/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --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-fb55353 [2019-11-07 00:16:08,093 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 00:16:08,096 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 00:16:08,117 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 00:16:08,118 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 00:16:08,120 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 00:16:08,122 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 00:16:08,135 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 00:16:08,137 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 00:16:08,140 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 00:16:08,141 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 00:16:08,143 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 00:16:08,143 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 00:16:08,147 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 00:16:08,149 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 00:16:08,152 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 00:16:08,154 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 00:16:08,157 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 00:16:08,158 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 00:16:08,164 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 00:16:08,169 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 00:16:08,172 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 00:16:08,175 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 00:16:08,176 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 00:16:08,179 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 00:16:08,179 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 00:16:08,179 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 00:16:08,181 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 00:16:08,182 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 00:16:08,185 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 00:16:08,185 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 00:16:08,186 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 00:16:08,187 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 00:16:08,188 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 00:16:08,189 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 00:16:08,190 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 00:16:08,190 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 00:16:08,191 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 00:16:08,191 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 00:16:08,192 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 00:16:08,193 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 00:16:08,193 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-07 00:16:08,217 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 00:16:08,218 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 00:16:08,220 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 00:16:08,220 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 00:16:08,220 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 00:16:08,221 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 00:16:08,221 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 00:16:08,221 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 00:16:08,221 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 00:16:08,221 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 00:16:08,223 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 00:16:08,223 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 00:16:08,223 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 00:16:08,224 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 00:16:08,224 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 00:16:08,224 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 00:16:08,224 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 00:16:08,224 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 00:16:08,225 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 00:16:08,225 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 00:16:08,225 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 00:16:08,225 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:16:08,225 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 00:16:08,226 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 00:16:08,226 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 00:16:08,226 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 00:16:08,226 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 00:16:08,226 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 00:16:08,226 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 [2019-11-07 00:16:08,506 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 00:16:08,519 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 00:16:08,523 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 00:16:08,524 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 00:16:08,525 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 00:16:08,525 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i [2019-11-07 00:16:08,587 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e334591ec/c1b806925f434cab87f0f2da77bbf94a/FLAG99f4aec88 [2019-11-07 00:16:09,361 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 00:16:09,363 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i [2019-11-07 00:16:09,407 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e334591ec/c1b806925f434cab87f0f2da77bbf94a/FLAG99f4aec88 [2019-11-07 00:16:09,938 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e334591ec/c1b806925f434cab87f0f2da77bbf94a [2019-11-07 00:16:09,952 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 00:16:09,960 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 00:16:09,961 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 00:16:09,962 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 00:16:09,965 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 00:16:09,966 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:16:09" (1/1) ... [2019-11-07 00:16:09,969 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64d21392 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:16:09, skipping insertion in model container [2019-11-07 00:16:09,969 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:16:09" (1/1) ... [2019-11-07 00:16:09,977 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 00:16:10,054 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 00:16:11,196 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:16:11,240 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 00:16:11,448 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:16:11,526 INFO L192 MainTranslator]: Completed translation [2019-11-07 00:16:11,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:16:11 WrapperNode [2019-11-07 00:16:11,527 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 00:16:11,528 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 00:16:11,528 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 00:16:11,528 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 00:16:11,546 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:16:11" (1/1) ... [2019-11-07 00:16:11,547 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:16:11" (1/1) ... [2019-11-07 00:16:11,592 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:16:11" (1/1) ... [2019-11-07 00:16:11,592 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:16:11" (1/1) ... [2019-11-07 00:16:11,670 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:16:11" (1/1) ... [2019-11-07 00:16:11,689 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:16:11" (1/1) ... [2019-11-07 00:16:11,714 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:16:11" (1/1) ... [2019-11-07 00:16:11,743 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 00:16:11,744 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 00:16:11,744 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 00:16:11,744 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 00:16:11,748 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:16:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:16:11,847 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 00:16:11,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 00:16:11,848 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2019-11-07 00:16:11,849 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2019-11-07 00:16:11,849 