./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-5742d35-1-136_1a-drivers--usb--serial--ti_usb_3410_5052.ko-entry_point_ldv-val-v0.8.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717e84f4-d6c1-42bc-b376-d119ba49a136/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717e84f4-d6c1-42bc-b376-d119ba49a136/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717e84f4-d6c1-42bc-b376-d119ba49a136/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717e84f4-d6c1-42bc-b376-d119ba49a136/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-5742d35-1-136_1a-drivers--usb--serial--ti_usb_3410_5052.ko-entry_point_ldv-val-v0.8.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717e84f4-d6c1-42bc-b376-d119ba49a136/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717e84f4-d6c1-42bc-b376-d119ba49a136/bin/utaipan-EQgc7hIp5V --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 Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash ec1c916a4e8241683d3d78dd3b5f266227914917d53067d3c7741f08a3fdd65b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:10:11,744 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:10:11,747 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:10:11,799 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:10:11,801 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:10:11,803 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:10:11,805 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:10:11,810 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:10:11,814 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:10:11,816 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:10:11,817 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:10:11,820 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:10:11,821 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:10:11,829 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:10:11,831 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:10:11,834 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:10:11,837 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:10:11,840 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:10:11,843 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:10:11,849 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:10:11,856 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:10:11,858 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:10:11,859 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:10:11,861 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:10:11,866 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:10:11,871 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:10:11,872 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:10:11,873 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:10:11,874 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:10:11,876 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:10:11,877 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:10:11,878 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:10:11,880 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:10:11,881 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:10:11,883 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:10:11,883 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:10:11,884 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:10:11,884 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:10:11,884 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:10:11,885 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:10:11,886 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:10:11,887 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717e84f4-d6c1-42bc-b376-d119ba49a136/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-23 02:10:11,935 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:10:11,935 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:10:11,936 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:10:11,936 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:10:11,940 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:10:11,941 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:10:11,941 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:10:11,941 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:10:11,942 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:10:11,942 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:10:11,943 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:10:11,943 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:10:11,944 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:10:11,944 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:10:11,944 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:10:11,944 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:10:11,945 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:10:11,945 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:10:11,946 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:10:11,947 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:10:11,947 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:10:11,947 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:10:11,947 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:10:11,948 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:10:11,948 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:10:11,948 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:10:11,950 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:10:11,950 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:10:11,950 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:10:11,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:10:11,951 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:10:11,951 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:10:11,951 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:10:11,952 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:10:11,952 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:10:11,952 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:10:11,952 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:10:11,953 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:10:11,953 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_717e84f4-d6c1-42bc-b376-d119ba49a136/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717e84f4-d6c1-42bc-b376-d119ba49a136/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ec1c916a4e8241683d3d78dd3b5f266227914917d53067d3c7741f08a3fdd65b [2021-11-23 02:10:12,215 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:10:12,235 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:10:12,238 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:10:12,239 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:10:12,240 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:10:12,242 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717e84f4-d6c1-42bc-b376-d119ba49a136/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-5742d35-1-136_1a-drivers--usb--serial--ti_usb_3410_5052.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-23 02:10:12,340 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717e84f4-d6c1-42bc-b376-d119ba49a136/bin/utaipan-EQgc7hIp5V/data/c8bb0cc94/b64a6473fd5e46e397e2e837e348ced8/FLAGd570cb98c [2021-11-23 02:10:13,161 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:10:13,162 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717e84f4-d6c1-42bc-b376-d119ba49a136/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-5742d35-1-136_1a-drivers--usb--serial--ti_usb_3410_5052.