/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/ldv-linux-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-fb55353 [2019-11-07 02:49:10,945 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 02:49:10,948 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 02:49:10,967 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 02:49:10,968 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 02:49:10,970 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 02:49:10,971 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 02:49:10,984 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 02:49:10,986 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 02:49:10,988 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 02:49:10,988 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 02:49:10,990 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 02:49:10,990 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 02:49:10,992 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 02:49:10,994 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 02:49:10,996 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 02:49:10,998 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 02:49:10,999 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 02:49:11,000 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 02:49:11,002 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 02:49:11,004 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 02:49:11,004 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 02:49:11,005 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 02:49:11,006 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 02:49:11,008 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 02:49:11,008 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 02:49:11,009 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 02:49:11,009 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 02:49:11,010 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 02:49:11,012 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 02:49:11,013 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 02:49:11,014 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 02:49:11,014 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 02:49:11,015 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 02:49:11,016 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 02:49:11,016 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 02:49:11,017 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 02:49:11,017 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 02:49:11,017 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 02:49:11,018 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 02:49:11,019 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 02:49:11,020 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-07 02:49:11,034 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 02:49:11,034 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 02:49:11,035 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 02:49:11,035 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 02:49:11,036 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 02:49:11,036 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 02:49:11,036 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 02:49:11,036 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 02:49:11,036 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 02:49:11,037 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 02:49:11,037 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 02:49:11,037 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 02:49:11,037 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 02:49:11,037 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 02:49:11,038 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 02:49:11,038 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 02:49:11,038 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 02:49:11,038 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 02:49:11,038 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 02:49:11,039 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 02:49:11,039 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 02:49:11,039 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 02:49:11,039 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 02:49:11,039 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 02:49:11,040 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 02:49:11,040 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 02:49:11,040 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 02:49:11,040 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 02:49:11,040 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-11-07 02:49:11,330 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 02:49:11,343 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 02:49:11,347 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 02:49:11,348 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 02:49:11,349 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 02:49:11,349 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--gl620a.ko-entry_point.cil.out.i [2019-11-07 02:49:11,415 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/543bb388b/00e5f90f97774d61a45bb336b206d5af/FLAG4d15e8107 [2019-11-07 02:49:12,188 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 02:49:12,189 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--gl620a.ko-entry_point.cil.out.i [2019-11-07 02:49:12,234 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/543bb388b/00e5f90f97774d61a45bb336b206d5af/FLAG4d15e8107 [2019-11-07 02:49:12,257 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/543bb388b/00e5f90f97774d61a45bb336b206d5af [2019-11-07 02:49:12,266 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 02:49:12,267 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 02:49:12,268 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 02:49:12,268 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 02:49:12,272 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 02:49:12,273 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:49:12" (1/1) ... [2019-11-07 02:49:12,275 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5df597fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:49:12, skipping insertion in model container [2019-11-07 02:49:12,275 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:49:12" (1/1) ... [2019-11-07 02:49:12,283 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 02:49:12,396 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 02:49:13,706 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 02:49:13,762 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 02:49:14,103 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 02:49:14,199 INFO L192 MainTranslator]: Completed translation [2019-11-07 02:49:14,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:49:14 WrapperNode [2019-11-07 02:49:14,200 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 02:49:14,207 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 02:49:14,207 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 02:49:14,208 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 02:49:14,224 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:49:14" (1/1) ... [2019-11-07 02:49:14,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:49:14" (1/1) ... [2019-11-07 02:49:14,264 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:49:14" (1/1) ... [2019-11-07 02:49:14,265 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:49:14" (1/1) ... [2019-11-07 02:49:14,365 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:49:14" (1/1) ... [2019-11-07 02:49:14,377 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:49:14" (1/1) ... [2019-11-07 02:49:14,394 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:49:14" (1/1) ... [2019-11-07 02:49:14,411 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 02:49:14,412 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 02:49:14,413 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 02:49:14,413 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 02:49:14,414 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:49:14" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 02:49:14,486 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 02:49:14,486 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 02:49:14,487 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_read [2019-11-07 02:49:14,487 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_end_pointer [2019-11-07 02:49:14,487 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_cloned [2019-11-07 02:49:14,488 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_is_nonlinear [2019-11-07 02:49:14,489 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reset_tail_pointer [2019-11-07 02:49:14,490 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_set_tail_pointer [2019-11-07 02:49:14,490 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_headroom [2019-11-07 02:49:14,490 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_tailroom [2019-11-07 02:49:14,490 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2019-11-07 02:49:14,491 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2019-11-07 02:49:14,491 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2019-11-07 02:49:14,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_ptr [2019-11-07 02:49:14,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_ulong [2019-11-07 02:49:14,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2019-11-07 02:49:14,496 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2019-11-07 02:49:14,496 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2019-11-07 02:49:14,496 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_trap [2019-11-07 02:49:14,497 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_any [2019-11-07 02:49:14,497 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2019-11-07 02:49:14,497 INFO L138 BoogieDeclarations]: Found implementation of procedure genelink_rx_fixup [2019-11-07 02:49:14,497 INFO L138 BoogieDeclarations]: Found implementation of procedure genelink_tx_fixup [2019-11-07 02:49:14,497 INFO L138 BoogieDeclarations]: Found implementation of procedure genelink_bind [2019-11-07 02:49:14,497 INFO L138 BoogieDeclarations]: Found implementation of procedure gl620a_driver_init [2019-11-07 02:49:14,498 INFO L138 BoogieDeclarations]: Found implementation of procedure gl620a_driver_exit [2019-11-07 02:49:14,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize_driver_info_2 [2019-11-07 02:49:14,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_driver_1 [2019-11-07 02:49:14,498 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 02:49:14,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_consume_skb_5 [2019-11-07 02:49:14,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kfree_skb_6 [2019-11-07 02:49:14,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kfree_skb_7 [2019-11-07 02:49:14,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kfree_skb_8 [2019-11-07 02:49:14,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kfree_skb_11 [2019-11-07 02:49:14,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc_skb_12 [2019-11-07 02:49:14,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_register_driver_13 [2019-11-07 02:49:14,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_deregister_14 [2019-11-07 02:49:14,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_init [2019-11-07 02:49:14,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_add [2019-11-07 02:49:14,500 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_remove [2019-11-07 02:49:14,500 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_contains [2019-11-07 02:49:14,500 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_is_empty [2019-11-07 02:49:14,500 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2019-11-07 02:49:14,500 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_err_ptr [2019-11-07 02:49:14,500 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_ptr_err [2019-11-07 02:49:14,500 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err_or_null [2019-11-07 02:49:14,501 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2019-11-07 02:49:14,501 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize [2019-11-07 02:49:14,501 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free [2019-11-07 02:49:14,501 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free_int [2019-11-07 02:49:14,501 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_alloc_skb [2019-11-07 02:49:14,501 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_netdev_alloc_skb [2019-11-07 02:49:14,501 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_current [2019-11-07 02:49:14,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2019-11-07 02:49:14,502 INFO L138 BoogieDeclarations]: Found implementation of procedure __dev_kfree_skb_any [2019-11-07 02:49:14,502 INFO L138 BoogieDeclarations]: Found implementation of procedure __dynamic_netdev_dbg [2019-11-07 02:49:14,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_release_2 [2019-11-07 02:49:14,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_reset_resume_1 [2019-11-07 02:49:14,502 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_copy_expand [2019-11-07 02:49:14,503 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_pull [2019-11-07 02:49:14,503 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_push [2019-11-07 02:49:14,503 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2019-11-07 02:49:14,503 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_deregister [2019-11-07 02:49:14,503 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_register_driver [2019-11-07 02:49:14,503 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_disconnect [2019-11-07 02:49:14,504 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_probe [2019-11-07 02:49:14,504 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_resume [2019-11-07 02:49:14,504 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_skb_return [2019-11-07 02:49:14,504 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_suspend [2019-11-07 02:49:14,504 INFO L138 BoogieDeclarations]: Found implementation of procedure external_alloc [2019-11-07 02:49:14,504 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2019-11-07 02:49:14,505 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2019-11-07 02:49:14,505 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2019-11-07 02:49:14,505 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2019-11-07 02:49:14,505 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memmove [2019-11-07 02:49:14,505 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 02:49:14,505 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2019-11-07 02:49:14,506 INFO L130 BoogieDeclarations]: Found specification of procedure __dynamic_netdev_dbg [2019-11-07 02:49:14,506 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2019-11-07 02:49:14,506 INFO L130 BoogieDeclarations]: Found specification of procedure memmove [2019-11-07 02:49:14,506 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_read [2019-11-07 02:49:14,506 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 02:49:14,506 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kfree_skb_6 [2019-11-07 02:49:14,506 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kfree_skb_7 [2019-11-07 02:49:14,507 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kfree_skb_8 [2019-11-07 02:49:14,507 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kfree_skb_11 [2019-11-07 02:49:14,507 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_consume_skb_5 [2019-11-07 02:49:14,507 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc_skb_12 [2019-11-07 02:49:14,507 INFO L130 BoogieDeclarations]: Found specification of procedure skb_copy_expand [2019-11-07 02:49:14,507 INFO L130 BoogieDeclarations]: Found specification of procedure skb_end_pointer [2019-11-07 02:49:14,508 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-07 02:49:14,508 INFO L130 BoogieDeclarations]: Found specification of procedure skb_cloned [2019-11-07 02:49:14,508 INFO L130 BoogieDeclarations]: Found specification of procedure skb_is_nonlinear [2019-11-07 02:49:14,508 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reset_tail_pointer [2019-11-07 02:49:14,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 02:49:14,508 INFO L130 BoogieDeclarations]: Found specification of procedure skb_set_tail_pointer [2019-11-07 02:49:14,508 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2019-11-07 02:49:14,509 INFO L130 BoogieDeclarations]: Found specification of procedure skb_push [2019-11-07 02:49:14,509 INFO L130 BoogieDeclarations]: Found specification of procedure skb_pull [2019-11-07 02:49:14,509 INFO L130 BoogieDeclarations]: Found specification of procedure skb_headroom [2019-11-07 02:49:14,509 INFO L130 BoogieDeclarations]: Found specification of procedure skb_tailroom [2019-11-07 02:49:14,509 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2019-11-07 02:49:14,509 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free [2019-11-07 02:49:14,509 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-07 02:49:14,510 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-07 02:49:14,510 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 02:49:14,510 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2019-11-07 02:49:14,510 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_pointer [2019-11-07 02:49:14,510 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-07 02:49:14,510 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2019-11-07 02:49:14,510 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-07 02:49:14,511 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2019-11-07 02:49:14,511 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2019-11-07 02:49:14,511 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2019-11-07 02:49:14,511 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_ptr [2019-11-07 02:49:14,511 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_ulong [2019-11-07 02:49:14,511 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2019-11-07 02:49:14,511 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2019-11-07 02:49:14,512 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_trap [2019-11-07 02:49:14,512 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize_driver_info_2 [2019-11-07 02:49:14,512 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_driver_1 [2019-11-07 02:49:14,512 INFO L130 BoogieDeclarations]: Found specification of procedure __dev_kfree_skb_any [2019-11-07 02:49:14,512 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_any [2019-11-07 02:49:14,512 INFO L130 BoogieDeclarations]: Found specification of procedure usb_register_driver [2019-11-07 02:49:14,513 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_register_driver_13 [2019-11-07 02:49:14,513 INFO L130 BoogieDeclarations]: Found specification of procedure usb_deregister [2019-11-07 02:49:14,513 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_deregister_14 [2019-11-07 02:49:14,513 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2019-11-07 02:49:14,513 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2019-11-07 02:49:14,513 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_probe [2019-11-07 02:49:14,513 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_suspend [2019-11-07 02:49:14,514 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_resume [2019-11-07 02:49:14,514 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_disconnect [2019-11-07 02:49:14,516 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_skb_return [2019-11-07 02:49:14,519 INFO L130 BoogieDeclarations]: Found specification of procedure genelink_rx_fixup [2019-11-07 02:49:14,519 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 02:49:14,519 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2019-11-07 02:49:14,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 02:49:14,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-07 02:49:14,520 INFO L130 BoogieDeclarations]: Found specification of procedure genelink_tx_fixup [2019-11-07 02:49:14,520 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memmove [2019-11-07 02:49:14,520 INFO L130 BoogieDeclarations]: Found specification of procedure genelink_bind [2019-11-07 02:49:14,520 INFO L130 BoogieDeclarations]: Found specification of procedure gl620a_driver_init [2019-11-07 02:49:14,520 INFO L130 BoogieDeclarations]: Found specification of procedure gl620a_driver_exit [2019-11-07 02:49:14,521 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_reset_resume_1 [2019-11-07 02:49:14,521 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_release_2 [2019-11-07 02:49:14,521 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize [2019-11-07 02:49:14,521 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2019-11-07 02:49:14,521 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 02:49:14,521 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2019-11-07 02:49:14,521 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_init [2019-11-07 02:49:14,522 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_add [2019-11-07 02:49:14,523 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_remove [2019-11-07 02:49:14,523 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_contains [2019-11-07 02:49:14,523 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_is_empty [2019-11-07 02:49:14,523 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2019-11-07 02:49:14,523 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_err_ptr [2019-11-07 02:49:14,523 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_ptr_err [2019-11-07 02:49:14,524 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err_or_null [2019-11-07 02:49:14,524 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free_int [2019-11-07 02:49:14,524 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_netdev_alloc_skb [2019-11-07 02:49:14,524 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_alloc_skb [2019-11-07 02:49:14,524 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_current [2019-11-07 02:49:14,524 INFO L130 BoogieDeclarations]: Found specification of procedure external_alloc [2019-11-07 02:49:14,524 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-07 02:49:14,524 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2019-11-07 02:49:14,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 02:49:14,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-07 02:49:14,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-07 02:49:14,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2019-11-07 02:49:14,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 02:49:14,525 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2019-11-07 02:49:14,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2019-11-07 02:49:14,526 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2019-11-07 02:49:15,120 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2019-11-07 02:49:19,021 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 02:49:19,023 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-07 02:49:19,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:49:19 BoogieIcfgContainer [2019-11-07 02:49:19,025 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 02:49:19,027 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 02:49:19,027 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 02:49:19,031 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 02:49:19,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:49:12" (1/3) ... [2019-11-07 02:49:19,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@310f2c93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:49:19, skipping insertion in model container [2019-11-07 02:49:19,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:49:14" (2/3) ... [2019-11-07 02:49:19,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@310f2c93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:49:19, skipping insertion in model container [2019-11-07 02:49:19,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:49:19" (3/3) ... [2019-11-07 02:49:19,038 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 [2019-11-07 02:49:19,054 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 02:49:19,071 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 02:49:19,091 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 02:49:19,150 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 02:49:19,150 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 02:49:19,150 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 02:49:19,151 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 02:49:19,151 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 02:49:19,151 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 02:49:19,151 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 02:49:19,152 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 02:49:19,197 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states. [2019-11-07 02:49:19,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-07 02:49:19,223 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 02:49:19,225 INFO L410 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] [2019-11-07 02:49:19,228 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 02:49:19,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 02:49:19,235 INFO L82 PathProgramCache]: Analyzing trace with hash -76993048, now seen corresponding path program 1 times [2019-11-07 02:49:19,245 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 02:49:19,246 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333498176] [2019-11-07 02:49:19,246 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 02:49:19,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 02:49:19,930 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-07 02:49:19,930 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333498176] [2019-11-07 02:49:19,931 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 02:49:19,931 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 02:49:19,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323678783] [2019-11-07 02:49:19,942 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 02:49:19,942 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 02:49:19,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 02:49:19,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 02:49:19,960 INFO L87 Difference]: Start difference. First operand 316 states. Second operand 3 states. [2019-11-07 02:49:20,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 02:49:20,423 INFO L93 Difference]: Finished difference Result 831 states and 1059 transitions. [2019-11-07 02:49:20,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 02:49:20,425 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 59 [2019-11-07 02:49:20,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 02:49:20,466 INFO L225 Difference]: With dead ends: 831 [2019-11-07 02:49:20,466 INFO L226 Difference]: Without dead ends: 527 [2019-11-07 02:49:20,478 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 02:49:20,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2019-11-07 02:49:20,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 527. [2019-11-07 02:49:20,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 527 states. [2019-11-07 02:49:20,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 657 transitions. [2019-11-07 02:49:20,610 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 657 transitions. Word has length 59 [2019-11-07 02:49:20,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 02:49:20,611 INFO L462 AbstractCegarLoop]: Abstraction has 527 states and 657 transitions. [2019-11-07 02:49:20,611 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 02:49:20,612 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 657 transitions. [2019-11-07 02:49:20,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-11-07 02:49:20,617 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 02:49:20,617 INFO L410 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] [2019-11-07 02:49:20,618 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 02:49:20,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 02:49:20,618 INFO L82 PathProgramCache]: Analyzing trace with hash -912083698, now seen corresponding path program 1 times [2019-11-07 02:49:20,618 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 02:49:20,619 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538951148] [2019-11-07 02:49:20,619 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 02:49:20,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 02:49:20,989 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 02:49:20,990 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538951148] [2019-11-07 02:49:20,990 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 02:49:20,990 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 02:49:20,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358069733] [2019-11-07 02:49:20,992 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 02:49:20,993 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 02:49:20,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 02:49:20,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-07 02:49:20,993 INFO L87 Difference]: Start difference. First operand 527 states and 657 transitions. Second operand 6 states. [2019-11-07 02:49:21,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 02:49:21,842 INFO L93 Difference]: Finished difference Result 1036 states and 1300 transitions. [2019-11-07 02:49:21,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 02:49:21,842 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2019-11-07 02:49:21,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 02:49:21,852 INFO L225 Difference]: With dead ends: 1036 [2019-11-07 02:49:21,853 INFO L226 Difference]: Without dead ends: 1015 [2019-11-07 02:49:21,854 INFO L630 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 [2019-11-07 02:49:21,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1015 states. [2019-11-07 02:49:21,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1015 to 1015. [2019-11-07 02:49:21,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1015 states. [2019-11-07 02:49:21,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 1277 transitions. [2019-11-07 02:49:21,931 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 1277 transitions. Word has length 73 [2019-11-07 02:49:21,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 02:49:21,933 INFO L462 AbstractCegarLoop]: Abstraction has 1015 states and 1277 transitions. [2019-11-07 02:49:21,941 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 02:49:21,942 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 1277 transitions. [2019-11-07 02:49:21,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-11-07 02:49:21,959 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 02:49:21,960 INFO L410 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] [2019-11-07 02:49:21,960 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 02:49:21,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 02:49:21,960 INFO L82 PathProgramCache]: Analyzing trace with hash -989621794, now seen corresponding path program 1 times [2019-11-07 02:49:21,961 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 02:49:21,961 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918681658] [2019-11-07 02:49:21,961 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 02:49:22,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 02:49:22,211 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-07 02:49:22,211 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918681658] [2019-11-07 02:49:22,211 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 02:49:22,211 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 02:49:22,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846520014] [2019-11-07 02:49:22,212 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 02:49:22,213 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 02:49:22,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 02:49:22,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 02:49:22,213 INFO L87 Difference]: Start difference. First operand 1015 states and 1277 transitions. Second operand 3 states. [2019-11-07 02:49:22,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 02:49:22,313 INFO L93 Difference]: Finished difference Result 2293 states and 2898 transitions. [2019-11-07 02:49:22,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 02:49:22,314 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2019-11-07 02:49:22,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 02:49:22,322 INFO L225 Difference]: With dead ends: 2293 [2019-11-07 02:49:22,322 INFO L226 Difference]: Without dead ends: 1300 [2019-11-07 02:49:22,325 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 02:49:22,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2019-11-07 02:49:22,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 1279. [2019-11-07 02:49:22,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1279 states. [2019-11-07 02:49:22,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1279 states to 1279 states and 1623 transitions. [2019-11-07 02:49:22,385 INFO L78 Accepts]: Start accepts. Automaton has 1279 states and 1623 transitions. Word has length 138 [2019-11-07 02:49:22,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 02:49:22,386 INFO L462 AbstractCegarLoop]: Abstraction has 1279 states and 1623 transitions. [2019-11-07 02:49:22,386 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 02:49:22,386 INFO L276 IsEmpty]: Start isEmpty. Operand 1279 states and 1623 transitions. [2019-11-07 02:49:22,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-11-07 02:49:22,391 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 02:49:22,391 INFO L410 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] [2019-11-07 02:49:22,391 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 02:49:22,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 02:49:22,392 INFO L82 PathProgramCache]: Analyzing trace with hash 892569057, now seen corresponding path program 1 times [2019-11-07 02:49:22,392 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 02:49:22,392 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940639521] [2019-11-07 02:49:22,392 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 02:49:22,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 02:49:22,604 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-11-07 02:49:22,605 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940639521] [2019-11-07 02:49:22,605 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 02:49:22,605 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 02:49:22,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550521296] [2019-11-07 02:49:22,606 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 02:49:22,607 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 02:49:22,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 02:49:22,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 02:49:22,607 INFO L87 Difference]: Start difference. First operand 1279 states and 1623 transitions. Second operand 3 states. [2019-11-07 02:49:23,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 02:49:23,373 INFO L93 Difference]: Finished difference Result 3417 states and 4330 transitions. [2019-11-07 02:49:23,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 02:49:23,373 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 170 [2019-11-07 02:49:23,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 02:49:23,385 INFO L225 Difference]: With dead ends: 3417 [2019-11-07 02:49:23,386 INFO L226 Difference]: Without dead ends: 2168 [2019-11-07 02:49:23,390 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 02:49:23,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2168 states. [2019-11-07 02:49:23,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2168 to 2147. [2019-11-07 02:49:23,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2147 states. [2019-11-07 02:49:23,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2147 states to 2147 states and 2693 transitions. [2019-11-07 02:49:23,480 INFO L78 Accepts]: Start accepts. Automaton has 2147 states and 2693 transitions. Word has length 170 [2019-11-07 02:49:23,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 02:49:23,481 INFO L462 AbstractCegarLoop]: Abstraction has 2147 states and 2693 transitions. [2019-11-07 02:49:23,481 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 02:49:23,481 INFO L276 IsEmpty]: Start isEmpty. Operand 2147 states and 2693 transitions. [2019-11-07 02:49:23,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-11-07 02:49:23,487 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 02:49:23,487 INFO L410 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] [2019-11-07 02:49:23,487 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 02:49:23,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 02:49:23,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1140267243, now seen corresponding path program 1 times [2019-11-07 02:49:23,488 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 02:49:23,488 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917911012] [2019-11-07 02:49:23,488 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 02:49:23,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 02:49:23,693 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2019-11-07 02:49:23,693 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917911012] [2019-11-07 02:49:23,693 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 02:49:23,693 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 02:49:23,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645102788] [2019-11-07 02:49:23,695 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 02:49:23,696 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 02:49:23,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 02:49:23,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 02:49:23,696 INFO L87 Difference]: Start difference. First operand 2147 states and 2693 transitions. Second operand 5 states. [2019-11-07 02:49:23,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 02:49:23,792 INFO L93 Difference]: Finished difference Result 4318 states and 5459 transitions. [2019-11-07 02:49:23,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-07 02:49:23,793 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 170 [2019-11-07 02:49:23,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 02:49:23,806 INFO L225 Difference]: With dead ends: 4318 [2019-11-07 02:49:23,806 INFO L226 Difference]: Without dead ends: 2201 [2019-11-07 02:49:23,814 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 02:49:23,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2201 states. [2019-11-07 02:49:23,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2201 to 2187. [2019-11-07 02:49:23,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2187 states. [2019-11-07 02:49:23,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 2741 transitions. [2019-11-07 02:49:23,916 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 2741 transitions. Word has length 170 [2019-11-07 02:49:23,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 02:49:23,916 INFO L462 AbstractCegarLoop]: Abstraction has 2187 states and 2741 transitions. [2019-11-07 02:49:23,916 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 02:49:23,917 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 2741 transitions. [2019-11-07 02:49:23,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-11-07 02:49:23,922 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 02:49:23,923 INFO L410 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] [2019-11-07 02:49:23,923 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 02:49:23,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 02:49:23,924 INFO L82 PathProgramCache]: Analyzing trace with hash -43516539, now seen corresponding path program 1 times [2019-11-07 02:49:23,924 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 02:49:23,924 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087762065] [2019-11-07 02:49:23,924 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 02:49:24,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 02:49:24,317 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-11-07 02:49:24,317 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087762065] [2019-11-07 02:49:24,317 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081777156] [2019-11-07 02:49:24,318 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 02:49:24,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 02:49:24,769 INFO L256 TraceCheckSpWp]: Trace formula consists of 1835 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 02:49:24,785 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 02:49:24,856 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-11-07 02:49:24,856 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 02:49:25,106 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-11-07 02:49:25,106 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 02:49:25,106 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2019-11-07 02:49:25,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940455323] [2019-11-07 02:49:25,107 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 02:49:25,107 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 02:49:25,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 02:49:25,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-11-07 02:49:25,108 INFO L87 Difference]: Start difference. First operand 2187 states and 2741 transitions. Second operand 4 states. [2019-11-07 02:49:25,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 02:49:25,208 INFO L93 Difference]: Finished difference Result 4352 states and 5459 transitions. [2019-11-07 02:49:25,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 02:49:25,208 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 174 [2019-11-07 02:49:25,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 02:49:25,230 INFO L225 Difference]: With dead ends: 4352 [2019-11-07 02:49:25,230 INFO L226 Difference]: Without dead ends: 2188 [2019-11-07 02:49:25,238 INFO L630 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 [2019-11-07 02:49:25,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2188 states. [2019-11-07 02:49:25,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2188 to 2188. [2019-11-07 02:49:25,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2188 states. [2019-11-07 02:49:25,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 2742 transitions. [2019-11-07 02:49:25,438 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 2742 transitions. Word has length 174 [2019-11-07 02:49:25,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 02:49:25,438 INFO L462 AbstractCegarLoop]: Abstraction has 2188 states and 2742 transitions. [2019-11-07 02:49:25,439 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 02:49:25,439 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 2742 transitions. [2019-11-07 02:49:25,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-11-07 02:49:25,445 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 02:49:25,446 INFO L410 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] [2019-11-07 02:49:25,652 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 02:49:25,653 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 02:49:25,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 02:49:25,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1783710495, now seen corresponding path program 1 times [2019-11-07 02:49:25,654 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 02:49:25,654 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136324540] [2019-11-07 02:49:25,654 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 02:49:25,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 02:49:25,945 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-11-07 02:49:25,946 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136324540] [2019-11-07 02:49:25,946 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455745097] [2019-11-07 02:49:25,946 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 02:49:26,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 02:49:26,365 INFO L256 TraceCheckSpWp]: Trace formula consists of 1847 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 02:49:26,380 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 02:49:26,440 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 38 proven. 1 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-11-07 02:49:26,440 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 02:49:26,690 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-11-07 02:49:26,690 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [504566772] [2019-11-07 02:49:26,718 INFO L159 IcfgInterpreter]: Started Sifa with 136 locations of interest [2019-11-07 02:49:26,719 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 02:49:26,736 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 02:49:26,744 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 02:49:26,745 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs