java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--gl620a.ko-entry_point.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 22:19:11,816 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 22:19:11,818 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 22:19:11,832 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 22:19:11,832 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 22:19:11,833 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 22:19:11,835 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 22:19:11,837 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 22:19:11,839 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 22:19:11,840 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 22:19:11,841 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 22:19:11,843 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 22:19:11,843 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 22:19:11,844 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 22:19:11,845 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 22:19:11,846 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 22:19:11,847 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 22:19:11,848 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 22:19:11,851 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 22:19:11,853 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 22:19:11,855 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 22:19:11,856 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 22:19:11,858 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 22:19:11,859 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 22:19:11,862 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 22:19:11,863 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 22:19:11,863 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 22:19:11,864 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 22:19:11,865 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 22:19:11,866 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 22:19:11,866 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 22:19:11,867 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 22:19:11,868 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 22:19:11,869 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 22:19:11,870 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 22:19:11,870 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 22:19:11,871 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 22:19:11,871 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 22:19:11,872 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 22:19:11,873 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 22:19:11,874 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 22:19:11,875 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 22:19:11,891 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 22:19:11,891 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 22:19:11,892 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 22:19:11,893 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 22:19:11,893 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 22:19:11,893 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 22:19:11,893 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 22:19:11,894 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 22:19:11,894 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 22:19:11,894 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 22:19:11,894 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 22:19:11,894 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 22:19:11,895 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 22:19:11,895 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 22:19:11,895 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 22:19:11,895 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 22:19:11,895 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 22:19:11,896 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 22:19:11,896 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 22:19:11,896 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 22:19:11,896 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 22:19:11,896 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 22:19:11,897 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 22:19:11,897 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 22:19:11,897 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 22:19:11,897 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 22:19:11,897 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 22:19:11,898 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 22:19:11,898 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-13 22:19:12,190 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 22:19:12,216 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 22:19:12,220 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 22:19:12,223 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 22:19:12,224 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 22:19:12,224 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--gl620a.ko-entry_point.cil.out.i [2019-10-13 22:19:12,317 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59d9e50f0/36d2a75c71664139b0ff849644d34e7f/FLAG90ea701fb [2019-10-13 22:19:13,199 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 22:19:13,201 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--gl620a.ko-entry_point.cil.out.i [2019-10-13 22:19:13,251 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59d9e50f0/36d2a75c71664139b0ff849644d34e7f/FLAG90ea701fb [2019-10-13 22:19:13,722 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59d9e50f0/36d2a75c71664139b0ff849644d34e7f [2019-10-13 22:19:13,734 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 22:19:13,736 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 22:19:13,737 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 22:19:13,738 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 22:19:13,742 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 22:19:13,743 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:19:13" (1/1) ... [2019-10-13 22:19:13,747 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@781867a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:19:13, skipping insertion in model container [2019-10-13 22:19:13,747 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:19:13" (1/1) ... [2019-10-13 22:19:13,756 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 22:19:13,888 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 22:19:15,313 