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-23 02:10:13,199 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717e84f4-d6c1-42bc-b376-d119ba49a136/bin/utaipan-EQgc7hIp5V/data/c8bb0cc94/b64a6473fd5e46e397e2e837e348ced8/FLAGd570cb98c [2021-11-23 02:10:13,687 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717e84f4-d6c1-42bc-b376-d119ba49a136/bin/utaipan-EQgc7hIp5V/data/c8bb0cc94/b64a6473fd5e46e397e2e837e348ced8 [2021-11-23 02:10:13,689 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:10:13,690 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:10:13,691 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:10:13,691 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:10:13,697 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:10:13,698 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:10:13" (1/1) ... [2021-11-23 02:10:13,701 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c2b0e4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:13, skipping insertion in model container [2021-11-23 02:10:13,702 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:10:13" (1/1) ... [2021-11-23 02:10:13,711 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:10:13,832 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:10:15,428 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_717e84f4-d6c1-42bc-b376-d119ba49a136/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-5742d35-1-136_1a-drivers--usb--serial--ti_usb_3410_5052.ko-entry_point_ldv-val-v0.8.cil.out.i[218543,218556] [2021-11-23 02:10:15,476 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:10:15,539 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:10:15,879 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_717e84f4-d6c1-42bc-b376-d119ba49a136/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-5742d35-1-136_1a-drivers--usb--serial--ti_usb_3410_5052.ko-entry_point_ldv-val-v0.8.cil.out.i[218543,218556] [2021-11-23 02:10:15,887 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:10:15,962 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:10:15,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:15 WrapperNode [2021-11-23 02:10:15,963 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:10:15,964 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:10:15,965 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:10:15,965 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:10:15,973 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:15" (1/1) ... [2021-11-23 02:10:16,071 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:15" (1/1) ... [2021-11-23 02:10:16,281 INFO L137 Inliner]: procedures = 187, calls = 2219, calls flagged for inlining = 71, calls inlined = 71, statements flattened = 4636 [2021-11-23 02:10:16,282 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:10:16,282 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:10:16,283 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:10:16,284 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:10:16,293 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:15" (1/1) ... [2021-11-23 02:10:16,293 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:15" (1/1) ... [2021-11-23 02:10:16,348 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:15" (1/1) ... [2021-11-23 02:10:16,360 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:15" (1/1) ... [2021-11-23 02:10:16,486 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:15" (1/1) ... [2021-11-23 02:10:16,524 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:15" (1/1) ... [2021-11-23 02:10:16,557 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:15" (1/1) ... [2021-11-23 02:10:16,591 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:10:16,592 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:10:16,593 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:10:16,593 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:10:16,594 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:15" (1/1) ... [2021-11-23 02:10:16,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:10:16,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717e84f4-d6c1-42bc-b376-d119ba49a136/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:10:16,632 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717e84f4-d6c1-42bc-b376-d119ba49a136/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:10:16,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717e84f4-d6c1-42bc-b376-d119ba49a136/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:10:16,684 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_strcpy [2021-11-23 02:10:16,684 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_strcpy [2021-11-23 02:10:16,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-23 02:10:16,685 INFO L130 BoogieDeclarations]: Found specification of procedure ti_bulk_in_callback [2021-11-23 02:10:16,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_bulk_in_callback [2021-11-23 02:10:16,685 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2021-11-23 02:10:16,685 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2021-11-23 02:10:16,685 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2021-11-23 02:10:16,686 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-23 02:10:16,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-23 02:10:16,686 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-23 02:10:16,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-23 02:10:16,686 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:10:16,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-23 02:10:16,687 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-23 02:10:16,687 INFO L130 BoogieDeclarations]: Found specification of procedure tty_kref_put [2021-11-23 02:10:16,687 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_kref_put [2021-11-23 02:10:16,687 INFO L130 BoogieDeclarations]: Found specification of procedure ti_throttle [2021-11-23 02:10:16,687 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_throttle [2021-11-23 02:10:16,688 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_serial_deregister [2021-11-23 02:10:16,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_serial_deregister [2021-11-23 02:10:16,688 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_serial_port_data [2021-11-23 02:10:16,688 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_serial_port_data [2021-11-23 02:10:16,688 INFO L130 BoogieDeclarations]: Found specification of procedure ti_command_out_sync [2021-11-23 02:10:16,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_command_out_sync [2021-11-23 02:10:16,689 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2021-11-23 02:10:16,689 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2021-11-23 02:10:16,689 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-11-23 02:10:16,689 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-11-23 02:10:16,689 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-23 02:10:16,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-23 02:10:16,690 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2021-11-23 