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 0.1.24-13a467a-m [2019-10-15 00:54:52,389 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:54:52,390 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:54:52,402 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:54:52,402 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:54:52,403 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:54:52,405 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:54:52,407 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:54:52,414 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:54:52,416 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:54:52,416 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:54:52,418 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:54:52,419 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:54:52,420 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:54:52,420 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:54:52,421 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:54:52,422 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:54:52,423 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:54:52,425 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:54:52,430 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:54:52,432 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:54:52,436 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:54:52,437 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:54:52,438 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:54:52,441 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 00:54:52,441 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 00:54:52,441 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 00:54:52,442 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 00:54:52,442 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 00:54:52,443 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 00:54:52,444 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 00:54:52,444 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 00:54:52,445 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 00:54:52,446 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 00:54:52,447 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 00:54:52,447 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 00:54:52,448 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 00:54:52,448 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 00:54:52,448 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:54:52,449 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:54:52,450 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:54:52,450 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 00:54:52,468 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:54:52,468 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:54:52,470 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:54:52,470 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:54:52,470 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:54:52,470 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:54:52,471 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:54:52,471 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:54:52,471 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:54:52,472 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:54:52,472 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:54:52,472 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:54:52,472 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:54:52,472 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:54:52,473 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:54:52,473 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:54:52,473 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:54:52,474 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:54:52,474 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:54:52,475 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:54:52,475 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:54:52,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:54:52,475 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:54:52,476 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:54:52,476 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:54:52,476 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:54:52,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:54:52,476 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:54:52,477 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-15 00:54:52,737 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:54:52,750 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:54:52,753 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:54:52,755 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:54:52,755 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:54:52,756 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i [2019-10-15 00:54:52,826 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d852fa4c2/5b2fe9cc06e44c78897578a8042822f2/FLAGcd551ee7a [2019-10-15 00:54:53,570 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:54:53,574 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i [2019-10-15 00:54:53,602 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d852fa4c2/5b2fe9cc06e44c78897578a8042822f2/FLAGcd551ee7a [2019-10-15 00:54:53,636 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d852fa4c2/5b2fe9cc06e44c78897578a8042822f2 [2019-10-15 00:54:53,646 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:54:53,648 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:54:53,649 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:54:53,650 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:54:53,653 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:54:53,654 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:54:53" (1/1) ... [2019-10-15 00:54:53,657 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5372b4b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:54:53, skipping insertion in model container [2019-10-15 00:54:53,657 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:54:53" (1/1) ... [2019-10-15 00:54:53,664 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:54:53,765 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:54:54,926 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:54:54,955 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:54:55,163 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:54:55,247 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:54:55,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:54:55 WrapperNode [2019-10-15 00:54:55,248 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:54:55,249 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:54:55,249 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:54:55,249 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:54:55,265 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:54:55" (1/1) ... [2019-10-15 00:54:55,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:54:55" (1/1) ... [2019-10-15 00:54:55,328 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:54:55" (1/1) ... [2019-10-15 00:54:55,329 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:54:55" (1/1) ... [2019-10-15 00:54:55,404 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:54:55" (1/1) ... [2019-10-15 00:54:55,421 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:54:55" (1/1) ... [2019-10-15 00:54:55,437 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:54:55" (1/1) ... [2019-10-15 00:54:55,459 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:54:55,460 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:54:55,460 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:54:55,460 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:54:55,464 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:54:55" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:54:55,541 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:54:55,541 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:54:55,541 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2019-10-15 00:54:55,541 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2019-10-15 00:54:55,542 