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2019-11-07 00:16:11,850 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_clear_bit [2019-11-07 00:16:11,850 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2019-11-07 00:16:11,851 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2019-11-07 00:16:11,851 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2019-11-07 00:16:11,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2019-11-07 00:16:11,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2019-11-07 00:16:11,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2019-11-07 00:16:11,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2019-11-07 00:16:11,854 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2019-11-07 00:16:11,854 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_ptr [2019-11-07 00:16:11,855 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_ulong [2019-11-07 00:16:11,858 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2019-11-07 00:16:11,859 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2019-11-07 00:16:11,859 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2019-11-07 00:16:11,860 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_enter [2019-11-07 00:16:11,860 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_exit [2019-11-07 00:16:11,860 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_select [2019-11-07 00:16:11,861 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_inb [2019-11-07 00:16:11,861 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_outb [2019-11-07 00:16:11,861 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_inw [2019-11-07 00:16:11,861 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_outw [2019-11-07 00:16:11,862 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_update_timeout [2019-11-07 00:16:11,862 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_round_time [2019-11-07 00:16:11,862 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_keepalive [2019-11-07 00:16:11,863 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_start [2019-11-07 00:16:11,863 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_stop [2019-11-07 00:16:11,863 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_set_timeout [2019-11-07 00:16:11,863 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_get_status [2019-11-07 00:16:11,864 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_open [2019-11-07 00:16:11,864 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_release [2019-11-07 00:16:11,864 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_write [2019-11-07 00:16:11,865 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_ioctl [2019-11-07 00:16:11,865 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_notify_sys [2019-11-07 00:16:11,866 INFO L138 BoogieDeclarations]: Found implementation of procedure it87_wdt_init [2019-11-07 00:16:11,866 INFO L138 BoogieDeclarations]: Found implementation of procedure it87_wdt_exit [2019-11-07 00:16:11,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_file_operations_2 [2019-11-07 00:16:11,867 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 00:16:11,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv___module_get_5 [2019-11-07 00:16:11,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_nonseekable_open_6 [2019-11-07 00:16:11,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_misc_register_7 [2019-11-07 00:16:11,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_misc_deregister_8 [2019-11-07 00:16:11,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2019-11-07 00:16:11,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2019-11-07 00:16:11,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_err_ptr [2019-11-07 00:16:11,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_ptr_err [2019-11-07 00:16:11,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err_or_null [2019-11-07 00:16:11,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_get [2019-11-07 00:16:11,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_try_module_get [2019-11-07 00:16:11,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put [2019-11-07 00:16:11,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put_and_exit [2019-11-07 00:16:11,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_refcount [2019-11-07 00:16:11,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2019-11-07 00:16:11,873 INFO L138 BoogieDeclarations]: Found implementation of procedure __copy_to_user_overflow [2019-11-07 00:16:11,873 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_fault [2019-11-07 00:16:11,874 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2019-11-07 00:16:11,874 INFO L138 BoogieDeclarations]: Found implementation of procedure __request_region [2019-11-07 00:16:11,874 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_to_user [2019-11-07 00:16:11,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize [2019-11-07 00:16:11,875 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_deregister [2019-11-07 00:16:11,876 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_register [2019-11-07 00:16:11,876 INFO L138 BoogieDeclarations]: Found implementation of procedure no_llseek [2019-11-07 00:16:11,876 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2019-11-07 00:16:11,877 INFO L138 BoogieDeclarations]: Found implementation of procedure register_reboot_notifier [2019-11-07 00:16:11,877 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_reboot_notifier [2019-11-07 00:16:11,877 INFO L138 BoogieDeclarations]: Found implementation of procedure external_alloc [2019-11-07 00:16:11,877 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2019-11-07 00:16:11,878 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2019-11-07 00:16:11,878 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2019-11-07 00:16:11,879 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 00:16:11,879 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2019-11-07 00:16:11,880 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2019-11-07 00:16:11,880 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2019-11-07 00:16:11,880 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2019-11-07 00:16:11,880 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_clear_bit [2019-11-07 00:16:11,881 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2019-11-07 00:16:11,882 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 00:16:11,882 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2019-11-07 00:16:11,882 INFO L130 BoogieDeclarations]: Found specification of procedure __might_fault [2019-11-07 00:16:11,883 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2019-11-07 00:16:11,884 INFO L130 BoogieDeclarations]: Found specification of procedure __request_region [2019-11-07 00:16:11,884 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2019-11-07 00:16:11,885 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2019-11-07 00:16:11,885 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2019-11-07 00:16:11,885 INFO L130 BoogieDeclarations]: Found specification of procedure ldv___module_get_5 [2019-11-07 00:16:11,885 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_get [2019-11-07 00:16:11,886 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-07 00:16:11,886 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-07 00:16:11,886 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 00:16:11,886 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2019-11-07 00:16:11,887 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_pointer [2019-11-07 00:16:11,887 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-07 00:16:11,887 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2019-11-07 00:16:11,888 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-07 00:16:11,888 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2019-11-07 00:16:11,888 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2019-11-07 00:16:11,888 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2019-11-07 00:16:11,889 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2019-11-07 00:16:11,889 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2019-11-07 00:16:11,889 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2019-11-07 00:16:11,889 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_ptr [2019-11-07 00:16:11,890 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_ulong [2019-11-07 00:16:11,890 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2019-11-07 00:16:11,890 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_file_operations_2 [2019-11-07 00:16:11,891 INFO L130 BoogieDeclarations]: Found specification of procedure no_llseek [2019-11-07 00:16:11,891 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_nonseekable_open_6 [2019-11-07 00:16:11,891 INFO L130 BoogieDeclarations]: Found specification of procedure misc_register [2019-11-07 00:16:11,891 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_misc_register_7 [2019-11-07 00:16:11,892 INFO L130 BoogieDeclarations]: Found specification of procedure misc_deregister [2019-11-07 00:16:11,892 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_misc_deregister_8 [2019-11-07 00:16:11,892 INFO L130 BoogieDeclarations]: Found specification of procedure register_reboot_notifier [2019-11-07 00:16:11,893 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_reboot_notifier [2019-11-07 00:16:11,893 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_to_user [2019-11-07 00:16:11,894 INFO L130 BoogieDeclarations]: Found specification of procedure __copy_to_user_overflow [2019-11-07 00:16:11,894 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2019-11-07 00:16:11,894 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 00:16:11,894 INFO L130 BoogieDeclarations]: Found specification of procedure superio_enter [2019-11-07 00:16:11,895 INFO L130 BoogieDeclarations]: Found specification of procedure superio_exit [2019-11-07 00:16:11,895 INFO L130 BoogieDeclarations]: Found specification of procedure superio_select [2019-11-07 00:16:11,895 INFO L130 BoogieDeclarations]: Found specification of procedure superio_inb [2019-11-07 00:16:11,896 INFO L130 BoogieDeclarations]: Found specification of procedure superio_outb [2019-11-07 00:16:11,897 INFO L130 BoogieDeclarations]: Found specification of procedure superio_inw [2019-11-07 00:16:11,897 INFO L130 BoogieDeclarations]: Found specification of procedure superio_outw [2019-11-07 00:16:11,897 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_update_timeout [2019-11-07 00:16:11,897 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_round_time [2019-11-07 00:16:11,898 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_keepalive [2019-11-07 00:16:11,898 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_start [2019-11-07 00:16:11,898 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_stop [2019-11-07 00:16:11,898 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_set_timeout [2019-11-07 00:16:11,899 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_get_status [2019-11-07 00:16:11,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 00:16:11,899 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_open [2019-11-07 00:16:11,900 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_release [2019-11-07 00:16:11,903 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_write [2019-11-07 00:16:11,904 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_ioctl [2019-11-07 00:16:11,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-07 00:16:11,905 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-07 00:16:11,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 00:16:11,905 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_notify_sys [2019-11-07 00:16:11,906 INFO L130 BoogieDeclarations]: Found specification of procedure it87_wdt_init [2019-11-07 00:16:11,912 INFO L130 BoogieDeclarations]: Found specification of procedure it87_wdt_exit [2019-11-07 00:16:11,913 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize [2019-11-07 00:16:11,913 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2019-11-07 00:16:11,913 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 00:16:11,913 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2019-11-07 00:16:11,914 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2019-11-07 00:16:11,914 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_err_ptr [2019-11-07 00:16:11,914 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_ptr_err [2019-11-07 00:16:11,914 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err_or_null [2019-11-07 00:16:11,917 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_try_module_get [2019-11-07 00:16:11,917 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put [2019-11-07 00:16:11,917 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put_and_exit [2019-11-07 00:16:11,918 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_refcount [2019-11-07 00:16:11,918 INFO L130 BoogieDeclarations]: Found specification of procedure external_alloc [2019-11-07 00:16:11,918 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2019-11-07 00:16:11,918 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-07 00:16:11,919 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2019-11-07 00:16:11,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 00:16:11,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-07 00:16:11,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2019-11-07 00:16:11,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-07 00:16:11,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 00:16:13,389 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2019-11-07 00:16:13,397 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_module_put_and_exitFINAL: assume true; [2019-11-07 00:16:14,865 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 00:16:14,865 INFO L284 CfgBuilder]: Removed 0 assume(true) statements. [2019-11-07 00:16:14,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:16:14 BoogieIcfgContainer [2019-11-07 00:16:14,867 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 00:16:14,868 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 00:16:14,868 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 00:16:14,871 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 00:16:14,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:16:09" (1/3) ... [2019-11-07 00:16:14,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@287a1b29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:16:14, skipping insertion in model container [2019-11-07 00:16:14,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:16:11" (2/3) ... [2019-11-07 00:16:14,873 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@287a1b29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:16:14, skipping insertion in model container [2019-11-07 00:16:14,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:16:14" (3/3) ... [2019-11-07 00:16:14,874 INFO L109 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i [2019-11-07 00:16:14,885 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 00:16:14,896 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 00:16:14,908 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 00:16:14,946 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 00:16:14,946 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 00:16:14,947 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 00:16:14,947 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 00:16:14,947 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 00:16:14,947 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 00:16:14,947 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 00:16:14,947 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 00:16:14,993 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states. [2019-11-07 00:16:15,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-11-07 00:16:15,030 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:16:15,032 INFO L410 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] [2019-11-07 00:16:15,035 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:16:15,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:16:15,041 INFO L82 PathProgramCache]: Analyzing trace with hash -960615019, now seen corresponding path program 1 times [2019-11-07 00:16:15,051 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:16:15,052 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369103229] [2019-11-07 00:16:15,052 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:16:15,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:16:15,795 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2019-11-07 00:16:15,796 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369103229] [2019-11-07 00:16:15,797 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:16:15,797 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 00:16:15,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147627714] [2019-11-07 00:16:15,805 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 00:16:15,807 