./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--irda--ali-ircc.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e948c40f-f322-465a-b402-1146b6c74e17/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e948c40f-f322-465a-b402-1146b6c74e17/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e948c40f-f322-465a-b402-1146b6c74e17/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e948c40f-f322-465a-b402-1146b6c74e17/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--irda--ali-ircc.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e948c40f-f322-465a-b402-1146b6c74e17/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e948c40f-f322-465a-b402-1146b6c74e17/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash c454dc64a3cc485840c6830ce9e1c132fc674b92d2da550d28087d832958d75f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:47:49,820 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:47:49,823 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:47:49,868 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:47:49,869 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:47:49,873 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:47:49,875 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:47:49,879 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:47:49,881 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:47:49,887 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:47:49,888 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:47:49,890 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:47:49,891 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:47:49,893 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:47:49,895 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:47:49,900 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:47:49,902 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:47:49,903 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:47:49,905 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:47:49,912 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:47:49,914 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:47:49,916 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:47:49,917 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:47:49,918 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:47:49,921 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:47:49,922 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:47:49,922 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:47:49,923 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:47:49,924 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:47:49,925 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:47:49,926 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:47:49,926 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:47:49,927 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:47:49,928 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:47:49,929 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:47:49,930 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:47:49,930 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:47:49,931 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:47:49,931 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:47:49,932 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:47:49,932 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:47:49,933 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e948c40f-f322-465a-b402-1146b6c74e17/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-23 02:47:49,960 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:47:49,960 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:47:49,961 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:47:49,961 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:47:49,962 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:47:49,962 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:47:49,962 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:47:49,962 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:47:49,963 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:47:49,963 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:47:49,963 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:47:49,963 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:47:49,964 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:47:49,964 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:47:49,964 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:47:49,964 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:47:49,964 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:47:49,965 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:47:49,965 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:47:49,966 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:47:49,966 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:47:49,966 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:47:49,966 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:47:49,967 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:47:49,967 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:47:49,967 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:47:49,967 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:47:49,967 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:47:49,968 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:47:49,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:47:49,968 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:47:49,968 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:47:49,969 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:47:49,969 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:47:49,969 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:47:49,969 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:47:49,969 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:47:49,970 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:47:49,970 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e948c40f-f322-465a-b402-1146b6c74e17/bin/utaipan-EQgc7hIp5V/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e948c40f-f322-465a-b402-1146b6c74e17/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c454dc64a3cc485840c6830ce9e1c132fc674b92d2da550d28087d832958d75f [2021-11-23 02:47:50,270 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:47:50,296 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:47:50,300 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:47:50,302 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:47:50,303 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:47:50,304 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e948c40f-f322-465a-b402-1146b6c74e17/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--irda--ali-ircc.ko-entry_point.cil.out.i [2021-11-23 02:47:50,394 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e948c40f-f322-465a-b402-1146b6c74e17/bin/utaipan-EQgc7hIp5V/data/02ab803f6/74360ec8ce514590bca15c0ab93907c3/FLAG0a0f43818 [2021-11-23 02:47:51,194 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:47:51,195 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e948c40f-f322-465a-b402-1146b6c74e17/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--irda--ali-ircc.ko-entry_point.cil.out.i [2021-11-23 02:47:51,249 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e948c40f-f322-465a-b402-1146b6c74e17/bin/utaipan-EQgc7hIp5V/data/02ab803f6/74360ec8ce514590bca15c0ab93907c3/FLAG0a0f43818 [2021-11-23 02:47:51,694 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e948c40f-f322-465a-b402-1146b6c74e17/bin/utaipan-EQgc7hIp5V/data/02ab803f6/74360ec8ce514590bca15c0ab93907c3 [2021-11-23 02:47:51,697 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:47:51,698 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:47:51,700 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:47:51,700 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:47:51,704 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:47:51,705 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:47:51" (1/1) ... [2021-11-23 02:47:51,706 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a04b659 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:47:51, skipping insertion in model container [2021-11-23 02:47:51,706 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:47:51" (1/1) ... [2021-11-23 02:47:51,714 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:47:51,841 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:47:53,693 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_e948c40f-f322-465a-b402-1146b6c74e17/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--irda--ali-ircc.ko-entry_point.cil.out.i[301264,301277] [2021-11-23 02:47:53,742 WARN L610 FunctionHandler]: implicit declaration of function ldv_xmalloc [2021-11-23 02:47:53,758 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:47:53,801 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:47:54,221 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_e948c40f-f322-465a-b402-1146b6c74e17/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--irda--ali-ircc.ko-entry_point.cil.out.i[301264,301277] [2021-11-23 02:47:54,225 WARN L610 FunctionHandler]: implicit declaration of function ldv_xmalloc [2021-11-23 02:47:54,228 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:47:54,347 