/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 --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--net--arcnet--com90xx.ko-entry_point.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 15:27:17,668 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 15:27:17,671 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 15:27:17,710 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 15:27:17,710 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 15:27:17,718 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 15:27:17,720 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 15:27:17,723 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 15:27:17,726 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 15:27:17,728 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 15:27:17,729 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 15:27:17,730 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 15:27:17,730 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 15:27:17,732 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 15:27:17,734 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 15:27:17,736 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 15:27:17,737 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 15:27:17,738 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 15:27:17,739 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 15:27:17,749 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 15:27:17,751 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 15:27:17,751 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 15:27:17,752 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 15:27:17,753 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 15:27:17,763 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 15:27:17,763 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 15:27:17,763 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 15:27:17,764 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 15:27:17,764 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 15:27:17,769 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 15:27:17,769 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 15:27:17,770 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 15:27:17,771 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 15:27:17,771 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 15:27:17,772 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 15:27:17,772 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 15:27:17,773 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 15:27:17,773 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 15:27:17,773 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 15:27:17,774 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 15:27:17,777 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 15:27:17,778 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2020-08-21 15:27:17,816 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 15:27:17,817 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 15:27:17,819 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 15:27:17,819 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 15:27:17,819 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 15:27:17,819 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 15:27:17,820 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 15:27:17,820 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 15:27:17,820 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 15:27:17,820 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 15:27:17,821 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 15:27:17,821 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 15:27:17,822 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 15:27:17,822 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 15:27:17,822 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 15:27:17,822 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 15:27:17,823 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 15:27:17,823 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 15:27:17,823 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 15:27:17,823 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 15:27:17,823 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 15:27:17,824 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 15:27:17,824 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 15:27:17,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 15:27:17,824 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 15:27:17,824 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 15:27:17,824 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-21 15:27:17,825 INFO L138 SettingsManager]: * To the following directory=dump/ Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> interpolation-heuristic=FIRST;log-additional-information=true; [2020-08-21 15:27:18,142 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 15:27:18,158 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 15:27:18,163 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 15:27:18,164 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 15:27:18,165 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 15:27:18,165 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--net--arcnet--com90xx.ko-entry_point.cil.out.i [2020-08-21 15:27:18,234 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e9751cc26/b5da347fbc9c4b61a1b5f4f668ab1d06/FLAG5924762a8 [2020-08-21 15:27:19,009 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 15:27:19,010 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--net--arcnet--com90xx.ko-entry_point.cil.out.i [2020-08-21 15:27:19,050 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e9751cc26/b5da347fbc9c4b61a1b5f4f668ab1d06/FLAG5924762a8 [2020-08-21 15:27:19,096 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e9751cc26/b5da347fbc9c4b61a1b5f4f668ab1d06 [2020-08-21 15:27:19,105 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 15:27:19,106 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 15:27:19,108 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 15:27:19,108 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 15:27:19,112 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 15:27:19,113 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 03:27:19" (1/1) ... [2020-08-21 15:27:19,116 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6340f19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:27:19, skipping insertion in model container [2020-08-21 15:27:19,116 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 03:27:19" (1/1) ... [2020-08-21 15:27:19,124 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 15:27:19,248 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 15:27:20,586 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 15:27:20,604 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 15:27:20,792 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 15:27:20,850 INFO L208 MainTranslator]: Completed translation [2020-08-21 