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:16:15,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 00:16:15,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 00:16:15,826 INFO L87 Difference]: Start difference. First operand 665 states. Second operand 3 states. [2019-11-07 00:16:15,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:16:15,964 INFO L93 Difference]: Finished difference Result 683 states and 977 transitions. [2019-11-07 00:16:15,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 00:16:15,967 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 150 [2019-11-07 00:16:15,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:16:16,012 INFO L225 Difference]: With dead ends: 683 [2019-11-07 00:16:16,012 INFO L226 Difference]: Without dead ends: 650 [2019-11-07 00:16:16,018 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 00:16:16,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2019-11-07 00:16:16,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 645. [2019-11-07 00:16:16,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 645 states. [2019-11-07 00:16:16,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 929 transitions. [2019-11-07 00:16:16,182 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 929 transitions. Word has length 150 [2019-11-07 00:16:16,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:16:16,185 INFO L462 AbstractCegarLoop]: Abstraction has 645 states and 929 transitions. [2019-11-07 00:16:16,185 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 00:16:16,185 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 929 transitions. [2019-11-07 00:16:16,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-11-07 00:16:16,190 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:16:16,191 INFO L410 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] [2019-11-07 00:16:16,191 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:16:16,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:16:16,191 INFO L82 PathProgramCache]: Analyzing trace with hash -903356717, now seen corresponding path program 1 times [2019-11-07 00:16:16,192 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:16:16,192 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897166822] [2019-11-07 00:16:16,192 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:16:16,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:16:16,421 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2019-11-07 00:16:16,422 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897166822] [2019-11-07 00:16:16,422 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:16:16,422 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 00:16:16,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910276375] [2019-11-07 00:16:16,425 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 00:16:16,427 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:16:16,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 00:16:16,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 00:16:16,428 INFO L87 Difference]: Start difference. First operand 645 states and 929 transitions. Second operand 3 states. [2019-11-07 00:16:16,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:16:16,540 INFO L93 Difference]: Finished difference Result 1252 states and 1813 transitions. [2019-11-07 00:16:16,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 00:16:16,541 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 150 [2019-11-07 00:16:16,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:16:16,557 INFO L225 Difference]: With dead ends: 1252 [2019-11-07 00:16:16,557 INFO L226 Difference]: Without dead ends: 1202 [2019-11-07 00:16:16,562 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 00:16:16,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1202 states. [2019-11-07 00:16:16,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1202 to 1201. [2019-11-07 00:16:16,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1201 states. [2019-11-07 00:16:16,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 1737 transitions. [2019-11-07 00:16:16,671 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 1737 transitions. Word has length 150 [2019-11-07 00:16:16,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:16:16,678 INFO L462 AbstractCegarLoop]: Abstraction has 1201 states and 1737 transitions. [2019-11-07 00:16:16,678 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 00:16:16,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 1737 transitions. [2019-11-07 00:16:16,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2019-11-07 00:16:16,691 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:16:16,691 INFO L410 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] [2019-11-07 00:16:16,692 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:16:16,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:16:16,694 INFO L82 PathProgramCache]: Analyzing trace with hash -421737455, now seen corresponding path program 1 times [2019-11-07 00:16:16,695 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:16:16,695 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815717782] [2019-11-07 00:16:16,695 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:16:16,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:16:17,021 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2019-11-07 00:16:17,021 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815717782] [2019-11-07 00:16:17,021 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:16:17,022 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 00:16:17,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437799238] [2019-11-07 00:16:17,023 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 00:16:17,023 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:16:17,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 00:16:17,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 00:16:17,024 INFO L87 Difference]: Start difference. First operand 1201 states and 1737 transitions. Second operand 3 states. [2019-11-07 00:16:17,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:16:17,182 INFO L93 Difference]: Finished difference Result 2854 states and 4128 transitions. [2019-11-07 00:16:17,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 00:16:17,182 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 217 [2019-11-07 00:16:17,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:16:17,194 INFO L225 Difference]: With dead ends: 2854 [2019-11-07 00:16:17,194 INFO L226 Difference]: Without dead ends: 1691 [2019-11-07 00:16:17,202 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 00:16:17,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1691 states. [2019-11-07 00:16:17,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1691 to 1665. [2019-11-07 00:16:17,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1665 states. [2019-11-07 00:16:17,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1665 states to 1665 states and 2409 transitions. [2019-11-07 00:16:17,309 INFO L78 Accepts]: Start accepts. Automaton has 1665 states and 2409 transitions. Word has length 217 [2019-11-07 00:16:17,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:16:17,311 INFO L462 AbstractCegarLoop]: Abstraction has 1665 states and 2409 transitions. [2019-11-07 00:16:17,311 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 00:16:17,311 INFO L276 IsEmpty]: Start isEmpty. Operand 1665 states and 2409 transitions. [2019-11-07 00:16:17,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2019-11-07 00:16:17,324 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:16:17,324 INFO L410 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] [2019-11-07 00:16:17,325 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:16:17,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:16:17,325 INFO L82 PathProgramCache]: Analyzing trace with hash -362704146, now seen corresponding path program 1 times [2019-11-07 00:16:17,326 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:16:17,326 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477283192] [2019-11-07 00:16:17,326 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:16:17,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:16:17,830 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2019-11-07 00:16:17,831 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477283192] [2019-11-07 00:16:17,831 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426699927] [2019-11-07 00:16:17,831 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:16:18,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:16:18,577 INFO L256 TraceCheckSpWp]: Trace formula consists of 2708 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:16:18,604 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:16:18,862 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 209 proven. 0 refuted. 0 times theorem prover too weak. 412 trivial. 0 not checked. [2019-11-07 00:16:18,862 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:16:19,540 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 608 trivial. 0 not checked. [2019-11-07 00:16:19,541 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:16:19,542 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 4] total 7 [2019-11-07 00:16:19,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283513634] [2019-11-07 00:16:19,548 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 00:16:19,548 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:16:19,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 00:16:19,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:16:19,549 INFO L87 Difference]: Start difference. First operand 1665 states and 2409 transitions. Second operand 3 states. [2019-11-07 00:16:19,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:16:19,671 INFO L93 Difference]: Finished difference Result 3284 states and 4769 transitions. [2019-11-07 00:16:19,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 00:16:19,671 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 424 [2019-11-07 00:16:19,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:16:19,697 INFO L225 Difference]: With dead ends: 3284 [2019-11-07 00:16:19,697 INFO L226 Difference]: Without dead ends: 1665 [2019-11-07 00:16:19,708 INFO L630 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 [2019-11-07 00:16:19,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1665 states. [2019-11-07 00:16:19,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1665 to 1665. [2019-11-07 00:16:19,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1665 states. [2019-11-07 00:16:19,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1665 states to 1665 states and 2405 transitions. [2019-11-07 00:16:19,810 INFO L78 Accepts]: Start accepts. Automaton has 1665 states and 2405 transitions. Word has length 424 [2019-11-07 00:16:19,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:16:19,812 INFO L462 AbstractCegarLoop]: Abstraction has 1665 states and 2405 transitions. [2019-11-07 00:16:19,812 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 00:16:19,812 INFO L276 IsEmpty]: Start isEmpty. Operand 1665 states and 2405 transitions. [2019-11-07 00:16:19,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2019-11-07 00:16:19,824 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:16:19,825 INFO L410 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] [2019-11-07 00:16:20,035 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:16:20,035 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:16:20,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:16:20,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1626417134, now seen corresponding path program 1 times [2019-11-07 00:16:20,036 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:16:20,036 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832234414] [2019-11-07 00:16:20,036 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:16:20,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:16:20,420 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 614 trivial. 0 not checked. [2019-11-07 00:16:20,421 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832234414] [2019-11-07 00:16:20,421 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386112730] [2019-11-07 00:16:20,421 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:16:21,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:16:21,073 INFO L256 TraceCheckSpWp]: Trace formula consists of 2769 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 00:16:21,086 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:16:21,295 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 554 trivial. 0 not checked. [2019-11-07 00:16:21,295 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:16:21,909 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2019-11-07 00:16:21,909 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:16:21,910 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [5] total 7 [2019-11-07 00:16:21,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63958976] [2019-11-07 00:16:21,914 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:16:21,914 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:16:21,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:16:21,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:16:21,915 INFO L87 Difference]: Start difference. First operand 1665 states and 2405 transitions. Second operand 4 states. [2019-11-07 00:16:23,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:16:23,146 INFO L93 Difference]: Finished difference Result 3284 states and 4758 transitions. [2019-11-07 00:16:23,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 00:16:23,148 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 439 [2019-11-07 00:16:23,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:16:23,165 INFO L225 Difference]: With dead ends: 3284 [2019-11-07 00:16:23,165 INFO L226 Difference]: Without dead ends: 1665 [2019-11-07 00:16:23,175 INFO L630 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 [2019-11-07 00:16:23,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1665 states. [2019-11-07 00:16:23,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1665 to 1665. [2019-11-07 00:16:23,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1665 states. [2019-11-07 00:16:23,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1665 states to 1665 states and 2403 transitions. [2019-11-07 00:16:23,271 INFO L78 Accepts]: Start accepts. Automaton has 1665 states and 2403 transitions. Word has length 439 [2019-11-07 00:16:23,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:16:23,274 INFO L462 AbstractCegarLoop]: Abstraction has 1665 states and 2403 transitions. [2019-11-07 00:16:23,275 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:16:23,275 INFO L276 IsEmpty]: Start isEmpty. Operand 1665 states and 2403 transitions. [2019-11-07 00:16:23,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2019-11-07 00:16:23,287 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:16:23,288 INFO L410 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] [2019-11-07 00:16:23,500 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:16:23,501 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:16:23,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:16:23,502 INFO L82 PathProgramCache]: Analyzing trace with hash -127095123, now seen corresponding path program 1 times [2019-11-07 00:16:23,502 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:16:23,503 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741936921] [2019-11-07 00:16:23,503 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:16:23,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:16:23,903 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 614 trivial. 0 not checked. [2019-11-07 00:16:23,904 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741936921] [2019-11-07 00:16:23,904 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425641922] [2019-11-07 00:16:23,904 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:16:24,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:16:24,711 INFO L256 TraceCheckSpWp]: Trace formula consists of 2755 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 00:16:24,721 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:16:24,888 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2019-11-07 00:16:24,889 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:16:25,664 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2019-11-07 00:16:25,664 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:16:25,665 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2019-11-07 00:16:25,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328880788] [2019-11-07 00:16:25,666 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 00:16:25,666 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:16:25,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 00:16:25,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:16:25,667 INFO L87 Difference]: Start difference. First operand 1665 states and 2403 transitions. Second operand 4 states. [2019-11-07 00:16:26,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:16:26,888 INFO L93 Difference]: Finished difference Result 4243 states and 6096 transitions. [2019-11-07 00:16:26,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:16:26,889 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 436 [2019-11-07 00:16:26,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:16:26,904 INFO L225 Difference]: With dead ends: 4243 [2019-11-07 00:16:26,905 INFO L226 Difference]: Without dead ends: 2541 [2019-11-07 00:16:26,913 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 876 GetRequests, 871 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-07 00:16:26,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2541 states. [2019-11-07 00:16:27,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2541 to 2541. [2019-11-07 00:16:27,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2541 states. [2019-11-07 00:16:27,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2541 states to 2541 states and 3631 transitions. [2019-11-07 00:16:27,057 INFO L78 Accepts]: Start accepts. Automaton has 2541 states and 3631 transitions. Word has length 436 [2019-11-07 00:16:27,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:16:27,058 INFO L462 AbstractCegarLoop]: Abstraction has 2541 states and 3631 transitions. [2019-11-07 00:16:27,058 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 00:16:27,059 INFO L276 IsEmpty]: Start isEmpty. Operand 2541 states and 3631 transitions. [2019-11-07 00:16:27,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2019-11-07 00:16:27,084 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:16:27,084 INFO L410 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, 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] [2019-11-07 00:16:27,293 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:16:27,293 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:16:27,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:16:27,294 INFO L82 PathProgramCache]: Analyzing trace with hash 2036521451, now seen corresponding path program 1 times [2019-11-07 00:16:27,294 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:16:27,294 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912168483] [2019-11-07 00:16:27,295 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:16:27,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:16:27,710 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 614 trivial. 0 not checked. [2019-11-07 00:16:27,710 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912168483] [2019-11-07 00:16:27,710 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895360117] [2019-11-07 00:16:27,711 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:16:28,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:16:28,598 INFO L256 TraceCheckSpWp]: Trace formula consists of 2750 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 00:16:28,618 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:16:28,843 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 554 trivial. 0 not checked. [2019-11-07 00:16:28,843 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:16:29,336 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2019-11-07 00:16:29,336 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:16:29,336 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 6 [2019-11-07 00:16:29,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111515079] [2019-11-07 00:16:29,338 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 00:16:29,338 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:16:29,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 00:16:29,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:16:29,339 INFO L87 Difference]: Start difference. First operand 2541 states and 3631 transitions. Second operand 3 states. [2019-11-07 00:16:29,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:16:29,630 INFO L93 Difference]: Finished difference Result 3797 states and 5398 transitions. [2019-11-07 00:16:29,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 00:16:29,631 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 436 [2019-11-07 00:16:29,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:16:29,639 INFO L225 Difference]: With dead ends: 3797 [2019-11-07 00:16:29,639 INFO L226 Difference]: Without dead ends: 1279 [2019-11-07 00:16:29,648 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 876 GetRequests, 872 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:16:29,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2019-11-07 00:16:29,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1279. [2019-11-07 00:16:29,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1279 states. [2019-11-07 00:16:29,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1279 states to 1279 states and 1778 transitions. [2019-11-07 00:16:29,705 INFO L78 Accepts]: Start accepts. Automaton has 1279 states and 1778 transitions. Word has length 436 [2019-11-07 00:16:29,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:16:29,705 INFO L462 AbstractCegarLoop]: Abstraction has 1279 states and 1778 transitions. [2019-11-07 00:16:29,705 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 00:16:29,706 INFO L276 IsEmpty]: Start isEmpty. Operand 1279 states and 1778 transitions. [2019-11-07 00:16:29,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2019-11-07 00:16:29,714 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:16:29,714 INFO L410 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] [2019-11-07 00:16:29,920 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:16:29,921 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:16:29,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:16:29,921 INFO L82 PathProgramCache]: Analyzing trace with hash 965491253, now seen corresponding path program 1 times [2019-11-07 00:16:29,922 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:16:29,922 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632170961] [2019-11-07 00:16:29,922 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:16:29,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:16:30,336 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2019-11-07 00:16:30,336 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632170961] [2019-11-07 00:16:30,336 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:16:30,336 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 00:16:30,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239944367] [2019-11-07 00:16:30,337 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:16:30,338 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:16:30,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:16:30,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:16:30,338 INFO L87 Difference]: Start difference. First operand 1279 states and 1778 transitions. Second operand 5 states. [2019-11-07 00:16:31,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:16:31,965 INFO L93 Difference]: Finished difference Result 2470 states and 3457 transitions. [2019-11-07 00:16:31,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 00:16:31,965 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 463 [2019-11-07 00:16:31,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:16:31,976 INFO L225 Difference]: With dead ends: 2470 [2019-11-07 00:16:31,976 INFO L226 Difference]: Without dead ends: 1357 [2019-11-07 00:16:31,981 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:16:31,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1357 states. [2019-11-07 00:16:32,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1357 to 1338. [2019-11-07 00:16:32,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1338 states. [2019-11-07 00:16:32,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1338 states to 1338 states and 1877 transitions. [2019-11-07 00:16:32,047 INFO L78 Accepts]: Start accepts. Automaton has 1338 states and 1877 transitions. Word has length 463 [2019-11-07 00:16:32,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:16:32,048 INFO L462 AbstractCegarLoop]: Abstraction has 1338 states and 1877 transitions. [2019-11-07 00:16:32,048 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:16:32,048 INFO L276 IsEmpty]: Start isEmpty. Operand 1338 states and 1877 transitions. [2019-11-07 00:16:32,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2019-11-07 00:16:32,057 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:16:32,057 INFO L410 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] [2019-11-07 00:16:32,058 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:16:32,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:16:32,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1775596220, now seen corresponding path program 1 times [2019-11-07 00:16:32,058 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:16:32,059 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605166283] [2019-11-07 00:16:32,059 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:16:32,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:16:32,392 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 642 trivial. 0 not checked. [2019-11-07 00:16:32,393 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605166283] [2019-11-07 00:16:32,394 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:16:32,394 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 00:16:32,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734868592] [2019-11-07 00:16:32,395 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 00:16:32,395 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:16:32,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 00:16:32,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 00:16:32,396 INFO L87 Difference]: Start difference. First operand 1338 states and 1877 transitions. Second operand 3 states. [2019-11-07 00:16:32,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:16:32,492 INFO L93 Difference]: Finished difference Result 2571 states and 3615 transitions. [2019-11-07 00:16:32,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 00:16:32,493 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 485 [2019-11-07 00:16:32,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:16:32,502 INFO L225 Difference]: With dead ends: 2571 [2019-11-07 00:16:32,502 INFO L226 Difference]: Without dead ends: 1344 [2019-11-07 00:16:32,507 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 00:16:32,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2019-11-07 00:16:32,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 1342. [2019-11-07 00:16:32,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1342 states. [2019-11-07 00:16:32,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1342 states to 1342 states and 1880 transitions. [2019-11-07 00:16:32,569 INFO L78 Accepts]: Start accepts. Automaton has 1342 states and 1880 transitions. Word has length 485 [2019-11-07 00:16:32,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:16:32,570 INFO L462 AbstractCegarLoop]: Abstraction has 1342 states and 1880 transitions. [2019-11-07 00:16:32,570 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 00:16:32,570 INFO L276 IsEmpty]: Start isEmpty. Operand 1342 states and 1880 transitions. [2019-11-07 00:16:32,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2019-11-07 00:16:32,579 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:16:32,580 INFO L410 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] [2019-11-07 00:16:32,581 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:16:32,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:16:32,581 INFO L82 PathProgramCache]: Analyzing trace with hash -837476345, now seen corresponding path program 1 times [2019-11-07 00:16:32,581 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:16:32,582 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952835531] [2019-11-07 00:16:32,582 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:16:32,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:16:33,003 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2019-11-07 00:16:33,003 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952835531] [2019-11-07 00:16:33,003 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:16:33,003 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 00:16:33,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626835218] [2019-11-07 00:16:33,004 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:16:33,005 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:16:33,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:16:33,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:16:33,005 INFO L87 Difference]: Start difference. First operand 1342 states and 1880 transitions. Second operand 5 states. [2019-11-07 00:16:33,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:16:33,087 INFO L93 Difference]: Finished difference Result 2304 states and 3243 transitions. [2019-11-07 00:16:33,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:16:33,087 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 476 [2019-11-07 00:16:33,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:16:33,096 INFO L225 Difference]: With dead ends: 2304 [2019-11-07 00:16:33,097 INFO L226 Difference]: Without dead ends: 1354 [2019-11-07 00:16:33,101 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:16:33,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2019-11-07 00:16:33,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1350. [2019-11-07 00:16:33,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1350 states. [2019-11-07 00:16:33,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 1890 transitions. [2019-11-07 00:16:33,162 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 1890 transitions. Word has length 476 [2019-11-07 00:16:33,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:16:33,163 INFO L462 AbstractCegarLoop]: Abstraction has 1350 states and 1890 transitions. [2019-11-07 00:16:33,163 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:16:33,163 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 1890 transitions. [2019-11-07 00:16:33,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2019-11-07 00:16:33,171 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:16:33,172 INFO L410 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] [2019-11-07 00:16:33,172 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:16:33,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:16:33,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1561187194, now seen corresponding path program 1 times [2019-11-07 00:16:33,173 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:16:33,173 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679969253] [2019-11-07 00:16:33,173 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:16:33,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:16:33,526 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2019-11-07 00:16:33,526 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679969253] [2019-11-07 00:16:33,526 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:16:33,527 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-07 00:16:33,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926877300] [2019-11-07 00:16:33,528 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-07 00:16:33,528 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:16:33,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-07 00:16:33,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:16:33,529 INFO L87 Difference]: Start difference. First operand 1350 states and 1890 transitions. Second operand 8 states. [2019-11-07 00:16:33,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:16:33,954 INFO L93 Difference]: Finished difference Result 3286 states and 4618 transitions. [2019-11-07 00:16:33,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-07 00:16:33,954 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 484 [2019-11-07 00:16:33,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:16:33,968 INFO L225 Difference]: With dead ends: 3286 [2019-11-07 00:16:33,969 INFO L226 Difference]: Without dead ends: 2328 [2019-11-07 00:16:33,977 INFO L630 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 [2019-11-07 00:16:33,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2019-11-07 00:16:34,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 1360. [2019-11-07 00:16:34,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1360 states. [2019-11-07 00:16:34,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 1901 transitions. [2019-11-07 00:16:34,066 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 1901 transitions. Word has length 484 [2019-11-07 00:16:34,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:16:34,068 INFO L462 AbstractCegarLoop]: Abstraction has 1360 states and 1901 transitions. [2019-11-07 00:16:34,068 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-07 00:16:34,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 1901 transitions. [2019-11-07 00:16:34,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2019-11-07 00:16:34,079 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:16:34,081 INFO L410 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] [2019-11-07 00:16:34,081 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:16:34,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:16:34,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1497241791, now seen corresponding path program 1 times [2019-11-07 00:16:34,082 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:16:34,087 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402662622] [2019-11-07 00:16:34,087 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:16:34,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:16:34,485 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 640 trivial. 