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:47:54,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:47:54 WrapperNode [2021-11-23 02:47:54,348 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:47:54,349 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:47:54,349 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:47:54,349 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:47:54,357 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:47:54" (1/1) ... [2021-11-23 02:47:54,451 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:47:54" (1/1) ... [2021-11-23 02:47:54,649 INFO L137 Inliner]: procedures = 221, calls = 2343, calls flagged for inlining = 115, calls inlined = 111, statements flattened = 4740 [2021-11-23 02:47:54,650 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:47:54,651 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:47:54,652 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:47:54,652 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:47:54,661 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:47:54" (1/1) ... [2021-11-23 02:47:54,662 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:47:54" (1/1) ... [2021-11-23 02:47:54,696 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:47:54" (1/1) ... [2021-11-23 02:47:54,697 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:47:54" (1/1) ... [2021-11-23 02:47:54,880 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:47:54" (1/1) ... [2021-11-23 02:47:54,917 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:47:54" (1/1) ... [2021-11-23 02:47:54,942 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:47:54" (1/1) ... [2021-11-23 02:47:54,973 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:47:54,974 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:47:54,975 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:47:54,975 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:47:54,976 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:47:54" (1/1) ... [2021-11-23 02:47:54,984 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:47:54,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e948c40f-f322-465a-b402-1146b6c74e17/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:47:55,015 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e948c40f-f322-465a-b402-1146b6c74e17/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:47:55,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e948c40f-f322-465a-b402-1146b6c74e17/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:47:55,063 INFO L130 BoogieDeclarations]: Found specification of procedure platform_driver_unregister [2021-11-23 02:47:55,063 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_driver_unregister [2021-11-23 02:47:55,064 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-23 02:47:55,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-23 02:47:55,064 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-23 02:47:55,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-23 02:47:55,064 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-23 02:47:55,065 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-23 02:47:55,065 INFO L130 BoogieDeclarations]: Found specification of procedure irda_setup_dma [2021-11-23 02:47:55,065 INFO L138 BoogieDeclarations]: Found implementation of procedure irda_setup_dma [2021-11-23 02:47:55,065 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-23 02:47:55,065 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-23 02:47:55,065 INFO L130 BoogieDeclarations]: Found specification of procedure debug_lockdep_rcu_enabled [2021-11-23 02:47:55,066 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_lockdep_rcu_enabled [2021-11-23 02:47:55,066 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2021-11-23 02:47:55,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2021-11-23 02:47:55,066 INFO L130 BoogieDeclarations]: Found specification of procedure ali_ircc_dma_receive_complete [2021-11-23 02:47:55,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ali_ircc_dma_receive_complete [2021-11-23 02:47:55,067 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-23 02:47:55,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-23 02:47:55,067 INFO L130 BoogieDeclarations]: Found specification of procedure free_irq [2021-11-23 02:47:55,067 INFO L138 BoogieDeclarations]: Found implementation of procedure free_irq [2021-11-23 02:47:55,067 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-23 02:47:55,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-23 02:47:55,069 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-23 02:47:55,069 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-23 02:47:55,069 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-23 02:47:55,069 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-23 02:47:55,069 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-23 02:47:55,070 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-23 02:47:55,070 INFO L130 BoogieDeclarations]: Found specification of procedure ktime_get [2021-11-23 02:47:55,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ktime_get [2021-11-23 02:47:55,070 INFO L130 BoogieDeclarations]: Found specification of procedure switch_bank [2021-11-23 02:47:55,070 INFO L138 BoogieDeclarations]: Found implementation of procedure switch_bank [2021-11-23 02:47:55,070 INFO L130 BoogieDeclarations]: Found specification of procedure dma_zalloc_coherent [2021-11-23 02:47:55,071 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_zalloc_coherent [2021-11-23 02:47:55,071 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2021-11-23 02:47:55,071 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2021-11-23 02:47:55,071 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:47:55,071 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 02:47:55,072 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-23 02:47:55,072 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2021-11-23 02:47:55,072 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2021-11-23 02:47:55,072 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_remove_4 [2021-11-23 02:47:55,072 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_remove_4 [2021-11-23 02:47:55,073 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-23 02:47:55,073 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-23 02:47:55,074 INFO L130 BoogieDeclarations]: Found specification of procedure ali_ircc_dma_receive [2021-11-23 02:47:55,075 INFO L138 BoogieDeclarations]: Found implementation of procedure ali_ircc_dma_receive [2021-11-23 02:47:55,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:47:55,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 02:47:55,076 INFO L130 BoogieDeclarations]: Found specification of procedure capable [2021-11-23 02:47:55,076 INFO L138 BoogieDeclarations]: Found implementation of procedure capable [2021-11-23 02:47:55,076 INFO L130 BoogieDeclarations]: Found specification of procedure ali_ircc_net_ioctl [2021-11-23 02:47:55,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ali_ircc_net_ioctl [2021-11-23 02:47:55,076 INFO L130 BoogieDeclarations]: Found specification of procedure SetCOMInterrupts [2021-11-23 02:47:55,076 INFO L138 BoogieDeclarations]: Found implementation of procedure SetCOMInterrupts [2021-11-23 02:47:55,077 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-23 02:47:55,077 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-23 02:47:55,077 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2021-11-23 02:47:55,077 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2021-11-23 02:47:55,078 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-23 02:47:55,078 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-23 02:47:55,078 INFO L130 BoogieDeclarations]: Found specification of procedure ali_ircc_change_dongle_speed [2021-11-23 02:47:55,078 INFO L138 BoogieDeclarations]: Found implementation of procedure ali_ircc_change_dongle_speed [2021-11-23 02:47:55,078 INFO L130 BoogieDeclarations]: Found specification of procedure SIR2FIR [2021-11-23 02:47:55,078 INFO L138 BoogieDeclarations]: Found implementation of procedure SIR2FIR [2021-11-23 02:47:55,079 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-23 02:47:55,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-23 02:47:55,079 INFO L130 BoogieDeclarations]: Found specification of procedure ali_ircc_net_close [2021-11-23 02:47:55,079 INFO L138 BoogieDeclarations]: Found implementation of procedure ali_ircc_net_close [2021-11-23 02:47:55,080 INFO L130 BoogieDeclarations]: Found specification of procedure dma_free_attrs [2021-11-23 02:47:55,080 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_free_attrs [2021-11-23 02:47:55,080 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:47:55,081 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-23 02:47:55,081 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-23 02:47:55,081 INFO L130 BoogieDeclarations]: Found specification of procedure ali_ircc_dma_xmit [2021-11-23 02:47:55,081 INFO L138 BoogieDeclarations]: Found implementation of procedure ali_ircc_dma_xmit [2021-11-23 02:47:55,081 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-23 02:47:55,081 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-23 02:47:55,082 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_is_watching [2021-11-23 02:47:55,082 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_is_watching [2021-11-23 02:47:55,083 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2021-11-23 02:47:55,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2021-11-23 02:47:55,083 INFO L130 BoogieDeclarations]: Found specification of procedure irda_get_next_speed [2021-11-23 02:47:55,083 INFO L138 BoogieDeclarations]: Found implementation of procedure irda_get_next_speed [2021-11-23 02:47:55,083 INFO L130 BoogieDeclarations]: Found specification of procedure ali_ircc_net_open [2021-11-23 02:47:55,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ali_ircc_net_open [2021-11-23 02:47:55,084 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2021-11-23 02:47:55,085 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2021-11-23 02:47:55,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:47:55,086 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_irq_1 [2021-11-23 02:47:55,086 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_irq_1 [2021-11-23 02:47:55,086 INFO L130 BoogieDeclarations]: Found specification of procedure net_ratelimit [2021-11-23 02:47:55,086 INFO L138 BoogieDeclarations]: Found implementation of procedure net_ratelimit [2021-11-23 02:47:55,086 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-23 02:47:55,086 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-23 02:47:55,087 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-23 02:47:55,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-23 02:47:55,087 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:47:55,087 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2021-11-23 02:47:55,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2021-11-23 02:47:55,088 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:47:55,088 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-23 02:47:55,088 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-23 02:47:55,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 02:47:55,089 INFO L130 BoogieDeclarations]: Found specification of procedure lockdep_rcu_suspicious [2021-11-23 02:47:55,089 INFO L138 BoogieDeclarations]: Found implementation of procedure lockdep_rcu_suspicious [2021-11-23 02:47:55,089 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-23 02:47:55,090 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_1 [2021-11-23 02:47:55,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_1 [2021-11-23 02:47:55,093 INFO L130 BoogieDeclarations]: Found specification of procedure FIR2SIR [2021-11-23 02:47:55,094 INFO L138 BoogieDeclarations]: Found implementation of procedure FIR2SIR [2021-11-23 02:47:55,094 INFO L130 BoogieDeclarations]: Found specification of procedure platform_get_drvdata [2021-11-23 02:47:55,095 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_get_drvdata [2021-11-23 02:47:55,095 INFO L130 BoogieDeclarations]: Found specification of procedure ali_ircc_change_speed [2021-11-23 02:47:55,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ali_ircc_change_speed [2021-11-23 02:47:55,096 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-23 02:47:55,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-23 02:47:55,103 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2021-11-23 02:47:55,103 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2021-11-23 02:47:55,103 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_unlock [2021-11-23 02:47:55,103 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_unlock [2021-11-23 02:47:55,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:47:55,104 INFO L130 BoogieDeclarations]: Found specification of procedure ali_ircc_resume [2021-11-23 02:47:55,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ali_ircc_resume [2021-11-23 02:47:55,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:47:55,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:47:55,863 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:47:55,866 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:47:57,090 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-23 02:48:01,820 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:48:02,811 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:48:02,811 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 02:48:02,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:48:02 BoogieIcfgContainer [2021-11-23 02:48:02,816 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:48:02,818 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:48:02,818 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:48:02,821 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:48:02,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:47:51" (1/3) ... [2021-11-23 02:48:02,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b6e0182 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:48:02, skipping insertion in model container [2021-11-23 02:48:02,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:47:54" (2/3) ... [2021-11-23 02:48:02,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b6e0182 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:48:02, skipping insertion in model container [2021-11-23 02:48:02,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:48:02" (3/3) ... [2021-11-23 02:48:02,824 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--net--irda--ali-ircc.ko-entry_point.cil.out.i [2021-11-23 02:48:02,829 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:48:02,829 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:48:02,882 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:48:02,888 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:48:02,888 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:48:02,934 INFO L276 IsEmpty]: Start isEmpty. Operand has 1064 states, 597 states have (on average 1.3249581239530988) internal successors, (791), 625 states have internal predecessors, (791), 411 states have call successors, (411), 55 states have call predecessors, (411), 54 states have return successors, (404), 395 states have call predecessors, (404), 404 states have call successors, (404) [2021-11-23 02:48:02,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-23 02:48:02,975 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:48:02,976 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:48:02,977 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:48:02,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:48:02,982 INFO L85 PathProgramCache]: Analyzing trace with hash -28259070, now seen corresponding path program 1 times [2021-11-23 02:48:02,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:48:02,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379446157] [2021-11-23 02:48:02,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:48:02,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:48:03,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:48:03,745 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-11-23 02:48:03,746 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:48:03,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379446157] [2021-11-23 02:48:03,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379446157] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:48:03,747 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:48:03,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:48:03,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949182507] [2021-11-23 02:48:03,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:48:03,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:48:03,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:48:03,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:48:03,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:48:03,788 INFO L87 Difference]: Start difference. First operand has 1064 states, 597 states have (on average 1.3249581239530988) internal successors, (791), 625 states have internal predecessors, (791), 411 states have call successors, (411), 55 states have call predecessors, (411), 54 states have return successors, (404), 395 states have call predecessors, (404), 404 states have call successors, (404) Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 3 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-23 02:48:05,785 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:48:07,838 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:48:08,968 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:48:13,142 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:48:14,312 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:48:16,416 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:48:18,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:48:18,293 INFO L93 Difference]: Finished difference Result 3094 states and 4698 transitions. [2021-11-23 02:48:18,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:48:18,296 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 3 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 180 [2021-11-23 02:48:18,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:48:18,340 INFO L225 Difference]: With dead ends: 3094 [2021-11-23 02:48:18,341 INFO L226 Difference]: Without dead ends: 1981 [2021-11-23 02:48:18,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:48:18,358 INFO L933 BasicCegarLoop]: 1938 mSDtfsCounter, 1482 mSDsluCounter, 5870 mSDsCounter, 0 mSdLazyCounter, 850 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1486 