02:10:16,690 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2021-11-23 02:10:16,690 INFO L130 BoogieDeclarations]: Found specification of procedure ti_open [2021-11-23 02:10:16,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_open [2021-11-23 02:10:16,690 INFO L130 BoogieDeclarations]: Found specification of procedure ti_bulk_out_callback [2021-11-23 02:10:16,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_bulk_out_callback [2021-11-23 02:10:16,691 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_interruptible_nested [2021-11-23 02:10:16,691 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_interruptible_nested [2021-11-23 02:10:16,691 INFO L130 BoogieDeclarations]: Found specification of procedure ti_tiocmset [2021-11-23 02:10:16,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_tiocmset [2021-11-23 02:10:16,692 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-23 02:10:16,692 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-23 02:10:16,692 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_serial_port_data [2021-11-23 02:10:16,692 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_serial_port_data [2021-11-23 02:10:16,692 INFO L130 BoogieDeclarations]: Found specification of procedure ti_set_mcr [2021-11-23 02:10:16,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_set_mcr [2021-11-23 02:10:16,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:10:16,693 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-23 02:10:16,694 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-23 02:10:16,695 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2021-11-23 02:10:16,695 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2021-11-23 02:10:16,696 INFO L130 BoogieDeclarations]: Found specification of procedure ti_write_byte [2021-11-23 02:10:16,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_write_byte [2021-11-23 02:10:16,696 INFO L130 BoogieDeclarations]: Found specification of procedure ti_chars_in_buffer [2021-11-23 02:10:16,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_chars_in_buffer [2021-11-23 02:10:16,697 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-23 02:10:16,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-23 02:10:16,697 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irq [2021-11-23 02:10:16,697 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irq [2021-11-23 02:10:16,698 INFO L130 BoogieDeclarations]: Found specification of procedure ti_startup [2021-11-23 02:10:16,698 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_startup [2021-11-23 02:10:16,698 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-23 02:10:16,698 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-23 02:10:16,698 INFO L130 BoogieDeclarations]: Found specification of procedure ti_ioctl [2021-11-23 02:10:16,699 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_ioctl [2021-11-23 02:10:16,699 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_register [2021-11-23 02:10:16,699 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_register [2021-11-23 02:10:16,699 INFO L130 BoogieDeclarations]: Found specification of procedure ti_write_room [2021-11-23 02:10:16,699 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_write_room [2021-11-23 02:10:16,699 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-23 02:10:16,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-23 02:10:16,700 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-23 02:10:16,700 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-23 02:10:16,700 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_detach_2 [2021-11-23 02:10:16,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_detach_2 [2021-11-23 02:10:16,700 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_detach_1 [2021-11-23 02:10:16,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_detach_1 [2021-11-23 02:10:16,701 INFO L130 BoogieDeclarations]: Found specification of procedure ti_tiocmget [2021-11-23 02:10:16,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_tiocmget [2021-11-23 02:10:16,702 INFO L130 BoogieDeclarations]: Found specification of procedure msleep_interruptible [2021-11-23 02:10:16,702 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep_interruptible [2021-11-23 02:10:16,702 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:10:16,703 INFO L130 BoogieDeclarations]: Found specification of procedure __kfifo_free [2021-11-23 02:10:16,703 INFO L138 BoogieDeclarations]: Found implementation of procedure __kfifo_free [2021-11-23 02:10:16,703 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_debug_data [2021-11-23 02:10:16,704 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_debug_data [2021-11-23 02:10:16,704 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2021-11-23 02:10:16,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2021-11-23 02:10:16,705 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-23 02:10:16,705 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-23 02:10:16,705 INFO L130 BoogieDeclarations]: Found specification of procedure ti_interrupt_callback [2021-11-23 02:10:16,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_interrupt_callback [2021-11-23 02:10:16,706 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:10:16,706 INFO L130 BoogieDeclarations]: Found specification of procedure tty_wakeup [2021-11-23 02:10:16,706 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_wakeup [2021-11-23 02:10:16,707 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-23 02:10:16,707 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-23 02:10:16,707 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:10:16,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 02:10:16,707 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-23 02:10:16,707 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_serial_data [2021-11-23 02:10:16,708 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_serial_data [2021-11-23 02:10:16,708 INFO L130 BoogieDeclarations]: Found specification of procedure ti_close [2021-11-23 02:10:16,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_close [2021-11-23 02:10:16,709 INFO L130 BoogieDeclarations]: Found specification of procedure ti_break [2021-11-23 02:10:16,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_break [2021-11-23 02:10:16,709 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irq [2021-11-23 02:10:16,709 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irq [2021-11-23 02:10:16,709 INFO L130 BoogieDeclarations]: Found specification of procedure __swab16s [2021-11-23 02:10:16,710 INFO L138 BoogieDeclarations]: Found implementation of procedure __swab16s [2021-11-23 02:10:16,711 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 02:10:16,713 INFO L130 BoogieDeclarations]: Found specification of procedure usb_control_msg [2021-11-23 02:10:16,714 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_control_msg [2021-11-23 02:10:16,714 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2021-11-23 02:10:16,714 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2021-11-23 02:10:16,715 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2021-11-23 02:10:16,717 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2021-11-23 02:10:16,717 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-23 