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 22:19:15,351 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 22:19:15,588 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 22:19:15,710 INFO L192 MainTranslator]: Completed translation [2019-10-13 22:19:15,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:19:15 WrapperNode [2019-10-13 22:19:15,711 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 22:19:15,712 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 22:19:15,712 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 22:19:15,712 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 22:19:15,732 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:19:15" (1/1) ... [2019-10-13 22:19:15,732 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:19:15" (1/1) ... [2019-10-13 22:19:15,802 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:19:15" (1/1) ... [2019-10-13 22:19:15,803 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:19:15" (1/1) ... [2019-10-13 22:19:15,888 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:19:15" (1/1) ... [2019-10-13 22:19:15,970 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:19:15" (1/1) ... [2019-10-13 22:19:15,998 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:19:15" (1/1) ... [2019-10-13 22:19:16,026 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 22:19:16,027 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 22:19:16,028 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 22:19:16,028 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 22:19:16,032 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:19:15" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 22:19:16,134 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 22:19:16,135 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 22:19:16,135 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_read [2019-10-13 22:19:16,135 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_end_pointer [2019-10-13 22:19:16,136 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_cloned [2019-10-13 22:19:16,137 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_is_nonlinear [2019-10-13 22:19:16,138 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reset_tail_pointer [2019-10-13 22:19:16,139 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_set_tail_pointer [2019-10-13 22:19:16,139 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_headroom [2019-10-13 22:19:16,139 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_tailroom [2019-10-13 22:19:16,139 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2019-10-13 22:19:16,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2019-10-13 22:19:16,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2019-10-13 22:19:16,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_ptr [2019-10-13 22:19:16,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_ulong [2019-10-13 22:19:16,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2019-10-13 22:19:16,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2019-10-13 22:19:16,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2019-10-13 22:19:16,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_trap [2019-10-13 22:19:16,144 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_any [2019-10-13 22:19:16,144 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2019-10-13 22:19:16,144 INFO L138 BoogieDeclarations]: Found implementation of procedure genelink_rx_fixup [2019-10-13 22:19:16,145 INFO L138 BoogieDeclarations]: Found implementation of procedure genelink_tx_fixup [2019-10-13 22:19:16,145 INFO L138 BoogieDeclarations]: Found implementation of procedure genelink_bind [2019-10-13 22:19:16,145 INFO L138 BoogieDeclarations]: Found implementation of procedure gl620a_driver_init [2019-10-13 22:19:16,145 INFO L138 BoogieDeclarations]: Found implementation of procedure gl620a_driver_exit [2019-10-13 22:19:16,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize_driver_info_2 [2019-10-13 22:19:16,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_driver_1 [2019-10-13 22:19:16,146 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 22:19:16,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_consume_skb_5 [2019-10-13 22:19:16,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kfree_skb_6 [2019-10-13 22:19:16,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kfree_skb_7 [2019-10-13 22:19:16,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kfree_skb_8 [2019-10-13 22:19:16,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kfree_skb_11 [2019-10-13 22:19:16,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc_skb_12 [2019-10-13 22:19:16,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_register_driver_13 [2019-10-13 22:19:16,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_deregister_14 [2019-10-13 22:19:16,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_init [2019-10-13 22:19:16,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_add [2019-10-13 22:19:16,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_remove [2019-10-13 22:19:16,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_contains [2019-10-13 22:19:16,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_is_empty [2019-10-13 22:19:16,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2019-10-13 22:19:16,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_err_ptr [2019-10-13 22:19:16,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_ptr_err [2019-10-13 22:19:16,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err_or_null [2019-10-13 22:19:16,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2019-10-13 22:19:16,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize [2019-10-13 22:19:16,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free [2019-10-13 22:19:16,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free_int [2019-10-13 22:19:16,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_alloc_skb [2019-10-13 22:19:16,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_netdev_alloc_skb [2019-10-13 22:19:16,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_current [2019-10-13 22:19:16,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2019-10-13 22:19:16,150 INFO L138 BoogieDeclarations]: Found implementation of procedure __dev_kfree_skb_any [2019-10-13 22:19:16,150 INFO L138 BoogieDeclarations]: Found implementation of procedure __dynamic_netdev_dbg [2019-10-13 22:19:16,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_release_2 [2019-10-13 22:19:16,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_reset_resume_1 [2019-10-13 22:19:16,151 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_copy_expand [2019-10-13 22:19:16,152 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_pull [2019-10-13 22:19:16,152 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_push [2019-10-13 22:19:16,152 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2019-10-13 22:19:16,152 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_deregister [2019-10-13 22:19:16,152 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_register_driver [2019-10-13 22:19:16,153 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_disconnect [2019-10-13 22:19:16,153 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_probe [2019-10-13 22:19:16,153 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_resume [2019-10-13 22:19:16,153 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_skb_return [2019-10-13 22:19:16,153 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_suspend [2019-10-13 22:19:16,153 INFO L138 BoogieDeclarations]: Found implementation of procedure external_alloc [2019-10-13 22:19:16,154 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2019-10-13 22:19:16,154 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2019-10-13 22:19:16,154 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2019-10-13 22:19:16,155 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2019-10-13 22:19:16,155 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memmove [2019-10-13 22:19:16,155 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 22:19:16,156 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2019-10-13 22:19:16,156 INFO L130 BoogieDeclarations]: Found specification of procedure __dynamic_netdev_dbg [2019-10-13 22:19:16,156 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2019-10-13 22:19:16,156 INFO L130 BoogieDeclarations]: Found specification of procedure memmove [2019-10-13 22:19:16,157 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_read [2019-10-13 22:19:16,157 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 22:19:16,157 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kfree_skb_6 [2019-10-13 22:19:16,158 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kfree_skb_7 [2019-10-13 22:19:16,158 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kfree_skb_8 [2019-10-13 22:19:16,158 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kfree_skb_11 [2019-10-13 22:19:16,158 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_consume_skb_5 [2019-10-13 22:19:16,159 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc_skb_12 [2019-10-13 22:19:16,159 INFO L130 BoogieDeclarations]: Found specification of procedure skb_copy_expand [2019-10-13 22:19:16,160 INFO L130 BoogieDeclarations]: Found specification of procedure skb_end_pointer [2019-10-13 22:19:16,160 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-13 22:19:16,160 INFO L130 BoogieDeclarations]: Found specification of procedure skb_cloned [2019-10-13 22:19:16,160 INFO L130 BoogieDeclarations]: Found specification of procedure skb_is_nonlinear [2019-10-13 22:19:16,160 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reset_tail_pointer [2019-10-13 22:19:16,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 22:19:16,161 INFO L130 BoogieDeclarations]: Found specification of procedure skb_set_tail_pointer [2019-10-13 22:19:16,161 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2019-10-13 22:19:16,161 INFO L130 BoogieDeclarations]: Found specification of procedure skb_push [2019-10-13 22:19:16,161 INFO L130 BoogieDeclarations]: Found specification of procedure skb_pull [2019-10-13 22:19:16,161 INFO L130 BoogieDeclarations]: Found specification of procedure skb_headroom [2019-10-13 22:19:16,162 INFO L130 BoogieDeclarations]: Found specification of procedure skb_tailroom [2019-10-13 22:19:16,162 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2019-10-13 22:19:16,162 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free [2019-10-13 22:19:16,162 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 22:19:16,162 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-10-13 22:19:16,162 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 22:19:16,163 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2019-10-13 22:19:16,163 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_pointer [2019-10-13 22:19:16,163 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-13 22:19:16,163 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2019-10-13 22:19:16,163 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 22:19:16,164 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2019-10-13 22:19:16,164 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2019-10-13 22:19:16,164 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2019-10-13 22:19:16,164 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_ptr [2019-10-13 22:19:16,164 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_ulong [2019-10-13 22:19:16,165 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2019-10-13 22:19:16,165 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2019-10-13 22:19:16,165 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_trap [2019-10-13 22:19:16,166 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize_driver_info_2 [2019-10-13 22:19:16,166 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_driver_1 [2019-10-13 22:19:16,166 INFO L130 BoogieDeclarations]: Found specification of procedure __dev_kfree_skb_any [2019-10-13 22:19:16,166 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_any [2019-10-13 22:19:16,167 INFO L130 BoogieDeclarations]: Found specification of procedure usb_register_driver [2019-10-13 22:19:16,168 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_register_driver_13 [2019-10-13 22:19:16,168 INFO L130 BoogieDeclarations]: Found specification of procedure usb_deregister [2019-10-13 22:19:16,169 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_deregister_14 [2019-10-13 22:19:16,169 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2019-10-13 22:19:16,169 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2019-10-13 22:19:16,169 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_probe [2019-10-13 22:19:16,169 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_suspend [2019-10-13 22:19:16,170 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_resume [2019-10-13 22:19:16,170 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_disconnect [2019-10-13 22:19:16,171 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_skb_return [2019-10-13 22:19:16,174 INFO L130 BoogieDeclarations]: Found specification of procedure genelink_rx_fixup [2019-10-13 22:19:16,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 