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2019-10-15 00:54:55,542 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_clear_bit [2019-10-15 00:54:55,543 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2019-10-15 00:54:55,543 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2019-10-15 00:54:55,543 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2019-10-15 00:54:55,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2019-10-15 00:54:55,544 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2019-10-15 00:54:55,544 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2019-10-15 00:54:55,544 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2019-10-15 00:54:55,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2019-10-15 00:54:55,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_ptr [2019-10-15 00:54:55,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_ulong [2019-10-15 00:54:55,547 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2019-10-15 00:54:55,547 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2019-10-15 00:54:55,547 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2019-10-15 00:54:55,548 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_enter [2019-10-15 00:54:55,548 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_exit [2019-10-15 00:54:55,548 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_select [2019-10-15 00:54:55,548 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_inb [2019-10-15 00:54:55,548 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_outb [2019-10-15 00:54:55,549 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_inw [2019-10-15 00:54:55,549 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_outw [2019-10-15 00:54:55,549 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_update_timeout [2019-10-15 00:54:55,549 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_round_time [2019-10-15 00:54:55,549 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_keepalive [2019-10-15 00:54:55,549 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_start [2019-10-15 00:54:55,550 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_stop [2019-10-15 00:54:55,550 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_set_timeout [2019-10-15 00:54:55,550 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_get_status [2019-10-15 00:54:55,550 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_open [2019-10-15 00:54:55,550 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_release [2019-10-15 00:54:55,551 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_write [2019-10-15 00:54:55,551 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_ioctl [2019-10-15 00:54:55,551 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_notify_sys [2019-10-15 00:54:55,551 INFO L138 BoogieDeclarations]: Found implementation of procedure it87_wdt_init [2019-10-15 00:54:55,551 INFO L138 BoogieDeclarations]: Found implementation of procedure it87_wdt_exit [2019-10-15 00:54:55,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_file_operations_2 [2019-10-15 00:54:55,552 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:54:55,552 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv___module_get_5 [2019-10-15 00:54:55,552 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_nonseekable_open_6 [2019-10-15 00:54:55,552 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_misc_register_7 [2019-10-15 00:54:55,552 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_misc_deregister_8 [2019-10-15 00:54:55,552 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2019-10-15 00:54:55,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2019-10-15 00:54:55,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_err_ptr [2019-10-15 00:54:55,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_ptr_err [2019-10-15 00:54:55,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err_or_null [2019-10-15 00:54:55,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_get [2019-10-15 00:54:55,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_try_module_get [2019-10-15 00:54:55,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put [2019-10-15 00:54:55,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put_and_exit [2019-10-15 00:54:55,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_refcount [2019-10-15 00:54:55,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2019-10-15 00:54:55,554 INFO L138 BoogieDeclarations]: Found implementation of procedure __copy_to_user_overflow [2019-10-15 00:54:55,554 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_fault [2019-10-15 00:54:55,554 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2019-10-15 00:54:55,555 INFO L138 BoogieDeclarations]: Found implementation of procedure __request_region [2019-10-15 00:54:55,555 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_to_user [2019-10-15 00:54:55,555 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize [2019-10-15 00:54:55,555 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_deregister [2019-10-15 00:54:55,556 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_register [2019-10-15 00:54:55,556 INFO L138 BoogieDeclarations]: Found implementation of procedure no_llseek [2019-10-15 00:54:55,556 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2019-10-15 00:54:55,556 INFO L138 BoogieDeclarations]: Found implementation of procedure register_reboot_notifier [2019-10-15 00:54:55,556 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_reboot_notifier [2019-10-15 00:54:55,556 INFO L138 BoogieDeclarations]: Found implementation of procedure external_alloc [2019-10-15 00:54:55,556 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2019-10-15 00:54:55,557 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2019-10-15 00:54:55,557 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2019-10-15 00:54:55,558 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:54:55,558 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2019-10-15 00:54:55,558 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2019-10-15 00:54:55,558 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2019-10-15 00:54:55,558 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2019-10-15 00:54:55,558 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_clear_bit [2019-10-15 00:54:55,559 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2019-10-15 00:54:55,559 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 00:54:55,559 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2019-10-15 00:54:55,559 INFO L130 BoogieDeclarations]: Found specification of procedure __might_fault [2019-10-15 00:54:55,560 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2019-10-15 00:54:55,560 INFO L130 BoogieDeclarations]: Found specification of procedure __request_region [2019-10-15 00:54:55,561 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2019-10-15 00:54:55,561 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2019-10-15 00:54:55,562 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2019-10-15 00:54:55,562 INFO L130 BoogieDeclarations]: Found specification of procedure ldv___module_get_5 [2019-10-15 00:54:55,562 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_get [2019-10-15 00:54:55,562 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 00:54:55,562 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-10-15 00:54:55,563 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:54:55,563 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2019-10-15 00:54:55,563 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_pointer [2019-10-15 00:54:55,563 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-15 00:54:55,563 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2019-10-15 00:54:55,564 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 00:54:55,564 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2019-10-15 00:54:55,564 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2019-10-15 00:54:55,564 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2019-10-15 00:54:55,564 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2019-10-15 00:54:55,564 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2019-10-15 00:54:55,565 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2019-10-15 00:54:55,565 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_ptr [2019-10-15 00:54:55,565 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_ulong [2019-10-15 00:54:55,565 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2019-10-15 00:54:55,565 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_file_operations_2 [2019-10-15 00:54:55,566 INFO L130 BoogieDeclarations]: Found specification of procedure no_llseek [2019-10-15 00:54:55,566 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_nonseekable_open_6 [2019-10-15 00:54:55,566 INFO L130 BoogieDeclarations]: Found specification of procedure misc_register [2019-10-15 00:54:55,566 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_misc_register_7 [2019-10-15 00:54:55,566 INFO L130 BoogieDeclarations]: Found specification of procedure misc_deregister [2019-10-15 00:54:55,566 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_misc_deregister_8 [2019-10-15 00:54:55,567 INFO L130 BoogieDeclarations]: Found specification of procedure register_reboot_notifier [2019-10-15 00:54:55,567 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_reboot_notifier [2019-10-15 00:54:55,567 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_to_user [2019-10-15 00:54:55,568 INFO L130 BoogieDeclarations]: Found specification of procedure __copy_to_user_overflow [2019-10-15 00:54:55,568 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2019-10-15 00:54:55,568 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 00:54:55,568 INFO L130 BoogieDeclarations]: Found specification of procedure superio_enter [2019-10-15 00:54:55,569 INFO L130 BoogieDeclarations]: Found specification of procedure superio_exit [2019-10-15 00:54:55,569 INFO L130 BoogieDeclarations]: Found specification of procedure superio_select [2019-10-15 00:54:55,569 INFO L130 BoogieDeclarations]: Found specification of procedure superio_inb [2019-10-15 00:54:55,570 INFO L130 BoogieDeclarations]: Found specification of procedure superio_outb [2019-10-15 00:54:55,570 INFO L130 BoogieDeclarations]: Found specification of procedure superio_inw [2019-10-15 00:54:55,570 INFO L130 BoogieDeclarations]: Found specification of procedure superio_outw [2019-10-15 00:54:55,570 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_update_timeout [2019-10-15 00:54:55,571 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_round_time [2019-10-15 00:54:55,571 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_keepalive [2019-10-15 00:54:55,571 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_start [2019-10-15 00:54:55,571 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_stop [2019-10-15 00:54:55,572 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_set_timeout [2019-10-15 00:54:55,572 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_get_status [2019-10-15 00:54:55,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 00:54:55,572 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_open [2019-10-15 00:54:55,573 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_release [2019-10-15 00:54:55,576 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_write [2019-10-15 00:54:55,577 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_ioctl [2019-10-15 00:54:55,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-15 00:54:55,578 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-15 00:54:55,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 00:54:55,578 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_notify_sys [2019-10-15 00:54:55,579 INFO L130 BoogieDeclarations]: Found specification of procedure it87_wdt_init [2019-10-15 00:54:55,585 INFO L130 BoogieDeclarations]: Found specification of procedure it87_wdt_exit [2019-10-15 00:54:55,585 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize [2019-10-15 00:54:55,585 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2019-10-15 00:54:55,586 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:54:55,586 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2019-10-15 00:54:55,586 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2019-10-15 00:54:55,586 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_err_ptr [2019-10-15 00:54:55,586 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_ptr_err [2019-10-15 00:54:55,586 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err_or_null [2019-10-15 00:54:55,587 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_try_module_get [2019-10-15 00:54:55,587 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put [2019-10-15 00:54:55,587 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put_and_exit [2019-10-15 00:54:55,587 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_refcount [2019-10-15 00:54:55,588 INFO L130 BoogieDeclarations]: Found specification of procedure external_alloc [2019-10-15 00:54:55,589 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2019-10-15 00:54:55,589 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-15 00:54:55,589 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2019-10-15 00:54:55,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:54:55,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-15 00:54:55,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2019-10-15 00:54:55,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-10-15 00:54:55,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:54:56,840 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2019-10-15 00:54:56,851 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_module_put_and_exitFINAL: assume true; [2019-10-15 00:54:58,483 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:54:58,483 INFO L284 CfgBuilder]: Removed 0 assume(true) statements. [2019-10-15 00:54:58,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:54:58 BoogieIcfgContainer [2019-10-15 00:54:58,486 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:54:58,487 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:54:58,487 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:54:58,491 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:54:58,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:54:53" (1/3) ... [2019-10-15 00:54:58,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@273f750 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:54:58, skipping insertion in model container [2019-10-15 00:54:58,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:54:55" (2/3) ... [2019-10-15 00:54:58,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@273f750 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:54:58, skipping insertion in model container [2019-10-15 00:54:58,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:54:58" (3/3) ... [2019-10-15 00:54:58,495 INFO L109 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i [2019-10-15 00:54:58,507 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:54:58,521 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:54:58,534 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:54:58,576 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:54:58,576 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:54:58,576 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:54:58,576 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:54:58,577 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:54:58,577 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:54:58,577 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:54:58,577 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:54:58,629 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states. [2019-10-15 00:54:58,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-10-15 00:54:58,663 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:54:58,665 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:54:58,668 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:54:58,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:54:58,676 INFO L82 PathProgramCache]: Analyzing trace with hash -960615019, now seen corresponding path program 1 times [2019-10-15 00:54:58,687 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:54:58,687 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515436735] [2019-10-15 00:54:58,688 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:54:58,688 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:54:58,688 