyzing trace with hash 82045149, now seen corresponding path program 1 times [2019-10-13 20:56:10,368 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:56:10,368 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079138467] [2019-10-13 20:56:10,369 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:56:10,369 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:56:10,369 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:56:10,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:56:10,837 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2019-10-13 20:56:10,838 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079138467] [2019-10-13 20:56:10,838 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:56:10,838 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 20:56:10,839 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272504477] [2019-10-13 20:56:10,840 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:56:10,840 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:56:10,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:56:10,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 20:56:10,840 INFO L87 Difference]: Start difference. First operand 1279 states and 1778 transitions. Second operand 5 states. [2019-10-13 20:56:12,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:56:12,179 INFO L93 Difference]: Finished difference Result 2470 states and 3457 transitions. [2019-10-13 20:56:12,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:56:12,181 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 467 [2019-10-13 20:56:12,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:56:12,190 INFO L225 Difference]: With dead ends: 2470 [2019-10-13 20:56:12,190 INFO L226 Difference]: Without dead ends: 1357 [2019-10-13 20:56:12,195 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 20:56:12,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1357 states. [2019-10-13 20:56:12,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1357 to 1338. [2019-10-13 20:56:12,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1338 states. [2019-10-13 20:56:12,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1338 states to 1338 states and 1877 transitions. [2019-10-13 20:56:12,257 INFO L78 Accepts]: Start accepts. Automaton has 1338 states and 1877 transitions. Word has length 467 [2019-10-13 20:56:12,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:56:12,258 INFO L462 AbstractCegarLoop]: Abstraction has 1338 states and 1877 transitions. [2019-10-13 20:56:12,258 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:56:12,258 INFO L276 IsEmpty]: Start isEmpty. Operand 1338 states and 1877 transitions. [2019-10-13 20:56:12,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2019-10-13 20:56:12,268 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:56:12,270 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:56:12,270 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:56:12,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:56:12,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1715847753, now seen corresponding path program 1 times [2019-10-13 20:56:12,271 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:56:12,271 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562020228] [2019-10-13 20:56:12,271 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:56:12,271 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:56:12,272 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:56:12,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:56:12,581 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2019-10-13 20:56:12,582 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562020228] [2019-10-13 20:56:12,582 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:56:12,582 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:56:12,583 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515531494] [2019-10-13 20:56:12,584 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:56:12,584 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:56:12,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:56:12,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:56:12,585 INFO L87 Difference]: Start difference. First operand 1338 states and 1877 transitions. Second operand 3 states. [2019-10-13 20:56:12,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:56:12,712 INFO L93 Difference]: Finished difference Result 2571 states and 3615 transitions. [2019-10-13 20:56:12,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:56:12,713 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 476 [2019-10-13 20:56:12,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:56:12,725 INFO L225 Difference]: With dead ends: 2571 [2019-10-13 20:56:12,725 INFO L226 Difference]: Without dead ends: 1344 [2019-10-13 20:56:12,731 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:56:12,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2019-10-13 20:56:12,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 1342. [2019-10-13 20:56:12,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1342 states. [2019-10-13 20:56:12,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1342 states to 1342 states and 1880 transitions. [2019-10-13 20:56:12,818 INFO L78 Accepts]: Start accepts. Automaton has 1342 states and 1880 transitions. Word has length 476 [2019-10-13 20:56:12,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:56:12,819 INFO L462 AbstractCegarLoop]: Abstraction has 1342 states and 1880 transitions. [2019-10-13 20:56:12,819 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:56:12,820 INFO L276 IsEmpty]: Start isEmpty. Operand 1342 states and 1880 transitions. [2019-10-13 20:56:12,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2019-10-13 20:56:12,835 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:56:12,836 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:56:12,836 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:56:12,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:56:12,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1468050110, now seen corresponding path program 1 times [2019-10-13 20:56:12,837 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:56:12,837 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514885024] [2019-10-13 20:56:12,838 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:56:12,838 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:56:12,838 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:56:12,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:56:13,231 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 637 trivial. 0 not checked. [2019-10-13 20:56:13,232 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514885024] [2019-10-13 20:56:13,232 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:56:13,233 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 20:56:13,233 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503208446] [2019-10-13 20:56:13,234 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:56:13,234 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:56:13,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:56:13,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 20:56:13,235 INFO L87 Difference]: Start difference. First operand 1342 states and 1880 transitions. Second operand 5 states. [2019-10-13 20:56:13,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:56:13,312 INFO L93 Difference]: Finished difference Result 2304 states and 3243 transitions. [2019-10-13 20:56:13,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 20:56:13,313 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 485 [2019-10-13 20:56:13,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:56:13,323 INFO L225 Difference]: With dead ends: 2304 [2019-10-13 20:56:13,323 INFO L226 Difference]: Without dead ends: 1354 [2019-10-13 20:56:13,328 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 20:56:13,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2019-10-13 20:56:13,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1350. [2019-10-13 20:56:13,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1350 states. [2019-10-13 20:56:13,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 1890 transitions. [2019-10-13 20:56:13,448 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 1890 transitions. Word has length 485 [2019-10-13 20:56:13,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:56:13,449 INFO L462 AbstractCegarLoop]: Abstraction has 1350 states and 1890 transitions. [2019-10-13 20:56:13,450 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:56:13,450 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 1890 transitions. [2019-10-13 20:56:13,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2019-10-13 20:56:13,468 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:56:13,469 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:56:13,470 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:56:13,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:56:13,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1914638397, now seen corresponding path program 1 times [2019-10-13 20:56:13,471 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:56:13,471 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009575154] [2019-10-13 20:56:13,472 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:56:13,472 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:56:13,473 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:56:13,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:56:14,151 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 646 trivial. 0 not checked. [2019-10-13 20:56:14,152 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009575154] [2019-10-13 20:56:14,152 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:56:14,152 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 20:56:14,153 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175171999] [2019-10-13 20:56:14,154 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 20:56:14,154 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:56:14,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 20:56:14,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-10-13 20:56:14,155 INFO L87 Difference]: Start difference. First operand 1350 states and 1890 transitions. Second operand 8 states. [2019-10-13 20:56:14,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:56:14,720 INFO L93 Difference]: Finished difference Result 3286 states and 4618 transitions. [2019-10-13 20:56:14,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-13 20:56:14,721 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 493 [2019-10-13 20:56:14,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:56:14,737 INFO L225 Difference]: With dead ends: 3286 [2019-10-13 20:56:14,737 INFO L226 Difference]: Without dead ends: 2328 [2019-10-13 20:56:14,742 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2019-10-13 20:56:14,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2019-10-13 20:56:14,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 1360. [2019-10-13 20:56:14,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1360 states. [2019-10-13 20:56:14,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 1901 transitions. [2019-10-13 20:56:14,839 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 1901 transitions. Word has length 493 [2019-10-13 20:56:14,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:56:14,840 INFO L462 AbstractCegarLoop]: Abstraction has 1360 states and 1901 transitions. [2019-10-13 20:56:14,840 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 20:56:14,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 1901 transitions. [2019-10-13 20:56:14,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2019-10-13 20:56:14,850 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:56:14,852 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:56:14,852 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:56:14,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:56:14,853 INFO L82 PathProgramCache]: Analyzing trace with hash 2024123150, now seen corresponding path program 1 times [2019-10-13 20:56:14,853 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:56:14,858 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421236878] [2019-10-13 20:56:14,858 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:56:14,858 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:56:14,858 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:56:15,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:56:15,301 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 635 trivial. 0 not checked. [2019-10-13 20:56:15,301 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421236878] [2019-10-13 20:56:15,302 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631396248] [2019-10-13 20:56:15,302 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 20:56:16,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:56:16,068 INFO L256 TraceCheckSpWp]: Trace formula consists of 2864 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 20:56:16,084 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:56:16,217 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2019-10-13 20:56:16,218 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:56:16,795 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 637 trivial. 0 not checked. [2019-10-13 20:56:16,796 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:56:16,796 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 10 [2019-10-13 20:56:16,796 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796794779] [2019-10-13 20:56:16,797 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:56:16,797 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:56:16,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:56:16,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-10-13 20:56:16,798 INFO L87 Difference]: Start difference. First operand 1360 states and 1901 transitions. Second operand 5 states. [2019-10-13 20:56:16,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:56:16,876 INFO L93 Difference]: Finished difference Result 2637 states and 3702 transitions. [2019-10-13 20:56:16,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 20:56:16,877 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 488 [2019-10-13 20:56:16,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:56:16,886 INFO L225 Difference]: With dead ends: 2637 [2019-10-13 20:56:16,886 INFO L226 Difference]: Without dead ends: 1368 [2019-10-13 20:56:16,891 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 983 GetRequests, 975 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 20:56:16,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1368 