./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc949a8-ac6c-423c-a131-27e2379f6df6/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc949a8-ac6c-423c-a131-27e2379f6df6/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc949a8-ac6c-423c-a131-27e2379f6df6/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc949a8-ac6c-423c-a131-27e2379f6df6/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc949a8-ac6c-423c-a131-27e2379f6df6/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc949a8-ac6c-423c-a131-27e2379f6df6/bin/uautomizer-J5u9QxTXDZ --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 83293f5c81ac30df7449dd9c03263a4edbba62be916a9a4fda92d2518792b8d4 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 10:19:39,539 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:19:39,543 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:19:39,612 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:19:39,613 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:19:39,618 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:19:39,621 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:19:39,628 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:19:39,631 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:19:39,638 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:19:39,639 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:19:39,643 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:19:39,643 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:19:39,647 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:19:39,649 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:19:39,652 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:19:39,655 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:19:39,656 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:19:39,659 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:19:39,671 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:19:39,673 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:19:39,675 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:19:39,679 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:19:39,680 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:19:39,693 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:19:39,693 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:19:39,694 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:19:39,696 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:19:39,698 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:19:39,699 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:19:39,700 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:19:39,701 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:19:39,704 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:19:39,705 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:19:39,707 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:19:39,707 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:19:39,708 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:19:39,709 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:19:39,709 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:19:39,710 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:19:39,711 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:19:39,712 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc949a8-ac6c-423c-a131-27e2379f6df6/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-10-17 10:19:39,765 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:19:39,765 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:19:39,766 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:19:39,766 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:19:39,767 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:19:39,768 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:19:39,769 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:19:39,769 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:19:39,769 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:19:39,770 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:19:39,771 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:19:39,772 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:19:39,772 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:19:39,772 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:19:39,773 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:19:39,773 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:19:39,773 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:19:39,774 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:19:39,774 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:19:39,774 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:19:39,775 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:19:39,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:19:39,775 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:19:39,776 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:19:39,776 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:19:39,776 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:19:39,777 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:19:39,777 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:19:39,777 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:19:39,778 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:19:39,778 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc949a8-ac6c-423c-a131-27e2379f6df6/bin/uautomizer-J5u9QxTXDZ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc949a8-ac6c-423c-a131-27e2379f6df6/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83293f5c81ac30df7449dd9c03263a4edbba62be916a9a4fda92d2518792b8d4 [2022-10-17 10:19:40,138 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:19:40,165 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:19:40,168 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:19:40,169 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:19:40,170 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:19:40,172 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc949a8-ac6c-423c-a131-27e2379f6df6/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i [2022-10-17 10:19:40,259 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc949a8-ac6c-423c-a131-27e2379f6df6/bin/uautomizer-J5u9QxTXDZ/data/f405ae72d/76c642d015254b0c9d2706c5037af6fd/FLAG60ce58a25 [2022-10-17 10:19:41,339 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:19:41,341 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc949a8-ac6c-423c-a131-27e2379f6df6/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i [2022-10-17 10:19:41,402 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc949a8-ac6c-423c-a131-27e2379f6df6/bin/uautomizer-J5u9QxTXDZ/data/f405ae72d/76c642d015254b0c9d2706c5037af6fd/FLAG60ce58a25 [2022-10-17 10:19:41,647 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc949a8-ac6c-423c-a131-27e2379f6df6/bin/uautomizer-J5u9QxTXDZ/data/f405ae72d/76c642d015254b0c9d2706c5037af6fd [2022-10-17 10:19:41,652 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:19:41,654 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:19:41,658 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:19:41,658 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:19:41,662 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:19:41,663 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:19:41" (1/1) ... [2022-10-17 10:19:41,664 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d93df16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:19:41, skipping insertion in model container [2022-10-17 10:19:41,665 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:19:41" (1/1) ... [2022-10-17 10:19:41,674 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:19:41,833 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:19:42,809 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc949a8-ac6c-423c-a131-27e2379f6df6/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i[163669,163682] [2022-10-17 10:19:43,468 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:19:43,498 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:19:43,696 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc949a8-ac6c-423c-a131-27e2379f6df6/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i[163669,163682] [2022-10-17 