/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 enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=HIGHLEXORDER -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 0.1.25-5644d1e-m [2020-08-18 20:01:42,514 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 20:01:42,517 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 20:01:42,559 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 20:01:42,559 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 20:01:42,569 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 20:01:42,570 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 20:01:42,573 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 20:01:42,575 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 20:01:42,576 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 20:01:42,577 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 20:01:42,579 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 20:01:42,580 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 20:01:42,584 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 20:01:42,586 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 20:01:42,588 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 20:01:42,589 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 20:01:42,592 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 20:01:42,593 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 20:01:42,602 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 20:01:42,604 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 20:01:42,605 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 20:01:42,606 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 20:01:42,607 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 20:01:42,619 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 20:01:42,619 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 20:01:42,619 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 20:01:42,621 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 20:01:42,621 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 20:01:42,622 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 20:01:42,622 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 20:01:42,625 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 20:01:42,626 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 20:01:42,627 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 20:01:42,628 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 20:01:42,628 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 20:01:42,629 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 20:01:42,629 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 20:01:42,629 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 20:01:42,630 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 20:01:42,632 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 20:01:42,633 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 [2020-08-18 20:01:42,660 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 20:01:42,660 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 20:01:42,661 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 20:01:42,661 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 20:01:42,662 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 20:01:42,662 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 20:01:42,662 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 20:01:42,662 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 20:01:42,662 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 20:01:42,663 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 20:01:42,663 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 20:01:42,663 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 20:01:42,663 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 20:01:42,663 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 20:01:42,664 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 20:01:42,664 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 20:01:42,664 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 20:01:42,664 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 20:01:42,664 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 20:01:42,665 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 20:01:42,665 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 20:01:42,665 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 20:01:42,665 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 20:01:42,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 20:01:42,666 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 20:01:42,666 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 20:01:42,666 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-18 20:01:42,666 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 -> enumeration-timeout=5;interpolation-heuristic=HIGHLEXORDER; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=HIGHLEXORDER; [2020-08-18 20:01:42,931 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 20:01:42,952 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 20:01:42,956 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 20:01:42,958 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 20:01:42,958 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 20:01:42,959 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--net--arcnet--com90xx.ko-entry_point.cil.out.i [2020-08-18 20:01:43,018 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b96e41a19/fb60649f1cfa46eeb195257d4b8661a1/FLAGc4c251557 [2020-08-18 20:01:43,748 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 20:01:43,749 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--net--arcnet--com90xx.ko-entry_point.cil.out.i [2020-08-18 20:01:43,794 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b96e41a19/fb60649f1cfa46eeb195257d4b8661a1/FLAGc4c251557 [2020-08-18 20:01:43,852 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b96e41a19/fb60649f1cfa46eeb195257d4b8661a1 [2020-08-18 20:01:43,861 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 20:01:43,862 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 20:01:43,865 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 20:01:43,865 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 20:01:43,869 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 20:01:43,870 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 08:01:43" (1/1) ... [2020-08-18 20:01:43,873 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@610ce734 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:01:43, skipping insertion in model container [2020-08-18 20:01:43,873 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 08:01:43" (1/1) ... [2020-08-18 20:01:43,882 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 20:01:43,992 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 20:01:45,513 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 20:01:45,540 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 20:01:45,833 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 20:01:45,891 INFO L208 MainTranslator]: Completed translation [2020-08-18 20:01:45,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:01:45 WrapperNode [2020-08-18 20:01:45,892 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 20:01:45,895 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 20:01:45,896 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 20:01:45,896 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 20:01:45,907 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:01:45" (1/1) ... [2020-08-18 20:01:45,907 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:01:45" (1/1) ... [2020-08-18 20:01:45,947 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:01:45" (1/1) ... [2020-08-18 20:01:45,948 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:01:45" (1/1) ... [2020-08-18 20:01:46,045 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:01:45" (1/1) ... [2020-08-18 20:01:46,073 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:01:45" (1/1) ... [2020-08-18 20:01:46,102 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:01:45" (1/1) ... [2020-08-18 20:01:46,131 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 20:01:46,135 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 20:01:46,135 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 20:01:46,135 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 20:01:46,137 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:01:45" (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 [2020-08-18 20:01:46,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 20:01:46,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 20:01:46,216 INFO L138 BoogieDeclarations]: Found implementation of procedure readb [2020-08-18 20:01:46,217 INFO L138 BoogieDeclarations]: Found implementation of procedure writeb [2020-08-18 20:01:46,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ioremap [2020-08-18 20:01:46,218 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_fromio [2020-08-18 20:01:46,218 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_toio [2020-08-18 20:01:46,218 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2020-08-18 20:01:46,218 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2020-08-18 20:01:46,218 INFO L138 BoogieDeclarations]: Found implementation of procedure __kmalloc [2020-08-18 20:01:46,219 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2020-08-18 20:01:46,219 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2020-08-18 20:01:46,219 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 20:01:46,219 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2020-08-18 20:01:46,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2020-08-18 20:01:46,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2020-08-18 20:01:46,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2020-08-18 20:01:46,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2020-08-18 20:01:46,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_ulong [2020-08-18 20:01:46,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2020-08-18 20:01:46,225 INFO L138 BoogieDeclarations]: Found implementation of procedure request_irq [2020-08-18 20:01:46,225 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2020-08-18 20:01:46,225 INFO L138 BoogieDeclarations]: Found implementation of procedure com90xx_probe [2020-08-18 20:01:46,226 INFO L138 BoogieDeclarations]: Found implementation of procedure check_mirror [2020-08-18 20:01:46,226 INFO L138 BoogieDeclarations]: Found implementation of procedure com90xx_found [2020-08-18 20:01:46,226 INFO L138 BoogieDeclarations]: Found implementation of procedure com90xx_command [2020-08-18 20:01:46,226 INFO L138 BoogieDeclarations]: Found implementation of procedure com90xx_status [2020-08-18 20:01:46,226 INFO L138 BoogieDeclarations]: Found implementation of procedure com90xx_setmask [2020-08-18 20:01:46,226 INFO L138 BoogieDeclarations]: Found implementation of procedure com90xx_reset [2020-08-18 20:01:46,226 INFO L138 BoogieDeclarations]: Found implementation of procedure com90xx_copy_to_card [2020-08-18 20:01:46,227 INFO L138 BoogieDeclarations]: Found implementation of procedure com90xx_copy_from_card [2020-08-18 20:01:46,227 INFO L138 BoogieDeclarations]: Found implementation of procedure com90xx_init [2020-08-18 20:01:46,227 INFO L138 BoogieDeclarations]: Found implementation of procedure com90xx_exit [2020-08-18 20:01:46,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_1 [2020-08-18 20:01:46,227 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_suitable_irq_1 [2020-08-18 20:01:46,227 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_check_1 [2020-08-18 20:01:46,228 INFO L138 BoogieDeclarations]: Found implementation of procedure choose_interrupt_1 [2020-08-18 20:01:46,228 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_irq_1 [2020-08-18 20:01:46,228 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 20:01:46,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_request_irq_5 [2020-08-18 20:01:46,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_irq_6 [2020-08-18 20:01:46,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_irq_7 [2020-08-18 20:01:46,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2020-08-18 20:01:46,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2020-08-18 20:01:46,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_err_ptr [2020-08-18 20:01:46,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_ptr_err [2020-08-18 20:01:46,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err_or_null [2020-08-18 20:01:46,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_get [2020-08-18 20:01:46,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_try_module_get [2020-08-18 20:01:46,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put [2020-08-18 20:01:46,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put_and_exit [2020-08-18 20:01:46,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_refcount [2020-08-18 20:01:46,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2020-08-18 20:01:46,229 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2020-08-18 20:01:46,230 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2020-08-18 20:01:46,230 INFO L138 BoogieDeclarations]: Found implementation of procedure __request_region [2020-08-18 20:01:46,231 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_arcdev [2020-08-18 20:01:46,232 INFO L138 BoogieDeclarations]: Found implementation of procedure arcnet_interrupt [2020-08-18 20:01:46,232 INFO L138 BoogieDeclarations]: Found implementation of procedure free_irq [2020-08-18 20:01:46,232 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2020-08-18 20:01:46,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ioremap_nocache [2020-08-18 20:01:46,234 INFO L138 BoogieDeclarations]: Found implementation of procedure iounmap [2020-08-18 20:01:46,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize [2020-08-18 20:01:46,234 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2020-08-18 20:01:46,234 INFO L138 BoogieDeclarations]: Found implementation of procedure probe_irq_off [2020-08-18 20:01:46,234 INFO L138 BoogieDeclarations]: Found implementation of procedure probe_irq_on [2020-08-18 20:01:46,235 INFO L138 BoogieDeclarations]: Found implementation of procedure register_netdev [2020-08-18 20:01:46,235 INFO L138 BoogieDeclarations]: Found implementation of procedure request_threaded_irq [2020-08-18 20:01:46,235 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_netdev [2020-08-18 20:01:46,235 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2020-08-18 20:01:46,236 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2020-08-18 20:01:46,236 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-08-18 20:01:46,237 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2020-08-18 20:01:46,237 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 20:01:46,238 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2020-08-18 20:01:46,238 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2020-08-18 20:01:46,239 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2020-08-18 20:01:46,239 INFO L130 BoogieDeclarations]: Found specification of procedure __request_region [2020-08-18 20:01:46,240 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2020-08-18 20:01:46,240 INFO L130 BoogieDeclarations]: Found specification of procedure readb [2020-08-18 20:01:46,240 INFO L130 BoogieDeclarations]: Found specification of procedure writeb [2020-08-18 20:01:46,241 INFO L130 BoogieDeclarations]: Found specification of procedure ioremap_nocache [2020-08-18 20:01:46,241 INFO L130 BoogieDeclarations]: Found specification of procedure ioremap [2020-08-18 20:01:46,242 INFO L130 BoogieDeclarations]: Found specification of procedure iounmap [2020-08-18 20:01:46,242 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_fromio [2020-08-18 20:01:46,242 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2020-08-18 20:01:46,242 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_toio [2020-08-18 20:01:46,243 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2020-08-18 20:01:46,243 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2020-08-18 20:01:46,243 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2020-08-18 20:01:46,244 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2020-08-18 20:01:46,244 INFO L130 BoogieDeclarations]: Found specification of procedure __kmalloc [2020-08-18 20:01:46,244 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2020-08-18 20:01:46,244 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2020-08-18 20:01:46,244 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2020-08-18 20:01:46,244 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 20:01:46,245 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-18 20:01:46,245 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 20:01:46,245 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2020-08-18 20:01:46,245 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 20:01:46,245 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 20:01:46,245 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 20:01:46,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-08-18 20:01:46,246 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2020-08-18 20:01:46,246 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2020-08-18 20:01:46,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2020-08-18 20:01:46,246 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2020-08-18 20:01:46,246 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_ulong [2020-08-18 20:01:46,247 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2020-08-18 20:01:46,247 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_1 [2020-08-18 20:01:46,247 INFO L130 BoogieDeclarations]: Found specification of procedure activate_suitable_irq_1 [2020-08-18 20:01:46,248 INFO L130 BoogieDeclarations]: Found specification of procedure reg_check_1 [2020-08-18 20:01:46,248 INFO L130 BoogieDeclarations]: Found specification of procedure choose_interrupt_1 [2020-08-18 20:01:46,248 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_irq_1 [2020-08-18 20:01:46,248 INFO L130 BoogieDeclarations]: Found specification of procedure request_threaded_irq [2020-08-18 20:01:46,248 INFO L130 BoogieDeclarations]: Found specification of procedure request_irq [2020-08-18 20:01:46,249 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_request_irq_5 [2020-08-18 20:01:46,250 INFO L130 BoogieDeclarations]: Found specification of procedure free_irq [2020-08-18 20:01:46,250 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_irq_6 [2020-08-18 20:01:46,250 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_irq_7 [2020-08-18 20:01:46,250 INFO L130 BoogieDeclarations]: Found specification of procedure probe_irq_on [2020-08-18 20:01:46,251 INFO L130 BoogieDeclarations]: Found specification of procedure probe_irq_off [2020-08-18 20:01:46,251 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2020-08-18 20:01:46,252 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2020-08-18 20:01:46,252 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2020-08-18 20:01:46,253 INFO L130 BoogieDeclarations]: Found specification of procedure register_netdev [2020-08-18 20:01:46,253 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_netdev [2020-08-18 20:01:46,253 INFO L130 BoogieDeclarations]: Found specification of procedure arcnet_interrupt [2020-08-18 20:01:46,254 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_arcdev [2020-08-18 20:01:46,254 INFO L130 BoogieDeclarations]: Found specification of procedure com90xx_found [2020-08-18 20:01:46,254 INFO L130 BoogieDeclarations]: Found specification of procedure com90xx_command [2020-08-18 20:01:46,254 INFO L130 BoogieDeclarations]: Found specification of procedure com90xx_status [2020-08-18 20:01:46,255 INFO L130 BoogieDeclarations]: Found specification of procedure com90xx_setmask [2020-08-18 20:01:46,256 INFO L130 BoogieDeclarations]: Found specification of procedure com90xx_reset [2020-08-18 20:01:46,259 INFO L130 BoogieDeclarations]: Found specification of procedure com90xx_copy_to_card [2020-08-18 20:01:46,259 INFO L130 BoogieDeclarations]: Found specification of procedure com90xx_copy_from_card [2020-08-18 20:01:46,260 INFO L130 BoogieDeclarations]: Found specification of procedure com90xx_probe [2020-08-18 20:01:46,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 20:01:46,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 20:01:46,260 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 20:01:46,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 20:01:46,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-18 20:01:46,262 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-18 20:01:46,262 INFO L130 BoogieDeclarations]: Found specification of procedure check_mirror [2020-08-18 20:01:46,262 INFO L130 BoogieDeclarations]: Found specification of procedure com90xx_init [2020-08-18 20:01:46,271 INFO L130 BoogieDeclarations]: Found specification of procedure com90xx_exit [2020-08-18 20:01:46,271 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize [2020-08-18 20:01:46,271 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2020-08-18 20:01:46,271 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 20:01:46,271 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2020-08-18 20:01:46,272 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2020-08-18 20:01:46,272 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_err_ptr [2020-08-18 20:01:46,273 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_ptr_err [2020-08-18 20:01:46,273 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err_or_null [2020-08-18 20:01:46,273 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_get [2020-08-18 20:01:46,273 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_try_module_get [2020-08-18 20:01:46,273 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put [2020-08-18 20:01:46,273 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put_and_exit [2020-08-18 20:01:46,274 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_refcount [2020-08-18 20:01:46,274 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-18 20:01:46,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 20:01:46,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-18 20:01:46,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 20:01:46,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2020-08-18 20:01:46,275 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2020-08-18 20:01:46,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2020-08-18 20:01:46,275 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2020-08-18 20:01:47,289 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2020-08-18 20:01:47,295 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_module_put_and_exitFINAL: assume true; [2020-08-18 20:01:50,265 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 20:01:50,265 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 20:01:50,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 08:01:50 BoogieIcfgContainer [2020-08-18 20:01:50,289 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 20:01:50,291 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 20:01:50,291 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 20:01:50,296 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 20:01:50,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 08:01:43" (1/3) ... [2020-08-18 20:01:50,298 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@815a98c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 08:01:50, skipping insertion in model container [2020-08-18 20:01:50,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:01:45" (2/3) ... [2020-08-18 20:01:50,298 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@815a98c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 08:01:50, skipping insertion in model container [2020-08-18 20:01:50,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 08:01:50" (3/3) ... [2020-08-18 20:01:50,300 INFO L109 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--net--arcnet--com90xx.ko-entry_point.cil.out.i [2020-08-18 20:01:50,314 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 20:01:50,325 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 20:01:50,343 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 20:01:50,382 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 20:01:50,382 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 20:01:50,383 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 20:01:50,383 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 20:01:50,383 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 20:01:50,383 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 20:01:50,384 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 20:01:50,384 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 20:01:50,428 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states. [2020-08-18 20:01:50,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 20:01:50,443 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:01:50,444 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] [2020-08-18 20:01:50,445 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:01:50,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:01:50,451 INFO L82 PathProgramCache]: Analyzing trace with hash 915174829, now seen corresponding path program 1 times [2020-08-18 20:01:50,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:01:50,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608774635] [2020-08-18 20:01:50,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:01:50,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:01:52,825 WARN L193 SmtUtils]: Spent 1.54 s on a formula simplification that was a NOOP. DAG size: 514 [2020-08-18 20:01:52,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:01:52,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:01:52,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 20:01:52,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:01:52,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 20:01:52,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:01:53,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:01:53,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608774635] [2020-08-18 20:01:53,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:01:53,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 20:01:53,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199516598] [2020-08-18 20:01:53,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 20:01:53,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:01:53,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 20:01:53,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 20:01:53,042 INFO L87 Difference]: Start difference. First operand 599 states. Second operand 5 states. [2020-08-18 20:01:55,060 WARN L193 SmtUtils]: Spent 1.38 s on a formula simplification that was a NOOP. DAG size: 516 [2020-08-18 20:02:05,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:02:05,217 INFO L93 Difference]: Finished difference Result 1404 states and 2054 transitions. [2020-08-18 20:02:05,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 20:02:05,220 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-08-18 20:02:05,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:02:05,245 INFO L225 Difference]: With dead ends: 1404 [2020-08-18 20:02:05,246 INFO L226 Difference]: Without dead ends: 854 [2020-08-18 20:02:05,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-08-18 20:02:05,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2020-08-18 20:02:05,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 590. [2020-08-18 20:02:05,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 590 states. [2020-08-18 20:02:05,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 812 transitions. [2020-08-18 20:02:05,489 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 812 transitions. Word has length 26 [2020-08-18 20:02:05,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:02:05,489 INFO L479 AbstractCegarLoop]: Abstraction has 590 states and 812 transitions. [2020-08-18 20:02:05,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 20:02:05,490 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 812 transitions. [2020-08-18 20:02:05,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-18 20:02:05,492 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:02:05,493 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] [2020-08-18 20:02:05,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 20:02:05,493 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:02:05,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:02:05,494 INFO L82 PathProgramCache]: Analyzing trace with hash 568046743, now seen corresponding path program 1 times [2020-08-18 20:02:05,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:02:05,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102962819] [2020-08-18 20:02:05,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:02:05,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:02:06,881 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification that was a NOOP. DAG size: 514 [2020-08-18 20:02:06,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:02:06,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:02:07,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 20:02:07,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:02:07,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-18 20:02:07,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:02:07,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:02:07,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:02:07,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:02:07,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1102962819] [2020-08-18 20:02:07,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:02:07,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 20:02:07,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732037174] [2020-08-18 20:02:07,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 20:02:07,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:02:07,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 20:02:07,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-18 20:02:07,297 INFO L87 Difference]: Start difference. First operand 590 states and 812 transitions. Second operand 7 states. [2020-08-18 20:02:08,515 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification that was a NOOP. DAG size: 517 [2020-08-18 20:02:14,076 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification that was a NOOP. DAG size: 519 [2020-08-18 20:02:23,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:02:23,683 INFO L93 Difference]: Finished difference Result 1298 states and 1808 transitions. [2020-08-18 20:02:23,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 20:02:23,686 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-08-18 20:02:23,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:02:23,695 INFO L225 Difference]: With dead ends: 1298 [2020-08-18 20:02:23,696 INFO L226 Difference]: Without dead ends: 718 [2020-08-18 20:02:23,699 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-08-18 20:02:23,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2020-08-18 20:02:23,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 592. [2020-08-18 20:02:23,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 592 states. [2020-08-18 20:02:23,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 812 transitions. [2020-08-18 20:02:23,883 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 812 transitions. Word has length 38 [2020-08-18 20:02:23,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:02:23,883 INFO L479 AbstractCegarLoop]: Abstraction has 592 states and 812 transitions. [2020-08-18 20:02:23,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 20:02:23,884 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 812 transitions. [2020-08-18 20:02:23,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-18 20:02:23,891 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:02:23,892 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] [2020-08-18 20:02:23,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 20:02:23,892 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:02:23,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:02:23,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1713732304, now seen corresponding path program 1 times [2020-08-18 20:02:23,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:02:23,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1357638331] [2020-08-18 20:02:23,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:02:24,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:02:25,503 WARN L193 SmtUtils]: Spent 1.36 s on a formula simplification that was a NOOP. DAG size: 514 [2020-08-18 20:02:25,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:02:25,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:02:25,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 20:02:25,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:02:25,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-18 20:02:25,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:02:25,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:02:25,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:02:25,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-18 20:02:25,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1357638331] [2020-08-18 20:02:25,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:02:25,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 20:02:25,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444566064] [2020-08-18 20:02:25,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 20:02:25,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:02:25,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 20:02:25,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-18 20:02:25,833 INFO L87 Difference]: Start difference. First operand 592 states and 812 transitions. Second operand 7 states. [2020-08-18 20:02:27,072 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification that was a NOOP. DAG size: 517 [2020-08-18 20:02:29,577 WARN L193 SmtUtils]: Spent 1.26 s on a formula simplification that was a NOOP. DAG size: 519 [2020-08-18 20:02:39,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:02:39,972 INFO L93 Difference]: Finished difference Result 1300 states and 1805 transitions. [2020-08-18 20:02:39,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 20:02:39,972 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 40 [2020-08-18 20:02:39,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:02:39,985 INFO L225 Difference]: With dead ends: 1300 [2020-08-18 20:02:39,985 INFO L226 Difference]: Without dead ends: 718 [2020-08-18 20:02:39,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-08-18 20:02:39,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2020-08-18 20:02:40,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 592. [2020-08-18 20:02:40,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 592 states. [2020-08-18 20:02:40,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 811 transitions. [2020-08-18 20:02:40,149 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 811 transitions. Word has length 40 [2020-08-18 20:02:40,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:02:40,150 INFO L479 AbstractCegarLoop]: Abstraction has 592 states and 811 transitions. [2020-08-18 20:02:40,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 20:02:40,150 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 811 transitions. [2020-08-18 20:02:40,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-18 20:02:40,155 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:02:40,156 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] [2020-08-18 20:02:40,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 20:02:40,156 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:02:40,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:02:40,157 INFO L82 PathProgramCache]: Analyzing trace with hash -474975370, now seen corresponding path program 1 times [2020-08-18 20:02:40,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:02:40,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [789199002] [2020-08-18 20:02:40,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:02:40,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:02:41,620 WARN L193 SmtUtils]: Spent 1.29 s on a formula simplification that was a NOOP. DAG size: 514 [2020-08-18 20:02:41,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:02:41,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:02:41,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 20:02:41,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:02:41,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-08-18 20:02:41,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:02:41,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:02:41,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:02:41,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 20:02:41,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:02:41,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:02:41,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:02:41,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:02:41,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:02:42,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-18 20:02:42,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:02:42,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:02:42,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [789199002] [2020-08-18 20:02:42,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 20:02:42,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 20:02:42,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332537848] [2020-08-18 20:02:42,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 20:02:42,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:02:42,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 20:02:42,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-08-18 20:02:42,045 INFO L87 Difference]: Start difference. First operand 592 states and 811 transitions. Second operand 8 states. [2020-08-18 20:02:43,249 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification that was a NOOP. DAG size: 517