22:19:16,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2019-10-13 22:19:16,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 22:19:16,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-13 22:19:16,176 INFO L130 BoogieDeclarations]: Found specification of procedure genelink_tx_fixup [2019-10-13 22:19:16,176 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memmove [2019-10-13 22:19:16,176 INFO L130 BoogieDeclarations]: Found specification of procedure genelink_bind [2019-10-13 22:19:16,176 INFO L130 BoogieDeclarations]: Found specification of procedure gl620a_driver_init [2019-10-13 22:19:16,177 INFO L130 BoogieDeclarations]: Found specification of procedure gl620a_driver_exit [2019-10-13 22:19:16,183 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_reset_resume_1 [2019-10-13 22:19:16,184 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_release_2 [2019-10-13 22:19:16,184 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize [2019-10-13 22:19:16,184 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2019-10-13 22:19:16,184 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 22:19:16,184 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2019-10-13 22:19:16,185 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_init [2019-10-13 22:19:16,185 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_add [2019-10-13 22:19:16,185 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_remove [2019-10-13 22:19:16,185 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_contains [2019-10-13 22:19:16,186 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_is_empty [2019-10-13 22:19:16,186 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2019-10-13 22:19:16,186 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_err_ptr [2019-10-13 22:19:16,187 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_ptr_err [2019-10-13 22:19:16,187 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err_or_null [2019-10-13 22:19:16,187 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free_int [2019-10-13 22:19:16,187 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_netdev_alloc_skb [2019-10-13 22:19:16,187 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_alloc_skb [2019-10-13 22:19:16,187 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_current [2019-10-13 22:19:16,187 INFO L130 BoogieDeclarations]: Found specification of procedure external_alloc [2019-10-13 22:19:16,188 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-13 22:19:16,188 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2019-10-13 22:19:16,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 22:19:16,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-13 22:19:16,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-10-13 22:19:16,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2019-10-13 22:19:16,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 22:19:16,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2019-10-13 22:19:16,189 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2019-10-13 22:19:16,189 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2019-10-13 22:19:16,908 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2019-10-13 22:19:21,326 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 22:19:21,326 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-13 22:19:21,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:19:21 BoogieIcfgContainer [2019-10-13 22:19:21,328 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 22:19:21,331 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 22:19:21,331 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 22:19:21,335 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 22:19:21,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:19:13" (1/3) ... [2019-10-13 22:19:21,337 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57e87ec8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:19:21, skipping insertion in model container [2019-10-13 22:19:21,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:19:15" (2/3) ... [2019-10-13 22:19:21,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57e87ec8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:19:21, skipping insertion in model container [2019-10-13 22:19:21,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:19:21" (3/3) ... [2019-10-13 22:19:21,343 INFO L109 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--gl620a.ko-entry_point.cil.out.i [2019-10-13 22:19:21,355 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 22:19:21,367 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 22:19:21,386 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 22:19:21,424 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 22:19:21,424 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 22:19:21,424 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 22:19:21,425 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 22:19:21,425 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 22:19:21,425 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 22:19:21,425 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 22:19:21,425 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 22:19:21,455 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states. [2019-10-13 22:19:21,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-10-13 22:19:21,470 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 22:19:21,472 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 22:19:21,475 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 22:19:21,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 22:19:21,483 INFO L82 PathProgramCache]: Analyzing trace with hash -76993048, now seen corresponding path program 1 times [2019-10-13 22:19:21,498 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 22:19:21,498 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37010654] [2019-10-13 22:19:21,499 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:19:21,499 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:19:21,499 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 22:19:21,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:19:22,141 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 22:19:22,142 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37010654] [2019-10-13 22:19:22,143 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 22:19:22,143 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 22:19:22,144 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470120751] [2019-10-13 22:19:22,149 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 22:19:22,149 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 22:19:22,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 