SdHoareTripleChecker+Valid, 7199 SdHoareTripleChecker+Invalid, 855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 850 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:48:18,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1486 Valid, 7199 Invalid, 855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 850 Invalid, 2 Unknown, 0 Unchecked, 14.2s Time] [2021-11-23 02:48:18,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1981 states. [2021-11-23 02:48:18,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1981 to 1971. [2021-11-23 02:48:18,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1971 states, 1111 states have (on average 1.3159315931593158) internal successors, (1462), 1150 states have internal predecessors, (1462), 757 states have call successors, (757), 103 states have call predecessors, (757), 102 states have return successors, (760), 737 states have call predecessors, (760), 756 states have call successors, (760) [2021-11-23 02:48:18,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1971 states to 1971 states and 2979 transitions. [2021-11-23 02:48:18,629 INFO L78 Accepts]: Start accepts. Automaton has 1971 states and 2979 transitions. Word has length 180 [2021-11-23 02:48:18,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:48:18,630 INFO L470 AbstractCegarLoop]: Abstraction has 1971 states and 2979 transitions. [2021-11-23 02:48:18,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 3 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-23 02:48:18,631 INFO L276 IsEmpty]: Start isEmpty. Operand 1971 states and 2979 transitions. [2021-11-23 02:48:18,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-23 02:48:18,648 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:48:18,649 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:48:18,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:48:18,649 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:48:18,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:48:18,650 INFO L85 PathProgramCache]: Analyzing trace with hash 12204330, now seen corresponding path program 1 times [2021-11-23 02:48:18,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:48:18,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803026457] [2021-11-23 02:48:18,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:48:18,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:48:18,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:48:19,031 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-11-23 02:48:19,032 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:48:19,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803026457] [2021-11-23 02:48:19,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803026457] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:48:19,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:48:19,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:48:19,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950337740] [2021-11-23 02:48:19,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:48:19,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:48:19,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:48:19,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:48:19,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:48:19,039 INFO L87 Difference]: Start difference. First operand 1971 states and 2979 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 3 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-23 02:48:25,398 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:48:27,968 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:48:30,148 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:48:30,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:48:30,242 INFO L93 Difference]: Finished difference Result 4940 states and 7467 transitions. [2021-11-23 02:48:30,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:48:30,243 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 3 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 179 [2021-11-23 02:48:30,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:48:30,279 INFO L225 Difference]: With dead ends: 4940 [2021-11-23 02:48:30,279 INFO L226 Difference]: Without dead ends: 2988 [2021-11-23 02:48:30,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:48:30,296 INFO L933 BasicCegarLoop]: 1876 mSDtfsCounter, 1515 mSDsluCounter, 5680 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1519 SdHoareTripleChecker+Valid, 6969 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:48:30,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1519 Valid, 6969 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 819 Invalid, 2 Unknown, 0 Unchecked, 10.9s Time] [2021-11-23 02:48:30,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2988 states. [2021-11-23 02:48:30,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2988 to 2976. [2021-11-23 02:48:30,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2976 states, 1680 states have (on average 1.3142857142857143) internal successors, (2208), 1738 states have internal predecessors, (2208), 1139 states have call successors, (1139), 157 states have call predecessors, (1139), 156 states have return successors, (1146), 1110 states have call predecessors, (1146), 1138 states have call successors, (1146) [2021-11-23 02:48:30,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2976 states to 2976 states and 4493 transitions. [2021-11-23 02:48:30,557 INFO L78 Accepts]: Start accepts. Automaton has 2976 states and 4493 transitions. Word has length 179 [2021-11-23 02:48:30,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:48:30,560 INFO L470 AbstractCegarLoop]: Abstraction has 2976 states and 4493 transitions. [2021-11-23 02:48:30,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 3 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-23 02:48:30,561 INFO L276 IsEmpty]: Start isEmpty. Operand 2976 states and 4493 transitions. [2021-11-23 02:48:30,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-23 02:48:30,580 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:48:30,580 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:48:30,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:48:30,581 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:48:30,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:48:30,582 INFO L85 PathProgramCache]: Analyzing trace with hash -168554529, now seen corresponding path program 1 times [2021-11-23 02:48:30,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:48:30,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349661715] [2021-11-23 02:48:30,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:48:30,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:48:30,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:48:30,925 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-11-23 02:48:30,925 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:48:30,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349661715] [2021-11-23 02:48:30,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349661715] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:48:30,927 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:48:30,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:48:30,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294078029] [2021-11-23 02:48:30,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:48:30,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:48:30,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:48:30,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:48:30,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:48:30,932 INFO L87 Difference]: Start difference. First operand 2976 states and 4493 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 3 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-23 02:48:32,987 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:48:38,194 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:48:40,226 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:48:42,227 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:48:44,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:48:44,288 INFO L93 Difference]: Finished difference Result 5955 states and 8987 transitions. [2021-11-23 02:48:44,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:48:44,289 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 3 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 178 [2021-11-23 02:48:44,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:48:44,316 INFO L225 Difference]: With dead ends: 5955 [2021-11-23 02:48:44,316 INFO L226 Difference]: Without dead ends: 2998 [2021-11-23 02:48:44,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:48:44,336 INFO L933 BasicCegarLoop]: 1876 mSDtfsCounter, 1515 mSDsluCounter, 5678 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1519 SdHoareTripleChecker+Valid, 6969 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:48:44,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1519 Valid, 6969 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 816 Invalid, 3 Unknown, 0 Unchecked, 13.1s Time] [2021-11-23 02:48:44,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2998 states. [2021-11-23 02:48:44,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2998 to 2986. [2021-11-23 02:48:44,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2986 states, 1688 states have (on average 1.3127962085308056) internal successors, (2216), 1746 states have internal predecessors, (2216), 1139 states have call successors, (1139), 159 states have call predecessors, (1139), 158 states have return successors, (1146), 1110 states have call predecessors, (1146), 1138 states have call successors, (1146) [2021-11-23 02:48:44,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2986 states to 2986 states and 4501 transitions. [2021-11-23 02:48:44,563 INFO L78 Accepts]: Start accepts. Automaton has 2986 states and 4501 transitions. Word has length 178 [2021-11-23 02:48:44,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:48:44,563 INFO L470 AbstractCegarLoop]: Abstraction has 2986 states and 4501 transitions. [2021-11-23 02:48:44,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 3 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-23 02:48:44,564 INFO L276 IsEmpty]: Start isEmpty. Operand 2986 states and 4501 transitions. [2021-11-23 02:48:44,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-23 02:48:44,575 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:48:44,575 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:48:44,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:48:44,576 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:48:44,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:48:44,576 INFO L85 PathProgramCache]: Analyzing trace with hash 613381735, now seen corresponding path program 1 times [2021-11-23 02:48:44,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:48:44,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102985629] [2021-11-23 02:48:44,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:48:44,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:48:44,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:48:44,798 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-11-23 02:48:44,799 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:48:44,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102985629] [2021-11-23 02:48:44,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102985629] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:48:44,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:48:44,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:48:44,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466489880] [2021-11-23 02:48:44,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:48:44,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:48:44,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:48:44,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:48:44,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:48:44,802 INFO L87 Difference]: Start difference. First operand 2986 states and 4501 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-23 02:48:46,851 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:48:51,534 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:48:54,052 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:48:56,089 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:48:59,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:48:59,584 INFO L93 Difference]: Finished difference Result 7656 states and 11529 transitions. [2021-11-23 02:48:59,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:48:59,585 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 177 [2021-11-23 02:48:59,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:48:59,627 INFO L225 Difference]: With dead ends: 7656 [2021-11-23 02:48:59,627 INFO L226 Difference]: Without dead ends: 4689 [2021-11-23 02:48:59,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:48:59,649 INFO L933 BasicCegarLoop]: 2163 mSDtfsCounter, 1518 mSDsluCounter, 6372 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 3 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1522 SdHoareTripleChecker+Valid, 7830 SdHoareTripleChecker+Invalid, 1010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:48:59,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1522 Valid, 7830 Invalid, 1010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1003 Invalid, 4 Unknown, 0 Unchecked, 14.5s Time] [2021-11-23 02:48:59,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4689 states. [2021-11-23 02:49:00,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4689 to 4636. [2021-11-23 02:49:00,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4636 states, 2602 states have (on average 1.313989239046887) internal successors, (3419), 2698 states have internal predecessors, (3419), 1780 states have call successors, (1780), 254 states have call predecessors, (1780), 253 states have return successors, (1795), 1729 states have call predecessors, (1795), 1779 states have call successors, (1795) [2021-11-23 02:49:00,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4636 states to 4636 states and 6994 transitions. [2021-11-23 02:49:00,088 INFO L78 Accepts]: Start accepts. Automaton has 4636 states and 6994 transitions. Word has length 177 [2021-11-23 02:49:00,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:49:00,089 INFO L470 AbstractCegarLoop]: Abstraction has 4636 states and 6994 transitions. [2021-11-23 02:49:00,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-23 02:49:00,090 INFO L276 IsEmpty]: Start isEmpty. Operand 4636 states and 6994 transitions. [2021-11-23 02:49:00,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-23 02:49:00,105 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:49:00,106 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:49:00,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:49:00,106 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:49:00,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:49:00,108 INFO L85 PathProgramCache]: Analyzing trace with hash 71105298, now seen corresponding path program 1 times [2021-11-23 02:49:00,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:49:00,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839858958] [2021-11-23 02:49:00,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:00,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:49:00,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:00,474 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-11-23 02:49:00,474 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:49:00,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839858958] [2021-11-23 02:49:00,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839858958] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:49:00,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36736590] [2021-11-23 02:49:00,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:00,475 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:49:00,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e948c40f-f322-465a-b402-1146b6c74e17/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:49:00,479 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e948c40f-f322-465a-b402-1146b6c74e17/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:49:00,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e948c40f-f322-465a-b402-1146b6c74e17/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:49:01,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:01,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 3925 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:49:01,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:49:01,946 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-11-23 02:49:01,947 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:49:01,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36736590] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:49:01,947 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:49:01,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2021-11-23 02:49:01,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319576739] [2021-11-23 02:49:01,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:49:01,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:49:01,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:49:01,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:49:01,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-11-23 02:49:01,950 INFO L87 Difference]: Start difference. First operand 4636 states and 6994 transitions. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-23 02:49:04,000 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:49:09,988 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:49:11,010 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:49:14,291 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:49:17,956 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:49:18,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:49:18,844 INFO L93 Difference]: Finished difference Result 10327 states and 15563 transitions. [2021-11-23 02:49:18,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 02:49:18,845 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) Word has length 190 [2021-11-23 02:49:18,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:49:18,900 INFO L225 Difference]: With dead ends: 10327 [2021-11-23 02:49:18,901 INFO L226 Difference]: Without dead ends: 7360 [2021-11-23 02:49:18,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-11-23 02:49:18,918 INFO L933 BasicCegarLoop]: 2530 mSDtfsCounter, 1519 mSDsluCounter, 12917 mSDsCounter, 0 mSdLazyCounter, 1818 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1523 SdHoareTripleChecker+Valid, 14020 SdHoareTripleChecker+Invalid, 1822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1818 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:49:18,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1523 Valid, 14020 Invalid, 1822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1818 Invalid, 3 Unknown, 0 Unchecked, 16.5s Time] [2021-11-23 02:49:18,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7360 states. [2021-11-23 02:49:19,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7360 to 7306. [2021-11-23 02:49:19,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7306 states, 4098 states have (on average 1.3145436798438264) internal successors, (5387), 4255 states have internal predecessors, (5387), 2803 states have call successors, (2803), 402 states have call predecessors, (2803), 404 states have return successors, (2837), 2720 states have call predecessors, (2837), 2802 states have call successors, (2837) [2021-11-23 02:49:19,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7306 states to 7306 states and 11027 transitions. [2021-11-23 02:49:19,546 INFO L78 Accepts]: Start accepts. Automaton has 7306 states and 11027 transitions. Word has length 190 [2021-11-23 02:49:19,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:49:19,547 INFO L470 AbstractCegarLoop]: Abstraction has 7306 states and 11027 transitions. [2021-11-23 02:49:19,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-23 02:49:19,547 INFO L276 IsEmpty]: Start isEmpty. Operand 7306 states and 11027 transitions. [2021-11-23 02:49:19,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-11-23 02:49:19,575 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:49:19,575 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:49:19,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e948c40f-f322-465a-b402-1146b6c74e17/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:49:19,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e948c40f-f322-465a-b402-1146b6c74e17/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:49:19,790 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:49:19,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:49:19,791 INFO L85 PathProgramCache]: Analyzing trace with hash 762020127, now seen corresponding path program 1 times [2021-11-23 02:49:19,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:49:19,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626645489] [2021-11-23 02:49:19,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:19,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:49:19,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:20,101 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-11-23 02:49:20,101 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:49:20,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626645489] [2021-11-23 02:49:20,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626645489] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:49:20,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246257969] [2021-11-23 02:49:20,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:20,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:49:20,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e948c40f-f322-465a-b402-1146b6c74e17/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:49:20,106 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e948c40f-f322-465a-b402-1146b6c74e17/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:49:20,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e948c40f-f322-465a-b402-1146b6c74e17/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:49:20,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:20,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 3927 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:49:20,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:49:21,406 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-11-23 02:49:21,407 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:49:21,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246257969] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:49:21,407 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:49:21,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2021-11-23 02:49:21,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446098869] [2021-11-23 02:49:21,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:49:21,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:49:21,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:49:21,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:49:21,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-23 02:49:21,409 INFO L87 Difference]: Start difference. First operand 7306 states and 11027 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 5 states have internal predecessors, (76), 3 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-23 02:49:23,449 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:49:29,237 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:49:32,745 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:49:35,610 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:49:42,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:49:42,943 INFO L93 Difference]: Finished difference Result 15684 states and 23644 transitions. [2021-11-23 02:49:42,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 02:49:42,949 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 5 states have internal predecessors, (76), 3 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) Word has length 191 [2021-11-23 02:49:42,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:49:43,028 INFO L225 Difference]: With dead ends: 15684 [2021-11-23 02:49:43,028 INFO L226 Difference]: Without dead ends: 10047 [2021-11-23 02:49:43,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-11-23 02:49:43,067 INFO L933 BasicCegarLoop]: 2688 mSDtfsCounter, 1519 mSDsluCounter, 13676 mSDsCounter, 0 mSdLazyCounter, 1993 mSolverCounterSat, 1 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1523 SdHoareTripleChecker+Valid, 14798 SdHoareTripleChecker+Invalid, 1998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1993 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:49:43,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1523 Valid, 14798 Invalid, 1998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1993 Invalid, 4 Unknown, 0 Unchecked, 21.1s Time] [2021-11-23 02:49:43,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10047 states. [2021-11-23 02:49:43,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10047 to 9980. [2021-11-23 02:49:43,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9980 states, 5596 states have (on average 1.314689063616869) internal successors, (7357), 5818 states have internal predecessors, (7357), 3826 states have call successors, (3826), 550 states have call predecessors, (3826), 557 states have return successors, (3881), 3709 states have call predecessors, (3881), 3825 states have call successors, (3881) [2021-11-23 02:49:43,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9980 states to 9980 states and 15064 transitions. [2021-11-23 02:49:43,972 INFO L78 Accepts]: Start accepts. Automaton has 9980 states and 15064 transitions. Word has length 191 [2021-11-23 02:49:43,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:49:43,974 INFO L470 AbstractCegarLoop]: Abstraction has 9980 states and 15064 transitions. [2021-11-23 02:49:43,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 5 states have internal predecessors, (76), 3 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-23 02:49:43,975 INFO L276 IsEmpty]: Start isEmpty. Operand 9980 states and 15064 transitions. [2021-11-23 02:49:44,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-23 02:49:44,007 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:49:44,008 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:49:44,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e948c40f-f322-465a-b402-1146b6c74e17/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:49:44,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e948c40f-f322-465a-b402-1146b6c74e17/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:49:44,234 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:49:44,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:49:44,234 INFO L85 PathProgramCache]: Analyzing trace with hash 809895481, now seen corresponding path program 1 times [2021-11-23 02:49:44,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:49:44,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058604348] [2021-11-23 02:49:44,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:44,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:49:44,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:44,561 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-11-23 02:49:44,561 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:49:44,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058604348] [2021-11-23 02:49:44,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058604348] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:49:44,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870532523] [2021-11-23 02:49:44,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:49:44,562 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:49:44,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e948c40f-f322-465a-b402-1146b6c74e17/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:49:44,563 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e948c40f-f322-465a-b402-1146b6c74e17/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:49:44,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e948c40f-f322-465a-b402-1146b6c74e17/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:49:45,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:49:45,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 3929 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:49:45,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:49:46,139 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-11-23 02:49:46,140 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:49:46,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870532523] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:49:46,140 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:49:46,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2021-11-23 02:49:46,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735056989] [2021-11-23 02:49:46,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:49:46,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:49:46,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:49:46,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:49:46,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-23 02:49:46,143 INFO L87 Difference]: Start difference. First operand 9980 states and 15064 transitions. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 5 states have internal predecessors, (77), 3 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-23 02:49:48,184 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:49:54,128 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:49:55,175 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:49:57,022 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:49:59,053 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:07,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:50:07,249 INFO L93 Difference]: Finished difference Result 21033 states and 31717 transitions. [2021-11-23 02:50:07,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 02:50:07,250 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 5 states have internal predecessors, (77), 3 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) Word has length 192 [2021-11-23 02:50:07,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:50:07,327 INFO L225 Difference]: With dead ends: 21033 [2021-11-23 02:50:07,327 INFO L226 Difference]: Without dead ends: 12722 [2021-11-23 02:50:07,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-11-23 02:50:07,369 INFO L933 BasicCegarLoop]: 2694 mSDtfsCounter, 1519 mSDsluCounter, 13704 mSDsCounter, 0 mSdLazyCounter, 2000 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1523 SdHoareTripleChecker+Valid, 14828 SdHoareTripleChecker+Invalid, 2003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2000 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:50:07,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1523 Valid, 14828 Invalid, 2003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2000 Invalid, 2 Unknown, 0 Unchecked, 20.6s Time] [2021-11-23 02:50:07,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12722 states. [2021-11-23 02:50:08,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12722 to 9981. [2021-11-23 02:50:08,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9981 states, 5597 states have (on average 1.314632839020904) internal successors, (7358), 5818 states have internal predecessors, (7358), 3826 states have call successors, (3826), 550 states have call predecessors, (3826), 557 states have return successors, (3881), 3710 states have call predecessors, (3881), 3825 states have call successors, (3881) [2021-11-23 02:50:08,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9981 states to 9981 states and 15065 transitions. [2021-11-23 02:50:08,622 INFO L78 Accepts]: Start accepts. Automaton has 9981 states and 15065 transitions. Word has length 192 [2021-11-23 02:50:08,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:50:08,623 INFO L470 AbstractCegarLoop]: Abstraction has 9981 states and 15065 transitions. [2021-11-23 02:50:08,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 5 states have internal predecessors, (77), 3 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-23 02:50:08,623 INFO L276 IsEmpty]: Start isEmpty. Operand 9981 states and 15065 transitions. [2021-11-23 02:50:08,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-11-23 02:50:08,735 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:50:08,735 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:50:08,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e948c40f-f322-465a-b402-1146b6c74e17/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:50:08,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e948c40f-f322-465a-b402-1146b6c74e17/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-23 02:50:08,935 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:50:08,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:50:08,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1896583706, now seen corresponding path program 1 times [2021-11-23 02:50:08,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:50:08,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892640441] [2021-11-23 02:50:08,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:50:08,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:50:09,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:50:09,356 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-11-23 02:50:09,357 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:50:09,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892640441] [2021-11-23 02:50:09,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892640441] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:50:09,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832653930] [2021-11-23 02:50:09,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:50:09,358 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:50:09,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e948c40f-f322-465a-b402-1146b6c74e17/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:50:09,359 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e948c40f-f322-465a-b402-1146b6c74e17/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:50:09,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e948c40f-f322-465a-b402-1146b6c74e17/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:50:10,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:50:10,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 3931 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:50:10,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:50:10,938 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-11-23 02:50:10,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:50:10,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832653930] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:50:10,938 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:50:10,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2021-11-23 02:50:10,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799287861] [2021-11-23 02:50:10,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:50:10,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:50:10,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:50:10,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:50:10,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-23 02:50:10,941 INFO L87 Difference]: Start difference. First operand 9981 states and 15065 transitions. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 5 states have internal predecessors, (78), 3 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-23 02:50:12,237 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:15,102 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:17,159 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:19,187 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:25,315 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:27,484 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:36,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:50:36,602 INFO L93 Difference]: Finished difference Result 21038 states and 31722 transitions. [2021-11-23 02:50:36,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 02:50:36,602 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 5 states have internal predecessors, (78), 3 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) Word has length 193 [2021-11-23 02:50:36,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:50:36,679 INFO L225 Difference]: With dead ends: 21038 [2021-11-23 02:50:36,679 INFO L226 Difference]: Without dead ends: 12726 [2021-11-23 02:50:36,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-11-23 02:50:36,780 INFO L933 BasicCegarLoop]: 2303 mSDtfsCounter, 1548 mSDsluCounter, 11864 mSDsCounter, 0 mSdLazyCounter, 1650 mSolverCounterSat, 2 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1552 SdHoareTripleChecker+Valid, 12860 SdHoareTripleChecker+Invalid, 1657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1650 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:50:36,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1552 Valid, 12860 Invalid, 