0 not checked. [2019-11-07 00:16:34,486 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402662622] [2019-11-07 00:16:34,486 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801708340] [2019-11-07 00:16:34,486 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:16:35,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:16:35,301 INFO L256 TraceCheckSpWp]: Trace formula consists of 2876 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 00:16:35,312 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:16:35,452 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 249 proven. 0 refuted. 0 times theorem prover too weak. 413 trivial. 0 not checked. [2019-11-07 00:16:35,453 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:16:36,105 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 645 trivial. 0 not checked. [2019-11-07 00:16:36,105 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 00:16:36,106 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 6 [2019-11-07 00:16:36,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296852531] [2019-11-07 00:16:36,107 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 00:16:36,108 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:16:36,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 00:16:36,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:16:36,108 INFO L87 Difference]: Start difference. First operand 1360 states and 1901 transitions. Second operand 3 states. [2019-11-07 00:16:36,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:16:36,540 INFO L93 Difference]: Finished difference Result 1397 states and 1940 transitions. [2019-11-07 00:16:36,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 00:16:36,541 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 493 [2019-11-07 00:16:36,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:16:36,549 INFO L225 Difference]: With dead ends: 1397 [2019-11-07 00:16:36,549 INFO L226 Difference]: Without dead ends: 1259 [2019-11-07 00:16:36,550 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 993 GetRequests, 987 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:16:36,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2019-11-07 00:16:36,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 1259. [2019-11-07 00:16:36,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1259 states. [2019-11-07 00:16:36,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1259 states to 1259 states and 1755 transitions. [2019-11-07 00:16:36,612 INFO L78 Accepts]: Start accepts. Automaton has 1259 states and 1755 transitions. Word has length 493 [2019-11-07 00:16:36,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:16:36,612 INFO L462 AbstractCegarLoop]: Abstraction has 1259 states and 1755 transitions. [2019-11-07 00:16:36,613 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 00:16:36,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1259 states and 1755 transitions. [2019-11-07 00:16:36,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2019-11-07 00:16:36,621 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:16:36,621 INFO L410 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, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:16:36,829 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:16:36,829 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:16:36,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:16:36,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1092467419, now seen corresponding path program 1 times [2019-11-07 00:16:36,831 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:16:36,831 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693343201] [2019-11-07 00:16:36,831 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:16:36,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:16:37,292 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 623 trivial. 0 not checked. [2019-11-07 00:16:37,292 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693343201] [2019-11-07 00:16:37,293 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51033999] [2019-11-07 00:16:37,293 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 [2019-11-07 00:16:38,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:16:38,123 INFO L256 TraceCheckSpWp]: Trace formula consists of 2826 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 00:16:38,133 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:16:38,259 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2019-11-07 00:16:38,260 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:16:39,005 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2019-11-07 00:16:39,006 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:16:39,006 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 10 [2019-11-07 00:16:39,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108419419] [2019-11-07 00:16:39,007 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:16:39,007 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:16:39,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:16:39,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-11-07 00:16:39,008 INFO L87 Difference]: Start difference. First operand 1259 states and 1755 transitions. Second operand 5 states. [2019-11-07 00:16:39,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:16:39,084 INFO L93 Difference]: Finished difference Result 2433 states and 3407 transitions. [2019-11-07 00:16:39,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 00:16:39,085 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 479 [2019-11-07 00:16:39,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:16:39,092 INFO L225 Difference]: With dead ends: 2433 [2019-11-07 00:16:39,092 INFO L226 Difference]: Without dead ends: 1265 [2019-11-07 00:16:39,097 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 965 GetRequests, 957 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-11-07 00:16:39,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2019-11-07 00:16:39,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 1261. [2019-11-07 00:16:39,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1261 states. [2019-11-07 00:16:39,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 1759 transitions. [2019-11-07 00:16:39,166 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 1759 transitions. Word has length 479 [2019-11-07 00:16:39,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:16:39,167 INFO L462 AbstractCegarLoop]: Abstraction has 1261 states and 1759 transitions. [2019-11-07 00:16:39,167 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:16:39,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 1759 transitions. [2019-11-07 00:16:39,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2019-11-07 00:16:39,180 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:16:39,181 INFO L410 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:16:39,400 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:16:39,400 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:16:39,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:16:39,401 INFO L82 PathProgramCache]: Analyzing trace with hash -582237446, now seen corresponding path program 1 times [2019-11-07 00:16:39,401 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:16:39,401 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241372833] [2019-11-07 00:16:39,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:16:39,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:16:39,791 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 799 trivial. 0 not checked. [2019-11-07 00:16:39,792 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241372833] [2019-11-07 00:16:39,792 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789848701] [2019-11-07 00:16:39,792 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