./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-drivers-clk1_drivers-net-can-mcp251x.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11aef55-beb7-46e8-bd3a-35ddbf6f8999/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11aef55-beb7-46e8-bd3a-35ddbf6f8999/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11aef55-beb7-46e8-bd3a-35ddbf6f8999/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11aef55-beb7-46e8-bd3a-35ddbf6f8999/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-drivers-clk1_drivers-net-can-mcp251x.cil.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11aef55-beb7-46e8-bd3a-35ddbf6f8999/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11aef55-beb7-46e8-bd3a-35ddbf6f8999/bin/utaipan-eEHZpOm5b7 --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 384d76f2b579c3776890746933030ac5fcfc9487f32fbc530ea50ee4dc8551b1 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 17:53:43,837 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 17:53:43,841 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 17:53:43,899 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 17:53:43,900 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 17:53:43,904 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 17:53:43,906 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 17:53:43,909 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 17:53:43,911 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 17:53:43,912 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 17:53:43,913 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 17:53:43,915 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 17:53:43,915 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 17:53:43,917 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 17:53:43,918 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 17:53:43,920 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 17:53:43,921 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 17:53:43,922 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 17:53:43,924 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 17:53:43,926 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 17:53:43,928 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 17:53:43,929 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 17:53:43,931 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 17:53:43,931 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 17:53:43,935 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 17:53:43,935 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 17:53:43,936 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 17:53:43,937 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 17:53:43,937 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 17:53:43,939 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 17:53:43,939 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 17:53:43,940 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 17:53:43,941 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 17:53:43,942 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 17:53:43,943 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 17:53:43,943 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 17:53:43,944 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 17:53:43,944 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 17:53:43,944 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 17:53:43,946 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 17:53:43,946 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 17:53:43,947 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11aef55-beb7-46e8-bd3a-35ddbf6f8999/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-25 17:53:43,989 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 17:53:43,992 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 17:53:43,993 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 17:53:43,994 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 17:53:43,995 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 17:53:44,003 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 17:53:44,003 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 17:53:44,003 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 17:53:44,004 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 17:53:44,004 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 17:53:44,005 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 17:53:44,006 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 17:53:44,006 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 17:53:44,006 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 17:53:44,006 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 17:53:44,007 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 17:53:44,007 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 17:53:44,007 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 17:53:44,009 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 17:53:44,010 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 17:53:44,010 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 17:53:44,010 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 17:53:44,011 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 17:53:44,011 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 17:53:44,011 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 17:53:44,012 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 17:53:44,013 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 17:53:44,014 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 17:53:44,014 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 17:53:44,014 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 17:53:44,015 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 17:53:44,015 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 17:53:44,015 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 17:53:44,016 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 17:53:44,016 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 17:53:44,016 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 17:53:44,016 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 17:53:44,017 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 17:53:44,017 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_a11aef55-beb7-46e8-bd3a-35ddbf6f8999/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11aef55-beb7-46e8-bd3a-35ddbf6f8999/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 384d76f2b579c3776890746933030ac5fcfc9487f32fbc530ea50ee4dc8551b1 [2021-11-25 17:53:44,321 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 17:53:44,344 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 17:53:44,347 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 17:53:44,348 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 17:53:44,349 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 17:53:44,350 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11aef55-beb7-46e8-bd3a-35ddbf6f8999/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-drivers-clk1_drivers-net-can-mcp251x.cil.i [2021-11-25 17:53:44,434 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11aef55-beb7-46e8-bd3a-35ddbf6f8999/bin/utaipan-eEHZpOm5b7/data/44614cbe1/2b5004ccd87043b19ad91a4beb75c5dd/FLAGf10b9eeaf [2021-11-25 17:53:45,481 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 17:53:45,482 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11aef55-beb7-46e8-bd3a-35ddbf6f8999/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-drivers-clk1_drivers-net-can-mcp251x.cil.i [2021-11-25 17:53:45,543 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11aef55-beb7-46e8-bd3a-35ddbf6f8999/bin/utaipan-eEHZpOm5b7/data/44614cbe1/2b5004ccd87043b19ad91a4beb75c5dd/FLAGf10b9eeaf [2021-11-25 17:53:45,854 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11aef55-beb7-46e8-bd3a-35ddbf6f8999/bin/utaipan-eEHZpOm5b7/data/44614cbe1/2b5004ccd87043b19ad91a4beb75c5dd [2021-11-25 17:53:45,857 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 17:53:45,859 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 17:53:45,861 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 17:53:45,862 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 17:53:45,866 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 17:53:45,867 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:53:45" (1/1) ... [2021-11-25 17:53:45,869 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c4c5024 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:53:45, skipping insertion in model container [2021-11-25 17:53:45,869 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:53:45" (1/1) ... [2021-11-25 17:53:45,879 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 17:53:46,036 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 17:53:48,753 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_a11aef55-beb7-46e8-bd3a-35ddbf6f8999/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-drivers-clk1_drivers-net-can-mcp251x.cil.i[269359,269372] [2021-11-25 17:53:48,777 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 17:53:48,815 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 17:53:49,200 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_a11aef55-beb7-46e8-bd3a-35ddbf6f8999/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-drivers-clk1_drivers-net-can-mcp251x.cil.i[269359,269372] [2021-11-25 17:53:49,217 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 17:53:49,379 INFO L208 MainTranslator]: Completed translation [2021-11-25 17:53:49,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:53:49 WrapperNode [2021-11-25 17:53:49,379 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 17:53:49,380 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 17:53:49,380 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 17:53:49,380 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 17:53:49,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:53:49" (1/1) ... [2021-11-25 17:53:49,498 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:53:49" (1/1) ... [2021-11-25 17:53:49,677 INFO L137 Inliner]: procedures = 306, calls = 1441, calls flagged for inlining = 179, calls inlined = 169, statements flattened = 3989 [2021-11-25 17:53:49,678 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 17:53:49,679 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 17:53:49,679 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 17:53:49,680 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 17:53:49,692 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:53:49" (1/1) ... [2021-11-25 17:53:49,692 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:53:49" (1/1) ... [2021-11-25 17:53:49,746 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:53:49" (1/1) ... [2021-11-25 17:53:49,747 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:53:49" (1/1) ... [2021-11-25 17:53:49,882 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:53:49" (1/1) ... [2021-11-25 17:53:49,926 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:53:49" (1/1) ... [2021-11-25 17:53:49,954 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:53:49" (1/1) ... [2021-11-25 17:53:49,981 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 17:53:49,982 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 17:53:49,982 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 17:53:49,983 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 17:53:49,984 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:53:49" (1/1) ... [2021-11-25 17:53:49,994 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 17:53:50,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11aef55-beb7-46e8-bd3a-35ddbf6f8999/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:53:50,021 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11aef55-beb7-46e8-bd3a-35ddbf6f8999/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 17:53:50,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11aef55-beb7-46e8-bd3a-35ddbf6f8999/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 17:53:50,072 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-25 17:53:50,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-25 17:53:50,073 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-25 17:53:50,073 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-25 17:53:50,073 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-25 17:53:50,074 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-25 17:53:50,074 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-25 17:53:50,074 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-25 17:53:50,074 INFO L130 BoogieDeclarations]: Found specification of procedure spi_sync [2021-11-25 17:53:50,074 INFO L138 BoogieDeclarations]: Found implementation of procedure spi_sync [2021-11-25 17:53:50,075 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-25 17:53:50,075 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-25 17:53:50,075 INFO L130 BoogieDeclarations]: Found specification of procedure mcp251x_open_clean [2021-11-25 17:53:50,075 INFO L138 BoogieDeclarations]: Found implementation of procedure mcp251x_open_clean [2021-11-25 17:53:50,075 INFO L130 BoogieDeclarations]: Found specification of procedure free_irq [2021-11-25 17:53:50,075 INFO L138 BoogieDeclarations]: Found implementation of procedure free_irq [2021-11-25 17:53:50,076 INFO L130 BoogieDeclarations]: Found specification of procedure devm_regulator_get [2021-11-25 17:53:50,076 INFO L138 BoogieDeclarations]: Found implementation of procedure devm_regulator_get [2021-11-25 17:53:50,076 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-25 17:53:50,076 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-25 17:53:50,076 INFO L130 BoogieDeclarations]: Found specification of procedure mcp251x_spi_trans [2021-11-25 17:53:50,077 INFO L138 BoogieDeclarations]: Found implementation of procedure mcp251x_spi_trans [2021-11-25 17:53:50,077 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_EMGentry_exit_mcp251x_can_driver_exit_12_2 [2021-11-25 17:53:50,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_EMGentry_exit_mcp251x_can_driver_exit_12_2 [2021-11-25 17:53:50,077 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_post_probe [2021-11-25 17:53:50,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_post_probe [2021-11-25 17:53:50,078 INFO L130 BoogieDeclarations]: Found specification of procedure mcp251x_read_reg [2021-11-25 17:53:50,078 INFO L138 BoogieDeclarations]: Found implementation of procedure mcp251x_read_reg [2021-11-25 17:53:50,078 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 17:53:50,078 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-11-25 17:53:50,078 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-11-25 17:53:50,079 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 17:53:50,079 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-25 17:53:50,079 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_xmalloc [2021-11-25 17:53:50,079 INFO L130 BoogieDeclarations]: Found specification of procedure mcp251x_stop [2021-11-25 17:53:50,079 INFO L138 BoogieDeclarations]: Found implementation of procedure mcp251x_stop [2021-11-25 17:53:50,080 INFO L130 BoogieDeclarations]: Found specification of procedure mcp251x_write_bits [2021-11-25 17:53:50,080 INFO L138 BoogieDeclarations]: Found implementation of procedure mcp251x_write_bits [2021-11-25 17:53:50,080 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-25 17:53:50,080 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-25 17:53:50,080 INFO L130 BoogieDeclarations]: Found specification of procedure netif_rx_ni [2021-11-25 17:53:50,081 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_rx_ni [2021-11-25 17:53:50,081 INFO L130 BoogieDeclarations]: Found specification of procedure can_led_event [2021-11-25 17:53:50,081 INFO L138 BoogieDeclarations]: Found implementation of procedure can_led_event [2021-11-25 17:53:50,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 17:53:50,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 17:53:50,082 INFO L130 BoogieDeclarations]: Found specification of procedure spi_message_add_tail [2021-11-25 17:53:50,082 INFO L138 BoogieDeclarations]: Found implementation of procedure spi_message_add_tail [2021-11-25 17:53:50,082 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_pre_probe [2021-11-25 17:53:50,082 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_pre_probe [2021-11-25 17:53:50,082 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-11-25 17:53:50,083 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-11-25 17:53:50,083 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-25 17:53:50,083 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-25 17:53:50,083 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-25 17:53:50,083 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-25 17:53:50,084 INFO L130 BoogieDeclarations]: Found specification of procedure to_spi_device [2021-11-25 17:53:50,084 INFO L138 BoogieDeclarations]: Found implementation of procedure to_spi_device [2021-11-25 17:53:50,084 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_filter_positive_int [2021-11-25 17:53:50,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_filter_positive_int [2021-11-25 17:53:50,085 INFO L130 BoogieDeclarations]: Found specification of procedure lockdep_init_map [2021-11-25 17:53:50,085 INFO L138 BoogieDeclarations]: Found implementation of procedure lockdep_init_map [2021-11-25 17:53:50,085 INFO L130 BoogieDeclarations]: Found specification of procedure close_candev [2021-11-25 17:53:50,085 INFO L138 BoogieDeclarations]: Found implementation of procedure close_candev [2021-11-25 17:53:50,085 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_irq [2021-11-25 17:53:50,086 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_irq [2021-11-25 17:53:50,086 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2021-11-25 17:53:50,086 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2021-11-25 17:53:50,086 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-25 17:53:50,086 INFO L130 BoogieDeclarations]: Found specification of procedure mcp251x_set_normal_mode [2021-11-25 17:53:50,087 INFO L138 BoogieDeclarations]: Found implementation of procedure mcp251x_set_normal_mode [2021-11-25 17:53:50,087 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-11-25 17:53:50,087 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-11-25 17:53:50,087 INFO L130 BoogieDeclarations]: Found specification of procedure mcp251x_can_remove [2021-11-25 17:53:50,087 INFO L138 BoogieDeclarations]: Found implementation of procedure mcp251x_can_remove [2021-11-25 17:53:50,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-25 17:53:50,088 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2021-11-25 17:53:50,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume [2021-11-25 17:53:50,088 INFO L130 BoogieDeclarations]: Found specification of procedure mcp251x_error_skb [2021-11-25 17:53:50,088 INFO L138 BoogieDeclarations]: Found implementation of procedure mcp251x_error_skb [2021-11-25 17:53:50,089 INFO L130 BoogieDeclarations]: Found specification of procedure mcp251x_hw_sleep [2021-11-25 17:53:50,089 INFO L138 BoogieDeclarations]: Found implementation of procedure mcp251x_hw_sleep [2021-11-25 17:53:50,089 INFO L130 BoogieDeclarations]: Found specification of procedure dma_free_attrs [2021-11-25 17:53:50,089 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_free_attrs [2021-11-25 17:53:50,089 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 17:53:50,090 INFO L130 BoogieDeclarations]: Found specification of procedure mcp251x_clean [2021-11-25 17:53:50,090 INFO L138 BoogieDeclarations]: Found implementation of procedure mcp251x_clean [2021-11-25 17:53:50,090 INFO L130 BoogieDeclarations]: Found specification of procedure regulator_disable [2021-11-25 17:53:50,090 INFO L138 BoogieDeclarations]: Found implementation of procedure regulator_disable [2021-11-25 17:53:50,090 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-25 17:53:50,091 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-25 17:53:50,091 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assert_linux_drivers_clk1__more_at_exit [2021-11-25 17:53:50,091 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assert_linux_drivers_clk1__more_at_exit [2021-11-25 17:53:50,091 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_set_drvdata [2021-11-25 17:53:50,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_set_drvdata [2021-11-25 17:53:50,092 INFO L130 BoogieDeclarations]: Found specification of procedure mcp251x_power_enable [2021-11-25 17:53:50,092 INFO L138 BoogieDeclarations]: Found implementation of procedure mcp251x_power_enable [2021-11-25 17:53:50,092 INFO L130 BoogieDeclarations]: Found specification of procedure mcp251x_can_suspend [2021-11-25 17:53:50,092 INFO L138 BoogieDeclarations]: Found implementation of procedure mcp251x_can_suspend [2021-11-25 17:53:50,092 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 17:53:50,093 INFO L130 BoogieDeclarations]: Found specification of procedure mcp251x_open [2021-11-25 17:53:50,093 INFO L138 BoogieDeclarations]: Found implementation of procedure mcp251x_open [2021-11-25 17:53:50,093 INFO L130 BoogieDeclarations]: Found specification of procedure mcp251x_can_probe [2021-11-25 17:53:50,093 INFO L138 BoogieDeclarations]: Found implementation of procedure mcp251x_can_probe [2021-11-25 17:53:50,093 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-25 17:53:50,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-25 17:53:50,094 INFO L130 BoogieDeclarations]: Found specification of procedure mcp251x_can_resume [2021-11-25 17:53:50,094 INFO L138 BoogieDeclarations]: Found implementation of procedure mcp251x_can_resume [2021-11-25 17:53:50,094 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 17:53:50,094 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_1 [2021-11-25 17:53:50,095 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_1 [2021-11-25 17:53:50,095 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_0 [2021-11-25 17:53:50,095 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_0 [2021-11-25 17:53:50,095 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_3 [2021-11-25 17:53:50,095 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_3 [2021-11-25 17:53:50,096 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_switch_4 [2021-11-25 17:53:50,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_switch_4 [2021-11-25 17:53:50,096 INFO L130 BoogieDeclarations]: Found specification of procedure mcp251x_hw_reset [2021-11-25 17:53:50,096 INFO L138 BoogieDeclarations]: Found implementation of procedure mcp251x_hw_reset [2021-11-25 17:53:50,096 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 17:53:50,097 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-25 17:53:50,097 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-25 17:53:50,097 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-25 17:53:50,097 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-25 17:53:50,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 17:53:50,098 INFO L130 BoogieDeclarations]: Found specification of procedure spi_message_init [2021-11-25 17:53:50,098 INFO L138 BoogieDeclarations]: Found implementation of procedure spi_message_init [2021-11-25 17:53:50,098 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-25 17:53:50,098 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-25 17:53:50,098 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-25 17:53:50,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-25 17:53:50,099 INFO L130 BoogieDeclarations]: Found specification of procedure spi_get_drvdata [2021-11-25 17:53:50,099 INFO L138 BoogieDeclarations]: Found implementation of procedure spi_get_drvdata [2021-11-25 17:53:50,099 INFO L130 BoogieDeclarations]: Found specification of procedure PTR_ERR [2021-11-25 17:53:50,099 INFO L138 BoogieDeclarations]: Found implementation of procedure PTR_ERR [2021-11-25 17:53:50,099 INFO L130 BoogieDeclarations]: Found specification of procedure mcp251x_setup [2021-11-25 17:53:50,100 INFO L138 BoogieDeclarations]: Found implementation of procedure mcp251x_setup [2021-11-25 17:53:50,100 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-25 17:53:50,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-25 17:53:50,100 INFO L130 BoogieDeclarations]: Found specification of procedure devm_kzalloc [2021-11-25 17:53:50,100 INFO L138 BoogieDeclarations]: Found implementation of procedure devm_kzalloc [2021-11-25 17:53:50,100 INFO L130 BoogieDeclarations]: Found specification of procedure __init_work [2021-11-25 17:53:50,101 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_work [2021-11-25 17:53:50,101 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-25 17:53:50,101 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-25 17:53:50,101 INFO L130 BoogieDeclarations]: Found specification of procedure mcp251x_hw_rx [2021-11-25 17:53:50,102 INFO L138 BoogieDeclarations]: Found implementation of procedure mcp251x_hw_rx [2021-11-25 17:53:50,102 INFO L130 BoogieDeclarations]: Found specification of procedure mcp251x_is_2510 [2021-11-25 17:53:50,102 INFO L138 BoogieDeclarations]: Found implementation of procedure mcp251x_is_2510 [2021-11-25 17:53:50,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 17:53:50,102 INFO L130 BoogieDeclarations]: Found specification of procedure free_candev [2021-11-25 17:53:50,102 INFO L138 BoogieDeclarations]: Found implementation of procedure free_candev [2021-11-25 17:53:50,103 INFO L130 BoogieDeclarations]: Found specification of procedure mcp251x_write_reg [2021-11-25 17:53:50,103 INFO L138 BoogieDeclarations]: Found implementation of procedure mcp251x_write_reg [2021-11-25 17:53:50,103 INFO L130 BoogieDeclarations]: Found specification of procedure queue_work [2021-11-25 17:53:50,103 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_work [2021-11-25 17:53:50,103 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2021-11-25 17:53:50,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2021-11-25 17:53:50,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 17:53:50,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 17:53:50,104 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-11-25 17:53:50,104 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-11-25 17:53:51,044 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 17:53:51,049 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 17:53:51,656 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-25 17:54:41,151 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2021-11-25 17:54:42,949 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 17:54:44,597 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 17:54:44,598 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 17:54:44,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:54:44 BoogieIcfgContainer [2021-11-25 17:54:44,605 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 17:54:44,609 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 17:54:44,610 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 17:54:44,614 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 17:54:44,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:53:45" (1/3) ... [2021-11-25 17:54:44,616 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57680cce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:54:44, skipping insertion in model container [2021-11-25 17:54:44,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:53:49" (2/3) ... [2021-11-25 17:54:44,617 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57680cce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:54:44, skipping insertion in model container [2021-11-25 17:54:44,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:54:44" (3/3) ... [2021-11-25 17:54:44,618 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-drivers-clk1_drivers-net-can-mcp251x.cil.i [2021-11-25 17:54:44,626 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 17:54:44,627 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 17:54:44,710 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 17:54:44,728 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 [2021-11-25 17:54:44,731 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 17:54:44,803 INFO L276 IsEmpty]: Start isEmpty. Operand has 1065 states, 640 states have (on average 1.328125) internal successors, (850), 660 states have internal predecessors, (850), 352 states have call successors, (352), 73 states have call predecessors, (352), 72 states have return successors, (343), 336 states have call predecessors, (343), 343 states have call successors, (343) [2021-11-25 17:54:44,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-25 17:54:44,838 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:54:44,839 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 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] [2021-11-25 17:54:44,840 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_assert_linux_drivers_clk1__more_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_drivers_clk1__more_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:54:44,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:54:44,847 INFO L85 PathProgramCache]: Analyzing trace with hash 665387139, now seen corresponding path program 1 times [2021-11-25 17:54:44,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:54:44,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353176835] [2021-11-25 17:54:44,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:54:44,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:54:45,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:54:46,320 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2021-11-25 17:54:46,321 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:54:46,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353176835] [2021-11-25 17:54:46,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353176835] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:54:46,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:54:46,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:54:46,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259715363] [2021-11-25 17:54:46,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:54:46,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:54:46,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:54:46,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:54:46,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:54:46,373 INFO L87 Difference]: Start difference. First operand has 1065 states, 640 states have (on average 1.328125) internal successors, (850), 660 states have internal predecessors, (850), 352 states have call successors, (352), 73 states have call predecessors, (352), 72 states have return successors, (343), 336 states have call predecessors, (343), 343 states have call successors, (343) Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-25 17:54:48,533 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:54:51,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:54:51,802 INFO L93 Difference]: Finished difference Result 3072 states and 4472 transitions. [2021-11-25 17:54:51,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:54:51,805 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 135 [2021-11-25 17:54:51,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:54:51,854 INFO L225 Difference]: With dead ends: 3072 [2021-11-25 17:54:51,854 INFO L226 Difference]: Without dead ends: 2017 [2021-11-25 17:54:51,870 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 [2021-11-25 17:54:51,875 INFO L933 BasicCegarLoop]: 1609 mSDtfsCounter, 1437 mSDsluCounter, 1487 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1437 SdHoareTripleChecker+Valid, 2868 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:54:51,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1437 Valid, 2868 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 502 Invalid, 1 Unknown, 0 Unchecked, 5.1s Time] [2021-11-25 17:54:51,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2017 states. [2021-11-25 17:54:52,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2017 to 2017. [2021-11-25 17:54:52,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2017 states, 1225 states have (on average 1.3208163265306123) internal successors, (1618), 1266 states have internal predecessors, (1618), 651 states have call successors, (651), 141 states have call predecessors, (651), 140 states have return successors, (647), 633 states have call predecessors, (647), 647 states have call successors, (647) [2021-11-25 17:54:52,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2017 states to 2017 states and 2916 transitions. [2021-11-25 17:54:52,145 INFO L78 Accepts]: Start accepts. Automaton has 2017 states and 2916 transitions. Word has length 135 [2021-11-25 17:54:52,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:54:52,146 INFO L470 AbstractCegarLoop]: Abstraction has 2017 states and 2916 transitions. [2021-11-25 17:54:52,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-25 17:54:52,147 INFO L276 IsEmpty]: Start isEmpty. Operand 2017 states and 2916 transitions. [2021-11-25 17:54:52,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-25 17:54:52,162 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:54:52,162 INFO L514 BasicCegarLoop]: trace histogram [15, 11, 11, 11, 11, 11, 11, 5, 5, 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] [2021-11-25 17:54:52,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 17:54:52,163 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_assert_linux_drivers_clk1__more_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_drivers_clk1__more_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:54:52,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:54:52,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1537557482, now seen corresponding path program 1 times [2021-11-25 17:54:52,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:54:52,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968573624] [2021-11-25 17:54:52,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:54:52,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:54:52,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:54:53,107 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2021-11-25 17:54:53,108 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:54:53,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968573624] [2021-11-25 17:54:53,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968573624] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:54:53,108 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:54:53,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 17:54:53,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454882416] [2021-11-25 17:54:53,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:54:53,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:54:53,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:54:53,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:54:53,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:54:53,112 INFO L87 Difference]: Start difference. First operand 2017 states and 2916 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-25 17:54:55,278 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:55:01,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:55:01,075 INFO L93 Difference]: Finished difference Result 4015 states and 5841 transitions. [2021-11-25 17:55:01,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 17:55:01,076 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 178 [2021-11-25 17:55:01,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:55:01,126 INFO L225 Difference]: With dead ends: 4015 [2021-11-25 17:55:01,126 INFO L226 Difference]: Without dead ends: 4011 [2021-11-25 17:55:01,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 17:55:01,132 INFO L933 BasicCegarLoop]: 1676 mSDtfsCounter, 1466 mSDsluCounter, 5351 mSDsCounter, 0 mSdLazyCounter, 1010 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1467 SdHoareTripleChecker+Valid, 6287 SdHoareTripleChecker+Invalid, 1014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1010 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2021-11-25 17:55:01,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1467 Valid, 6287 Invalid, 1014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1010 Invalid, 1 Unknown, 0 Unchecked, 7.6s Time] [2021-11-25 17:55:01,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4011 states. [2021-11-25 17:55:01,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4011 to 4007. [2021-11-25 17:55:01,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4007 states, 2435 states have (on average 1.3215605749486652) internal successors, (3218), 2518 states have internal predecessors, (3218), 1291 states have call successors, (1291), 283 states have call predecessors, (1291), 280 states have return successors, (1325), 1253 states have call predecessors, (1325), 1283 states have call successors, (1325) [2021-11-25 17:55:01,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4007 states to 4007 states and 5834 transitions. [2021-11-25 17:55:01,412 INFO L78 Accepts]: Start accepts. Automaton has 4007 states and 5834 transitions. Word has length 178 [2021-11-25 17:55:01,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:55:01,414 INFO L470 AbstractCegarLoop]: Abstraction has 4007 states and 5834 transitions. [2021-11-25 17:55:01,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-25 17:55:01,415 INFO L276 IsEmpty]: Start isEmpty. Operand 4007 states and 5834 transitions. [2021-11-25 17:55:01,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-25 17:55:01,427 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:55:01,427 INFO L514 BasicCegarLoop]: trace histogram [15, 11, 11, 11, 11, 11, 11, 5, 5, 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] [2021-11-25 17:55:01,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 17:55:01,428 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_assert_linux_drivers_clk1__more_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_drivers_clk1__more_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:55:01,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:55:01,429 INFO L85 PathProgramCache]: Analyzing trace with hash 707600207, now seen corresponding path program 1 times [2021-11-25 17:55:01,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:55:01,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121564600] [2021-11-25 17:55:01,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:55:01,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:55:01,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:55:02,163 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 575 trivial. 0 not checked. [2021-11-25 17:55:02,164 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:55:02,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121564600] [2021-11-25 17:55:02,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121564600] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:55:02,165 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:55:02,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 17:55:02,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101728119] [2021-11-25 17:55:02,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:55:02,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:55:02,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:55:02,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:55:02,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:55:02,168 INFO L87 Difference]: Start difference. First operand 4007 states and 5834 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-25 17:55:04,247 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 [] [2021-11-25 17:55:08,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:55:08,542 INFO L93 Difference]: Finished difference Result 4013 states and 5839 transitions. [2021-11-25 17:55:08,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 17:55:08,543 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 184 [2021-11-25 17:55:08,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:55:08,585 INFO L225 Difference]: With dead ends: 4013 [2021-11-25 17:55:08,586 INFO L226 Difference]: Without dead ends: 3984 [2021-11-25 17:55:08,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 17:55:08,592 INFO L933 BasicCegarLoop]: 1274 mSDtfsCounter, 1463 mSDsluCounter, 3015 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1463 SdHoareTripleChecker+Valid, 3813 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:55:08,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1463 Valid, 3813 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 723 Invalid, 1 Unknown, 0 Unchecked, 6.0s Time] [2021-11-25 17:55:08,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3984 states. [2021-11-25 17:55:08,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3984 to 3984. [2021-11-25 17:55:08,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3984 states, 2427 states have (on average 1.3209723939019364) internal successors, (3206), 2507 states have internal predecessors, (3206), 1279 states have call successors, (1279), 279 states have call predecessors, (1279), 277 states have return successors, (1317), 1245 states have call predecessors, (1317), 1275 states have call successors, (1317) [2021-11-25 17:55:08,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3984 states to 3984 states and 5802 transitions. [2021-11-25 17:55:08,831 INFO L78 Accepts]: Start accepts. Automaton has 3984 states and 5802 transitions. Word has length 184 [2021-11-25 17:55:08,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:55:08,832 INFO L470 AbstractCegarLoop]: Abstraction has 3984 states and 5802 transitions. [2021-11-25 17:55:08,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-25 17:55:08,833 INFO L276 IsEmpty]: Start isEmpty. Operand 3984 states and 5802 transitions. [2021-11-25 17:55:08,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2021-11-25 17:55:08,858 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:55:08,859 INFO L514 BasicCegarLoop]: trace histogram [19, 13, 13, 13, 13, 13, 13, 5, 5, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:55:08,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 17:55:08,859 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_assert_linux_drivers_clk1__more_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_drivers_clk1__more_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:55:08,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:55:08,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1313520947, now seen corresponding path program 1 times [2021-11-25 17:55:08,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:55:08,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614682498] [2021-11-25 17:55:08,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:55:08,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:55:09,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:55:09,478 INFO L134 CoverageAnalysis]: Checked inductivity of 856 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2021-11-25 17:55:09,478 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:55:09,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614682498] [2021-11-25 17:55:09,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614682498] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:55:09,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:55:09,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:55:09,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56911522] [2021-11-25 17:55:09,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:55:09,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:55:09,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:55:09,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:55:09,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:55:09,482 INFO L87 Difference]: Start difference. First operand 3984 states and 5802 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 3 states have call predecessors, (32), 3 states have call successors, (32) [2021-11-25 17:55:11,564 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 [] [2021-11-25 17:55:15,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:55:15,125 INFO L93 Difference]: Finished difference Result 11470 states and 16658 transitions. [2021-11-25 17:55:15,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:55:15,126 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 3 states have call predecessors, (32), 3 states have call successors, (32) Word has length 268 [2021-11-25 17:55:15,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:55:15,205 INFO L225 Difference]: With dead ends: 11470 [2021-11-25 17:55:15,205 INFO L226 Difference]: Without dead ends: 7509 [2021-11-25 17:55:15,232 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 [2021-11-25 17:55:15,236 INFO L933 BasicCegarLoop]: 1552 mSDtfsCounter, 1237 mSDsluCounter, 1422 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 29 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1237 SdHoareTripleChecker+Valid, 2768 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-11-25 17:55:15,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1237 Valid, 2768 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 562 Invalid, 1 Unknown, 0 Unchecked, 5.2s Time] [2021-11-25 17:55:15,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7509 states. [2021-11-25 17:55:15,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7509 to 7493. [2021-11-25 17:55:15,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7493 states, 4527 states have (on average 1.2999779103158824) internal successors, (5885), 4696 states have internal predecessors, (5885), 2415 states have call successors, (2415), 552 states have call predecessors, (2415), 550 states have return successors, (2463), 2340 states have call predecessors, (2463), 2411 states have call successors, (2463) [2021-11-25 17:55:15,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7493 states to 7493 states and 10763 transitions. [2021-11-25 17:55:15,764 INFO L78 Accepts]: Start accepts. Automaton has 7493 states and 10763 transitions. Word has length 268 [2021-11-25 17:55:15,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:55:15,765 INFO L470 AbstractCegarLoop]: Abstraction has 7493 states and 10763 transitions. [2021-11-25 17:55:15,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 3 states have call predecessors, (32), 3 states have call successors, (32) [2021-11-25 17:55:15,766 INFO L276 IsEmpty]: Start isEmpty. Operand 7493 states and 10763 transitions. [2021-11-25 17:55:15,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2021-11-25 17:55:15,816 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:55:15,816 INFO L514 BasicCegarLoop]: trace histogram [19, 13, 13, 13, 13, 13, 13, 7, 7, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:55:15,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 17:55:15,819 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_assert_linux_drivers_clk1__more_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_drivers_clk1__more_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:55:15,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:55:15,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1884191834, now seen corresponding path program 1 times [2021-11-25 17:55:15,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:55:15,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704767897] [2021-11-25 17:55:15,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:55:15,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:55:16,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:55:16,475 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2021-11-25 17:55:16,476 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:55:16,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704767897] [2021-11-25 17:55:16,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704767897] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:55:16,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:55:16,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:55:16,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370720763] [2021-11-25 17:55:16,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:55:16,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:55:16,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:55:16,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:55:16,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:55:16,480 INFO L87 Difference]: Start difference. First operand 7493 states and 10763 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 3 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-25 17:55:18,552 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 [] [2021-11-25 17:55:21,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:55:21,830 INFO L93 Difference]: Finished difference Result 16615 states and 23779 transitions. [2021-11-25 17:55:21,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:55:21,830 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 3 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) Word has length 284 [2021-11-25 17:55:21,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:55:21,924 INFO L225 Difference]: With dead ends: 16615 [2021-11-25 17:55:21,925 INFO L226 Difference]: Without dead ends: 9145 [2021-11-25 17:55:21,975 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 [2021-11-25 17:55:21,976 INFO L933 BasicCegarLoop]: 1682 mSDtfsCounter, 1354 mSDsluCounter, 1472 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1354 SdHoareTripleChecker+Valid, 2926 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:55:21,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1354 Valid, 2926 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 553 Invalid, 1 Unknown, 0 Unchecked, 5.0s Time] [2021-11-25 17:55:21,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9145 states. [2021-11-25 17:55:22,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9145 to 9129. [2021-11-25 17:55:22,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9129 states, 5505 states have (on average 1.2864668483197093) internal successors, (7082), 5723 states have internal predecessors, (7082), 2923 states have call successors, (2923), 702 states have call predecessors, (2923), 700 states have return successors, (2970), 2823 states have call predecessors, (2970), 2919 states have call successors, (2970) [2021-11-25 17:55:22,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9129 states to 9129 states and 12975 transitions. [2021-11-25 17:55:22,626 INFO L78 Accepts]: Start accepts. Automaton has 9129 states and 12975 transitions. Word has length 284 [2021-11-25 17:55:22,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:55:22,627 INFO L470 AbstractCegarLoop]: Abstraction has 9129 states and 12975 transitions. [2021-11-25 17:55:22,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 3 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-25 17:55:22,627 INFO L276 IsEmpty]: Start isEmpty. Operand 9129 states and 12975 transitions. [2021-11-25 17:55:22,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-11-25 17:55:22,665 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:55:22,665 INFO L514 BasicCegarLoop]: trace histogram [20, 13, 13, 13, 13, 13, 13, 7, 7, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:55:22,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 17:55:22,666 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_assert_linux_drivers_clk1__more_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_drivers_clk1__more_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:55:22,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:55:22,667 INFO L85 PathProgramCache]: Analyzing trace with hash 167962339, now seen corresponding path program 1 times [2021-11-25 17:55:22,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:55:22,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083143250] [2021-11-25 17:55:22,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:55:22,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:55:22,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:55:23,187 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2021-11-25 17:55:23,187 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:55:23,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083143250] [2021-11-25 17:55:23,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083143250] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:55:23,187 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:55:23,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:55:23,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434000430] [2021-11-25 17:55:23,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:55:23,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:55:23,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:55:23,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:55:23,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:55:23,190 INFO L87 Difference]: Start difference. First operand 9129 states and 12975 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) [2021-11-25 17:55:25,274 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 [] [2021-11-25 17:55:28,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:55:28,600 INFO L93 Difference]: Finished difference Result 25383 states and 36106 transitions. [2021-11-25 17:55:28,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:55:28,601 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) Word has length 265 [2021-11-25 17:55:28,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:55:28,717 INFO L225 Difference]: With dead ends: 25383 [2021-11-25 17:55:28,717 INFO L226 Difference]: Without dead ends: 16277 [2021-11-25 17:55:28,771 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 [2021-11-25 17:55:28,772 INFO L933 BasicCegarLoop]: 1662 mSDtfsCounter, 1389 mSDsluCounter, 1475 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1389 SdHoareTripleChecker+Valid, 2910 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-11-25 17:55:28,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1389 Valid, 2910 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 525 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2021-11-25 17:55:28,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16277 states. [2021-11-25 17:55:29,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16277 to 16259. [2021-11-25 17:55:29,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16259 states, 9851 states have (on average 1.2857577910871993) internal successors, (12666), 10257 states have internal predecessors, (12666), 5151 states have call successors, (5151), 1262 states have call predecessors, (5151), 1256 states have return successors, (5241), 4955 states have call predecessors, (5241), 5147 states have call successors, (5241) [2021-11-25 17:55:29,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16259 states to 16259 states and 23058 transitions. [2021-11-25 17:55:29,800 INFO L78 Accepts]: Start accepts. Automaton has 16259 states and 23058 transitions. Word has length 265 [2021-11-25 17:55:29,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:55:29,801 INFO L470 AbstractCegarLoop]: Abstraction has 16259 states and 23058 transitions. [2021-11-25 17:55:29,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) [2021-11-25 17:55:29,802 INFO L276 IsEmpty]: Start isEmpty. Operand 16259 states and 23058 transitions. [2021-11-25 17:55:29,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2021-11-25 17:55:29,865 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:55:29,866 INFO L514 BasicCegarLoop]: trace histogram [20, 13, 13, 13, 13, 13, 13, 8, 8, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:55:29,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 17:55:29,866 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_assert_linux_drivers_clk1__more_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_drivers_clk1__more_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:55:29,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:55:29,867 INFO L85 PathProgramCache]: Analyzing trace with hash -756765806, now seen corresponding path program 1 times [2021-11-25 17:55:29,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:55:29,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665224812] [2021-11-25 17:55:29,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:55:29,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:55:30,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:55:30,364 INFO L134 CoverageAnalysis]: Checked inductivity of 952 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 942 trivial. 0 not checked. [2021-11-25 17:55:30,364 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:55:30,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665224812] [2021-11-25 17:55:30,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665224812] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:55:30,365 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:55:30,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:55:30,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633918901] [2021-11-25 17:55:30,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:55:30,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:55:30,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:55:30,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:55:30,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:55:30,367 INFO L87 Difference]: Start difference. First operand 16259 states and 23058 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (36), 3 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-25 17:55:32,444 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 [] [2021-11-25 17:55:36,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:55:36,567 INFO L93 Difference]: Finished difference Result 38165 states and 54242 transitions. [2021-11-25 17:55:36,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:55:36,576 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (36), 3 states have call predecessors, (36), 3 states have call successors, (36) Word has length 270 [2021-11-25 17:55:36,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:55:36,704 INFO L225 Difference]: With dead ends: 38165 [2021-11-25 17:55:36,704 INFO L226 Difference]: Without dead ends: 23473 [2021-11-25 17:55:36,754 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 [2021-11-25 17:55:36,755 INFO L933 BasicCegarLoop]: 2269 mSDtfsCounter, 1404 mSDsluCounter, 1476 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1404 SdHoareTripleChecker+Valid, 3518 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-11-25 17:55:36,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1404 Valid, 3518 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 651 Invalid, 1 Unknown, 0 Unchecked, 5.4s Time] [2021-11-25 17:55:36,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23473 states. [2021-11-25 17:55:38,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23473 to 23455. [2021-11-25 17:55:38,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23455 states, 14223 states have (on average 1.2862265344863952) internal successors, (18294), 14817 states have internal predecessors, (18294), 7415 states have call successors, (7415), 1826 states have call predecessors, (7415), 1816 states have return successors, (7549), 7123 states have call predecessors, (7549), 7411 states have call successors, (7549) [2021-11-25 17:55:38,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23455 states to 23455 states and 33258 transitions. [2021-11-25 17:55:38,267 INFO L78 Accepts]: Start accepts. Automaton has 23455 states and 33258 transitions. Word has length 270 [2021-11-25 17:55:38,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:55:38,268 INFO L470 AbstractCegarLoop]: Abstraction has 23455 states and 33258 transitions. [2021-11-25 17:55:38,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (36), 3 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-25 17:55:38,269 INFO L276 IsEmpty]: Start isEmpty. Operand 23455 states and 33258 transitions. [2021-11-25 17:55:38,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2021-11-25 17:55:38,362 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:55:38,363 INFO L514 BasicCegarLoop]: trace histogram [20, 13, 13, 13, 13, 13, 13, 6, 6, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:55:38,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 17:55:38,365 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_assert_linux_drivers_clk1__more_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_drivers_clk1__more_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:55:38,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:55:38,366 INFO L85 PathProgramCache]: Analyzing trace with hash 146648034, now seen corresponding path program 1 times [2021-11-25 17:55:38,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:55:38,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603947536] [2021-11-25 17:55:38,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:55:38,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:55:38,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:55:38,871 INFO L134 CoverageAnalysis]: Checked inductivity of 914 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 906 trivial. 0 not checked. [2021-11-25 17:55:38,871 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:55:38,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603947536] [2021-11-25 17:55:38,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603947536] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:55:38,872 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:55:38,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:55:38,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3304551] [2021-11-25 17:55:38,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:55:38,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:55:38,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:55:38,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:55:38,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:55:38,874 INFO L87 Difference]: Start difference. First operand 23455 states and 33258 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 3 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (36), 3 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-25 17:55:40,947 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 [] [2021-11-25 17:55:45,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:55:45,354 INFO L93 Difference]: Finished difference Result 64471 states and 91240 transitions. [2021-11-25 17:55:45,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:55:45,355 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 3 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (36), 3 states have call predecessors, (36), 3 states have call successors, (36) Word has length 282 [2021-11-25 17:55:45,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:55:45,644 INFO L225 Difference]: With dead ends: 64471 [2021-11-25 17:55:45,644 INFO L226 Difference]: Without dead ends: 41039 [2021-11-25 17:55:45,757 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 [2021-11-25 17:55:45,758 INFO L933 BasicCegarLoop]: 1904 mSDtfsCounter, 1339 mSDsluCounter, 1462 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1339 SdHoareTripleChecker+Valid, 3147 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-11-25 17:55:45,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1339 Valid, 3147 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 559 Invalid, 1 Unknown, 0 Unchecked, 4.9s Time] [2021-11-25 17:55:45,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41039 states. [2021-11-25 17:55:48,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41039 to 40983. [2021-11-25 17:55:48,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40983 states, 24906 states have (on average 1.2782462057335582) internal successors, (31836), 26012 states have internal predecessors, (31836), 12811 states have call successors, (12811), 3283 states have call predecessors, (12811), 3265 states have return successors, (13064), 12218 states have call predecessors, (13064), 12807 states have call successors, (13064) [2021-11-25 17:55:48,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40983 states to 40983 states and 57711 transitions. [2021-11-25 17:55:48,628 INFO L78 Accepts]: Start accepts. Automaton has 40983 states and 57711 transitions. Word has length 282 [2021-11-25 17:55:48,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:55:48,629 INFO L470 AbstractCegarLoop]: Abstraction has 40983 states and 57711 transitions. [2021-11-25 17:55:48,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 3 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (36), 3 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-25 17:55:48,629 INFO L276 IsEmpty]: Start isEmpty. Operand 40983 states and 57711 transitions. [2021-11-25 17:55:48,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2021-11-25 17:55:48,756 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:55:48,756 INFO L514 BasicCegarLoop]: trace histogram [21, 13, 13, 13, 13, 13, 13, 7, 7, 5, 5, 5, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:55:48,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 17:55:48,758 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_assert_linux_drivers_clk1__more_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_drivers_clk1__more_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:55:48,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:55:48,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1286135543, now seen corresponding path program 1 times [2021-11-25 17:55:48,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:55:48,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458759258] [2021-11-25 17:55:48,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:55:48,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:55:49,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:55:49,635 INFO L134 CoverageAnalysis]: Checked inductivity of 999 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2021-11-25 17:55:49,635 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:55:49,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458759258] [2021-11-25 17:55:49,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458759258] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:55:49,636 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:55:49,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:55:49,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995802143] [2021-11-25 17:55:49,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:55:49,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:55:49,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:55:49,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:55:49,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:55:49,638 INFO L87 Difference]: Start difference. First operand 40983 states and 57711 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) [2021-11-25 17:55:51,714 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 [] [2021-11-25 17:55:58,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:55:58,041 INFO L93 Difference]: Finished difference Result 100571 states and 141761 transitions. [2021-11-25 17:55:58,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:55:58,042 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) Word has length 294 [2021-11-25 17:55:58,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:55:58,550 INFO L225 Difference]: With dead ends: 100571 [2021-11-25 17:55:58,550 INFO L226 Difference]: Without dead ends: 60035 [2021-11-25 17:55:58,740 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 [2021-11-25 17:55:58,744 INFO L933 BasicCegarLoop]: 2428 mSDtfsCounter, 1382 mSDsluCounter, 1470 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1382 SdHoareTripleChecker+Valid, 3670 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:55:58,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1382 Valid, 3670 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 736 Invalid, 1 Unknown, 0 Unchecked, 6.0s Time] [2021-11-25 17:55:58,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60035 states. [2021-11-25 17:56:01,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60035 to 59979. [2021-11-25 17:56:01,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59979 states, 36492 states have (on average 1.2770470240052614) internal successors, (46602), 38154 states have internal predecessors, (46602), 18697 states have call successors, (18697), 4815 states have call predecessors, (18697), 4789 states have return successors, (19065), 17800 states have call predecessors, (19065), 18693 states have call successors, (19065) [2021-11-25 17:56:02,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59979 states to 59979 states and 84364 transitions. [2021-11-25 17:56:02,180 INFO L78 Accepts]: Start accepts. Automaton has 59979 states and 84364 transitions. Word has length 294 [2021-11-25 17:56:02,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:56:02,182 INFO L470 AbstractCegarLoop]: Abstraction has 59979 states and 84364 transitions. [2021-11-25 17:56:02,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) [2021-11-25 17:56:02,183 INFO L276 IsEmpty]: Start isEmpty. Operand 59979 states and 84364 transitions. [2021-11-25 17:56:02,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2021-11-25 17:56:02,285 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:56:02,286 INFO L514 BasicCegarLoop]: trace histogram [21, 13, 13, 13, 13, 13, 13, 7, 7, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:56:02,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 17:56:02,286 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_assert_linux_drivers_clk1__more_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_drivers_clk1__more_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:56:02,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:56:02,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1666081791, now seen corresponding path program 1 times [2021-11-25 17:56:02,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:56:02,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480237568] [2021-11-25 17:56:02,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:56:02,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:56:02,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:56:03,278 INFO L134 CoverageAnalysis]: Checked inductivity of 988 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2021-11-25 17:56:03,278 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:56:03,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480237568] [2021-11-25 17:56:03,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480237568] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:56:03,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420946417] [2021-11-25 17:56:03,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:56:03,279 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:56:03,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11aef55-beb7-46e8-bd3a-35ddbf6f8999/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:56:03,284 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11aef55-beb7-46e8-bd3a-35ddbf6f8999/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:56:03,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11aef55-beb7-46e8-bd3a-35ddbf6f8999/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 17:56:05,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:56:05,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 4038 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 17:56:05,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:56:06,715 INFO L134 CoverageAnalysis]: Checked inductivity of 988 backedges. 380 proven. 0 refuted. 0 times theorem prover too weak. 608 trivial. 0 not checked. [2021-11-25 17:56:06,716 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:56:06,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420946417] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:56:06,716 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 17:56:06,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-25 17:56:06,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245144866] [2021-11-25 17:56:06,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:56:06,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:56:06,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:56:06,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:56:06,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:56:06,719 INFO L87 Difference]: Start difference. First operand 59979 states and 84364 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 3 states have call successors, (42), 3 states have call predecessors, (42), 3 states have return successors, (40), 3 states have call predecessors, (40), 3 states have call successors, (40) [2021-11-25 17:56:08,783 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:56:15,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:56:15,502 INFO L93 Difference]: Finished difference Result 147279 states and 207244 transitions. [2021-11-25 17:56:15,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:56:15,503 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 3 states have call successors, (42), 3 states have call predecessors, (42), 3 states have return successors, (40), 3 states have call predecessors, (40), 3 states have call successors, (40) Word has length 298 [2021-11-25 17:56:15,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:56:16,002 INFO L225 Difference]: With dead ends: 147279 [2021-11-25 17:56:16,002 INFO L226 Difference]: Without dead ends: 87747 [2021-11-25 17:56:16,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:56:16,184 INFO L933 BasicCegarLoop]: 1875 mSDtfsCounter, 1383 mSDsluCounter, 1450 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 17 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1383 SdHoareTripleChecker+Valid, 3106 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-11-25 17:56:16,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1383 Valid, 3106 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 556 Invalid, 1 Unknown, 0 Unchecked, 5.4s Time] [2021-11-25 17:56:16,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87747 states. [2021-11-25 17:56:20,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87747 to 87667. [2021-11-25 17:56:20,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87667 states, 53452 states have (on average 1.2769213499962584) internal successors, (68254), 55924 states have internal predecessors, (68254), 27151 states have call successors, (27151), 7101 states have call predecessors, (27151), 7063 states have return successors, (27693), 25784 states have call predecessors, (27693), 27147 states have call successors, (27693) [2021-11-25 17:56:20,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87667 states to 87667 states and 123098 transitions. [2021-11-25 17:56:20,704 INFO L78 Accepts]: Start accepts. Automaton has 87667 states and 123098 transitions. Word has length 298 [2021-11-25 17:56:20,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:56:20,706 INFO L470 AbstractCegarLoop]: Abstraction has 87667 states and 123098 transitions. [2021-11-25 17:56:20,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 3 states have call successors, (42), 3 states have call predecessors, (42), 3 states have return successors, (40), 3 states have call predecessors, (40), 3 states have call successors, (40) [2021-11-25 17:56:20,706 INFO L276 IsEmpty]: Start isEmpty. Operand 87667 states and 123098 transitions. [2021-11-25 17:56:20,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2021-11-25 17:56:20,830 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:56:20,831 INFO L514 BasicCegarLoop]: trace histogram [22, 13, 13, 13, 13, 13, 13, 10, 10, 4, 4, 4, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:56:20,880 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11aef55-beb7-46e8-bd3a-35ddbf6f8999/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-25 17:56:21,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11aef55-beb7-46e8-bd3a-35ddbf6f8999/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-25 17:56:21,059 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_assert_linux_drivers_clk1__more_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_drivers_clk1__more_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:56:21,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:56:21,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1182003321, now seen corresponding path program 1 times [2021-11-25 17:56:21,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:56:21,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187819301] [2021-11-25 17:56:21,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:56:21,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:56:21,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:56:22,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 1073 trivial. 0 not checked. [2021-11-25 17:56:22,023 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:56:22,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187819301] [2021-11-25 17:56:22,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187819301] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:56:22,023 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:56:22,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 17:56:22,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743774005] [2021-11-25 17:56:22,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:56:22,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:56:22,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:56:22,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:56:22,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:56:22,027 INFO L87 Difference]: Start difference. First operand 87667 states and 123098 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (40), 3 states have call predecessors, (40), 2 states have call successors, (40) [2021-11-25 17:56:24,101 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 [] [2021-11-25 17:56:32,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:56:32,380 INFO L93 Difference]: Finished difference Result 175473 states and 248535 transitions. [2021-11-25 17:56:32,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 17:56:32,381 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (40), 3 states have call predecessors, (40), 2 states have call successors, (40) Word has length 307 [2021-11-25 17:56:32,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:56:32,997 INFO L225 Difference]: With dead ends: 175473 [2021-11-25 17:56:32,997 INFO L226 Difference]: Without dead ends: 88253 [2021-11-25 17:56:33,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:56:33,247 INFO L933 BasicCegarLoop]: 1271 mSDtfsCounter, 2 mSDsluCounter, 4516 mSDsCounter, 0 mSdLazyCounter, 966 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 5076 SdHoareTripleChecker+Invalid, 967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 966 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:56:33,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 5076 Invalid, 967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 966 Invalid, 1 Unknown, 0 Unchecked, 7.1s Time] [2021-11-25 17:56:33,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88253 states. [2021-11-25 17:56:37,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88253 to 88127. [2021-11-25 17:56:37,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88127 states, 53774 states have (on average 1.275263138319634) internal successors, (68576), 56292 states have internal predecessors, (68576), 27151 states have call successors, (27151), 7101 states have call predecessors, (27151), 7201 states have return successors, (28408), 25876 states have call predecessors, (28408), 27147 states have call successors, (28408) [2021-11-25 17:56:37,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88127 states to 88127 states and 124135 transitions. [2021-11-25 17:56:37,720 INFO L78 Accepts]: Start accepts. Automaton has 88127 states and 124135 transitions. Word has length 307 [2021-11-25 17:56:37,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:56:37,721 INFO L470 AbstractCegarLoop]: Abstraction has 88127 states and 124135 transitions. [2021-11-25 17:56:37,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (40), 3 states have call predecessors, (40), 2 states have call successors, (40) [2021-11-25 17:56:37,721 INFO L276 IsEmpty]: Start isEmpty. Operand 88127 states and 124135 transitions. [2021-11-25 17:56:37,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2021-11-25 17:56:37,818 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:56:37,819 INFO L514 BasicCegarLoop]: trace histogram [22, 13, 13, 13, 13, 13, 12, 12, 12, 4, 4, 4, 4, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:56:37,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-25 17:56:37,819 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_assert_linux_drivers_clk1__more_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_assert_linux_drivers_clk1__more_at_exitErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:56:37,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:56:37,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1004216589, now seen corresponding path program 1 times [2021-11-25 17:56:37,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:56:37,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454479358] [2021-11-25 17:56:37,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:56:37,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:56:38,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:56:38,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1167 trivial. 0 not checked. [2021-11-25 17:56:38,399 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:56:38,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454479358] [2021-11-25 17:56:38,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454479358] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:56:38,399 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:56:38,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:56:38,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876359892] [2021-11-25 17:56:38,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:56:38,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:56:38,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:56:38,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:56:38,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:56:38,401 INFO L87 Difference]: Start difference. First operand 88127 states and 124135 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (43), 3 states have call predecessors, (43), 3 states have call successors, (43) [2021-11-25 17:56:40,460 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:56:49,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:56:49,134 INFO L93 Difference]: Finished difference Result 259542 states and 365666 transitions. [2021-11-25 17:56:49,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:56:49,134 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (43), 3 states have call predecessors, (43), 3 states have call successors, (43) Word has length 320 [2021-11-25 17:56:49,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:56:50,067 INFO L225 Difference]: With dead ends: 259542 [2021-11-25 17:56:50,067 INFO L226 Difference]: Without dead ends: 171862 [2021-11-25 17:56:50,626 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 [2021-11-25 17:56:50,627 INFO L933 BasicCegarLoop]: 2360 mSDtfsCounter, 1387 mSDsluCounter, 1476 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1387 SdHoareTripleChecker+Valid, 3604 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-11-25 17:56:50,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1387 Valid, 3604 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 702 Invalid, 1 Unknown, 0 Unchecked, 5.4s Time] [2021-11-25 17:56:50,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171862 states.