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:54:59,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:54:59,572 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2019-10-15 00:54:59,573 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515436735] [2019-10-15 00:54:59,574 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:54:59,574 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:54:59,574 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460534693] [2019-10-15 00:54:59,580 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:54:59,582 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:54:59,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:54:59,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:54:59,601 INFO L87 Difference]: Start difference. First operand 665 states. Second operand 3 states. [2019-10-15 00:54:59,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:54:59,784 INFO L93 Difference]: Finished difference Result 683 states and 977 transitions. [2019-10-15 00:54:59,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:54:59,787 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 150 [2019-10-15 00:54:59,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:54:59,828 INFO L225 Difference]: With dead ends: 683 [2019-10-15 00:54:59,829 INFO L226 Difference]: Without dead ends: 650 [2019-10-15 00:54:59,835 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:54:59,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2019-10-15 00:55:00,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 645. [2019-10-15 00:55:00,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 645 states. [2019-10-15 00:55:00,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 929 transitions. [2019-10-15 00:55:00,037 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 929 transitions. Word has length 150 [2019-10-15 00:55:00,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:55:00,045 INFO L462 AbstractCegarLoop]: Abstraction has 645 states and 929 transitions. [2019-10-15 00:55:00,045 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:55:00,045 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 929 transitions. [2019-10-15 00:55:00,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-10-15 00:55:00,056 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:55:00,057 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:55:00,059 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:55:00,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:55:00,060 INFO L82 PathProgramCache]: Analyzing trace with hash -903356717, now seen corresponding path program 1 times [2019-10-15 00:55:00,060 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:55:00,061 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662855098] [2019-10-15 00:55:00,061 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:55:00,061 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:55:00,061 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:55:00,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:55:00,413 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2019-10-15 00:55:00,413 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662855098] [2019-10-15 00:55:00,414 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:55:00,414 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:55:00,414 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498472248] [2019-10-15 00:55:00,417 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:55:00,421 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:55:00,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:55:00,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:55:00,422 INFO L87 Difference]: Start difference. First operand 645 states and 929 transitions. Second operand 3 states. [2019-10-15 00:55:00,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:55:00,528 INFO L93 Difference]: Finished difference Result 1252 states and 1813 transitions. [2019-10-15 00:55:00,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:55:00,529 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 150 [2019-10-15 00:55:00,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:55:00,544 INFO L225 Difference]: With dead ends: 1252 [2019-10-15 00:55:00,544 INFO L226 Difference]: Without dead ends: 1202 [2019-10-15 00:55:00,550 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:55:00,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1202 states. [2019-10-15 00:55:00,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1202 to 1201. [2019-10-15 00:55:00,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1201 states. [2019-10-15 00:55:00,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 1737 transitions. [2019-10-15 00:55:00,668 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 1737 transitions. Word has length 150 [2019-10-15 00:55:00,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:55:00,672 INFO L462 AbstractCegarLoop]: Abstraction has 1201 states and 1737 transitions. [2019-10-15 00:55:00,672 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:55:00,672 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 1737 transitions. [2019-10-15 00:55:00,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2019-10-15 00:55:00,692 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:55:00,693 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:55:00,693 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:55:00,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:55:00,694 INFO L82 PathProgramCache]: Analyzing trace with hash -421737455, now seen corresponding path program 1 times [2019-10-15 00:55:00,694 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:55:00,694 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744727045] [2019-10-15 00:55:00,694 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:55:00,695 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:55:00,695 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:55:00,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:55:00,962 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2019-10-15 00:55:00,963 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744727045] [2019-10-15 00:55:00,963 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:55:00,963 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:55:00,964 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834747916] [2019-10-15 00:55:00,965 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:55:00,965 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:55:00,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:55:00,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:55:00,966 INFO L87 Difference]: Start difference. First operand 1201 states and 1737 transitions. Second operand 3 states. [2019-10-15 00:55:01,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:55:01,121 INFO L93 Difference]: Finished difference Result 2854 states and 4128 transitions. [2019-10-15 00:55:01,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:55:01,122 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 217 [2019-10-15 00:55:01,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:55:01,134 INFO L225 Difference]: With dead ends: 2854 [2019-10-15 00:55:01,135 INFO L226 Difference]: Without dead ends: 1691 [2019-10-15 00:55:01,143 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:55:01,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1691 states. [2019-10-15 00:55:01,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1691 to 1665. [2019-10-15 00:55:01,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1665 states. [2019-10-15 00:55:01,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1665 states to 1665 states and 2409 transitions. [2019-10-15 00:55:01,240 INFO L78 Accepts]: Start accepts. Automaton has 1665 states and 2409 transitions. Word has length 217 [2019-10-15 00:55:01,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:55:01,241 INFO L462 AbstractCegarLoop]: Abstraction has 1665 states and 2409 transitions. [2019-10-15 00:55:01,241 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:55:01,241 INFO L276 IsEmpty]: Start isEmpty. Operand 1665 states and 2409 transitions. [2019-10-15 00:55:01,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2019-10-15 00:55:01,255 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:55:01,256 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2019-10-15 00:55:01,256 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:55:01,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:55:01,257 INFO L82 PathProgramCache]: Analyzing trace with hash 196012041, now seen corresponding path program 1 times [2019-10-15 00:55:01,257 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:55:01,257 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967502495] [2019-10-15 00:55:01,258 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:55:01,258 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:55:01,258 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:55:01,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:55:01,912 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 611 trivial. 0 not checked. [2019-10-15 00:55:01,912 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967502495] [2019-10-15 00:55:01,913 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138319477] [2019-10-15 00:55:01,913 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:55:02,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:55:02,717 INFO L256 TraceCheckSpWp]: Trace formula consists of 2746 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 00:55:02,745 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:55:03,048 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 212 proven. 0 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2019-10-15 00:55:03,048 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:55:03,849 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 614 trivial. 0 not checked. [2019-10-15 00:55:03,849 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:55:03,850 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 4] total 7 [2019-10-15 00:55:03,850 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712560192] [2019-10-15 00:55:03,851 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:55:03,851 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:55:03,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:55:03,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-10-15 00:55:03,852 INFO L87 Difference]: Start difference. First operand 1665 states and 2409 transitions. Second operand 3 states. [2019-10-15 00:55:03,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:55:03,991 INFO L93 Difference]: Finished difference Result 3284 states and 4769 transitions. [2019-10-15 00:55:03,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:55:03,991 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 433 [2019-10-15 00:55:03,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:55:04,015 INFO L225 Difference]: With dead ends: 3284 [2019-10-15 00:55:04,016 INFO L226 Difference]: Without dead ends: 1665 [2019-10-15 00:55:04,024 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 870 GetRequests, 865 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-10-15 00:55:04,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1665 states. [2019-10-15 00:55:04,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1665 to 1665. [2019-10-15 00:55:04,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1665 states. [2019-10-15 00:55:04,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1665 states to 1665 states and 2405 transitions. [2019-10-15 00:55:04,143 INFO L78 Accepts]: Start accepts. Automaton has 1665 states and 2405 transitions. Word has length 433 [2019-10-15 00:55:04,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:55:04,144 INFO L462 AbstractCegarLoop]: Abstraction has 1665 states and 2405 transitions. [2019-10-15 00:55:04,145 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:55:04,145 INFO L276 IsEmpty]: Start isEmpty. Operand 1665 states and 2405 transitions. [2019-10-15 00:55:04,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2019-10-15 00:55:04,158 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:55:04,159 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:55:04,371 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:55:04,372 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:55:04,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:55:04,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1626417134, now seen corresponding path program 1 times [2019-10-15 00:55:04,373 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:55:04,373 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314488603] [2019-10-15 00:55:04,373 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:55:04,373 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:55:04,374 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:55:04,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:55:04,933 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 614 trivial. 0 not checked. [2019-10-15 00:55:04,934 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314488603] [2019-10-15 00:55:04,934 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152085616] [2019-10-15 00:55:04,935 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:55:05,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:55:05,656 INFO L256 TraceCheckSpWp]: Trace formula consists of 2769 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-15 00:55:05,669 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:55:05,835 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 554 trivial. 0 not checked. [2019-10-15 00:55:05,835 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:55:06,488 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2019-10-15 00:55:06,488 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 00:55:06,488 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [5] total 7 [2019-10-15 00:55:06,489 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587063328] [2019-10-15 00:55:06,490 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:55:06,491 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:55:06,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:55:06,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-10-15 00:55:06,491 INFO L87 Difference]: Start difference. First operand 1665 states and 2405 transitions. Second operand 4 states. [2019-10-15 00:55:07,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:55:07,819 INFO L93 Difference]: Finished difference Result 3284 states and 4758 transitions. [2019-10-15 00:55:07,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:55:07,820 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 439 [2019-10-15 00:55:07,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:55:07,838 INFO L225 Difference]: With dead ends: 3284 [2019-10-15 00:55:07,839 INFO L226 Difference]: Without dead ends: 1665 [2019-10-15 00:55:07,848 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 882 GetRequests, 874 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-10-15 00:55:07,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1665 states. [2019-10-15 00:55:07,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1665 to 1665. [2019-10-15 00:55:07,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1665 states. [2019-10-15 00:55:07,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1665 states to 1665 states and 2403 transitions. [2019-10-15 00:55:07,947 INFO L78 Accepts]: Start accepts. Automaton has 1665 states and 2403 transitions. Word has length 439 [2019-10-15 00:55:07,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:55:07,948 INFO L462 AbstractCegarLoop]: Abstraction has 1665 states and 2403 transitions. [2019-10-15 00:55:07,948 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:55:07,950 INFO L276 IsEmpty]: Start isEmpty. Operand 1665 states and 2403 transitions. [2019-10-15 00:55:07,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2019-10-15 00:55:07,966 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:55:07,966 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:55:08,179 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:55:08,180 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:55:08,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:55:08,180 INFO L82 PathProgramCache]: Analyzing trace with hash -127095123, now seen corresponding path program 1 times [2019-10-15 00:55:08,180 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:55:08,181 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773023107] [2019-10-15 00:55:08,181 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:55:08,181 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:55:08,181 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:55:08,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:55:08,547 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 614 trivial. 