22:19:22,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 22:19:22,170 INFO L87 Difference]: Start difference. First operand 316 states. Second operand 3 states. [2019-10-13 22:19:22,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 22:19:22,864 INFO L93 Difference]: Finished difference Result 831 states and 1059 transitions. [2019-10-13 22:19:22,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 22:19:22,866 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 59 [2019-10-13 22:19:22,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 22:19:22,905 INFO L225 Difference]: With dead ends: 831 [2019-10-13 22:19:22,905 INFO L226 Difference]: Without dead ends: 527 [2019-10-13 22:19:22,920 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 22:19:22,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2019-10-13 22:19:23,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 527. [2019-10-13 22:19:23,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 527 states. [2019-10-13 22:19:23,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 657 transitions. [2019-10-13 22:19:23,047 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 657 transitions. Word has length 59 [2019-10-13 22:19:23,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 22:19:23,048 INFO L462 AbstractCegarLoop]: Abstraction has 527 states and 657 transitions. [2019-10-13 22:19:23,048 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 22:19:23,048 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 657 transitions. [2019-10-13 22:19:23,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-10-13 22:19:23,059 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 22:19:23,060 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2019-10-13 22:19:23,060 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 22:19:23,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 22:19:23,061 INFO L82 PathProgramCache]: Analyzing trace with hash -912083698, now seen corresponding path program 1 times [2019-10-13 22:19:23,062 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 22:19:23,062 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125468691] [2019-10-13 22:19:23,062 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:19:23,062 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:19:23,063 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 22:19:23,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:19:23,366 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 22:19:23,366 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125468691] [2019-10-13 22:19:23,367 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 22:19:23,367 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 22:19:23,367 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909127803] [2019-10-13 22:19:23,369 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 22:19:23,369 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 22:19:23,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 22:19:23,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 22:19:23,370 INFO L87 Difference]: Start difference. First operand 527 states and 657 transitions. Second operand 6 states. [2019-10-13 22:19:24,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 22:19:24,286 INFO L93 Difference]: Finished difference Result 1036 states and 1300 transitions. [2019-10-13 22:19:24,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 22:19:24,287 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2019-10-13 22:19:24,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 22:19:24,299 INFO L225 Difference]: With dead ends: 1036 [2019-10-13 22:19:24,300 INFO L226 Difference]: Without dead ends: 1015 [2019-10-13 22:19:24,301 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-10-13 22:19:24,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1015 states. [2019-10-13 22:19:24,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1015 to 1015. [2019-10-13 22:19:24,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1015 states. [2019-10-13 22:19:24,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 1277 transitions. [2019-10-13 22:19:24,470 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 1277 transitions. Word has length 73 [2019-10-13 22:19:24,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 22:19:24,471 INFO L462 AbstractCegarLoop]: Abstraction has 1015 states and 1277 transitions. [2019-10-13 22:19:24,472 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 22:19:24,472 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 1277 transitions. [2019-10-13 22:19:24,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-10-13 22:19:24,483 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 22:19:24,483 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2019-10-13 22:19:24,484 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 22:19:24,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 22:19:24,485 INFO L82 PathProgramCache]: Analyzing trace with hash -989621794, now seen corresponding path program 1 times [2019-10-13 22:19:24,485 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 22:19:24,485 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440432926] [2019-10-13 22:19:24,486 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:19:24,486 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:19:24,486 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 22:19:24,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:19:24,731 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-13 22:19:24,731 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440432926] [2019-10-13 22:19:24,731 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 22:19:24,732 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 22:19:24,732 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151547426] [2019-10-13 22:19:24,733 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 22:19:24,733 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 22:19:24,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 22:19:24,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 22:19:24,733 INFO L87 Difference]: Start difference. First operand 1015 states and 1277 transitions. Second operand 3 states. [2019-10-13 22:19:24,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 22:19:24,843 INFO L93 Difference]: Finished difference Result 2293 states and 2898 transitions. [2019-10-13 22:19:24,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 22:19:24,844 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2019-10-13 22:19:24,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 22:19:24,861 INFO L225 Difference]: With dead ends: 