02:10:16,717 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-23 02:10:16,718 INFO L130 BoogieDeclarations]: Found specification of procedure ti_unthrottle [2021-11-23 02:10:16,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_unthrottle [2021-11-23 02:10:16,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:10:16,725 INFO L130 BoogieDeclarations]: Found specification of procedure ti_write [2021-11-23 02:10:16,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_write [2021-11-23 02:10:16,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 02:10:16,725 INFO L130 BoogieDeclarations]: Found specification of procedure ti_restart_read [2021-11-23 02:10:16,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_restart_read [2021-11-23 02:10:16,725 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-11-23 02:10:16,726 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-11-23 02:10:16,726 INFO L130 BoogieDeclarations]: Found specification of procedure ti_release [2021-11-23 02:10:16,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_release [2021-11-23 02:10:16,726 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-23 02:10:16,726 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-23 02:10:16,726 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-23 02:10:16,727 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-23 02:10:16,727 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab16 [2021-11-23 02:10:16,727 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab16 [2021-11-23 02:10:16,727 INFO L130 BoogieDeclarations]: Found specification of procedure request_firmware [2021-11-23 02:10:16,727 INFO L138 BoogieDeclarations]: Found implementation of procedure request_firmware [2021-11-23 02:10:16,727 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-11-23 02:10:16,728 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-11-23 02:10:16,728 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2021-11-23 02:10:16,728 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2021-11-23 02:10:16,728 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-11-23 02:10:16,728 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-11-23 02:10:16,728 INFO L130 BoogieDeclarations]: Found specification of procedure ti_send [2021-11-23 02:10:16,729 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_send [2021-11-23 02:10:16,729 INFO L130 BoogieDeclarations]: Found specification of procedure tty_port_tty_get [2021-11-23 02:10:16,729 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_port_tty_get [2021-11-23 02:10:16,729 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2021-11-23 02:10:16,729 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2021-11-23 02:10:16,729 INFO L130 BoogieDeclarations]: Found specification of procedure ti_drain [2021-11-23 02:10:16,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_drain [2021-11-23 02:10:16,730 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-11-23 02:10:16,730 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-11-23 02:10:16,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:10:16,730 INFO L130 BoogieDeclarations]: Found specification of procedure usb_clear_halt [2021-11-23 02:10:16,730 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_clear_halt [2021-11-23 02:10:16,731 INFO L130 BoogieDeclarations]: Found specification of procedure ti_set_termios [2021-11-23 02:10:16,731 INFO L138 BoogieDeclarations]: Found implementation of procedure ti_set_termios [2021-11-23 02:10:16,731 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_serial_data [2021-11-23 02:10:16,731 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_serial_data [2021-11-23 02:10:16,731 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-23 02:10:16,731 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-11-23 02:10:16,732 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-11-23 02:10:16,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:10:16,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:10:17,442 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:10:17,446 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:10:17,891 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-23 02:10:55,009 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:10:56,341 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:10:56,341 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 02:10:56,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:10:56 BoogieIcfgContainer [2021-11-23 02:10:56,347 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:10:56,350 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:10:56,350 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:10:56,353 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:10:56,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:10:13" (1/3) ... [2021-11-23 02:10:56,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14159a9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:10:56, skipping insertion in model container [2021-11-23 02:10:56,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:15" (2/3) ... [2021-11-23 02:10:56,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14159a9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:10:56, skipping insertion in model container [2021-11-23 02:10:56,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:10:56" (3/3) ... [2021-11-23 02:10:56,356 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-stable-5742d35-1-136_1a-drivers--usb--serial--ti_usb_3410_5052.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-23 02:10:56,370 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:10:56,370 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:10:56,443 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:10:56,459 INFO L339 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=FINITE_AUTOMATA, 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:10:56,459 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:10:56,525 INFO L276 IsEmpty]: Start isEmpty. Operand has 1187 states, 762 states have (on average 1.400262467191601) internal successors, (1067), 786 states have internal predecessors, (1067), 349 states have call successors, (349), 75 states have call predecessors, (349), 74 states have return successors, (343), 341 states have call predecessors, (343), 343 states have call successors, (343) [2021-11-23 02:10:56,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-23 02:10:56,540 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:10:56,541 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:10:56,542 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_usb_serial_deregisterErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_usb_serial_deregisterErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:10:56,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:10:56,547 INFO L85 PathProgramCache]: Analyzing trace with hash -665968716, now seen corresponding path program 1 times [2021-11-23 02:10:56,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:10:56,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087128940] [2021-11-23 02:10:56,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:56,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:10:57,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:57,646 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 562 trivial. 0 not checked. [2021-11-23 02:10:57,647 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:10:57,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087128940] [2021-11-23 02:10:57,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087128940] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:10:57,649 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:10:57,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:10:57,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872728371] [2021-11-23 02:10:57,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:10:57,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:10:57,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:10:57,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:10:57,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:10:57,704 INFO L87 Difference]: Start difference. First operand has 1187 states, 762 states have (on average 1.400262467191601) internal successors, (1067), 786 states have internal predecessors, (1067), 349 states have call successors, (349), 75 states have call predecessors, (349), 74 states have return successors, (343), 341 states have call predecessors, (343), 343 states have call successors, (343) Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2021-11-23 02:10:59,814 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:11:04,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:11:04,312 INFO L93 Difference]: Finished difference Result 3416 states and 5098 transitions. [2021-11-23 02:11:04,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:11:04,315 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 178 [2021-11-23 02:11:04,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:11:04,357 INFO L225 Difference]: With dead ends: 3416 [2021-11-23 02:11:04,358 INFO L226 Difference]: Without dead ends: 2252 [2021-11-23 02:11:04,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:11:04,376 INFO L933 BasicCegarLoop]: 1876 mSDtfsCounter, 1646 mSDsluCounter, 1702 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1646 SdHoareTripleChecker+Valid, 3404 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:11:04,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1646 Valid, 3404 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 371 Invalid, 1 Unknown, 0 Unchecked, 6.3s Time] [2021-11-23 02:11:04,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2252 states. [2021-11-23 02:11:04,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2252 to 2250. [2021-11-23 02:11:04,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2250 states, 1458 states have (on average 1.3991769547325104) internal successors, (2040), 1493 states have internal predecessors, (2040), 648 states have call successors, (648), 143 states have call predecessors, (648), 143 states have return successors, (647), 643 states have call predecessors, (647), 647 states have call successors, (647) [2021-11-23 02:11:04,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2250 states to 2250 states and 3335 transitions. [2021-11-23 02:11:04,672 INFO L78 Accepts]: Start accepts. Automaton has 2250 states and 3335 transitions. Word has length 178 [2021-11-23 02:11:04,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:11:04,676 INFO L470 AbstractCegarLoop]: Abstraction has 2250 states and 3335 transitions. [2021-11-23 02:11:04,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2021-11-23 02:11:04,678 INFO L276 IsEmpty]: Start isEmpty. Operand 2250 states and 3335 transitions. [2021-11-23 02:11:04,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-23 02:11:04,700 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:11:04,701 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:11:04,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:11:04,706 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_usb_serial_deregisterErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_usb_serial_deregisterErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:11:04,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:11:04,708 INFO L85 PathProgramCache]: Analyzing trace with hash 268158765, now seen corresponding path program 1 times [2021-11-23 02:11:04,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:11:04,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733857855] [2021-11-23 02:11:04,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:04,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:11:04,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:05,200 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2021-11-23 02:11:05,201 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:11:05,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733857855] [2021-11-23 02:11:05,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733857855] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:11:05,203 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:11:05,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:11:05,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912836776] [2021-11-23 02:11:05,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:11:05,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:11:05,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:11:05,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:11:05,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:11:05,207 INFO L87 Difference]: Start difference. First operand 2250 states and 3335 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-23 02:11:07,281 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:11:12,821 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:11:13,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:11:13,435 INFO L93 Difference]: Finished difference Result 4453 states and 6608 transitions. [2021-11-23 02:11:13,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:11:13,435 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 194 [2021-11-23 02:11:13,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:11:13,475 INFO L225 Difference]: With dead ends: 4453 [2021-11-23 02:11:13,475 INFO L226 Difference]: Without dead ends: 4445 [2021-11-23 02:11:13,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:11:13,481 INFO L933 BasicCegarLoop]: 1903 mSDtfsCounter, 1686 mSDsluCounter, 1673 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1686 SdHoareTripleChecker+Valid, 3396 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:11:13,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1686 Valid, 3396 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 369 Invalid, 1 Unknown, 0 Unchecked, 8.0s Time] [2021-11-23 02:11:13,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4445 states. [2021-11-23 02:11:13,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4445 to 4445. [2021-11-23 02:11:13,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4445 states, 2887 states have (on average 1.401801177693107) internal successors, (4047), 2956 states have internal predecessors, (4047), 1275 states have call successors, (1275), 284 states have call predecessors, (1275), 282 states have return successors, (1274), 1264 states have call predecessors, (1274), 1274 states have call successors, (1274) [2021-11-23 02:11:13,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4445 states to 4445 states and 6596 transitions. [2021-11-23 02:11:13,830 INFO L78 Accepts]: Start accepts. Automaton has 4445 states and 6596 transitions. Word has length 194 [2021-11-23 02:11:13,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:11:13,832 INFO L470 AbstractCegarLoop]: Abstraction has 4445 states and 6596 transitions. [2021-11-23 02:11:13,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-23 02:11:13,833 INFO L276 IsEmpty]: Start isEmpty. Operand 4445 states and 6596 transitions. [2021-11-23 02:11:13,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-11-23 02:11:13,841 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:11:13,841 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:11:13,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:11:13,842 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_usb_serial_deregisterErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_usb_serial_deregisterErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:11:13,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:11:13,843 INFO L85 PathProgramCache]: Analyzing trace with hash -2068351809, now seen corresponding path program 1 times [2021-11-23 02:11:13,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:11:13,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725384360] [2021-11-23 02:11:13,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:13,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:11:14,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:14,386 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 509 trivial. 0 not checked. [2021-11-23 02:11:14,386 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:11:14,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725384360] [2021-11-23 02:11:14,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725384360] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:11:14,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200640050] [2021-11-23 02:11:14,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:14,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:11:14,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717e84f4-d6c1-42bc-b376-d119ba49a136/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:11:14,390 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717e84f4-d6c1-42bc-b376-d119ba49a136/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:11:14,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717e84f4-d6c1-42bc-b376-d119ba49a136/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:11:15,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:15,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 4492 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 02:11:15,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:11:16,109 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2021-11-23 02:11:16,110 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:11:16,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200640050] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:11:16,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:11:16,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-11-23 02:11:16,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902504542] [2021-11-23 02:11:16,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:11:16,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:11:16,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:11:16,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:11:16,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:11:16,113 INFO L87 Difference]: Start difference. First operand 4445 states and 6596 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (23), 1 states have call predecessors, (23), 1 states have call successors, (23) [2021-11-23 02:11:18,192 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:11:25,338 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:11:27,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:11:27,127 INFO L93 Difference]: Finished difference Result 12748 states and 19686 transitions. [2021-11-23 02:11:27,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:11:27,128 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (23), 1 states have call predecessors, (23), 1 states have call successors, (23) Word has length 200 [2021-11-23 02:11:27,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:11:27,208 INFO L225 Difference]: With dead ends: 12748 [2021-11-23 02:11:27,208 INFO L226 Difference]: Without dead ends: 8342 [2021-11-23 02:11:27,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:11:27,246 INFO L933 BasicCegarLoop]: 2477 mSDtfsCounter, 1744 mSDsluCounter, 4781 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 234 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1977 SdHoareTripleChecker+Valid, 6875 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:11:27,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1977 Valid, 6875 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 595 Invalid, 2 Unknown, 0 Unchecked, 10.6s Time] [2021-11-23 02:11:27,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8342 states. [2021-11-23 02:11:27,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8342 to 4447. [2021-11-23 02:11:27,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4447 states, 2889 states have (on average 1.4015230183454483) internal successors, (4049), 2958 states have internal predecessors, (4049), 1275 states have call successors, (1275), 284 states have call predecessors, (1275), 282 states have return successors, (1274), 1264 states have call predecessors, (1274), 1274 states have call successors, (1274) [2021-11-23 02:11:27,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4447 states to 4447 states and 6598 transitions. [2021-11-23 02:11:27,639 INFO L78 Accepts]: Start accepts. Automaton has 4447 states and 6598 transitions. Word has length 200 [2021-11-23 02:11:27,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:11:27,641 INFO L470 AbstractCegarLoop]: Abstraction has 4447 states and 6598 transitions. [2021-11-23 02:11:27,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (23), 1 states have call predecessors, (23), 1 states have call successors, (23) [2021-11-23 02:11:27,641 INFO L276 IsEmpty]: Start isEmpty. Operand 4447 states and 6598 transitions. [2021-11-23 02:11:27,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-11-23 02:11:27,656 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:11:27,657 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:11:27,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717e84f4-d6c1-42bc-b376-d119ba49a136/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:11:27,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717e84f4-d6c1-42bc-b376-d119ba49a136/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:11:27,870 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_usb_serial_deregisterErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_usb_serial_deregisterErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:11:27,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:11:27,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1034582875, now seen corresponding path program 1 times [2021-11-23 02:11:27,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:11:27,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107779374] [2021-11-23 02:11:27,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:27,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:11:28,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:28,287 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2021-11-23 02:11:28,288 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:11:28,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107779374] [2021-11-23 02:11:28,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107779374] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:11:28,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:11:28,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:11:28,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867933266] [2021-11-23 02:11:28,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:11:28,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:11:28,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:11:28,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:11:28,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:11:28,294 INFO L87 Difference]: Start difference. First operand 4447 states and 6598 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-23 02:11:30,370 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:11:36,363 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:11:37,427 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:11:38,501 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:11:43,932 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:11:44,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:11:44,613 INFO L93 Difference]: Finished difference Result 8632 states and 12944 transitions. [2021-11-23 02:11:44,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:11:44,614 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 225 [2021-11-23 02:11:44,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:11:44,650 INFO L225 Difference]: With dead ends: 8632 [2021-11-23 02:11:44,651 INFO L226 Difference]: Without dead ends: 4224 [2021-11-23 02:11:44,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:11:44,689 INFO L933 BasicCegarLoop]: 3556 mSDtfsCounter, 2232 mSDsluCounter, 5178 mSDsCounter, 0 mSdLazyCounter, 1039 mSolverCounterSat, 116 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2232 SdHoareTripleChecker+Valid, 8194 SdHoareTripleChecker+Invalid, 1156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1039 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:11:44,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2232 Valid, 8194 Invalid, 1156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1039 Invalid, 1 Unknown, 0 Unchecked, 15.9s Time] [2021-11-23 02:11:44,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4224 states. [2021-11-23 02:11:44,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4224 to 3420. [2021-11-23 02:11:44,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3420 states, 2220 states have (on average 1.3963963963963963) internal successors, (3100), 2273 states have internal predecessors, (3100), 978 states have call successors, (978), 223 states have call predecessors, (978), 221 states have return successors, (977), 968 states have call predecessors, (977), 977 states have call successors, (977) [2021-11-23 02:11:44,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3420 states to 3420 states and 5055 transitions. [2021-11-23 02:11:44,925 INFO L78 Accepts]: Start accepts. Automaton has 3420 states and 5055 transitions. Word has length 225 [2021-11-23 02:11:44,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:11:44,929 INFO L470 AbstractCegarLoop]: Abstraction has 3420 states and 5055 transitions. [2021-11-23 02:11:44,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-23 02:11:44,932 INFO L276 IsEmpty]: Start isEmpty. Operand 3420 states and 5055 transitions. [2021-11-23 02:11:44,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2021-11-23 02:11:44,947 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:11:44,947 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:11:44,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:11:44,948 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_usb_serial_deregisterErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_usb_serial_deregisterErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:11:44,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:11:44,948 INFO L85 PathProgramCache]: Analyzing trace with hash 429469968, now seen corresponding path program 1 times [2021-11-23 02:11:44,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:11:44,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14104891] [2021-11-23 02:11:44,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:44,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:11:45,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:45,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1253 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1198 trivial. 0 not checked. [2021-11-23 02:11:45,444 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:11:45,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14104891] [2021-11-23 02:11:45,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14104891] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:11:45,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043537786] [2021-11-23 02:11:45,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:45,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:11:45,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717e84f4-d6c1-42bc-b376-d119ba49a136/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:11:45,446 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717e84f4-d6c1-42bc-b376-d119ba49a136/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:11:45,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717e84f4-d6c1-42bc-b376-d119ba49a136/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:11:48,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:48,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 5092 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 02:11:48,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:11:49,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1253 backedges. 477 proven. 0 refuted. 0 times theorem prover too weak. 776 trivial. 0 not checked. [2021-11-23 02:11:49,076 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:11:49,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043537786] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:11:49,076 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:11:49,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2021-11-23 02:11:49,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262523530] [2021-11-23 02:11:49,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:11:49,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:11:49,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:11:49,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:11:49,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:11:49,079 INFO L87 Difference]: Start difference. First operand 3420 states and 5055 transitions. Second operand has 6 states, 4 states have (on average 19.25) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (37), 2 states have call predecessors, (37), 4 states have return successors, (36), 3 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-23 02:11:51,157 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:11:56,027 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:11:59,241 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:12:01,258 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:12:03,736 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:12:05,163 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:12:06,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:12:06,357 INFO L93 Difference]: Finished difference Result 6828 states and 10144 transitions. [2021-11-23 02:12:06,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:12:06,358 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 19.25) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (37), 2 states have call predecessors, (37), 4 states have return successors, (36), 3 states have call predecessors, (36), 3 states have call successors, (36) Word has length 317 [2021-11-23 02:12:06,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:12:06,387 INFO L225 Difference]: With dead ends: 6828 [2021-11-23 02:12:06,387 INFO L226 Difference]: Without dead ends: 3427 [2021-11-23 02:12:06,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:12:06,409 INFO L933 BasicCegarLoop]: 1538 mSDtfsCounter, 3 mSDsluCounter, 6844 mSDsCounter, 0 mSdLazyCounter, 1011 mSolverCounterSat, 13 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 7659 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1011 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:12:06,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 7659 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1011 Invalid, 2 Unknown, 0 Unchecked, 17.1s Time] [2021-11-23 02:12:06,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3427 states. [2021-11-23 02:12:06,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3427 to 3427. [2021-11-23 02:12:06,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3427 states, 2224 states have (on average 1.3970323741007193) internal successors, (3107), 2280 states have internal predecessors, (3107), 978 states have call successors, (978), 223 states have call predecessors, (978), 224 states have return successors, (980), 968 states have call predecessors, (980), 977 states have call successors, (980) [2021-11-23 02:12:06,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3427 states to 3427 states and 5065 transitions. [2021-11-23 02:12:06,593 INFO L78 Accepts]: Start accepts. Automaton has 3427 states and 5065 transitions. Word has length 317 [2021-11-23 02:12:06,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:12:06,594 INFO L470 AbstractCegarLoop]: Abstraction has 3427 states and 5065 transitions. [2021-11-23 02:12:06,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 19.25) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (37), 2 states have call predecessors, (37), 4 states have return successors, (36), 3 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-23 02:12:06,594 INFO L276 IsEmpty]: Start isEmpty. Operand 3427 states and 5065 transitions. [2021-11-23 02:12:06,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2021-11-23 02:12:06,610 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:12:06,610 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:12:06,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717e84f4-d6c1-42bc-b376-d119ba49a136/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:12:06,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717e84f4-d6c1-42bc-b376-d119ba49a136/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:12:06,826 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_usb_serial_deregisterErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_usb_serial_deregisterErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:12:06,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:12:06,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1961953440, now seen corresponding path program 1 times [2021-11-23 02:12:06,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:12:06,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27073026] [2021-11-23 02:12:06,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:12:06,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:12:07,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:12:07,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1463 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 1374 trivial. 0 not checked. [2021-11-23 02:12:07,529 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:12:07,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27073026] [2021-11-23 02:12:07,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27073026] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:12:07,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89002848] [2021-11-23 02:12:07,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:12:07,529 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:12:07,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717e84f4-d6c1-42bc-b376-d119ba49a136/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:12:07,534 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717e84f4-d6c1-42bc-b376-d119ba49a136/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:12:07,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717e84f4-d6c1-42bc-b376-d119ba49a136/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:12:10,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:12:10,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 5164 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:12:10,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:12:11,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1463 backedges. 510 proven. 1 refuted. 0 times theorem prover too weak. 952 trivial. 0 not checked. [2021-11-23 02:12:11,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:12:13,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1463 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 1374 trivial. 0 not checked. [2021-11-23 02:12:13,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89002848] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:12:13,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1171317160] [2021-11-23 02:12:13,165 INFO L159 IcfgInterpreter]: Started Sifa with 110 locations of interest [2021-11-23 02:12:13,165 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:12:13,170 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:12:13,177 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:12:13,178 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:12:22,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:12:24,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:12:30,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:12:30,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:12:30,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:12:30,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:12:30,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:12:30,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:12:31,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:12:31,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:12:31,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:12:31,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:13:48,133 INFO L244 Elim1Store]: Index analysis took 86310 ms