states. [2019-10-13 20:56:16,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1368 to 1362. [2019-10-13 20:56:16,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1362 states. [2019-10-13 20:56:16,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1362 states to 1362 states and 1905 transitions. [2019-10-13 20:56:16,960 INFO L78 Accepts]: Start accepts. Automaton has 1362 states and 1905 transitions. Word has length 488 [2019-10-13 20:56:16,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:56:16,961 INFO L462 AbstractCegarLoop]: Abstraction has 1362 states and 1905 transitions. [2019-10-13 20:56:16,961 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:56:16,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1362 states and 1905 transitions. [2019-10-13 20:56:16,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2019-10-13 20:56:16,970 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:56:16,971 INFO L380 BasicCegarLoop]: trace histogram [17, 17, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:56:17,178 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:56:17,179 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:56:17,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:56:17,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1649152807, now seen corresponding path program 1 times [2019-10-13 20:56:17,180 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:56:17,181 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290181818] [2019-10-13 20:56:17,181 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:56:17,181 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:56:17,181 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:56:17,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:56:17,726 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 811 trivial. 0 not checked. [2019-10-13 20:56:17,727 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290181818] [2019-10-13 20:56:17,727 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920285881] [2019-10-13 20:56:17,727 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:56:18,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:56:18,389 INFO L256 TraceCheckSpWp]: Trace formula consists of 2911 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 20:56:18,399 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:56:18,510 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 360 proven. 0 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2019-10-13 20:56:18,511 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:56:19,243 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 811 trivial. 0 not checked. [2019-10-13 20:56:19,243 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:56:19,244 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2019-10-13 20:56:19,244 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869994265] [2019-10-13 20:56:19,245 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:56:19,245 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:56:19,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:56:19,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-13 20:56:19,246 INFO L87 Difference]: Start difference. First operand 1362 states and 1905 transitions. Second operand 5 states. [2019-10-13 20:56:19,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:56:19,331 INFO L93 Difference]: Finished difference Result 2584 states and 3628 transitions. [2019-10-13 20:56:19,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 20:56:19,332 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 505 [2019-10-13 20:56:19,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:56:19,341 INFO L225 Difference]: With dead ends: 2584 [2019-10-13 20:56:19,341 INFO L226 Difference]: Without dead ends: 1368 [2019-10-13 20:56:19,346 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 1014 GetRequests, 1008 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 20:56:19,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1368 states. [2019-10-13 20:56:19,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1368 to 1362. [2019-10-13 20:56:19,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1362 states. [2019-10-13 20:56:19,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1362 states to 1362 states and 1903 transitions. [2019-10-13 20:56:19,413 INFO L78 Accepts]: Start accepts. Automaton has 1362 states and 1903 transitions. Word has length 505 [2019-10-13 20:56:19,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:56:19,414 INFO L462 AbstractCegarLoop]: Abstraction has 1362 states and 1903 transitions. [2019-10-13 20:56:19,414 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:56:19,414 INFO L276 IsEmpty]: Start isEmpty. Operand 1362 states and 1903 transitions. [2019-10-13 20:56:19,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 519 [2019-10-13 20:56:19,424 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:56:19,424 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:56:19,633 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:56:19,634 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:56:19,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:56:19,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1690136368, now seen corresponding path program 1 times [2019-10-13 20:56:19,635 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:56:19,635 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661284491] [2019-10-13 20:56:19,635 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:56:19,635 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:56:19,635 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:56:19,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:56:20,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1051 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 1029 trivial. 0 not checked. [2019-10-13 20:56:20,029 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661284491] [2019-10-13 20:56:20,029 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544570516] [2019-10-13 20:56:20,030 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:56:20,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:56:20,678 INFO L256 TraceCheckSpWp]: Trace formula consists of 2932 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 20:56:20,689 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:56:20,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1051 backedges. 288 proven. 0 refuted. 0 times theorem prover too weak. 763 trivial. 0 not checked. [2019-10-13 20:56:20,942 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:56:21,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1051 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 1034 trivial. 0 not checked. [2019-10-13 20:56:21,762 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 20:56:21,762 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 6 [2019-10-13 20:56:21,762 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395981320] [2019-10-13 20:56:21,763 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:56:21,763 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:56:21,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:56:21,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:56:21,764 INFO L87 Difference]: Start difference. First operand 1362 states and 1903 transitions. Second operand 3 states.