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--arcnet--rfc1201.ko-entry_point.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 02:20:50,838 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 02:20:50,840 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 02:20:50,853 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 02:20:50,854 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 02:20:50,855 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 02:20:50,856 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 02:20:50,858 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 02:20:50,860 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 02:20:50,861 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 02:20:50,862 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 02:20:50,863 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 02:20:50,863 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 02:20:50,864 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 02:20:50,865 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 02:20:50,866 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 02:20:50,867 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 02:20:50,868 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 02:20:50,870 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 02:20:50,871 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 02:20:50,873 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 02:20:50,874 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 02:20:50,875 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 02:20:50,876 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 02:20:50,878 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 02:20:50,879 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 02:20:50,879 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 02:20:50,880 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 02:20:50,880 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 02:20:50,881 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 02:20:50,882 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 02:20:50,882 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 02:20:50,883 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 02:20:50,884 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 02:20:50,885 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 02:20:50,885 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 02:20:50,886 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 02:20:50,886 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 02:20:50,886 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 02:20:50,887 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 02:20:50,888 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 02:20:50,889 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 02:20:50,903 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 02:20:50,904 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 02:20:50,905 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 02:20:50,905 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 02:20:50,905 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 02:20:50,906 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 02:20:50,906 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 02:20:50,906 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 02:20:50,906 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 02:20:50,906 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 02:20:50,907 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 02:20:50,907 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 02:20:50,907 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 02:20:50,907 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 02:20:50,907 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 02:20:50,908 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 02:20:50,908 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 02:20:50,908 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 02:20:50,908 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 02:20:50,909 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 02:20:50,909 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 02:20:50,909 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 02:20:50,909 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 02:20:50,910 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 02:20:50,910 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 02:20:50,910 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 02:20:50,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 02:20:50,910 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 02:20:50,911 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 [2019-10-15 02:20:51,268 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 02:20:51,281 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 02:20:51,285 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 02:20:51,287 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 02:20:51,287 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 02:20:51,288 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1201.ko-entry_point.cil.out.i [2019-10-15 02:20:51,352 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f6b2d861/6bbff891759e44e69b3c819a7b4c33a0/FLAG40501d75c [2019-10-15 02:20:52,146 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 02:20:52,147 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1201.ko-entry_point.cil.out.i [2019-10-15 02:20:52,186 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f6b2d861/6bbff891759e44e69b3c819a7b4c33a0/FLAG40501d75c [2019-10-15 02:20:52,220 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f6b2d861/6bbff891759e44e69b3c819a7b4c33a0 [2019-10-15 02:20:52,231 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 02:20:52,232 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 02:20:52,235 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 02:20:52,236 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 02:20:52,239 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 02:20:52,240 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 02:20:52" (1/1) ... [2019-10-15 02:20:52,243 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56206268 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:20:52, skipping insertion in model container [2019-10-15 02:20:52,244 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 02:20:52" (1/1) ... [2019-10-15 02:20:52,252 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 02:20:52,362 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 02:20:53,689 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 02:20:53,721 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 02:20:54,079 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 02:20:54,178 INFO L192 MainTranslator]: Completed translation [2019-10-15 02:20:54,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:20:54 WrapperNode [2019-10-15 02:20:54,180 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 02:20:54,181 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 02:20:54,181 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 02:20:54,182 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 02:20:54,206 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:20:54" (1/1) ... [2019-10-15 02:20:54,207 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:20:54" (1/1) ... [2019-10-15 02:20:54,304 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:20:54" (1/1) ... [2019-10-15 02:20:54,304 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:20:54" (1/1) ... [2019-10-15 02:20:54,470 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:20:54" (1/1) ... [2019-10-15 02:20:54,481 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:20:54" (1/1) ... [2019-10-15 02:20:54,491 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:20:54" (1/1) ... [2019-10-15 02:20:54,506 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 02:20:54,508 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 02:20:54,508 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 02:20:54,509 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 02:20:54,510 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:20:54" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 02:20:54,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 02:20:54,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 02:20:54,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~int~X~$Pointer$~X~int~TO~VOID [2019-10-15 02:20:54,586 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab16 [2019-10-15 02:20:54,586 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reset_mac_header [2019-10-15 02:20:54,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2019-10-15 02:20:54,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2019-10-15 02:20:54,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2019-10-15 02:20:54,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_ptr [2019-10-15 02:20:54,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_ulong [2019-10-15 02:20:54,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2019-10-15 02:20:54,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2019-10-15 02:20:54,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2019-10-15 02:20:54,590 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_trap [2019-10-15 02:20:54,590 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2019-10-15 02:20:54,590 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_irq [2019-10-15 02:20:54,592 INFO L138 BoogieDeclarations]: Found implementation of procedure arcnet_rfc1201_init [2019-10-15 02:20:54,593 INFO L138 BoogieDeclarations]: Found implementation of procedure arcnet_rfc1201_exit [2019-10-15 02:20:54,593 INFO L138 BoogieDeclarations]: Found implementation of procedure type_trans [2019-10-15 02:20:54,593 INFO L138 BoogieDeclarations]: Found implementation of procedure rx [2019-10-15 02:20:54,593 INFO L138 BoogieDeclarations]: Found implementation of procedure build_header [2019-10-15 02:20:54,594 INFO L138 BoogieDeclarations]: Found implementation of procedure load_pkt [2019-10-15 02:20:54,594 INFO L138 BoogieDeclarations]: Found implementation of procedure prepare_tx [2019-10-15 02:20:54,595 INFO L138 BoogieDeclarations]: Found implementation of procedure continue_tx [2019-10-15 02:20:54,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize_ArcProto_1 [2019-10-15 02:20:54,595 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 02:20:54,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_consume_skb_5 [2019-10-15 02:20:54,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kfree_skb_6 [2019-10-15 02:20:54,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kfree_skb_7 [2019-10-15 02:20:54,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kfree_skb_8 [2019-10-15 02:20:54,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_kfree_skb_11 [2019-10-15 02:20:54,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc_skb_12 [2019-10-15 02:20:54,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_netif_rx_13 [2019-10-15 02:20:54,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_netif_rx_15 [2019-10-15 02:20:54,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_init [2019-10-15 02:20:54,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_add [2019-10-15 02:20:54,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_remove [2019-10-15 02:20:54,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_contains [2019-10-15 02:20:54,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_is_empty [2019-10-15 02:20:54,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2019-10-15 02:20:54,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_err_ptr [2019-10-15 02:20:54,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_ptr_err [2019-10-15 02:20:54,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err_or_null [2019-10-15 02:20:54,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2019-10-15 02:20:54,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize [2019-10-15 02:20:54,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free [2019-10-15 02:20:54,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free_int [2019-10-15 02:20:54,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_alloc_skb [2019-10-15 02:20:54,600 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_netdev_alloc_skb [2019-10-15 02:20:54,600 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_current [2019-10-15 02:20:54,600 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2019-10-15 02:20:54,600 INFO L138 BoogieDeclarations]: Found implementation of procedure __dev_kfree_skb_irq [2019-10-15 02:20:54,601 INFO L138 BoogieDeclarations]: Found implementation of procedure arcnet_unregister_proto [2019-10-15 02:20:54,601 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2019-10-15 02:20:54,601 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_pull [2019-10-15 02:20:54,601 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_push [2019-10-15 02:20:54,601 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2019-10-15 02:20:54,601 INFO L138 BoogieDeclarations]: Found implementation of procedure external_alloc [2019-10-15 02:20:54,602 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2019-10-15 02:20:54,602 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2019-10-15 02:20:54,602 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2019-10-15 02:20:54,602 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2019-10-15 02:20:54,603 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 02:20:54,603 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2019-10-15 02:20:54,603 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab16 [2019-10-15 02:20:54,603 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2019-10-15 02:20:54,603 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2019-10-15 02:20:54,603 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2019-10-15 02:20:54,603 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kfree_skb_6 [2019-10-15 02:20:54,604 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kfree_skb_7 [2019-10-15 02:20:54,604 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kfree_skb_8 [2019-10-15 02:20:54,604 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_kfree_skb_11 [2019-10-15 02:20:54,604 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_consume_skb_5 [2019-10-15 02:20:54,605 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc_skb_12 [2019-10-15 02:20:54,605 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2019-10-15 02:20:54,605 INFO L130 BoogieDeclarations]: Found specification of procedure skb_push [2019-10-15 02:20:54,605 INFO L130 BoogieDeclarations]: Found specification of procedure skb_pull [2019-10-15 02:20:54,605 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reset_mac_header [2019-10-15 02:20:54,605 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-15 02:20:54,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 02:20:54,606 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2019-10-15 02:20:54,606 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free [2019-10-15 02:20:54,606 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free_int [2019-10-15 02:20:54,606 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-15 02:20:54,606 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-10-15 02:20:54,606 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 02:20:54,606 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ushort [2019-10-15 02:20:54,607 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2019-10-15 02:20:54,607 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_pointer [2019-10-15 02:20:54,607 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-15 02:20:54,607 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2019-10-15 02:20:54,607 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-15 02:20:54,607 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2019-10-15 02:20:54,608 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2019-10-15 02:20:54,608 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2019-10-15 02:20:54,608 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_ptr [2019-10-15 02:20:54,608 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_ulong [2019-10-15 02:20:54,608 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2019-10-15 02:20:54,608 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2019-10-15 02:20:54,608 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_trap [2019-10-15 02:20:54,608 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize_ArcProto_1 [2019-10-15 02:20:54,609 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2019-10-15 02:20:54,609 INFO L130 BoogieDeclarations]: Found specification of procedure __dev_kfree_skb_irq [2019-10-15 02:20:54,609 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_irq [2019-10-15 02:20:54,609 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_netif_rx_13 [2019-10-15 02:20:54,609 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_netif_rx_15 [2019-10-15 02:20:54,609 INFO L130 BoogieDeclarations]: Found specification of procedure arcnet_unregister_proto [2019-10-15 02:20:54,609 INFO L130 BoogieDeclarations]: Found specification of procedure type_trans [2019-10-15 02:20:54,610 INFO L130 BoogieDeclarations]: Found specification of procedure rx [2019-10-15 02:20:54,610 INFO L130 BoogieDeclarations]: Found specification of procedure build_header [2019-10-15 02:20:54,610 INFO L130 BoogieDeclarations]: Found specification of procedure prepare_tx [2019-10-15 02:20:54,610 INFO L130 BoogieDeclarations]: Found specification of procedure continue_tx [2019-10-15 02:20:54,610 INFO L130 BoogieDeclarations]: Found specification of procedure arcnet_rfc1201_init [2019-10-15 02:20:54,610 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 02:20:54,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-15 02:20:54,611 INFO L130 BoogieDeclarations]: Found specification of procedure arcnet_rfc1201_exit [2019-10-15 02:20:54,611 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 02:20:54,611 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~int~X~$Pointer$~X~int~TO~VOID [2019-10-15 02:20:54,611 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2019-10-15 02:20:54,611 INFO L130 BoogieDeclarations]: Found specification of procedure load_pkt [2019-10-15 02:20:54,611 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 02:20:54,612 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize [2019-10-15 02:20:54,612 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2019-10-15 02:20:54,612 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 02:20:54,612 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2019-10-15 02:20:54,612 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_init [2019-10-15 02:20:54,612 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_add [2019-10-15 02:20:54,612 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_remove [2019-10-15 02:20:54,613 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_contains [2019-10-15 02:20:54,613 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_is_empty [2019-10-15 02:20:54,613 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2019-10-15 02:20:54,613 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_err_ptr [2019-10-15 02:20:54,613 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_ptr_err [2019-10-15 02:20:54,613 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err_or_null [2019-10-15 02:20:54,614 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_netdev_alloc_skb [2019-10-15 02:20:54,614 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_alloc_skb [2019-10-15 02:20:54,614 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_current [2019-10-15 02:20:54,614 INFO L130 BoogieDeclarations]: Found specification of procedure external_alloc [2019-10-15 02:20:54,614 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-15 02:20:54,614 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2019-10-15 02:20:54,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 02:20:54,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-15 02:20:54,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-10-15 02:20:54,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 02:20:54,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2019-10-15 02:20:54,615 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2019-10-15 02:20:54,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2019-10-15 02:20:54,616 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2019-10-15 02:20:55,473 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2019-10-15 02:21:26,061 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 02:21:26,061 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-15 02:21:26,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 02:21:26 BoogieIcfgContainer [2019-10-15 02:21:26,063 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 02:21:26,065 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 02:21:26,065 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 02:21:26,068 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 02:21:26,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 02:20:52" (1/3) ... [2019-10-15 02:21:26,069 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31553756 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 02:21:26, skipping insertion in model container [2019-10-15 02:21:26,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:20:54" (2/3) ... [2019-10-15 02:21:26,069 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31553756 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 02:21:26, skipping insertion in model container [2019-10-15 02:21:26,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 02:21:26" (3/3) ... [2019-10-15 02:21:26,071 INFO L109 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1201.ko-entry_point.cil.out.i [2019-10-15 02:21:26,081 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 02:21:26,091 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 02:21:26,103 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 02:21:26,132 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 02:21:26,132 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 02:21:26,132 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 02:21:26,132 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 02:21:26,132 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 02:21:26,133 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 02:21:26,133 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 02:21:26,133 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 02:21:26,159 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states. [2019-10-15 02:21:26,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-15 02:21:26,170 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:21:26,172 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 02:21:26,174 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:21:26,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:21:26,181 INFO L82 PathProgramCache]: Analyzing trace with hash -339648814, now seen corresponding path program 1 times [2019-10-15 02:21:26,190 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:21:26,191 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039263745] [2019-10-15 02:21:26,191 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:21:26,191 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:21:26,192 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:21:26,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:21:26,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 02:21:26,751 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039263745] [2019-10-15 02:21:26,751 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 02:21:26,752 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 02:21:26,752 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441713351] [2019-10-15 02:21:26,757 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 02:21:26,757 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 02:21:26,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 02:21:26,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 02:21:26,775 INFO L87 Difference]: Start difference. First operand 306 states. Second operand 3 states. [2019-10-15 02:21:27,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 02:21:27,031 INFO L93 Difference]: Finished difference Result 791 states and 1070 transitions. [2019-10-15 02:21:27,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 02:21:27,033 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 44 [2019-10-15 02:21:27,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 02:21:27,053 INFO L225 Difference]: With dead ends: 791 [2019-10-15 02:21:27,053 INFO L226 Difference]: Without dead ends: 507 [2019-10-15 02:21:27,060 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 02:21:27,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2019-10-15 02:21:27,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 507. [2019-10-15 02:21:27,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 507 states. [2019-10-15 02:21:27,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 662 transitions. [2019-10-15 02:21:27,185 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 662 transitions. Word has length 44 [2019-10-15 02:21:27,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 02:21:27,185 INFO L462 AbstractCegarLoop]: Abstraction has 507 states and 662 transitions. [2019-10-15 02:21:27,185 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 02:21:27,186 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 662 transitions. [2019-10-15 02:21:27,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-15 02:21:27,199 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:21:27,199 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 02:21:27,199 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:21:27,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:21:27,200 INFO L82 PathProgramCache]: Analyzing trace with hash 866175995, now seen corresponding path program 1 times [2019-10-15 02:21:27,200 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:21:27,200 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595722012] [2019-10-15 02:21:27,200 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:21:27,201 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:21:27,201 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:21:27,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:21:27,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 02:21:27,427 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595722012] [2019-10-15 02:21:27,502 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 02:21:27,502 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 02:21:27,505 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164937580] [2019-10-15 02:21:27,507 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 02:21:27,508 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 02:21:27,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 02:21:27,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 02:21:27,512 INFO L87 Difference]: Start difference. First operand 507 states and 662 transitions. Second operand 5 states. [2019-10-15 02:21:27,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 02:21:27,631 INFO L93 Difference]: Finished difference Result 995 states and 1302 transitions. [2019-10-15 02:21:27,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 02:21:27,634 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2019-10-15 02:21:27,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 02:21:27,643 INFO L225 Difference]: With dead ends: 995 [2019-10-15 02:21:27,643 INFO L226 Difference]: Without dead ends: 506 [2019-10-15 02:21:27,651 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-15 02:21:27,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2019-10-15 02:21:27,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 506. [2019-10-15 02:21:27,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 506 states. [2019-10-15 02:21:27,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 658 transitions. [2019-10-15 02:21:27,705 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 658 transitions. Word has length 44 [2019-10-15 02:21:27,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 02:21:27,706 INFO L462 AbstractCegarLoop]: Abstraction has 506 states and 658 transitions. [2019-10-15 02:21:27,706 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 02:21:27,706 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 658 transitions. [2019-10-15 02:21:27,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-10-15 02:21:27,710 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:21:27,711 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2019-10-15 02:21:27,711 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:21:27,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:21:27,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1598167988, now seen corresponding path program 1 times [2019-10-15 02:21:27,712 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:21:27,712 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464258156] [2019-10-15 02:21:27,712 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:21:27,713 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:21:27,713 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:21:27,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:21:27,940 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-15 02:21:27,941 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464258156] [2019-10-15 02:21:27,941 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 02:21:27,941 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 02:21:27,941 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294264269] [2019-10-15 02:21:27,942 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 02:21:27,942 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 02:21:27,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 02:21:27,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-15 02:21:27,943 INFO L87 Difference]: Start difference. First operand 506 states and 658 transitions. Second operand 6 states. [2019-10-15 02:21:28,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 02:21:28,537 INFO L93 Difference]: Finished difference Result 1002 states and 1320 transitions. [2019-10-15 02:21:28,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 02:21:28,538 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2019-10-15 02:21:28,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 02:21:28,549 INFO L225 Difference]: With dead ends: 1002 [2019-10-15 02:21:28,550 INFO L226 Difference]: Without dead ends: 985 [2019-10-15 02:21:28,551 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 [2019-10-15 02:21:28,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2019-10-15 02:21:28,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 985. [2019-10-15 02:21:28,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 985 states. [2019-10-15 02:21:28,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1303 transitions. [2019-10-15 02:21:28,619 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1303 transitions. Word has length 72 [2019-10-15 02:21:28,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 02:21:28,619 INFO L462 AbstractCegarLoop]: Abstraction has 985 states and 1303 transitions. [2019-10-15 02:21:28,619 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 02:21:28,620 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1303 transitions. [2019-10-15 02:21:28,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-10-15 02:21:28,626 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:21:28,626 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 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] [2019-10-15 02:21:28,626 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:21:28,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:21:28,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1579573307, now seen corresponding path program 1 times [2019-10-15 02:21:28,627 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:21:28,627 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59597061] [2019-10-15 02:21:28,628 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:21:28,628 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:21:28,628 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:21:28,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:21:28,835 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-15 02:21:28,836 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59597061] [2019-10-15 02:21:28,836 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 02:21:28,836 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 