0 not checked. [2019-10-15 00:55:08,548 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773023107] [2019-10-15 00:55:08,548 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708911158] [2019-10-15 00:55:08,548 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:55:09,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:55:09,285 INFO L256 TraceCheckSpWp]: Trace formula consists of 2755 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-15 00:55:09,299 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:55:09,439 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2019-10-15 00:55:09,439 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:55:10,106 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2019-10-15 00:55:10,106 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 00:55:10,106 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2019-10-15 00:55:10,107 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114993448] [2019-10-15 00:55:10,108 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:55:10,108 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:55:10,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:55:10,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-15 00:55:10,109 INFO L87 Difference]: Start difference. First operand 1665 states and 2403 transitions. Second operand 4 states. [2019-10-15 00:55:10,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:55:10,884 INFO L93 Difference]: Finished difference Result 4243 states and 6096 transitions. [2019-10-15 00:55:10,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:55:10,885 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 436 [2019-10-15 00:55:10,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:55:10,902 INFO L225 Difference]: With dead ends: 4243 [2019-10-15 00:55:10,902 INFO L226 Difference]: Without dead ends: 2541 [2019-10-15 00:55:10,912 INFO L600 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 [2019-10-15 00:55:10,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2541 states. [2019-10-15 00:55:11,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2541 to 2541. [2019-10-15 00:55:11,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2541 states. [2019-10-15 00:55:11,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2541 states to 2541 states and 3631 transitions. [2019-10-15 00:55:11,095 INFO L78 Accepts]: Start accepts. Automaton has 2541 states and 3631 transitions. Word has length 436 [2019-10-15 00:55:11,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:55:11,098 INFO L462 AbstractCegarLoop]: Abstraction has 2541 states and 3631 transitions. [2019-10-15 00:55:11,098 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:55:11,098 INFO L276 IsEmpty]: Start isEmpty. Operand 2541 states and 3631 transitions. [2019-10-15 00:55:11,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 446 [2019-10-15 00:55:11,111 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:55:11,112 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:55:11,320 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:55:11,320 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:55:11,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:55:11,321 INFO L82 PathProgramCache]: Analyzing trace with hash -982557520, now seen corresponding path program 1 times [2019-10-15 00:55:11,321 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:55:11,327 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698808828] [2019-10-15 00:55:11,327 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:55:11,328 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:55:11,328 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:55:11,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:55:11,823 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 620 trivial. 0 not checked. [2019-10-15 00:55:11,823 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698808828] [2019-10-15 00:55:11,824 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213896240] [2019-10-15 00:55:11,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:55:12,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:55:12,794 INFO L256 TraceCheckSpWp]: Trace formula consists of 2788 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 00:55:12,824 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:55:12,937 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 560 trivial. 0 not checked. [2019-10-15 00:55:12,938 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:55:13,556 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 622 trivial. 0 not checked. [2019-10-15 00:55:13,557 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 00:55:13,558 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 6 [2019-10-15 00:55:13,558 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791580904] [2019-10-15 00:55:13,560 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:55:13,561 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:55:13,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:55:13,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:55:13,562 INFO L87 Difference]: Start difference. First operand 2541 states and 3631 transitions. Second operand 3 states. [2019-10-15 00:55:14,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:55:14,210 INFO L93 Difference]: Finished difference Result 3797 states and 5398 transitions. [2019-10-15 00:55:14,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:55:14,211 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 445 [2019-10-15 00:55:14,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:55:14,219 INFO L225 Difference]: With dead ends: 3797 [2019-10-15 00:55:14,220 INFO L226 Difference]: Without dead ends: 1279 [2019-10-15 00:55:14,229 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 894 GetRequests, 890 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:55:14,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2019-10-15 00:55:14,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1279. [2019-10-15 00:55:14,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1279 states. [2019-10-15 00:55:14,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1279 states to 1279 states and 1778 transitions. [2019-10-15 00:55:14,303 INFO L78 Accepts]: Start accepts. Automaton has 1279 states and 1778 transitions. Word has length 445 [2019-10-15 00:55:14,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:55:14,304 INFO L462 AbstractCegarLoop]: Abstraction has 1279 states and 1778 transitions. [2019-10-15 00:55:14,309 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:55:14,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1279 states and 1778 transitions. [2019-10-15 00:55:14,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2019-10-15 00:55:14,318 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:55:14,319 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:55:14,527 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:55:14,528 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:55:14,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:55:14,528 INFO L82 PathProgramCache]: Analyzing trace with hash 82045149, now seen corresponding path program 1 times [2019-10-15 00:55:14,528 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:55:14,529 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684865277] [2019-10-15 00:55:14,529 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:55:14,529 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:55:14,529 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:55:14,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:55:15,085 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2019-10-15 00:55:15,086 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684865277] [2019-10-15 00:55:15,086 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:55:15,087 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 00:55:15,087 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281269503] [2019-10-15 00:55:15,088 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:55:15,089 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:55:15,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:55:15,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:55:15,090 INFO L87 Difference]: Start difference. First operand 1279 states and 1778 transitions. Second operand 5 states. [2019-10-15 00:55:16,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:55:16,826 INFO L93 Difference]: Finished difference Result 2470 states and 3457 transitions. [2019-10-15 00:55:16,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:55:16,826 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 467 [2019-10-15 00:55:16,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:55:16,837 INFO L225 Difference]: With dead ends: 2470 [2019-10-15 00:55:16,837 INFO L226 Difference]: Without dead ends: 1357 [2019-10-15 00:55:16,842 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:55:16,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1357 states. [2019-10-15 00:55:16,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1357 to 1338. [2019-10-15 00:55:16,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1338 states. [2019-10-15 00:55:16,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1338 states to 1338 states and 1877 transitions. [2019-10-15 00:55:16,921 INFO L78 Accepts]: Start accepts. Automaton has 1338 states and 1877 transitions. Word has length 467 [2019-10-15 00:55:16,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:55:16,922 INFO L462 AbstractCegarLoop]: Abstraction has 1338 states and 1877 transitions. [2019-10-15 00:55:16,922 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:55:16,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1338 states and 1877 transitions. [2019-10-15 00:55:16,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2019-10-15 00:55:16,932 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:55:16,933 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:55:16,934 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:55:16,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:55:16,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1715847753, now seen corresponding path program 1 times [2019-10-15 00:55:16,935 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:55:16,935 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312574326] [2019-10-15 00:55:16,935 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:55:16,935 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:55:16,935 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:55:17,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:55:17,399 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2019-10-15 00:55:17,400 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312574326] [2019-10-15 00:55:17,400 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:55:17,401 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:55:17,401 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607472742] [2019-10-15 00:55:17,402 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:55:17,403 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:55:17,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:55:17,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:55:17,404 INFO L87 Difference]: Start difference. First operand 1338 states and 1877 transitions. Second operand 3 states. [2019-10-15 00:55:17,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:55:17,536 INFO L93 Difference]: Finished difference Result 2571 states and 3615 transitions. [2019-10-15 00:55:17,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:55:17,537 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 476 [2019-10-15 00:55:17,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:55:17,548 INFO L225 Difference]: With dead ends: 2571 [2019-10-15 00:55:17,548 INFO L226 Difference]: Without dead ends: 1344 [2019-10-15 00:55:17,555 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:55:17,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2019-10-15 00:55:17,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 1342. [2019-10-15 00:55:17,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1342 states. [2019-10-15 00:55:17,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1342 states to 1342 states and 1880 transitions. [2019-10-15 00:55:17,645 INFO L78 Accepts]: Start accepts. Automaton has 1342 states and 1880 transitions. Word has length 476 [2019-10-15 00:55:17,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:55:17,646 INFO L462 AbstractCegarLoop]: Abstraction has 1342 states and 1880 transitions. [2019-10-15 00:55:17,646 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:55:17,646 INFO L276 IsEmpty]: Start isEmpty. Operand 1342 states and 1880 transitions. [2019-10-15 00:55:17,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2019-10-15 00:55:17,656 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:55:17,657 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:55:17,657 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:55:17,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:55:17,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1468050110, now seen corresponding path program 1 times [2019-10-15 00:55:17,658 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:55:17,659 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045334622] [2019-10-15 00:55:17,659 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:55:17,659 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:55:17,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:55:17,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:55:18,086 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 637 trivial. 0 not checked. [2019-10-15 00:55:18,087 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045334622] [2019-10-15 00:55:18,087 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:55:18,088 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 00:55:18,088 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731188599] [2019-10-15 00:55:18,089 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:55:18,089 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:55:18,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:55:18,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:55:18,090 INFO L87 Difference]: Start difference. First operand 1342 states and 1880 transitions. Second operand 5 states. [2019-10-15 00:55:18,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:55:18,161 INFO L93 Difference]: Finished difference Result 2304 states and 3243 transitions. [2019-10-15 00:55:18,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 00:55:18,162 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 485 [2019-10-15 00:55:18,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:55:18,171 INFO L225 Difference]: With dead ends: 2304 [2019-10-15 00:55:18,171 INFO L226 Difference]: Without dead ends: 1354 [2019-10-15 00:55:18,175 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:55:18,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2019-10-15 00:55:18,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1350. [2019-10-15 00:55:18,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1350 states. [2019-10-15 00:55:18,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 1890 transitions. [2019-10-15 00:55:18,243 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 1890 transitions. Word has length 485 [2019-10-15 00:55:18,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:55:18,244 INFO L462 AbstractCegarLoop]: Abstraction has 1350 states and 1890 transitions. [2019-10-15 00:55:18,244 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:55:18,244 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 1890 transitions. [2019-10-15 00:55:18,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2019-10-15 00:55:18,255 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:55:18,255 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:55:18,256 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:55:18,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:55:18,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1914638397, now seen corresponding path program 1 times [2019-10-15 00:55:18,257 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:55:18,257 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013849895] [2019-10-15 00:55:18,258 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:55:18,258 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:55:18,258 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:55:18,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:55:18,808 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 646 trivial. 0 not checked. [2019-10-15 00:55:18,809 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013849895] [2019-10-15 00:55:18,809 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:55:18,809 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-15 00:55:18,809 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954003407] [2019-10-15 00:55:18,810 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-15 00:55:18,811 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:55:18,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-15 00:55:18,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-10-15 00:55:18,812 INFO L87 Difference]: Start difference. First operand 1350 states and 1890 transitions. Second operand 8 states. [2019-10-15 00:55:19,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:55:19,461 INFO L93 Difference]: Finished difference Result 3286 states and 4618 transitions. [2019-10-15 00:55:19,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-15 00:55:19,461 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 493 [2019-10-15 00:55:19,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:55:19,477 INFO L225 Difference]: With dead ends: 3286 [2019-10-15 00:55:19,478 INFO L226 Difference]: Without dead ends: 2328 [2019-10-15 00:55:19,483 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2019-10-15 00:55:19,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2019-10-15 00:55:19,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 1360. [2019-10-15 00:55:19,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1360 states. [2019-10-15 00:55:19,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 1901 transitions. [2019-10-15 00:55:19,569 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 1901 transitions. Word has length 493 [2019-10-15 00:55:19,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:55:19,570 INFO L462 AbstractCegarLoop]: Abstraction has 1360 states and 1901 transitions. [2019-10-15 00:55:19,571 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-15 00:55:19,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 1901 transitions. [2019-10-15 00:55:19,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2019-10-15 00:55:19,580 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:55:19,582 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-15 00:55:19,583 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:55:19,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:55:19,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1092467419, now seen corresponding path program 1 times [2019-10-15 00:55:19,584 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:55:19,588 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021258317] [2019-10-15 00:55:19,589 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:55:19,589 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:55:19,589 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:55:19,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:55:20,084 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 623 trivial. 0 not checked. [2019-10-15 00:55:20,084 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021258317] [2019-10-15 00:55:20,085 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126641870] [2019-10-15 00:55:20,085 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:55:20,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:55:20,934 INFO L256 TraceCheckSpWp]: Trace formula consists of 2826 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:55:20,944 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:55:21,047 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2019-10-15 00:55:21,048 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:55:21,746 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2019-10-15 00:55:21,746 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:55:21,746 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 10 [2019-10-15 00:55:21,747 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983186689] [2019-10-15 00:55:21,747 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:55:21,748 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:55:21,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:55:21,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-10-15 00:55:21,748 INFO L87 Difference]: Start difference. First operand 1360 states and 1901 transitions. Second operand 5 states. [2019-10-15 00:55:21,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:55:21,837 INFO L93 Difference]: Finished difference Result 2637 states and 3702 transitions. [2019-10-15 00:55:21,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 00:55:21,838 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 479 [2019-10-15 00:55:21,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:55:21,847 INFO L225 Difference]: With dead ends: 2637 [2019-10-15 00:55:21,847 INFO L226 Difference]: Without dead ends: 1368 [2019-10-15 00:55:21,853 INFO L600 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 [2019-10-15 00:55:21,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1368 states. [2019-10-15 00:55:21,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1368 to 1362. [2019-10-15 00:55:21,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1362 states. [2019-10-15 00:55:21,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1362 states to 1362 states and 1905 transitions. [2019-10-15 00:55:21,927 INFO L78 Accepts]: Start accepts. Automaton has 1362 states and 1905 transitions. Word has length 479 [2019-10-15 00:55:21,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:55:21,928 INFO L462 AbstractCegarLoop]: Abstraction has 1362 states and 1905 transitions. [2019-10-15 00:55:21,928 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:55:21,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1362 states and 1905 transitions. [2019-10-15 00:55:21,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2019-10-15 00:55:21,942 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:55:21,943 INFO L380 BasicCegarLoop]: trace histogram [17, 17, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:55:22,161 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:55:22,162 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:55:22,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:55:22,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1098509229, now seen corresponding path program 1 times [2019-10-15 00:55:22,165 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:55:22,165 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372228340] [2019-10-15 00:55:22,166 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:55:22,166 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:55:22,166 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:55:22,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:55:22,830 INFO L134 CoverageAnalysis]: Checked inductivity of 824 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 802 trivial. 0 not checked. [2019-10-15 00:55:22,830 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372228340] [2019-10-15 00:55:22,831 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690767546] [2019-10-15 00:55:22,831 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:55:23,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:55:23,695 INFO L256 TraceCheckSpWp]: Trace formula consists of 2885 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-15 00:55:23,704 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:55:23,818 INFO L134 CoverageAnalysis]: Checked inductivity of 824 backedges. 264 proven. 0 refuted. 0 times theorem prover too weak. 560 trivial. 0 not checked. [2019-10-15 00:55:23,818 INFO L321 TraceCheckSpWp]: Computing backward predicates...