2293 [2019-10-13 22:19:24,861 INFO L226 Difference]: Without dead ends: 1300 [2019-10-13 22:19:24,865 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 22:19:24,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2019-10-13 22:19:24,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 1279. [2019-10-13 22:19:24,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1279 states. [2019-10-13 22:19:24,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1279 states to 1279 states and 1623 transitions. [2019-10-13 22:19:24,931 INFO L78 Accepts]: Start accepts. Automaton has 1279 states and 1623 transitions. Word has length 138 [2019-10-13 22:19:24,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 22:19:24,931 INFO L462 AbstractCegarLoop]: Abstraction has 1279 states and 1623 transitions. [2019-10-13 22:19:24,931 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 22:19:24,932 INFO L276 IsEmpty]: Start isEmpty. Operand 1279 states and 1623 transitions. [2019-10-13 22:19:24,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-10-13 22:19:24,945 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 22:19:24,945 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 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] [2019-10-13 22:19:24,945 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 22:19:24,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 22:19:24,946 INFO L82 PathProgramCache]: Analyzing trace with hash 892569057, now seen corresponding path program 1 times [2019-10-13 22:19:24,946 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 22:19:24,947 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016902128] [2019-10-13 22:19:24,948 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:19:24,948 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:19:24,948 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 22:19:25,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:19:25,178 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-13 22:19:25,178 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016902128] [2019-10-13 22:19:25,179 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 22:19:25,179 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 22:19:25,180 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523672699] [2019-10-13 22:19:25,181 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 22:19:25,182 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 22:19:25,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 22:19:25,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 22:19:25,182 INFO L87 Difference]: Start difference. First operand 1279 states and 1623 transitions. Second operand 3 states. [2019-10-13 22:19:25,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 22:19:25,597 INFO L93 Difference]: Finished difference Result 3417 states and 4330 transitions. [2019-10-13 22:19:25,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 22:19:25,597 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 170 [2019-10-13 22:19:25,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 22:19:25,610 INFO L225 Difference]: With dead ends: 3417 [2019-10-13 22:19:25,610 INFO L226 Difference]: Without dead ends: 2168 [2019-10-13 22:19:25,614 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 22:19:25,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2168 states. [2019-10-13 22:19:25,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2168 to 2147. [2019-10-13 22:19:25,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2147 states. [2019-10-13 22:19:25,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2147 states to 2147 states and 2693 transitions. [2019-10-13 22:19:25,711 INFO L78 Accepts]: Start accepts. Automaton has 2147 states and 2693 transitions. Word has length 170 [2019-10-13 22:19:25,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 22:19:25,712 INFO L462 AbstractCegarLoop]: Abstraction has 2147 states and 2693 transitions. [2019-10-13 22:19:25,712 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 22:19:25,712 INFO L276 IsEmpty]: Start isEmpty. Operand 2147 states and 2693 transitions. [2019-10-13 22:19:25,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-10-13 22:19:25,718 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 22:19:25,718 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 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] [2019-10-13 22:19:25,719 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 22:19:25,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 22:19:25,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1140267243, now seen corresponding path program 1 times [2019-10-13 22:19:25,719 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 22:19:25,720 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497165258] [2019-10-13 22:19:25,720 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:19:25,720 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:19:25,720 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 22:19:25,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:19:25,955 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2019-10-13 22:19:25,956 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497165258] [2019-10-13 22:19:25,956 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 22:19:25,957 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 22:19:25,957 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784986287] [2019-10-13 22:19:25,958 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 22:19:25,958 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 22:19:25,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 22:19:25,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 22:19:25,959 INFO L87 Difference]: Start difference. First operand 2147 states and 2693 transitions. Second operand 5 states. [2019-10-13 22:19:26,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 22:19:26,091 INFO L93 Difference]: Finished difference Result 4318 states and 5459 transitions. [2019-10-13 22:19:26,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 22:19:26,092 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 170 [2019-10-13 22:19:26,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 22:19:26,114 INFO L225 Difference]: With dead ends: 4318 [2019-10-13 22:19:26,114 INFO L226 Difference]: Without dead ends: 2201 [2019-10-13 22:19:26,128 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 22:19:26,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2201 states. [2019-10-13 22:19:26,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2201 to 2187. [2019-10-13 22:19:26,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2187 states. [2019-10-13 22:19:26,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 2741 transitions. [2019-10-13 22:19:26,359 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 2741 transitions. Word has length 170 [2019-10-13 22:19:26,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 22:19:26,362 INFO L462 AbstractCegarLoop]: Abstraction has 2187 states and 2741 transitions. [2019-10-13 22:19:26,362 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 22:19:26,362 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 2741 transitions. [2019-10-13 22:19:26,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-10-13 22:19:26,370 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 22:19:26,370 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 5, 3, 3, 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] [2019-10-13 22:19:26,370 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 22:19:26,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 22:19:26,371 INFO L82 PathProgramCache]: Analyzing trace with hash -43516539, now seen corresponding path program 1 times [2019-10-13 22:19:26,371 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 22:19:26,372 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217365345] [2019-10-13 22:19:26,372 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:19:26,372 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:19:26,372 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 22:19:26,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:19:26,686 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-10-13 22:19:26,687 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217365345] [2019-10-13 22:19:26,688 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241274899] [2019-10-13 22:19:26,688 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 22:19:27,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:19:27,149 INFO L256 TraceCheckSpWp]: Trace formula consists of 1835 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 22:19:27,165 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 22:19:27,244 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-10-13 22:19:27,244 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 22:19:27,532 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-10-13 22:19:27,532 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 22:19:27,533 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-10-13 22:19:27,533 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230195636] [2019-10-13 22:19:27,534 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 22:19:27,534 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 22:19:27,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 22:19:27,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-10-13 22:19:27,535 INFO L87 Difference]: Start difference. First operand 2187 states and 2741 transitions. Second operand 4 states. [2019-10-13 22:19:27,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 22:19:27,652 INFO L93 Difference]: Finished difference Result 4352 states and 5459 transitions. [2019-10-13 22:19:27,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 22:19:27,653 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 174 [2019-10-13 22:19:27,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 22:19:27,668 INFO L225 Difference]: With dead ends: 4352 [2019-10-13 22:19:27,668 INFO L226 Difference]: Without dead ends: 2188 [2019-10-13 22:19:27,678 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 344 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-13 22:19:27,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2188 states. [2019-10-13 22:19:27,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2188 to 2188. [2019-10-13 22:19:27,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2188 states. [2019-10-13 22:19:27,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 2742 transitions. [2019-10-13 22:19:27,799 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 2742 transitions. Word has length 174 [2019-10-13 22:19:27,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 22:19:27,799 INFO L462 AbstractCegarLoop]: Abstraction has 2188 states and 2742 transitions. [2019-10-13 22:19:27,799 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 22:19:27,800 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 2742 transitions. [2019-10-13 22:19:27,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-10-13 22:19:27,806 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 22:19:27,806 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 5, 3, 3, 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] [2019-10-13 22:19:28,015 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 22:19:28,015 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 22:19:28,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 22:19:28,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1783710495, now seen corresponding path program 1 times [2019-10-13 22:19:28,016 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 22:19:28,016 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238665259] [2019-10-13 22:19:28,017 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:19:28,017 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:19:28,017 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 22:19:28,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:19:28,355 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-10-13 22:19:28,356 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238665259] [2019-10-13 22:19:28,356 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604428115] [2019-10-13 22:19:28,356 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 22:19:28,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:19:28,868 INFO L256 TraceCheckSpWp]: Trace formula consists of 1847 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 22:19:28,882 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 22:19:28,953 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 38 proven. 1 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-10-13 22:19:28,954 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 22:19:29,255 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-10-13 22:19:29,256 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [135467326] [2019-10-13 22:19:29,301 INFO L162 IcfgInterpreter]: Started Sifa with 136 locations of interest [2019-10-13 22:19:29,301 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 22:19:29,311 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 22:19:29,335 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 22:19:29,336 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs