./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--cx82310_eth.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c13f283-f526-4642-a8f5-24aadde5cd70/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c13f283-f526-4642-a8f5-24aadde5cd70/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c13f283-f526-4642-a8f5-24aadde5cd70/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c13f283-f526-4642-a8f5-24aadde5cd70/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--cx82310_eth.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c13f283-f526-4642-a8f5-24aadde5cd70/bin/utaipan-G1rejxKTta/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c13f283-f526-4642-a8f5-24aadde5cd70/bin/utaipan-G1rejxKTta --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 4e983f35cff7a0c67962e23f6c3d66292f25c728e4d1df204c975f306d1512a3 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 17:22:54,856 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:22:54,859 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:22:54,905 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:22:54,906 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:22:54,912 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:22:54,915 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:22:54,920 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:22:54,927 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:22:54,932 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:22:54,934 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:22:54,935 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:22:54,936 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:22:54,937 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:22:54,938 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:22:54,940 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:22:54,941 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:22:54,942 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:22:54,945 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:22:54,948 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:22:54,950 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:22:54,952 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:22:54,954 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:22:54,955 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:22:54,962 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:22:54,962 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:22:54,963 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:22:54,964 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:22:54,965 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:22:54,966 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:22:54,967 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:22:54,968 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:22:54,969 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:22:54,971 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:22:54,972 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:22:54,973 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:22:54,974 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:22:54,975 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:22:54,975 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:22:54,976 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:22:54,977 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:22:54,978 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c13f283-f526-4642-a8f5-24aadde5cd70/bin/utaipan-G1rejxKTta/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-10-17 17:22:55,024 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:22:55,024 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:22:55,025 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:22:55,025 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:22:55,026 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:22:55,026 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:22:55,026 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:22:55,027 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:22:55,027 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:22:55,027 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:22:55,027 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:22:55,028 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:22:55,028 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:22:55,028 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:22:55,028 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:22:55,029 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:22:55,029 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:22:55,029 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:22:55,030 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:22:55,030 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:22:55,030 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:22:55,031 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:22:55,031 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:22:55,031 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:22:55,031 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:22:55,032 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:22:55,032 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:22:55,032 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:22:55,032 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:22:55,033 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:22:55,033 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:22:55,033 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:22:55,033 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:22:55,034 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:22:55,034 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:22:55,034 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:22:55,034 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:22:55,035 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:22:55,039 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_7c13f283-f526-4642-a8f5-24aadde5cd70/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c13f283-f526-4642-a8f5-24aadde5cd70/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4e983f35cff7a0c67962e23f6c3d66292f25c728e4d1df204c975f306d1512a3 [2022-10-17 17:22:55,374 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:22:55,411 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:22:55,414 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:22:55,416 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:22:55,417 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:22:55,419 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c13f283-f526-4642-a8f5-24aadde5cd70/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--cx82310_eth.ko-entry_point.cil.out.i [2022-10-17 17:22:55,526 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c13f283-f526-4642-a8f5-24aadde5cd70/bin/utaipan-G1rejxKTta/data/6b3c7b131/7dd6887b9f10461084f59c8b8aefc96d/FLAG9e0a2fa5d [2022-10-17 17:22:56,369 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:22:56,370 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c13f283-f526-4642-a8f5-24aadde5cd70/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--cx82310_eth.ko-entry_point.cil.out.i [2022-10-17 17:22:56,421 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c13f283-f526-4642-a8f5-24aadde5cd70/bin/utaipan-G1rejxKTta/data/6b3c7b131/7dd6887b9f10461084f59c8b8aefc96d/FLAG9e0a2fa5d [2022-10-17 17:22:56,868 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c13f283-f526-4642-a8f5-24aadde5cd70/bin/utaipan-G1rejxKTta/data/6b3c7b131/7dd6887b9f10461084f59c8b8aefc96d [2022-10-17 17:22:56,871 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:22:56,872 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:22:56,874 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:22:56,874 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:22:56,879 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:22:56,880 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:22:56" (1/1) ... [2022-10-17 17:22:56,883 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@151c0059 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:56, skipping insertion in model container [2022-10-17 17:22:56,884 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:22:56" (1/1) ... [2022-10-17 17:22:56,893 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:22:57,040 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:22:58,031 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c13f283-f526-4642-a8f5-24aadde5cd70/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--cx82310_eth.ko-entry_point.cil.out.i[159401,159414] [2022-10-17 17:22:58,388 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:22:58,430 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:22:58,653 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c13f283-f526-4642-a8f5-24aadde5cd70/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--cx82310_eth.ko-entry_point.cil.out.i[159401,159414] [2022-10-17 17:22:58,750 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:22:58,791 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:22:58,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:58 WrapperNode [2022-10-17 17:22:58,791 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:22:58,792 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:22:58,792 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:22:58,793 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:22:58,800 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:58" (1/1) ... [2022-10-17 17:22:58,862 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:58" (1/1) ... [2022-10-17 17:22:58,937 INFO L138 Inliner]: procedures = 102, calls = 315, calls flagged for inlining = 35, calls inlined = 32, statements flattened = 987 [2022-10-17 17:22:58,938 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:22:58,938 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:22:58,939 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:22:58,939 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:22:58,948 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:58" (1/1) ... [2022-10-17 17:22:58,948 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:58" (1/1) ... [2022-10-17 17:22:58,956 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:58" (1/1) ... [2022-10-17 17:22:58,957 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:58" (1/1) ... [2022-10-17 17:22:58,997 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:58" (1/1) ... [2022-10-17 17:22:59,005 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:58" (1/1) ... [2022-10-17 17:22:59,012 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:58" (1/1) ... [2022-10-17 17:22:59,019 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:58" (1/1) ... [2022-10-17 17:22:59,071 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:22:59,072 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:22:59,072 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:22:59,072 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:22:59,073 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:58" (1/1) ... [2022-10-17 17:22:59,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:22:59,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c13f283-f526-4642-a8f5-24aadde5cd70/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:22:59,105 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c13f283-f526-4642-a8f5-24aadde5cd70/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:22:59,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c13f283-f526-4642-a8f5-24aadde5cd70/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:22:59,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-10-17 17:22:59,150 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-10-17 17:22:59,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-10-17 17:22:59,150 INFO L130 BoogieDeclarations]: Found specification of procedure usb_bulk_msg [2022-10-17 17:22:59,150 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_bulk_msg [2022-10-17 17:22:59,150 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-10-17 17:22:59,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-10-17 17:22:59,151 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 17:22:59,151 INFO L130 BoogieDeclarations]: Found specification of procedure cx82310_tx_fixup [2022-10-17 17:22:59,152 INFO L138 BoogieDeclarations]: Found implementation of procedure cx82310_tx_fixup [2022-10-17 17:22:59,152 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_disconnect [2022-10-17 17:22:59,152 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_disconnect [2022-10-17 17:22:59,152 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-10-17 17:22:59,152 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-10-17 17:22:59,152 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-10-17 17:22:59,153 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-10-17 17:22:59,153 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-10-17 17:22:59,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-10-17 17:22:59,153 INFO L130 BoogieDeclarations]: Found specification of procedure cx82310_rx_fixup [2022-10-17 17:22:59,153 INFO L138 BoogieDeclarations]: Found implementation of procedure cx82310_rx_fixup [2022-10-17 17:22:59,153 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc_skb_12 [2022-10-17 17:22:59,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc_skb_12 [2022-10-17 17:22:59,154 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2022-10-17 17:22:59,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2022-10-17 17:22:59,154 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-10-17 17:22:59,154 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-10-17 17:22:59,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 17:22:59,154 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-10-17 17:22:59,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-10-17 17:22:59,155 INFO L130 BoogieDeclarations]: Found specification of procedure skb_pull [2022-10-17 17:22:59,155 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_pull [2022-10-17 17:22:59,155 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-10-17 17:22:59,155 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-10-17 17:22:59,156 INFO L130 BoogieDeclarations]: Found specification of procedure usbnet_skb_return [2022-10-17 17:22:59,156 INFO L138 BoogieDeclarations]: Found implementation of procedure usbnet_skb_return [2022-10-17 17:22:59,156 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-10-17 17:22:59,156 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-10-17 17:22:59,156 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-17 17:22:59,156 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:22:59,156 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-10-17 17:22:59,157 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 17:22:59,157 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-10-17 17:22:59,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 17:22:59,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-10-17 17:22:59,157 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2022-10-17 17:22:59,158 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2022-10-17 17:22:59,158 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-10-17 17:22:59,158 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-10-17 17:22:59,159 INFO L130 BoogieDeclarations]: Found specification of procedure cx82310_cmd [2022-10-17 17:22:59,160 INFO L138 BoogieDeclarations]: Found implementation of procedure cx82310_cmd [2022-10-17 17:22:59,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:22:59,160 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-10-17 17:22:59,161 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-10-17 17:22:59,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-10-17 17:22:59,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:22:59,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:22:59,557 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:22:59,559 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:22:59,771 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-10-17 17:23:01,608 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:23:01,822 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:23:01,823 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-10-17 17:23:01,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:23:01 BoogieIcfgContainer [2022-10-17 17:23:01,828 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:23:01,830 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:23:01,831 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:23:01,835 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:23:01,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:22:56" (1/3) ... [2022-10-17 17:23:01,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72a7cffc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:23:01, skipping insertion in model container [2022-10-17 17:23:01,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:22:58" (2/3) ... [2022-10-17 17:23:01,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72a7cffc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:23:01, skipping insertion in model container [2022-10-17 17:23:01,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:23:01" (3/3) ... [2022-10-17 17:23:01,840 INFO L112 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--usb--cx82310_eth.ko-entry_point.cil.out.i [2022-10-17 17:23:01,862 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:23:01,863 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:23:01,941 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:23:01,947 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;@479c69b9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:23:01,947 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:23:01,957 INFO L276 IsEmpty]: Start isEmpty. Operand has 241 states, 165 states have (on average 1.4424242424242424) internal successors, (238), 171 states have internal predecessors, (238), 55 states have call successors, (55), 20 states have call predecessors, (55), 19 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2022-10-17 17:23:01,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-10-17 17:23:01,976 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:01,977 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] [2022-10-17 17:23:01,980 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:23:01,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:01,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1816463045, now seen corresponding path program 1 times [2022-10-17 17:23:02,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:02,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005472423] [2022-10-17 17:23:02,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:02,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:02,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:02,723 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-17 17:23:02,724 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:02,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005472423] [2022-10-17 17:23:02,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005472423] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:23:02,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:23:02,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:23:02,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67336720] [2022-10-17 17:23:02,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:23:02,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:23:02,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:23:02,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:23:02,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:23:02,778 INFO L87 Difference]: Start difference. First operand has 241 states, 165 states have (on average 1.4424242424242424) internal successors, (238), 171 states have internal predecessors, (238), 55 states have call successors, (55), 20 states have call predecessors, (55), 19 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 17:23:04,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:23:04,287 INFO L93 Difference]: Finished difference Result 685 states and 994 transitions. [2022-10-17 17:23:04,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:23:04,293 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 27 [2022-10-17 17:23:04,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:23:04,320 INFO L225 Difference]: With dead ends: 685 [2022-10-17 17:23:04,321 INFO L226 Difference]: Without dead ends: 442 [2022-10-17 17:23:04,333 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 [2022-10-17 17:23:04,344 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 303 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-10-17 17:23:04,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 638 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-10-17 17:23:04,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2022-10-17 17:23:04,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 442. [2022-10-17 17:23:04,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 312 states have (on average 1.4070512820512822) internal successors, (439), 312 states have internal predecessors, (439), 94 states have call successors, (94), 36 states have call predecessors, (94), 35 states have return successors, (93), 93 states have call predecessors, (93), 93 states have call successors, (93) [2022-10-17 17:23:04,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 626 transitions. [2022-10-17 17:23:04,484 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 626 transitions. Word has length 27 [2022-10-17 17:23:04,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:23:04,485 INFO L495 AbstractCegarLoop]: Abstraction has 442 states and 626 transitions. [2022-10-17 17:23:04,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 17:23:04,491 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 626 transitions. [2022-10-17 17:23:04,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-10-17 17:23:04,502 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:04,502 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:23:04,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:23:04,503 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:23:04,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:04,503 INFO L85 PathProgramCache]: Analyzing trace with hash 2090848523, now seen corresponding path program 1 times [2022-10-17 17:23:04,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:04,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093920037] [2022-10-17 17:23:04,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:04,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:04,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:04,996 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-17 17:23:04,996 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:04,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093920037] [2022-10-17 17:23:04,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093920037] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:23:04,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:23:04,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:23:04,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638282602] [2022-10-17 17:23:04,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:23:04,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:23:05,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:23:05,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:23:05,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:23:05,001 INFO L87 Difference]: Start difference. First operand 442 states and 626 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-17 17:23:06,516 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-17 17:23:07,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:23:07,179 INFO L93 Difference]: Finished difference Result 874 states and 1249 transitions. [2022-10-17 17:23:07,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:23:07,184 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 36 [2022-10-17 17:23:07,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:23:07,200 INFO L225 Difference]: With dead ends: 874 [2022-10-17 17:23:07,200 INFO L226 Difference]: Without dead ends: 869 [2022-10-17 17:23:07,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:23:07,207 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 309 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 990 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:23:07,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 990 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-10-17 17:23:07,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2022-10-17 17:23:07,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 867. [2022-10-17 17:23:07,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 613 states have (on average 1.4078303425774878) internal successors, (863), 613 states have internal predecessors, (863), 184 states have call successors, (184), 70 states have call predecessors, (184), 69 states have return successors, (193), 183 states have call predecessors, (193), 183 states have call successors, (193) [2022-10-17 17:23:07,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 1240 transitions. [2022-10-17 17:23:07,321 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 1240 transitions. Word has length 36 [2022-10-17 17:23:07,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:23:07,321 INFO L495 AbstractCegarLoop]: Abstraction has 867 states and 1240 transitions. [2022-10-17 17:23:07,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-17 17:23:07,322 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 1240 transitions. [2022-10-17 17:23:07,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-10-17 17:23:07,331 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:07,332 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:23:07,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 17:23:07,332 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:23:07,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:07,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1465494205, now seen corresponding path program 1 times [2022-10-17 17:23:07,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:07,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924465457] [2022-10-17 17:23:07,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:07,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:07,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:07,523 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-10-17 17:23:07,523 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:07,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924465457] [2022-10-17 17:23:07,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924465457] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:23:07,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:23:07,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:23:07,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887505487] [2022-10-17 17:23:07,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:23:07,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:23:07,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:23:07,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:23:07,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:23:07,526 INFO L87 Difference]: Start difference. First operand 867 states and 1240 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-10-17 17:23:09,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-17 17:23:09,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:23:09,380 INFO L93 Difference]: Finished difference Result 1881 states and 2693 transitions. [2022-10-17 17:23:09,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:23:09,380 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 88 [2022-10-17 17:23:09,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:23:09,390 INFO L225 Difference]: With dead ends: 1881 [2022-10-17 17:23:09,390 INFO L226 Difference]: Without dead ends: 1024 [2022-10-17 17:23:09,394 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 [2022-10-17 17:23:09,396 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 72 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-10-17 17:23:09,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 563 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-10-17 17:23:09,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2022-10-17 17:23:09,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 1019. [2022-10-17 17:23:09,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 742 states have (on average 1.4218328840970351) internal successors, (1055), 742 states have internal predecessors, (1055), 197 states have call successors, (197), 80 states have call predecessors, (197), 79 states have return successors, (206), 196 states have call predecessors, (206), 196 states have call successors, (206) [2022-10-17 17:23:09,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 1458 transitions. [2022-10-17 17:23:09,479 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 1458 transitions. Word has length 88 [2022-10-17 17:23:09,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:23:09,480 INFO L495 AbstractCegarLoop]: Abstraction has 1019 states and 1458 transitions. [2022-10-17 17:23:09,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-10-17 17:23:09,481 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 1458 transitions. [2022-10-17 17:23:09,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-10-17 17:23:09,486 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:09,487 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:23:09,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 17:23:09,488 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:23:09,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:09,488 INFO L85 PathProgramCache]: Analyzing trace with hash -930107454, now seen corresponding path program 1 times [2022-10-17 17:23:09,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:09,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967594592] [2022-10-17 17:23:09,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:09,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:09,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:09,726 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-10-17 17:23:09,727 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:09,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967594592] [2022-10-17 17:23:09,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967594592] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:23:09,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:23:09,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:23:09,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259936016] [2022-10-17 17:23:09,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:23:09,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:23:09,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:23:09,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:23:09,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:23:09,730 INFO L87 Difference]: Start difference. First operand 1019 states and 1458 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-10-17 17:23:11,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:23:11,105 INFO L93 Difference]: Finished difference Result 2587 states and 3689 transitions. [2022-10-17 17:23:11,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:23:11,105 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 112 [2022-10-17 17:23:11,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:23:11,118 INFO L225 Difference]: With dead ends: 2587 [2022-10-17 17:23:11,118 INFO L226 Difference]: Without dead ends: 1586 [2022-10-17 17:23:11,123 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 [2022-10-17 17:23:11,124 INFO L413 NwaCegarLoop]: 389 mSDtfsCounter, 284 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-10-17 17:23:11,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 570 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-10-17 17:23:11,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1586 states. [2022-10-17 17:23:11,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1586 to 1581. [2022-10-17 17:23:11,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1581 states, 1154 states have (on average 1.39948006932409) internal successors, (1615), 1154 states have internal predecessors, (1615), 295 states have call successors, (295), 132 states have call predecessors, (295), 131 states have return successors, (310), 294 states have call predecessors, (310), 294 states have call successors, (310) [2022-10-17 17:23:11,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1581 states to 1581 states and 2220 transitions. [2022-10-17 17:23:11,268 INFO L78 Accepts]: Start accepts. Automaton has 1581 states and 2220 transitions. Word has length 112 [2022-10-17 17:23:11,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:23:11,271 INFO L495 AbstractCegarLoop]: Abstraction has 1581 states and 2220 transitions. [2022-10-17 17:23:11,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-10-17 17:23:11,271 INFO L276 IsEmpty]: Start isEmpty. Operand 1581 states and 2220 transitions. [2022-10-17 17:23:11,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-10-17 17:23:11,277 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:11,277 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:23:11,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 17:23:11,278 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:23:11,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:11,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1128035756, now seen corresponding path program 1 times [2022-10-17 17:23:11,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:11,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320287867] [2022-10-17 17:23:11,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:11,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:11,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:11,733 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-10-17 17:23:11,733 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:11,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320287867] [2022-10-17 17:23:11,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320287867] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:23:11,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:23:11,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 17:23:11,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097049282] [2022-10-17 17:23:11,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:23:11,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 17:23:11,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:23:11,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 17:23:11,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:23:11,736 INFO L87 Difference]: Start difference. First operand 1581 states and 2220 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 1 states have call successors, (11) [2022-10-17 17:23:13,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:23:13,716 INFO L93 Difference]: Finished difference Result 3198 states and 4539 transitions. [2022-10-17 17:23:13,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 17:23:13,717 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 1 states have call successors, (11) Word has length 97 [2022-10-17 17:23:13,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:23:13,730 INFO L225 Difference]: With dead ends: 3198 [2022-10-17 17:23:13,730 INFO L226 Difference]: Without dead ends: 1635 [2022-10-17 17:23:13,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:23:13,740 INFO L413 NwaCegarLoop]: 289 mSDtfsCounter, 2 mSDsluCounter, 973 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1145 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-10-17 17:23:13,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1145 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-10-17 17:23:13,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2022-10-17 17:23:13,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1621. [2022-10-17 17:23:13,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1182 states have (on average 1.3900169204737733) internal successors, (1643), 1186 states have internal predecessors, (1643), 295 states have call successors, (295), 132 states have call predecessors, (295), 143 states have return successors, (332), 302 states have call predecessors, (332), 294 states have call successors, (332) [2022-10-17 17:23:13,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 2270 transitions. [2022-10-17 17:23:13,847 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 2270 transitions. Word has length 97 [2022-10-17 17:23:13,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:23:13,847 INFO L495 AbstractCegarLoop]: Abstraction has 1621 states and 2270 transitions. [2022-10-17 17:23:13,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 1 states have call successors, (11) [2022-10-17 17:23:13,848 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 2270 transitions. [2022-10-17 17:23:13,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-10-17 17:23:13,852 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:13,853 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:23:13,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 17:23:13,853 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:23:13,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:13,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1620841399, now seen corresponding path program 1 times [2022-10-17 17:23:13,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:13,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534873145] [2022-10-17 17:23:13,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:13,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:13,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:14,418 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-10-17 17:23:14,418 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:14,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534873145] [2022-10-17 17:23:14,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534873145] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:23:14,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:23:14,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-10-17 17:23:14,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940271469] [2022-10-17 17:23:14,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:23:14,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-17 17:23:14,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:23:14,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-17 17:23:14,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-10-17 17:23:14,422 INFO L87 Difference]: Start difference. First operand 1621 states and 2270 transitions. Second operand has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 7 states have internal predecessors, (70), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 2 states have call successors, (14) [2022-10-17 17:23:18,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-17 17:23:19,572 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-17 17:23:21,729 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-17 17:23:22,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-17 17:23:23,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:23:23,248 INFO L93 Difference]: Finished difference Result 3286 states and 4649 transitions. [2022-10-17 17:23:23,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-17 17:23:23,249 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 7 states have internal predecessors, (70), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 2 states have call successors, (14) Word has length 116 [2022-10-17 17:23:23,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:23:23,265 INFO L225 Difference]: With dead ends: 3286 [2022-10-17 17:23:23,266 INFO L226 Difference]: Without dead ends: 1683 [2022-10-17 17:23:23,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-10-17 17:23:23,275 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 10 mSDsluCounter, 2331 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 2362 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2022-10-17 17:23:23,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 2362 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 8.7s Time] [2022-10-17 17:23:23,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1683 states. [2022-10-17 17:23:23,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1683 to 1661. [2022-10-17 17:23:23,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1661 states, 1210 states have (on average 1.3743801652892562) internal successors, (1663), 1214 states have internal predecessors, (1663), 299 states have call successors, (299), 132 states have call predecessors, (299), 151 states have return successors, (348), 314 states have call predecessors, (348), 298 states have call successors, (348) [2022-10-17 17:23:23,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1661 states to 1661 states and 2310 transitions. [2022-10-17 17:23:23,386 INFO L78 Accepts]: Start accepts. Automaton has 1661 states and 2310 transitions. Word has length 116 [2022-10-17 17:23:23,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:23:23,387 INFO L495 AbstractCegarLoop]: Abstraction has 1661 states and 2310 transitions. [2022-10-17 17:23:23,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 7 states have internal predecessors, (70), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 2 states have call successors, (14) [2022-10-17 17:23:23,388 INFO L276 IsEmpty]: Start isEmpty. Operand 1661 states and 2310 transitions. [2022-10-17 17:23:23,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-10-17 17:23:23,394 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:23,394 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:23:23,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 17:23:23,395 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:23:23,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:23,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1373976491, now seen corresponding path program 1 times [2022-10-17 17:23:23,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:23,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226173299] [2022-10-17 17:23:23,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:23,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:23,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:24,092 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-10-17 17:23:24,092 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:24,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226173299] [2022-10-17 17:23:24,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226173299] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:23:24,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506278432] [2022-10-17 17:23:24,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:24,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:23:24,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c13f283-f526-4642-a8f5-24aadde5cd70/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:23:24,095 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c13f283-f526-4642-a8f5-24aadde5cd70/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:23:24,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c13f283-f526-4642-a8f5-24aadde5cd70/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 17:23:24,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:24,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 1274 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-17 17:23:24,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:23:24,803 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-10-17 17:23:24,805 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:23:24,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506278432] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:23:24,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:23:24,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-10-17 17:23:24,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221497280] [2022-10-17 17:23:24,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:23:24,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:23:24,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:23:24,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:23:24,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:23:24,809 INFO L87 Difference]: Start difference. First operand 1661 states and 2310 transitions. Second operand has 4 states, 3 states have (on average 23.666666666666668) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-10-17 17:23:26,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:23:26,849 INFO L93 Difference]: Finished difference Result 3312 states and 4610 transitions. [2022-10-17 17:23:26,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:23:26,863 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 23.666666666666668) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 122 [2022-10-17 17:23:26,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:23:26,875 INFO L225 Difference]: With dead ends: 3312 [2022-10-17 17:23:26,875 INFO L226 Difference]: Without dead ends: 1662 [2022-10-17 17:23:26,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:23:26,892 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 1 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 867 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-10-17 17:23:26,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 867 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-10-17 17:23:26,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1662 states. [2022-10-17 17:23:27,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1662 to 1662. [2022-10-17 17:23:27,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1662 states, 1211 states have (on average 1.3740710156895128) internal successors, (1664), 1215 states have internal predecessors, (1664), 299 states have call successors, (299), 132 states have call predecessors, (299), 151 states have return successors, (348), 314 states have call predecessors, (348), 298 states have call successors, (348) [2022-10-17 17:23:27,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 2311 transitions. [2022-10-17 17:23:27,048 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 2311 transitions. Word has length 122 [2022-10-17 17:23:27,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:23:27,049 INFO L495 AbstractCegarLoop]: Abstraction has 1662 states and 2311 transitions. [2022-10-17 17:23:27,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 23.666666666666668) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-10-17 17:23:27,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 2311 transitions. [2022-10-17 17:23:27,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-10-17 17:23:27,054 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:27,054 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:23:27,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c13f283-f526-4642-a8f5-24aadde5cd70/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 17:23:27,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c13f283-f526-4642-a8f5-24aadde5cd70/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:23:27,271 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:23:27,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:27,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1544724129, now seen corresponding path program 1 times [2022-10-17 17:23:27,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:27,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766560930] [2022-10-17 17:23:27,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:27,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:27,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:27,832 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-10-17 17:23:27,832 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:27,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766560930] [2022-10-17 17:23:27,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766560930] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:23:27,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311181599] [2022-10-17 17:23:27,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:27,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:23:27,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c13f283-f526-4642-a8f5-24aadde5cd70/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:23:27,834 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c13f283-f526-4642-a8f5-24aadde5cd70/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:23:27,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c13f283-f526-4642-a8f5-24aadde5cd70/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 17:23:28,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:28,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 1246 conjuncts, 10 conjunts are in the unsatisfiable core [2022-10-17 17:23:28,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:23:28,592 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-10-17 17:23:28,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:23:28,801 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-10-17 17:23:28,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311181599] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:23:28,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [853814026] [2022-10-17 17:23:28,832 INFO L159 IcfgInterpreter]: Started Sifa with 77 locations of interest [2022-10-17 17:23:28,832 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:23:28,877 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:23:28,883 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:23:28,884 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:23:29,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:29,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:29,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:29,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:29,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:29,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:29,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:29,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:29,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:29,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:29,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:29,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:29,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:29,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:29,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:29,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:29,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:29,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:29,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:29,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:29,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:29,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:30,037 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 134 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 243 [2022-10-17 17:23:30,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:30,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:30,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:30,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:30,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:30,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:30,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:30,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:30,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:30,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:30,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:30,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:30,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:30,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:30,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:30,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:30,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:30,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:30,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:30,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:30,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:30,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:30,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:30,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:30,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:30,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:30,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:30,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:30,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:30,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:30,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:30,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:30,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:30,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:30,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:30,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:30,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:30,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:30,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:30,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:30,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:30,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:30,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:30,280 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 44 select indices, 44 select index equivalence classes, 547 disjoint index pairs (out of 946 index pairs), introduced 45 new quantified variables, introduced 0 case distinctions, treesize of input 415 treesize of output 550 [2022-10-17 17:23:30,358 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 400 treesize of output 321