15:27:20,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:27:20 WrapperNode [2020-08-21 15:27:20,851 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 15:27:20,852 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 15:27:20,852 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 15:27:20,852 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 15:27:20,866 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:27:20" (1/1) ... [2020-08-21 15:27:20,866 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:27:20" (1/1) ... [2020-08-21 15:27:20,914 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:27:20" (1/1) ... [2020-08-21 15:27:20,915 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:27:20" (1/1) ... [2020-08-21 15:27:21,013 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:27:20" (1/1) ... [2020-08-21 15:27:21,038 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:27:20" (1/1) ... [2020-08-21 15:27:21,070 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:27:20" (1/1) ... [2020-08-21 15:27:21,086 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 15:27:21,087 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 15:27:21,087 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 15:27:21,087 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 15:27:21,088 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:27:20" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-21 15:27:21,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 15:27:21,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 15:27:21,162 INFO L138 BoogieDeclarations]: Found implementation of procedure readb [2020-08-21 15:27:21,162 INFO L138 BoogieDeclarations]: Found implementation of procedure writeb [2020-08-21 15:27:21,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ioremap [2020-08-21 15:27:21,163 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_fromio [2020-08-21 15:27:21,163 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_toio [2020-08-21 15:27:21,163 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2020-08-21 15:27:21,164 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2020-08-21 15:27:21,164 INFO L138 BoogieDeclarations]: Found implementation of procedure __kmalloc [2020-08-21 15:27:21,164 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2020-08-21 15:27:21,164 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2020-08-21 15:27:21,165 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-21 15:27:21,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2020-08-21 15:27:21,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2020-08-21 15:27:21,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2020-08-21 15:27:21,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2020-08-21 15:27:21,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2020-08-21 15:27:21,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_ulong [2020-08-21 15:27:21,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2020-08-21 15:27:21,166 INFO L138 BoogieDeclarations]: Found implementation of procedure request_irq [2020-08-21 15:27:21,167 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2020-08-21 15:27:21,167 INFO L138 BoogieDeclarations]: Found implementation of procedure com90xx_probe [2020-08-21 15:27:21,167 INFO L138 BoogieDeclarations]: Found implementation of procedure check_mirror [2020-08-21 15:27:21,167 INFO L138 BoogieDeclarations]: Found implementation of procedure com90xx_found [2020-08-21 15:27:21,167 INFO L138 BoogieDeclarations]: Found implementation of procedure com90xx_command [2020-08-21 15:27:21,168 INFO L138 BoogieDeclarations]: Found implementation of procedure com90xx_status [2020-08-21 15:27:21,168 INFO L138 BoogieDeclarations]: Found implementation of procedure com90xx_setmask [2020-08-21 15:27:21,168 INFO L138 BoogieDeclarations]: Found implementation of procedure com90xx_reset [2020-08-21 15:27:21,168 INFO L138 BoogieDeclarations]: Found implementation of procedure com90xx_copy_to_card [2020-08-21 15:27:21,168 INFO L138 BoogieDeclarations]: Found implementation of procedure com90xx_copy_from_card [2020-08-21 15:27:21,168 INFO L138 BoogieDeclarations]: Found implementation of procedure com90xx_init [2020-08-21 15:27:21,169 INFO L138 BoogieDeclarations]: Found implementation of procedure com90xx_exit [2020-08-21 15:27:21,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_1 [2020-08-21 15:27:21,169 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_suitable_irq_1 [2020-08-21 15:27:21,169 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_check_1 [2020-08-21 15:27:21,169 INFO L138 BoogieDeclarations]: Found implementation of procedure choose_interrupt_1 [2020-08-21 15:27:21,169 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_irq_1 [2020-08-21 15:27:21,170 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 15:27:21,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_request_irq_5 [2020-08-21 15:27:21,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_irq_6 [2020-08-21 15:27:21,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_irq_7 [2020-08-21 15:27:21,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2020-08-21 15:27:21,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2020-08-21 15:27:21,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_err_ptr [2020-08-21 15:27:21,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_ptr_err [2020-08-21 15:27:21,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err_or_null [2020-08-21 15:27:21,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_get [2020-08-21 15:27:21,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_try_module_get [2020-08-21 15:27:21,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put [2020-08-21 15:27:21,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put_and_exit [2020-08-21 15:27:21,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_refcount [2020-08-21 15:27:21,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2020-08-21 15:27:21,172 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2020-08-21 15:27:21,172 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2020-08-21 15:27:21,173 INFO L138 BoogieDeclarations]: Found implementation of procedure __request_region [2020-08-21 15:27:21,173 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_arcdev [2020-08-21 15:27:21,173 INFO L138 BoogieDeclarations]: Found implementation of procedure arcnet_interrupt [2020-08-21 15:27:21,173 INFO L138 BoogieDeclarations]: Found implementation of procedure free_irq [2020-08-21 15:27:21,173 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2020-08-21 15:27:21,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ioremap_nocache [2020-08-21 15:27:21,174 INFO L138 BoogieDeclarations]: Found implementation of procedure iounmap [2020-08-21 15:27:21,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize [2020-08-21 15:27:21,174 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2020-08-21 15:27:21,174 INFO L138 BoogieDeclarations]: Found implementation of procedure probe_irq_off [2020-08-21 15:27:21,174 INFO L138 BoogieDeclarations]: Found implementation of procedure probe_irq_on [2020-08-21 15:27:21,175 INFO L138 BoogieDeclarations]: Found implementation of procedure register_netdev [2020-08-21 15:27:21,175 INFO L138 BoogieDeclarations]: Found implementation of procedure request_threaded_irq [2020-08-21 15:27:21,175 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_netdev [2020-08-21 15:27:21,175 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2020-08-21 15:27:21,175 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2020-08-21 15:27:21,176 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-08-21 15:27:21,176 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2020-08-21 15:27:21,176 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 15:27:21,176 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2020-08-21 15:27:21,176 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2020-08-21 15:27:21,176 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2020-08-21 15:27:21,177 INFO L130 BoogieDeclarations]: Found specification of procedure __request_region [2020-08-21 15:27:21,177 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2020-08-21 15:27:21,177 INFO L130 BoogieDeclarations]: Found specification of procedure readb [2020-08-21 15:27:21,177 INFO L130 BoogieDeclarations]: Found specification of procedure writeb [2020-08-21 15:27:21,177 INFO L130 BoogieDeclarations]: Found specification of procedure ioremap_nocache [2020-08-21 15:27:21,178 INFO L130 BoogieDeclarations]: Found specification of procedure ioremap [2020-08-21 15:27:21,178 INFO L130 BoogieDeclarations]: Found specification of procedure iounmap [2020-08-21 15:27:21,178 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_fromio [2020-08-21 15:27:21,178 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2020-08-21 15:27:21,178 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_toio [2020-08-21 15:27:21,178 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2020-08-21 15:27:21,179 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2020-08-21 15:27:21,179 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2020-08-21 15:27:21,179 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2020-08-21 15:27:21,179 INFO L130 BoogieDeclarations]: Found specification of procedure __kmalloc [2020-08-21 15:27:21,179 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2020-08-21 15:27:21,179 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2020-08-21 15:27:21,180 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2020-08-21 15:27:21,180 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 15:27:21,180 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-21 15:27:21,180 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 15:27:21,181 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2020-08-21 15:27:21,181 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 15:27:21,181 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-21 15:27:21,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 15:27:21,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-08-21 15:27:21,182 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2020-08-21 15:27:21,182 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2020-08-21 15:27:21,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2020-08-21 15:27:21,182 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2020-08-21 15:27:21,183 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_ulong [2020-08-21 15:27:21,183 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2020-08-21 15:27:21,183 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_1 [2020-08-21 15:27:21,183 INFO L130 BoogieDeclarations]: Found specification of procedure activate_suitable_irq_1 [2020-08-21 15:27:21,183 INFO L130 BoogieDeclarations]: Found specification of procedure reg_check_1 [2020-08-21 15:27:21,184 INFO L130 BoogieDeclarations]: Found specification of procedure choose_interrupt_1 [2020-08-21 15:27:21,184 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_irq_1 [2020-08-21 15:27:21,184 INFO L130 BoogieDeclarations]: Found specification of procedure request_threaded_irq [2020-08-21 15:27:21,184 INFO L130 BoogieDeclarations]: Found specification of procedure request_irq [2020-08-21 15:27:21,184 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_request_irq_5 [2020-08-21 15:27:21,184 INFO L130 BoogieDeclarations]: Found specification of procedure free_irq [2020-08-21 15:27:21,185 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_irq_6 [2020-08-21 15:27:21,185 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_irq_7 [2020-08-21 15:27:21,185 INFO L130 BoogieDeclarations]: Found specification of procedure probe_irq_on [2020-08-21 15:27:21,185 INFO L130 BoogieDeclarations]: Found specification of procedure probe_irq_off [2020-08-21 15:27:21,185 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2020-08-21 15:27:21,186 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2020-08-21 15:27:21,186 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2020-08-21 15:27:21,186 INFO L130 BoogieDeclarations]: Found specification of procedure register_netdev [2020-08-21 15:27:21,186 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_netdev [2020-08-21 15:27:21,186 INFO L130 BoogieDeclarations]: Found specification of procedure arcnet_interrupt [2020-08-21 15:27:21,186 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_arcdev [2020-08-21 15:27:21,187 INFO L130 BoogieDeclarations]: Found specification of procedure com90xx_found [2020-08-21 15:27:21,187 INFO L130 BoogieDeclarations]: Found specification of procedure com90xx_command [2020-08-21 15:27:21,187 INFO L130 BoogieDeclarations]: Found specification of procedure com90xx_status [2020-08-21 15:27:21,187 INFO L130 BoogieDeclarations]: Found specification of procedure com90xx_setmask [2020-08-21 15:27:21,187 INFO L130 BoogieDeclarations]: Found specification of procedure com90xx_reset [2020-08-21 15:27:21,187 INFO L130 BoogieDeclarations]: Found specification of procedure com90xx_copy_to_card [2020-08-21 15:27:21,188 INFO L130 BoogieDeclarations]: Found specification of procedure com90xx_copy_from_card [2020-08-21 15:27:21,188 INFO L130 BoogieDeclarations]: Found specification of procedure com90xx_probe [2020-08-21 15:27:21,188 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 15:27:21,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 15:27:21,188 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 15:27:21,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 15:27:21,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 15:27:21,189 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 15:27:21,189 INFO L130 BoogieDeclarations]: Found specification of procedure check_mirror [2020-08-21 15:27:21,189 INFO L130 BoogieDeclarations]: Found specification of procedure com90xx_init [2020-08-21 15:27:21,189 INFO L130 BoogieDeclarations]: Found specification of procedure com90xx_exit [2020-08-21 15:27:21,190 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize [2020-08-21 15:27:21,190 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2020-08-21 15:27:21,190 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 15:27:21,190 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2020-08-21 15:27:21,190 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2020-08-21 15:27:21,190 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_err_ptr [2020-08-21 15:27:21,191 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_ptr_err [2020-08-21 15:27:21,191 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err_or_null [2020-08-21 15:27:21,191 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_get [2020-08-21 15:27:21,191 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_try_module_get [2020-08-21 15:27:21,191 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put [2020-08-21 15:27:21,191 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put_and_exit [2020-08-21 15:27:21,192 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_refcount [2020-08-21 15:27:21,192 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 15:27:21,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 15:27:21,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-21 15:27:21,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 15:27:21,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2020-08-21 15:27:21,193 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2020-08-21 15:27:21,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2020-08-21 15:27:21,193 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2020-08-21 15:27:21,980 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2020-08-21 15:27:21,985 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_module_put_and_exitFINAL: assume true; [2020-08-21 15:27:24,824 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 15:27:24,825 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 15:27:24,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 03:27:24 BoogieIcfgContainer [2020-08-21 15:27:24,837 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 15:27:24,838 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 15:27:24,838 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 15:27:24,841 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 15:27:24,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 03:27:19" (1/3) ... [2020-08-21 15:27:24,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dc53f9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 03:27:24, skipping insertion in model container [2020-08-21 15:27:24,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:27:20" (2/3) ... [2020-08-21 15:27:24,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dc53f9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 03:27:24, skipping insertion in model container [2020-08-21 15:27:24,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 03:27:24" (3/3) ... [2020-08-21 15:27:24,845 INFO L109 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--net--arcnet--com90xx.ko-entry_point.cil.out.i [2020-08-21 15:27:24,855 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 15:27:24,863 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 15:27:24,877 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 15:27:24,905 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 15:27:24,905 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 15:27:24,905 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 15:27:24,905 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 15:27:24,905 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 15:27:24,905 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 15:27:24,906 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 15:27:24,906 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 15:27:24,944 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states. [2020-08-21 15:27:24,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 15:27:24,953 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:27:24,954 INFO L422 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] [2020-08-21 15:27:24,955 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:27:24,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:27:24,961 INFO L82 PathProgramCache]: Analyzing trace with hash 915174829, now seen corresponding path program 1 times [2020-08-21 15:27:24,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:27:24,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [900393119] [2020-08-21 15:27:24,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:27:25,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:27:27,068 WARN L193 SmtUtils]: Spent 1.46 s on a formula simplification that was a NOOP. DAG size: 514 [2020-08-21 15:27:27,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:27:27,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:27:27,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:27:27,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:27:27,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-21 15:27:27,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:27:27,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:27:27,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [900393119] [2020-08-21 15:27:27,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:27:27,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 15:27:27,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951809708] [2020-08-21 15:27:27,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 15:27:27,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:27:27,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 15:27:27,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 15:27:27,307 INFO L87 Difference]: Start difference. First operand 599 states. Second operand 5 states. [2020-08-21 15:27:29,140 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification that was a NOOP. DAG size: 516 [2020-08-21 15:27:38,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:27:38,379 INFO L93 Difference]: Finished difference Result 1404 states and 2054 transitions. [2020-08-21 15:27:38,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 15:27:38,382 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-08-21 15:27:38,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:27:38,410 INFO L225 Difference]: With dead ends: 1404 [2020-08-21 15:27:38,410 INFO L226 Difference]: Without dead ends: 854 [2020-08-21 15:27:38,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-08-21 15:27:38,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2020-08-21 15:27:38,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 590. [2020-08-21 15:27:38,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 590 states. [2020-08-21 15:27:38,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 812 transitions. [2020-08-21 15:27:38,623 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 812 transitions. Word has length 26 [2020-08-21 15:27:38,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:27:38,624 INFO L479 AbstractCegarLoop]: Abstraction has 590 states and 812 transitions. [2020-08-21 15:27:38,624 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 15:27:38,624 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 812 transitions. [2020-08-21 