02:21:28,837 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422579813] [2019-10-15 02:21:28,837 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 02:21:28,837 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 02:21:28,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 02:21:28,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 02:21:28,838 INFO L87 Difference]: Start difference. First operand 985 states and 1303 transitions. Second operand 5 states. [2019-10-15 02:21:28,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 02:21:28,898 INFO L93 Difference]: Finished difference Result 1976 states and 2643 transitions. [2019-10-15 02:21:28,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 02:21:28,898 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 119 [2019-10-15 02:21:28,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 02:21:28,906 INFO L225 Difference]: With dead ends: 1976 [2019-10-15 02:21:28,906 INFO L226 Difference]: Without dead ends: 1009 [2019-10-15 02:21:28,910 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 02:21:28,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2019-10-15 02:21:28,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 1005. [2019-10-15 02:21:28,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1005 states. [2019-10-15 02:21:28,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 1328 transitions. [2019-10-15 02:21:28,964 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 1328 transitions. Word has length 119 [2019-10-15 02:21:28,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 02:21:28,965 INFO L462 AbstractCegarLoop]: Abstraction has 1005 states and 1328 transitions. [2019-10-15 02:21:28,965 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 02:21:28,965 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 1328 transitions. [2019-10-15 02:21:28,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-15 02:21:28,971 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:21:28,972 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 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] [2019-10-15 02:21:28,972 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:21:28,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:21:28,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1770335988, now seen corresponding path program 1 times [2019-10-15 02:21:28,973 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:21:28,973 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89694609] [2019-10-15 02:21:28,973 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:21:28,973 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:21:28,974 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:21:29,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:21:29,241 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-15 02:21:29,241 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89694609] [2019-10-15 02:21:29,241 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 02:21:29,242 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 02:21:29,242 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363188991] [2019-10-15 02:21:29,242 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 02:21:29,243 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 02:21:29,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 02:21:29,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 02:21:29,243 INFO L87 Difference]: Start difference. First operand 1005 states and 1328 transitions. Second operand 4 states. [2019-10-15 02:21:29,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 02:21:29,308 INFO L93 Difference]: Finished difference Result 1995 states and 2639 transitions. [2019-10-15 02:21:29,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 02:21:29,309 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 123 [2019-10-15 02:21:29,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 02:21:29,316 INFO L225 Difference]: With dead ends: 1995 [2019-10-15 02:21:29,317 INFO L226 Difference]: Without dead ends: 1006 [2019-10-15 02:21:29,322 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-15 02:21:29,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2019-10-15 02:21:29,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 1006. [2019-10-15 02:21:29,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1006 states. [2019-10-15 02:21:29,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 1329 transitions. [2019-10-15 02:21:29,376 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 1329 transitions. Word has length 123 [2019-10-15 02:21:29,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 02:21:29,376 INFO L462 AbstractCegarLoop]: Abstraction has 1006 states and 1329 transitions. [2019-10-15 02:21:29,377 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 02:21:29,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 1329 transitions. [2019-10-15 02:21:29,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-15 02:21:29,384 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:21:29,384 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 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] [2019-10-15 02:21:29,384 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:21:29,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:21:29,385 INFO L82 PathProgramCache]: Analyzing trace with hash 328289628, now seen corresponding path program 1 times [2019-10-15 02:21:29,385 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:21:29,386 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986158340] [2019-10-15 02:21:29,386 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:21:29,386 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:21:29,386 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:21:29,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:21:29,929 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 02:21:29,930 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986158340] [2019-10-15 02:21:29,930 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 02:21:29,930 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-10-15 02:21:29,931 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070270264] [2019-10-15 02:21:29,931 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-15 02:21:29,931 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 02:21:29,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-15 02:21:29,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-10-15 02:21:29,932 INFO L87 Difference]: Start difference. First operand 1006 states and 1329 transitions. Second operand 10 states.