10:19:43,945 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:19:44,055 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:19:44,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:19:44 WrapperNode [2022-10-17 10:19:44,056 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:19:44,057 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:19:44,058 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:19:44,058 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:19:44,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:19:44" (1/1) ... [2022-10-17 10:19:44,136 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:19:44" (1/1) ... [2022-10-17 10:19:44,377 INFO L138 Inliner]: procedures = 175, calls = 797, calls flagged for inlining = 84, calls inlined = 84, statements flattened = 2260 [2022-10-17 10:19:44,377 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:19:44,378 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:19:44,379 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:19:44,379 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:19:44,390 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:19:44" (1/1) ... [2022-10-17 10:19:44,390 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:19:44" (1/1) ... [2022-10-17 10:19:44,434 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:19:44" (1/1) ... [2022-10-17 10:19:44,441 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:19:44" (1/1) ... [2022-10-17 10:19:44,545 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:19:44" (1/1) ... [2022-10-17 10:19:44,560 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:19:44" (1/1) ... [2022-10-17 10:19:44,593 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:19:44" (1/1) ... [2022-10-17 10:19:44,614 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:19:44" (1/1) ... [2022-10-17 10:19:44,656 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:19:44,663 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:19:44,664 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:19:44,664 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:19:44,665 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:19:44" (1/1) ... [2022-10-17 10:19:44,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:19:44,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc949a8-ac6c-423c-a131-27e2379f6df6/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:19:44,710 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc949a8-ac6c-423c-a131-27e2379f6df6/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:19:44,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cc949a8-ac6c-423c-a131-27e2379f6df6/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:19:44,773 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2022-10-17 10:19:44,774 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2022-10-17 10:19:44,774 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab32 [2022-10-17 10:19:44,774 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab32 [2022-10-17 10:19:44,774 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_fill_bulk_urb_2 [2022-10-17 10:19:44,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_fill_bulk_urb_2 [2022-10-17 10:19:44,775 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata_15 [2022-10-17 10:19:44,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata_15 [2022-10-17 10:19:44,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-10-17 10:19:44,775 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_3 [2022-10-17 10:19:44,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_3 [2022-10-17 10:19:44,776 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-10-17 10:19:44,776 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-10-17 10:19:44,776 INFO L130 BoogieDeclarations]: Found specification of procedure usb_bulk_msg [2022-10-17 10:19:44,776 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_bulk_msg [2022-10-17 10:19:44,776 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-10-17 10:19:44,777 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-10-17 10:19:44,777 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 10:19:44,777 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2022-10-17 10:19:44,777 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2022-10-17 10:19:44,777 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_present [2022-10-17 10:19:44,778 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_present [2022-10-17 10:19:44,778 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2022-10-17 10:19:44,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2022-10-17 10:19:44,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-10-17 10:19:44,778 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-10-17 10:19:44,779 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-10-17 10:19:44,779 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-10-17 10:19:44,779 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-10-17 10:19:44,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-10-17 10:19:44,779 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc_urb [2022-10-17 10:19:44,780 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc_urb [2022-10-17 10:19:44,780 INFO L130 BoogieDeclarations]: Found specification of procedure usb_8dev_read_bulk_callback [2022-10-17 10:19:44,780 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_8dev_read_bulk_callback [2022-10-17 10:19:44,780 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_anchored_urbs [2022-10-17 10:19:44,780 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_anchored_urbs [2022-10-17 10:19:44,780 INFO L130 BoogieDeclarations]: Found specification of procedure init_usb_anchor [2022-10-17 10:19:44,781 INFO L138 BoogieDeclarations]: Found implementation of procedure init_usb_anchor [2022-10-17 10:19:44,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 10:19:44,782 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-10-17 10:19:44,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-10-17 10:19:44,782 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-10-17 10:19:44,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-10-17 10:19:44,782 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-10-17 10:19:44,782 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-10-17 10:19:44,783 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-10-17 10:19:44,783 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-10-17 10:19:44,783 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2022-10-17 10:19:44,784 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2022-10-17 10:19:44,784 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-17 10:19:44,784 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2022-10-17 10:19:44,784 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2022-10-17 10:19:44,784 INFO L130 BoogieDeclarations]: Found specification of procedure unlink_all_urbs [2022-10-17 10:19:44,785 INFO L138 BoogieDeclarations]: Found implementation of procedure unlink_all_urbs [2022-10-17 10:19:44,785 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:19:44,785 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2022-10-17 10:19:44,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2022-10-17 10:19:44,787 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 10:19:44,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-10-17 10:19:44,788 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2022-10-17 10:19:44,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2022-10-17 10:19:44,788 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2022-10-17 10:19:44,789 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2022-10-17 10:19:44,789 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_coherent [2022-10-17 10:19:44,789 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_coherent [2022-10-17 10:19:44,790 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-10-17 10:19:44,790 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec [2022-10-17 10:19:44,791 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec [2022-10-17 10:19:44,791 INFO L130 BoogieDeclarations]: Found specification of procedure netif_rx [2022-10-17 10:19:44,791 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_rx [2022-10-17 10:19:44,791 INFO L130 BoogieDeclarations]: Found specification of procedure usb_anchor_urb [2022-10-17 10:19:44,791 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_anchor_urb [2022-10-17 10:19:44,792 INFO L130 BoogieDeclarations]: Found specification of procedure can_led_event [2022-10-17 10:19:44,793 INFO L138 BoogieDeclarations]: Found implementation of procedure can_led_event [2022-10-17 10:19:44,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 10:19:44,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-10-17 10:19:44,793 INFO L130 BoogieDeclarations]: Found specification of procedure usb_8dev_disconnect [2022-10-17 10:19:44,793 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_8dev_disconnect [2022-10-17 10:19:44,794 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_detach [2022-10-17 10:19:44,794 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_detach [2022-10-17 10:19:44,794 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2022-10-17 10:19:44,794 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2022-10-17 10:19:44,794 INFO L130 BoogieDeclarations]: Found specification of procedure usb_unanchor_urb [2022-10-17 10:19:44,794 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_unanchor_urb [2022-10-17 10:19:44,795 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-10-17 10:19:44,795 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-10-17 10:19:44,795 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_urb [2022-10-17 10:19:44,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_urb [2022-10-17 10:19:44,795 INFO L130 BoogieDeclarations]: Found specification of procedure close_candev [2022-10-17 10:19:44,796 INFO L138 BoogieDeclarations]: Found implementation of procedure close_candev [2022-10-17 10:19:44,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:19:44,797 INFO L130 BoogieDeclarations]: Found specification of procedure free_candev [2022-10-17 10:19:44,797 INFO L138 BoogieDeclarations]: Found implementation of procedure free_candev [2022-10-17 10:19:44,797 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_netdev [2022-10-17 10:19:44,797 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_netdev [2022-10-17 10:19:44,798 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-10-17 10:19:44,799 INFO L130 BoogieDeclarations]: Found specification of procedure usb_8dev_send_cmd [2022-10-17 10:19:44,799 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_8dev_send_cmd [2022-10-17 10:19:44,799 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-10-17 10:19:44,799 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-10-17 10:19:44,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:19:44,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:19:44,801 INFO L130 BoogieDeclarations]: Found specification of procedure usb_8dev_cmd_open [2022-10-17 10:19:44,801 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_8dev_cmd_open [2022-10-17 10:19:45,557 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:19:45,561 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:19:45,891 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-10-17 10:19:46,904 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2022-10-17 10:19:52,238 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:19:52,255 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:19:52,255 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-10-17 10:19:52,259 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:19:52 BoogieIcfgContainer [2022-10-17 10:19:52,260 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:19:52,263 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:19:52,263 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:19:52,267 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:19:52,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:19:41" (1/3) ... [2022-10-17 10:19:52,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a1792c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:19:52, skipping insertion in model container [2022-10-17 10:19:52,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:19:44" (2/3) ... [2022-10-17 10:19:52,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a1792c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:19:52, skipping insertion in model container [2022-10-17 10:19:52,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:19:52" (3/3) ... [2022-10-17 10:19:52,271 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i [2022-10-17 10:19:52,292 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:19:52,293 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 10:19:52,411 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:19:52,419 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@664d0b93, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:19:52,420 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 10:19:52,429 INFO L276 IsEmpty]: Start isEmpty. Operand has 675 states, 499 states have (on average 1.3547094188376754) internal successors, (676), 518 states have internal predecessors, (676), 132 states have call successors, (132), 44 states have call predecessors, (132), 42 states have return successors, (126), 125 states have call predecessors, (126), 126 states have call successors, (126) [2022-10-17 10:19:52,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-10-17 10:19:52,443 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:19:52,444 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:19:52,444 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:19:52,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:19:52,451 INFO L85 PathProgramCache]: Analyzing trace with hash 180613716, now seen corresponding path program 1 times [2022-10-17 10:19:52,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:19:52,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915261963] [2022-10-17 10:19:52,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:19:52,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:19:52,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:19:53,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:19:53,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:19:53,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-10-17 10:19:53,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:19:53,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 10:19:53,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:19:53,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915261963] [2022-10-17 10:19:53,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915261963] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:19:53,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:19:53,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:19:53,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900886913] [2022-10-17 10:19:53,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:19:53,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:19:53,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:19:53,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:19:53,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:19:53,342 INFO L87 Difference]: Start difference. First operand has 675 states, 499 states have (on average 1.3547094188376754) internal successors, (676), 518 states have internal predecessors, (676), 132 states have call successors, (132), 44 states have call predecessors, (132), 42 states have return successors, (126), 125 states have call predecessors, (126), 126 states have call successors, (126) Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 10:19:58,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:19:58,716 INFO L93 Difference]: Finished difference Result 2087 states and 2983 transitions. [2022-10-17 10:19:58,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:19:58,719 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2022-10-17 10:19:58,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:19:58,762 INFO L225 Difference]: With dead ends: 2087 [2022-10-17 10:19:58,762 INFO L226 Difference]: Without dead ends: 1393 [2022-10-17 10:19:58,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:19:58,789 INFO L413 NwaCegarLoop]: 986 mSDtfsCounter, 1147 mSDsluCounter, 1096 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 360 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1252 SdHoareTripleChecker+Valid, 2082 SdHoareTripleChecker+Invalid, 1028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 360 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:19:58,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1252 Valid, 2082 Invalid, 1028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [360 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-10-17 10:19:58,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1393 states. [2022-10-17 10:19:59,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1393 to 1287. [2022-10-17 10:19:59,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1287 states, 961 states have (on average 1.3121748178980228) internal successors, (1261), 979 states have internal predecessors, (1261), 243 states have call successors, (243), 83 states have call predecessors, (243), 82 states have return successors, (238), 236 states have call predecessors, (238), 238 states have call successors, (238) [2022-10-17 10:19:59,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1287 states to 1287 states and 1742 transitions. [2022-10-17 10:19:59,054 INFO L78 Accepts]: Start accepts. Automaton has 1287 states and 1742 transitions. Word has length 28 [2022-10-17 10:19:59,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:19:59,055 INFO L495 AbstractCegarLoop]: Abstraction has 1287 states and 1742 transitions. [2022-10-17 10:19:59,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 10:19:59,056 INFO L276 IsEmpty]: Start isEmpty. Operand 1287 states and 1742 transitions. [2022-10-17 10:19:59,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-10-17 10:19:59,068 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:19:59,068 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:19:59,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 10:19:59,069 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:19:59,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:19:59,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1706361993, now seen corresponding path program 1 times [2022-10-17 10:19:59,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:19:59,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038680037] [2022-10-17 10:19:59,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:19:59,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:19:59,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:19:59,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:19:59,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:19:59,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-10-17 10:19:59,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:19:59,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-10-17 10:19:59,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:19:59,755 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-17 10:19:59,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:19:59,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038680037] [2022-10-17 10:19:59,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038680037] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:19:59,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:19:59,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:19:59,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532356941] [2022-10-17 10:19:59,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:19:59,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:19:59,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:19:59,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:19:59,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:19:59,761 INFO L87 Difference]: Start difference. First operand 1287 states and 1742 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 10:20:04,901 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-17 10:20:05,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:20:05,257 INFO L93 Difference]: Finished difference Result 4058 states and 5609 transitions. [2022-10-17 10:20:05,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:20:05,258 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 38 [2022-10-17 10:20:05,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:20:05,286 INFO L225 Difference]: With dead ends: 4058 [2022-10-17 10:20:05,286 INFO L226 Difference]: Without dead ends: 2778 [2022-10-17 10:20:05,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:20:05,296 INFO L413 NwaCegarLoop]: 1296 mSDtfsCounter, 1053 mSDsluCounter, 1231 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1151 SdHoareTripleChecker+Valid, 2527 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:20:05,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1151 Valid, 2527 Invalid, 1032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-10-17 10:20:05,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2778 states. [2022-10-17 10:20:05,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2778 to 2556. [2022-10-17 10:20:05,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2556 states, 1912 states have (on average 1.3106694560669456) internal successors, (2506), 1944 states have internal predecessors, (2506), 479 states have call successors, (479), 165 states have call predecessors, (479), 164 states have return successors, (488), 470 states have call predecessors, (488), 474 states have call successors, (488) [2022-10-17 10:20:05,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2556 states to 2556 states and 3473 transitions. [2022-10-17 10:20:05,510 INFO L78 Accepts]: Start accepts. Automaton has 2556 states and 3473 transitions. Word has length 38 [2022-10-17 10:20:05,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:20:05,511 INFO L495 AbstractCegarLoop]: Abstraction has 2556 states and 3473 transitions. [2022-10-17 10:20:05,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 10:20:05,512 INFO L276 IsEmpty]: Start isEmpty. Operand 2556 states and 3473 transitions. [2022-10-17 10:20:05,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-10-17 10:20:05,516 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:20:05,517 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:20:05,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 10:20:05,517 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:20:05,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:20:05,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1357219976, now seen corresponding path program 1 times [2022-10-17 10:20:05,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:20:05,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375573942] [2022-10-17 10:20:05,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:20:05,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:20:05,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:20:06,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:20:06,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:20:06,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-10-17 10:20:06,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:20:06,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-10-17 10:20:06,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:20:06,086 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-17 10:20:06,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:20:06,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375573942] [2022-10-17 10:20:06,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375573942] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:20:06,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:20:06,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:20:06,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473842229] [2022-10-17 10:20:06,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:20:06,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:20:06,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:20:06,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:20:06,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:20:06,090 INFO L87 Difference]: Start difference. First operand 2556 states and 3473 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 10:20:07,755 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []