./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-net-can-usb-ems_usb.ko.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8614fea-07af-4b5f-a1c2-5f8b7516d13f/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8614fea-07af-4b5f-a1c2-5f8b7516d13f/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8614fea-07af-4b5f-a1c2-5f8b7516d13f/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8614fea-07af-4b5f-a1c2-5f8b7516d13f/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-net-can-usb-ems_usb.ko.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8614fea-07af-4b5f-a1c2-5f8b7516d13f/bin/utaipan-g80aRyZoba/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8614fea-07af-4b5f-a1c2-5f8b7516d13f/bin/utaipan-g80aRyZoba --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 01d4ebb86f2bde0df0d47bbd5d9b632b620f2501e68770553e85fb2bb5a7d15a --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-22 01:50:26,835 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:50:26,837 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:50:26,857 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:50:26,857 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:50:26,859 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:50:26,860 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:50:26,862 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:50:26,864 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:50:26,866 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:50:26,867 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:50:26,868 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:50:26,869 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:50:26,870 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:50:26,872 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:50:26,873 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:50:26,874 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:50:26,876 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:50:26,878 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:50:26,880 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:50:26,882 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:50:26,883 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:50:26,885 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:50:26,886 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:50:26,890 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:50:26,890 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:50:26,891 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:50:26,892 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:50:26,893 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:50:26,894 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:50:26,895 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:50:26,896 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:50:26,897 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:50:26,898 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:50:26,899 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:50:26,899 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:50:26,900 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:50:26,901 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:50:26,901 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:50:26,903 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:50:26,904 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:50:26,905 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8614fea-07af-4b5f-a1c2-5f8b7516d13f/bin/utaipan-g80aRyZoba/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-22 01:50:26,932 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:50:26,938 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:50:26,939 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:50:26,939 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:50:26,940 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:50:26,940 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:50:26,941 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:50:26,941 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:50:26,942 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:50:26,943 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 01:50:26,944 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:50:26,945 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:50:26,945 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 01:50:26,945 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 01:50:26,946 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:50:26,946 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 01:50:26,946 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 01:50:26,947 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 01:50:26,948 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:50:26,949 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:50:26,949 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:50:26,949 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 01:50:26,950 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:50:26,950 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 01:50:26,950 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 01:50:26,951 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:50:26,952 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 01:50:26,952 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:50:26,953 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:50:26,953 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:50:26,953 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:50:26,954 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 01:50:26,954 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:50:26,955 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 01:50:26,955 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 01:50:26,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 01:50:26,966 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 01:50:26,967 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:50:26,968 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8614fea-07af-4b5f-a1c2-5f8b7516d13f/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8614fea-07af-4b5f-a1c2-5f8b7516d13f/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 01d4ebb86f2bde0df0d47bbd5d9b632b620f2501e68770553e85fb2bb5a7d15a [2022-11-22 01:50:27,317 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:50:27,359 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:50:27,362 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:50:27,363 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:50:27,364 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:50:27,365 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8614fea-07af-4b5f-a1c2-5f8b7516d13f/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-net-can-usb-ems_usb.ko.cil.out.i [2022-11-22 01:50:30,882 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:50:31,481 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:50:31,482 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8614fea-07af-4b5f-a1c2-5f8b7516d13f/sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-net-can-usb-ems_usb.ko.cil.out.i [2022-11-22 01:50:31,523 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8614fea-07af-4b5f-a1c2-5f8b7516d13f/bin/utaipan-g80aRyZoba/data/278417923/c9f30ae357014a6cb13a2971282bc6c1/FLAG0d12d0479 [2022-11-22 01:50:31,543 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8614fea-07af-4b5f-a1c2-5f8b7516d13f/bin/utaipan-g80aRyZoba/data/278417923/c9f30ae357014a6cb13a2971282bc6c1 [2022-11-22 01:50:31,549 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:50:31,550 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:50:31,556 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:50:31,556 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:50:31,561 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:50:31,562 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:50:31" (1/1) ... [2022-11-22 01:50:31,565 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2771fe7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:50:31, skipping insertion in model container [2022-11-22 01:50:31,565 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:50:31" (1/1) ... [2022-11-22 01:50:31,573 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:50:31,731 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:50:32,986 WARN L237 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_c8614fea-07af-4b5f-a1c2-5f8b7516d13f/sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-net-can-usb-ems_usb.ko.cil.out.i[191320,191333] [2022-11-22 01:50:33,033 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:50:33,078 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 01:50:33,450 WARN L237 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_c8614fea-07af-4b5f-a1c2-5f8b7516d13f/sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-net-can-usb-ems_usb.ko.cil.out.i[191320,191333] [2022-11-22 01:50:33,472 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:50:33,712 INFO L208 MainTranslator]: Completed translation [2022-11-22 01:50:33,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:50:33 WrapperNode [2022-11-22 01:50:33,713 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:50:33,714 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 01:50:33,714 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 01:50:33,714 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 01:50:33,723 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:50:33" (1/1) ... [2022-11-22 01:50:33,805 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:50:33" (1/1) ... [2022-11-22 01:50:33,919 INFO L138 Inliner]: procedures = 133, calls = 749, calls flagged for inlining = 54, calls inlined = 44, statements flattened = 1391 [2022-11-22 01:50:33,925 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 01:50:33,926 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 01:50:33,926 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 01:50:33,927 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 01:50:33,940 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:50:33" (1/1) ... [2022-11-22 01:50:33,940 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:50:33" (1/1) ... [2022-11-22 01:50:33,950 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:50:33" (1/1) ... [2022-11-22 01:50:33,951 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:50:33" (1/1) ... [2022-11-22 01:50:34,001 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:50:33" (1/1) ... [2022-11-22 01:50:34,011 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:50:33" (1/1) ... [2022-11-22 01:50:34,019 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:50:33" (1/1) ... [2022-11-22 01:50:34,025 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:50:33" (1/1) ... [2022-11-22 01:50:34,037 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 01:50:34,038 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 01:50:34,038 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 01:50:34,038 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 01:50:34,039 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:50:33" (1/1) ... [2022-11-22 01:50:34,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:50:34,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8614fea-07af-4b5f-a1c2-5f8b7516d13f/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:50:34,072 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8614fea-07af-4b5f-a1c2-5f8b7516d13f/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 01:50:34,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8614fea-07af-4b5f-a1c2-5f8b7516d13f/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 01:50:34,146 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2022-11-22 01:50:34,148 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2022-11-22 01:50:34,148 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_init [2022-11-22 01:50:34,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_init [2022-11-22 01:50:34,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-22 01:50:34,150 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2022-11-22 01:50:34,150 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2022-11-22 01:50:34,150 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-22 01:50:34,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-22 01:50:34,150 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-22 01:50:34,151 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2022-11-22 01:50:34,151 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2022-11-22 01:50:34,151 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_control_cmd [2022-11-22 01:50:34,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_control_cmd [2022-11-22 01:50:34,151 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-11-22 01:50:34,151 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-11-22 01:50:34,151 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-22 01:50:34,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-22 01:50:34,152 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_exit [2022-11-22 01:50:34,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_exit [2022-11-22 01:50:34,152 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_anchored_urbs [2022-11-22 01:50:34,152 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_anchored_urbs [2022-11-22 01:50:34,152 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-22 01:50:34,153 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-22 01:50:34,153 INFO L130 BoogieDeclarations]: Found specification of procedure init_usb_anchor [2022-11-22 01:50:34,154 INFO L138 BoogieDeclarations]: Found implementation of procedure init_usb_anchor [2022-11-22 01:50:34,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-22 01:50:34,155 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_bulk_urb [2022-11-22 01:50:34,155 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_bulk_urb [2022-11-22 01:50:34,156 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume_stop [2022-11-22 01:50:34,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume_stop [2022-11-22 01:50:34,156 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value [2022-11-22 01:50:34,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value [2022-11-22 01:50:34,156 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2022-11-22 01:50:34,157 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2022-11-22 01:50:34,157 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_command_msg [2022-11-22 01:50:34,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_command_msg [2022-11-22 01:50:34,157 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-22 01:50:34,157 INFO L130 BoogieDeclarations]: Found specification of procedure unlink_all_urbs [2022-11-22 01:50:34,158 INFO L138 BoogieDeclarations]: Found implementation of procedure unlink_all_urbs [2022-11-22 01:50:34,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 01:50:34,158 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2022-11-22 01:50:34,158 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2022-11-22 01:50:34,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 01:50:34,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-22 01:50:34,159 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_write_mode [2022-11-22 01:50:34,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_write_mode [2022-11-22 01:50:34,159 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2022-11-22 01:50:34,159 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2022-11-22 01:50:34,160 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_coherent [2022-11-22 01:50:34,161 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_coherent [2022-11-22 01:50:34,161 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-22 01:50:34,162 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec [2022-11-22 01:50:34,162 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec [2022-11-22 01:50:34,162 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2022-11-22 01:50:34,162 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2022-11-22 01:50:34,163 INFO L130 BoogieDeclarations]: Found specification of procedure usb_anchor_urb [2022-11-22 01:50:34,163 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_anchor_urb [2022-11-22 01:50:34,163 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_blast_assert [2022-11-22 01:50:34,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_blast_assert [2022-11-22 01:50:34,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 01:50:34,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-22 01:50:34,164 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2022-11-22 01:50:34,164 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2022-11-22 01:50:34,165 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_detach [2022-11-22 01:50:34,165 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_detach [2022-11-22 01:50:34,165 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2022-11-22 01:50:34,165 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2022-11-22 01:50:34,165 INFO L130 BoogieDeclarations]: Found specification of procedure usb_unanchor_urb [2022-11-22 01:50:34,166 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_unanchor_urb [2022-11-22 01:50:34,166 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2022-11-22 01:50:34,166 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2022-11-22 01:50:34,166 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-11-22 01:50:34,167 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-11-22 01:50:34,167 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undefined_pointer [2022-11-22 01:50:34,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undefined_pointer [2022-11-22 01:50:34,168 INFO L130 BoogieDeclarations]: Found specification of procedure close_candev [2022-11-22 01:50:34,168 INFO L138 BoogieDeclarations]: Found implementation of procedure close_candev [2022-11-22 01:50:34,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 01:50:34,169 INFO L130 BoogieDeclarations]: Found specification of procedure free_candev [2022-11-22 01:50:34,169 INFO L138 BoogieDeclarations]: Found implementation of procedure free_candev [2022-11-22 01:50:34,169 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2022-11-22 01:50:34,170 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2022-11-22 01:50:34,170 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-22 01:50:34,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 01:50:34,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 01:50:34,774 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 01:50:34,776 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 01:50:35,328 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_assume_stopFINAL: assume true; [2022-11-22 01:50:35,582 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-22 01:50:38,282 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##28: assume !false; [2022-11-22 01:50:38,282 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##27: assume false; [2022-11-22 01:50:38,336 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 01:50:38,708 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 01:50:38,708 INFO L300 CfgBuilder]: Removed 13 assume(true) statements. [2022-11-22 01:50:38,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:50:38 BoogieIcfgContainer [2022-11-22 01:50:38,714 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 01:50:38,718 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 01:50:38,719 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 01:50:38,723 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 01:50:38,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:50:31" (1/3) ... [2022-11-22 01:50:38,724 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d59658b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:50:38, skipping insertion in model container [2022-11-22 01:50:38,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:50:33" (2/3) ... [2022-11-22 01:50:38,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d59658b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:50:38, skipping insertion in model container [2022-11-22 01:50:38,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:50:38" (3/3) ... [2022-11-22 01:50:38,726 INFO L112 eAbstractionObserver]: Analyzing ICFG usb_urb-drivers-net-can-usb-ems_usb.ko.cil.out.i [2022-11-22 01:50:38,748 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 01:50:38,748 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 01:50:38,836 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 01:50:38,845 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7a39df98, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 01:50:38,846 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 01:50:38,855 INFO L276 IsEmpty]: Start isEmpty. Operand has 327 states, 200 states have (on average 1.38) internal successors, (276), 212 states have internal predecessors, (276), 91 states have call successors, (91), 35 states have call predecessors, (91), 34 states have return successors, (89), 87 states have call predecessors, (89), 89 states have call successors, (89) [2022-11-22 01:50:38,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-22 01:50:38,865 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:50:38,866 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:50:38,866 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:50:38,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:50:38,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1750355893, now seen corresponding path program 1 times [2022-11-22 01:50:38,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:50:38,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649983107] [2022-11-22 01:50:38,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:50:38,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:50:39,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:50:39,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:50:39,480 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:50:39,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649983107] [2022-11-22 01:50:39,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649983107] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:50:39,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:50:39,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:50:39,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994008865] [2022-11-22 01:50:39,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:50:39,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:50:39,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:50:39,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:50:39,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:50:39,528 INFO L87 Difference]: Start difference. First operand has 327 states, 200 states have (on average 1.38) internal successors, (276), 212 states have internal predecessors, (276), 91 states have call successors, (91), 35 states have call predecessors, (91), 34 states have return successors, (89), 87 states have call predecessors, (89), 89 states have call successors, (89) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:50:44,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:50:44,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:50:44,200 INFO L93 Difference]: Finished difference Result 836 states and 1187 transitions. [2022-11-22 01:50:44,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:50:44,203 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-11-22 01:50:44,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:50:44,222 INFO L225 Difference]: With dead ends: 836 [2022-11-22 01:50:44,222 INFO L226 Difference]: Without dead ends: 508 [2022-11-22 01:50:44,232 INFO L412 NwaCegarLoop]: 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 [2022-11-22 01:50:44,238 INFO L413 NwaCegarLoop]: 439 mSDtfsCounter, 252 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 810 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:50:44,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 810 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-11-22 01:50:44,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2022-11-22 01:50:44,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 504. [2022-11-22 01:50:44,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 311 states have (on average 1.3183279742765273) internal successors, (410), 322 states have internal predecessors, (410), 136 states have call successors, (136), 58 states have call predecessors, (136), 56 states have return successors, (132), 126 states have call predecessors, (132), 132 states have call successors, (132) [2022-11-22 01:50:44,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 678 transitions. [2022-11-22 01:50:44,374 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 678 transitions. Word has length 10 [2022-11-22 01:50:44,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:50:44,375 INFO L495 AbstractCegarLoop]: Abstraction has 504 states and 678 transitions. [2022-11-22 01:50:44,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:50:44,375 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 678 transitions. [2022-11-22 01:50:44,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-22 01:50:44,376 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:50:44,376 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:50:44,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 01:50:44,377 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:50:44,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:50:44,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1573313863, now seen corresponding path program 1 times [2022-11-22 01:50:44,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:50:44,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869296281] [2022-11-22 01:50:44,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:50:44,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:50:44,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:50:44,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:50:44,534 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:50:44,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869296281] [2022-11-22 01:50:44,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869296281] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:50:44,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:50:44,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:50:44,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940017990] [2022-11-22 01:50:44,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:50:44,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:50:44,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:50:44,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:50:44,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:50:44,538 INFO L87 Difference]: Start difference. First operand 504 states and 678 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:50:47,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:50:49,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:50:49,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:50:49,494 INFO L93 Difference]: Finished difference Result 742 states and 994 transitions. [2022-11-22 01:50:49,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:50:49,495 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-11-22 01:50:49,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:50:49,502 INFO L225 Difference]: With dead ends: 742 [2022-11-22 01:50:49,502 INFO L226 Difference]: Without dead ends: 733 [2022-11-22 01:50:49,503 INFO L412 NwaCegarLoop]: 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 [2022-11-22 01:50:49,504 INFO L413 NwaCegarLoop]: 451 mSDtfsCounter, 311 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 819 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-22 01:50:49,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 819 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-11-22 01:50:49,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2022-11-22 01:50:49,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 728. [2022-11-22 01:50:49,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 728 states, 451 states have (on average 1.3082039911308203) internal successors, (590), 463 states have internal predecessors, (590), 195 states have call successors, (195), 84 states have call predecessors, (195), 81 states have return successors, (191), 182 states have call predecessors, (191), 191 states have call successors, (191) [2022-11-22 01:50:49,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 976 transitions. [2022-11-22 01:50:49,593 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 976 transitions. Word has length 11 [2022-11-22 01:50:49,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:50:49,594 INFO L495 AbstractCegarLoop]: Abstraction has 728 states and 976 transitions. [2022-11-22 01:50:49,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:50:49,594 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 976 transitions. [2022-11-22 01:50:49,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-22 01:50:49,599 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:50:49,599 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:50:49,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 01:50:49,600 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:50:49,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:50:49,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1402781733, now seen corresponding path program 1 times [2022-11-22 01:50:49,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:50:49,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785242166] [2022-11-22 01:50:49,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:50:49,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:50:49,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:50:49,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:50:49,957 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:50:49,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785242166] [2022-11-22 01:50:49,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785242166] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:50:49,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:50:49,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:50:49,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249166846] [2022-11-22 01:50:49,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:50:49,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:50:49,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:50:49,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:50:49,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:50:49,966 INFO L87 Difference]: Start difference. First operand 728 states and 976 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-22 01:50:53,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:50:53,288 INFO L93 Difference]: Finished difference Result 1772 states and 2471 transitions. [2022-11-22 01:50:53,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:50:53,289 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2022-11-22 01:50:53,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:50:53,297 INFO L225 Difference]: With dead ends: 1772 [2022-11-22 01:50:53,298 INFO L226 Difference]: Without dead ends: 1049 [2022-11-22 01:50:53,301 INFO L412 NwaCegarLoop]: 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 [2022-11-22 01:50:53,303 INFO L413 NwaCegarLoop]: 430 mSDtfsCounter, 164 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 757 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:50:53,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 757 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-22 01:50:53,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1049 states. [2022-11-22 01:50:53,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1049 to 1040. [2022-11-22 01:50:53,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 661 states have (on average 1.3449319213313162) internal successors, (889), 681 states have internal predecessors, (889), 297 states have call successors, (297), 84 states have call predecessors, (297), 81 states have return successors, (293), 278 states have call predecessors, (293), 293 states have call successors, (293) [2022-11-22 01:50:53,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 1479 transitions. [2022-11-22 01:50:53,379 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 1479 transitions. Word has length 52 [2022-11-22 01:50:53,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:50:53,379 INFO L495 AbstractCegarLoop]: Abstraction has 1040 states and 1479 transitions. [2022-11-22 01:50:53,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-22 01:50:53,380 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 1479 transitions. [2022-11-22 01:50:53,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-22 01:50:53,383 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:50:53,383 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:50:53,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 01:50:53,384 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:50:53,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:50:53,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1235726526, now seen corresponding path program 1 times [2022-11-22 01:50:53,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:50:53,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308305660] [2022-11-22 01:50:53,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:50:53,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:50:53,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:50:54,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:50:54,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:50:54,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308305660] [2022-11-22 01:50:54,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308305660] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:50:54,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:50:54,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-22 01:50:54,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041572140] [2022-11-22 01:50:54,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:50:54,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-22 01:50:54,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:50:54,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-22 01:50:54,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-11-22 01:50:54,936 INFO L87 Difference]: Start difference. First operand 1040 states and 1479 transitions. Second operand has 11 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-22 01:50:57,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:51:11,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:51:14,482 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:51:18,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:51:21,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:51:21,422 INFO L93 Difference]: Finished difference Result 2364 states and 3436 transitions. [2022-11-22 01:51:21,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-22 01:51:21,423 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 47 [2022-11-22 01:51:21,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:51:21,433 INFO L225 Difference]: With dead ends: 2364 [2022-11-22 01:51:21,433 INFO L226 Difference]: Without dead ends: 1580 [2022-11-22 01:51:21,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2022-11-22 01:51:21,437 INFO L413 NwaCegarLoop]: 446 mSDtfsCounter, 493 mSDsluCounter, 2690 mSDsCounter, 0 mSdLazyCounter, 2400 mSolverCounterSat, 99 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 3136 SdHoareTripleChecker+Invalid, 2500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 2400 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:51:21,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [556 Valid, 3136 Invalid, 2500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 2400 Invalid, 1 Unknown, 0 Unchecked, 26.1s Time] [2022-11-22 01:51:21,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1580 states. [2022-11-22 01:51:21,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1580 to 1050. [2022-11-22 01:51:21,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 668 states have (on average 1.344311377245509) internal successors, (898), 686 states have internal predecessors, (898), 299 states have call successors, (299), 85 states have call predecessors, (299), 82 states have return successors, (295), 282 states have call predecessors, (295), 295 states have call successors, (295) [2022-11-22 01:51:21,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 1492 transitions. [2022-11-22 01:51:21,519 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 1492 transitions. Word has length 47 [2022-11-22 01:51:21,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:51:21,520 INFO L495 AbstractCegarLoop]: Abstraction has 1050 states and 1492 transitions. [2022-11-22 01:51:21,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-22 01:51:21,520 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 1492 transitions. [2022-11-22 01:51:21,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-22 01:51:21,523 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:51:21,523 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 01:51:21,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 01:51:21,524 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:51:21,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:51:21,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1390502159, now seen corresponding path program 1 times [2022-11-22 01:51:21,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:51:21,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218221686] [2022-11-22 01:51:21,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:51:21,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:51:21,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:51:22,324 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 01:51:22,324 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:51:22,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218221686] [2022-11-22 01:51:22,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218221686] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:51:22,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:51:22,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-22 01:51:22,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108116709] [2022-11-22 01:51:22,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:51:22,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 01:51:22,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:51:22,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 01:51:22,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:51:22,327 INFO L87 Difference]: Start difference. First operand 1050 states and 1492 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 5 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-22 01:51:24,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:51:25,982 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:51:32,990 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:51:38,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:51:46,369 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:51:48,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:51:52,667 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:51:52,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:51:52,827 INFO L93 Difference]: Finished difference Result 2328 states and 3431 transitions. [2022-11-22 01:51:52,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-22 01:51:52,828 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 5 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 53 [2022-11-22 01:51:52,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:51:52,841 INFO L225 Difference]: With dead ends: 2328 [2022-11-22 01:51:52,841 INFO L226 Difference]: Without dead ends: 2323 [2022-11-22 01:51:52,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-22 01:51:52,844 INFO L413 NwaCegarLoop]: 724 mSDtfsCounter, 1143 mSDsluCounter, 1601 mSDsCounter, 0 mSdLazyCounter, 2212 mSolverCounterSat, 488 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1249 SdHoareTripleChecker+Valid, 2325 SdHoareTripleChecker+Invalid, 2702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 488 IncrementalHoareTripleChecker+Valid, 2212 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:51:52,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1249 Valid, 2325 Invalid, 2702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [488 Valid, 2212 Invalid, 2 Unknown, 0 Unchecked, 30.2s Time] [2022-11-22 01:51:52,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2323 states. [2022-11-22 01:51:52,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2323 to 1769. [2022-11-22 01:51:52,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1769 states, 1123 states have (on average 1.3437221727515583) internal successors, (1509), 1155 states have internal predecessors, (1509), 507 states have call successors, (507), 142 states have call predecessors, (507), 138 states have return successors, (523), 479 states have call predecessors, (523), 503 states have call successors, (523) [2022-11-22 01:51:53,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1769 states to 1769 states and 2539 transitions. [2022-11-22 01:51:53,008 INFO L78 Accepts]: Start accepts. Automaton has 1769 states and 2539 transitions. Word has length 53 [2022-11-22 01:51:53,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:51:53,010 INFO L495 AbstractCegarLoop]: Abstraction has 1769 states and 2539 transitions. [2022-11-22 01:51:53,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 5 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-22 01:51:53,010 INFO L276 IsEmpty]: Start isEmpty. Operand 1769 states and 2539 transitions. [2022-11-22 01:51:53,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-22 01:51:53,015 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:51:53,015 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 01:51:53,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 01:51:53,015 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:51:53,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:51:53,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1172846488, now seen corresponding path program 1 times [2022-11-22 01:51:53,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:51:53,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606751011] [2022-11-22 01:51:53,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:51:53,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:51:53,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:51:53,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:51:53,315 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:51:53,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606751011] [2022-11-22 01:51:53,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606751011] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:51:53,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:51:53,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:51:53,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118992827] [2022-11-22 01:51:53,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:51:53,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:51:53,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:51:53,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:51:53,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:51:53,325 INFO L87 Difference]: Start difference. First operand 1769 states and 2539 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-22 01:51:55,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:51:58,258 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:51:58,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:51:58,290 INFO L93 Difference]: Finished difference Result 3025 states and 4359 transitions. [2022-11-22 01:51:58,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:51:58,290 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 65 [2022-11-22 01:51:58,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:51:58,300 INFO L225 Difference]: With dead ends: 3025 [2022-11-22 01:51:58,301 INFO L226 Difference]: Without dead ends: 1779 [2022-11-22 01:51:58,305 INFO L412 NwaCegarLoop]: 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 [2022-11-22 01:51:58,306 INFO L413 NwaCegarLoop]: 374 mSDtfsCounter, 0 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 745 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-22 01:51:58,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 745 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-11-22 01:51:58,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1779 states. [2022-11-22 01:51:58,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1779 to 1779. [2022-11-22 01:51:58,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1779 states, 1133 states have (on average 1.3406884377758164) internal successors, (1519), 1165 states have internal predecessors, (1519), 507 states have call successors, (507), 142 states have call predecessors, (507), 138 states have return successors, (523), 479 states have call predecessors, (523), 503 states have call successors, (523) [2022-11-22 01:51:58,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1779 states to 1779 states and 2549 transitions. [2022-11-22 01:51:58,488 INFO L78 Accepts]: Start accepts. Automaton has 1779 states and 2549 transitions. Word has length 65 [2022-11-22 01:51:58,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:51:58,489 INFO L495 AbstractCegarLoop]: Abstraction has 1779 states and 2549 transitions. [2022-11-22 01:51:58,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-22 01:51:58,489 INFO L276 IsEmpty]: Start isEmpty. Operand 1779 states and 2549 transitions. [2022-11-22 01:51:58,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-22 01:51:58,495 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:51:58,495 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:51:58,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 01:51:58,496 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:51:58,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:51:58,499 INFO L85 PathProgramCache]: Analyzing trace with hash -178206725, now seen corresponding path program 1 times [2022-11-22 01:51:58,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:51:58,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244802202] [2022-11-22 01:51:58,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:51:58,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:51:58,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:51:58,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:51:58,789 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:51:58,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244802202] [2022-11-22 01:51:58,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244802202] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:51:58,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645793454] [2022-11-22 01:51:58,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:51:58,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:51:58,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8614fea-07af-4b5f-a1c2-5f8b7516d13f/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:51:58,798 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8614fea-07af-4b5f-a1c2-5f8b7516d13f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:51:58,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8614fea-07af-4b5f-a1c2-5f8b7516d13f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 01:51:59,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:51:59,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 1549 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 01:51:59,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:51:59,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:51:59,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:51:59,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 01:51:59,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645793454] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:51:59,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [490375049] [2022-11-22 01:51:59,648 INFO L159 IcfgInterpreter]: Started Sifa with 62 locations of interest [2022-11-22 01:51:59,648 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:51:59,653 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:51:59,659 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:51:59,660 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:52:00,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 196 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 76 [2022-11-22 01:52:01,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2866 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 213 treesize of output 351 [2022-11-22 01:52:01,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1308 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 231 [2022-11-22 01:52:22,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-22 01:52:22,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 01:53:38,291 INFO L321 Elim1Store]: treesize reduction 97, result has 21.1 percent of original size [2022-11-22 01:53:38,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 48 [2022-11-22 01:53:38,735 INFO L321 Elim1Store]: treesize reduction 55, result has 25.7 percent of original size [2022-11-22 01:53:38,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 64 [2022-11-22 01:53:38,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:38,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:38,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:38,906 INFO L321 Elim1Store]: treesize reduction 169, result has 21.4 percent of original size [2022-11-22 01:53:38,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 16 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 111 [2022-11-22 01:53:39,388 INFO L321 Elim1Store]: treesize reduction 344, result has 39.5 percent of original size [2022-11-22 01:53:39,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 116 treesize of output 289 [2022-11-22 01:53:40,240 INFO L321 Elim1Store]: treesize reduction 208, result has 42.4 percent of original size [2022-11-22 01:53:40,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 29 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 8 case distinctions, treesize of input 109 treesize of output 153 [2022-11-22 01:53:40,700 INFO L321 Elim1Store]: treesize reduction 232, result has 53.3 percent of original size [2022-11-22 01:53:40,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 28 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 16 case distinctions, treesize of input 187 treesize of output 387 [2022-11-22 01:53:41,221 INFO L217 Elim1Store]: Index analysis took 142 ms [2022-11-22 01:53:42,878 INFO L321 Elim1Store]: treesize reduction 88, result has 28.5 percent of original size [2022-11-22 01:53:42,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 57 [2022-11-22 01:53:43,538 INFO L321 Elim1Store]: treesize reduction 55, result has 25.7 percent of original size [2022-11-22 01:53:43,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 73 [2022-11-22 01:53:43,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:43,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:43,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:43,838 INFO L321 Elim1Store]: treesize reduction 169, result has 21.4 percent of original size [2022-11-22 01:53:43,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 111 [2022-11-22 01:53:44,322 INFO L321 Elim1Store]: treesize reduction 348, result has 38.8 percent of original size [2022-11-22 01:53:44,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 116 treesize of output 285 [2022-11-22 01:53:44,883 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-22 01:53:44,987 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 13