15:27:38,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-21 15:27:38,629 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:27:38,629 INFO L422 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] [2020-08-21 15:27:38,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 15:27:38,629 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:27:38,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:27:38,630 INFO L82 PathProgramCache]: Analyzing trace with hash 568046743, now seen corresponding path program 1 times [2020-08-21 15:27:38,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:27:38,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2115872404] [2020-08-21 15:27:38,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:27:38,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:27:39,990 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification that was a NOOP. DAG size: 514 [2020-08-21 15:27:39,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:27:40,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:27:40,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:27:40,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:27:40,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-21 15:27:40,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:27:40,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:27:40,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:27:40,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:27:40,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2115872404] [2020-08-21 15:27:40,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:27:40,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 15:27:40,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121206963] [2020-08-21 15:27:40,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 15:27:40,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:27:40,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 15:27:40,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-21 15:27:40,321 INFO L87 Difference]: Start difference. First operand 590 states and 812 transitions. Second operand 7 states. [2020-08-21 15:27:41,403 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification that was a NOOP. DAG size: 517 [2020-08-21 15:27:43,812 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification that was a NOOP. DAG size: 519 [2020-08-21 15:27:52,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:27:52,412 INFO L93 Difference]: Finished difference Result 1298 states and 1808 transitions. [2020-08-21 15:27:52,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 15:27:52,418 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-08-21 15:27:52,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:27:52,426 INFO L225 Difference]: With dead ends: 1298 [2020-08-21 15:27:52,426 INFO L226 Difference]: Without dead ends: 718 [2020-08-21 15:27:52,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-08-21 15:27:52,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2020-08-21 15:27:52,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 592. [2020-08-21 15:27:52,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 592 states. [2020-08-21 15:27:52,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 812 transitions. [2020-08-21 15:27:52,581 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 812 transitions. Word has length 38 [2020-08-21 15:27:52,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:27:52,582 INFO L479 AbstractCegarLoop]: Abstraction has 592 states and 812 transitions. [2020-08-21 15:27:52,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 15:27:52,582 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 812 transitions. [2020-08-21 15:27:52,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-21 15:27:52,584 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:27:52,584 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-21 15:27:52,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 15:27:52,585 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:27:52,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:27:52,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1713732304, now seen corresponding path program 1 times [2020-08-21 15:27:52,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:27:52,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1289111205] [2020-08-21 15:27:52,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:27:52,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:27:53,818 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification that was a NOOP. DAG size: 514 [2020-08-21 15:27:53,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:27:53,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:27:53,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:27:53,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:27:53,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-21 15:27:53,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:27:54,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:27:54,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:27:54,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 15:27:54,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1289111205] [2020-08-21 15:27:54,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:27:54,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 15:27:54,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791673169] [2020-08-21 15:27:54,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 15:27:54,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:27:54,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 15:27:54,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-21 15:27:54,108 INFO L87 Difference]: Start difference. First operand 592 states and 812 transitions. Second operand 7 states. [2020-08-21 15:27:55,229 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification that was a NOOP. DAG size: 517 [2020-08-21 15:27:57,062 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification that was a NOOP. DAG size: 519 [2020-08-21 15:28:06,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:28:06,385 INFO L93 Difference]: Finished difference Result 1300 states and 1805 transitions. [2020-08-21 15:28:06,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 15:28:06,385 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 40 [2020-08-21 15:28:06,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:28:06,391 INFO L225 Difference]: With dead ends: 1300 [2020-08-21 15:28:06,391 INFO L226 Difference]: Without dead ends: 718 [2020-08-21 15:28:06,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-08-21 15:28:06,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2020-08-21 15:28:06,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 592. [2020-08-21 15:28:06,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 592 states. [2020-08-21 15:28:06,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 811 transitions. [2020-08-21 15:28:06,535 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 811 transitions. Word has length 40 [2020-08-21 15:28:06,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:28:06,536 INFO L479 AbstractCegarLoop]: Abstraction has 592 states and 811 transitions. [2020-08-21 15:28:06,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 15:28:06,536 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 811 transitions. [2020-08-21 15:28:06,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-21 15:28:06,538 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:28:06,538 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-21 15:28:06,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 15:28:06,539 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:28:06,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:28:06,539 INFO L82 PathProgramCache]: Analyzing trace with hash -474975370, now seen corresponding path program 1 times [2020-08-21 15:28:06,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:28:06,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [314610638] [2020-08-21 15:28:06,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:28:06,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:28:07,812 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification that was a NOOP. DAG size: 514 [2020-08-21 15:28:07,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:28:07,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:28:07,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:28:07,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:28:08,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-21 15:28:08,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:28:08,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:28:08,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:28:08,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 15:28:08,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:28:08,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:28:08,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:28:08,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:28:08,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:28:08,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:28:08,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:28:08,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:28:08,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [314610638] [2020-08-21 15:28:08,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:28:08,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 15:28:08,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465400520] [2020-08-21 15:28:08,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 15:28:08,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:28:08,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 15:28:08,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-08-21 15:28:08,301 INFO L87 Difference]: Start difference. First operand 592 states and 811 transitions. Second operand 8 states. [2020-08-21 15:28:09,418 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification that was a NOOP. DAG size: 517 [2020-08-21 15:28:15,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:28:15,765 INFO L93 Difference]: Finished difference Result 1350 states and 1885 transitions. [2020-08-21 15:28:15,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 15:28:15,766 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 62 [2020-08-21 15:28:15,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:28:15,771 INFO L225 Difference]: With dead ends: 1350 [2020-08-21 15:28:15,771 INFO L226 Difference]: Without dead ends: 768 [2020-08-21 15:28:15,774 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-08-21 15:28:15,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2020-08-21 15:28:15,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 594. [2020-08-21 15:28:15,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 594 states. [2020-08-21 15:28:15,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 813 transitions. [2020-08-21 15:28:15,884 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 813 transitions. Word has length 62 [2020-08-21 15:28:15,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:28:15,885 INFO L479 AbstractCegarLoop]: Abstraction has 594 states and 813 transitions. [2020-08-21 15:28:15,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 15:28:15,885 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 813 transitions. [2020-08-21 15:28:15,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-08-21 15:28:15,887 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:28:15,888 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-08-21 15:28:15,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 15:28:15,888 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:28:15,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:28:15,888 INFO L82 PathProgramCache]: Analyzing trace with hash 2068084305, now seen corresponding path program 2 times [2020-08-21 15:28:15,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:28:15,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [650890746] [2020-08-21 15:28:15,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:28:15,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:28:17,164 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification that was a NOOP. DAG size: 514 [2020-08-21 15:28:17,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:28:17,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:28:17,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 15:28:17,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:28:17,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-21 15:28:17,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:28:17,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:28:17,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:28:17,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 15:28:17,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:28:17,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:28:17,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:28:17,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:28:17,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:28:17,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 15:28:17,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:28:17,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 15:28:17,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [650890746] [2020-08-21 15:28:17,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:28:17,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 15:28:17,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852357567] [2020-08-21 15:28:17,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 15:28:17,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:28:17,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 15:28:17,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-08-21 15:28:17,628 INFO L87 Difference]: Start difference. First operand 594 states and 813 transitions. Second operand 9 states. [2020-08-21 15:28:18,726 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification that was a NOOP. DAG size: 517