1657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1650 Invalid, 5 Unknown, 0 Unchecked, 25.2s Time] [2021-11-23 02:50:36,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12726 states. [2021-11-23 02:50:38,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12726 to 9992. [2021-11-23 02:50:38,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9992 states, 5605 states have (on average 1.3141837644959857) internal successors, (7366), 5827 states have internal predecessors, (7366), 3826 states have call successors, (3826), 550 states have call predecessors, (3826), 560 states have return successors, (3884), 3712 states have call predecessors, (3884), 3825 states have call successors, (3884) [2021-11-23 02:50:38,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9992 states to 9992 states and 15076 transitions. [2021-11-23 02:50:38,257 INFO L78 Accepts]: Start accepts. Automaton has 9992 states and 15076 transitions. Word has length 193 [2021-11-23 02:50:38,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:50:38,258 INFO L470 AbstractCegarLoop]: Abstraction has 9992 states and 15076 transitions. [2021-11-23 02:50:38,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 5 states have internal predecessors, (78), 3 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-23 02:50:38,259 INFO L276 IsEmpty]: Start isEmpty. Operand 9992 states and 15076 transitions. [2021-11-23 02:50:38,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-11-23 02:50:38,317 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:50:38,319 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:50:38,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e948c40f-f322-465a-b402-1146b6c74e17/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:50:38,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e948c40f-f322-465a-b402-1146b6c74e17/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:50:38,530 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:50:38,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:50:38,531 INFO L85 PathProgramCache]: Analyzing trace with hash 840405230, now seen corresponding path program 1 times [2021-11-23 02:50:38,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:50:38,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309176631] [2021-11-23 02:50:38,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:50:38,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:50:38,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:50:38,982 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-11-23 02:50:38,982 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:50:38,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309176631] [2021-11-23 02:50:38,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309176631] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:50:38,983 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:50:38,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:50:38,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488526107] [2021-11-23 02:50:38,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:50:38,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:50:38,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:50:38,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:50:38,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:50:38,986 INFO L87 Difference]: Start difference. First operand 9992 states and 15076 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 2 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-23 02:50:43,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:50:43,317 INFO L93 Difference]: Finished difference Result 26332 states and 39628 transitions. [2021-11-23 02:50:43,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:50:43,317 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 2 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 204 [2021-11-23 02:50:43,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:50:43,409 INFO L225 Difference]: With dead ends: 26332 [2021-11-23 02:50:43,409 INFO L226 Difference]: Without dead ends: 16359 [2021-11-23 02:50:43,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:50:43,449 INFO L933 BasicCegarLoop]: 1733 mSDtfsCounter, 1429 mSDsluCounter, 1504 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1429 SdHoareTripleChecker+Valid, 3064 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:50:43,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1429 Valid, 3064 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-11-23 02:50:43,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16359 states. [2021-11-23 02:50:44,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16359 to 16272. [2021-11-23 02:50:44,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16272 states, 9114 states have (on average 1.3089752029844195) internal successors, (11930), 9500 states have internal predecessors, (11930), 6231 states have call successors, (6231), 907 states have call predecessors, (6231), 926 states have return successors, (6320), 6032 states have call predecessors, (6320), 6230 states have call successors, (6320) [2021-11-23 02:50:44,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16272 states to 16272 states and 24481 transitions. [2021-11-23 02:50:44,895 INFO L78 Accepts]: Start accepts. Automaton has 16272 states and 24481 transitions. Word has length 204 [2021-11-23 02:50:44,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:50:44,896 INFO L470 AbstractCegarLoop]: Abstraction has 16272 states and 24481 transitions. [2021-11-23 02:50:44,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 2 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-23 02:50:44,897 INFO L276 IsEmpty]: Start isEmpty. Operand 16272 states and 24481 transitions. [2021-11-23 02:50:44,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-11-23 02:50:44,933 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:50:44,933 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:50:44,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 02:50:44,934 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:50:44,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:50:44,935 INFO L85 PathProgramCache]: Analyzing trace with hash 581157375, now seen corresponding path program 1 times [2021-11-23 02:50:44,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:50:44,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027929316] [2021-11-23 02:50:44,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:50:44,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:50:45,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:50:45,159 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-11-23 02:50:45,159 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:50:45,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027929316] [2021-11-23 02:50:45,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027929316] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:50:45,160 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:50:45,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:50:45,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657258858] [2021-11-23 02:50:45,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:50:45,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:50:45,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:50:45,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:50:45,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:50:45,162 INFO L87 Difference]: Start difference. First operand 16272 states and 24481 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-23 02:50:47,173 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:50:48,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:50:48,202 INFO L93 Difference]: Finished difference Result 29981 states and 44863 transitions. [2021-11-23 02:50:48,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:50:48,203 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 207 [2021-11-23 02:50:48,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:50:48,285 INFO L225 Difference]: With dead ends: 29981 [2021-11-23 02:50:48,285 INFO L226 Difference]: Without dead ends: 13728 [2021-11-23 02:50:48,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:50:48,346 INFO L933 BasicCegarLoop]: 1247 mSDtfsCounter, 1411 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1411 SdHoareTripleChecker+Valid, 1247 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:50:48,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1411 Valid, 1247 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-11-23 02:50:48,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13728 states. [2021-11-23 02:50:49,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13728 to 13728. [2021-11-23 02:50:49,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13728 states, 7702 states have (on average 1.2930407686315242) internal successors, (9959), 7976 states have internal predecessors, (9959), 5179 states have call successors, (5179), 827 states have call predecessors, (5179), 846 states have return successors, (5252), 5046 states have call predecessors, (5252), 5178 states have call successors, (5252) [2021-11-23 02:50:49,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13728 states to 13728 states and 20390 transitions. [2021-11-23 02:50:49,737 INFO L78 Accepts]: Start accepts. Automaton has 13728 states and 20390 transitions. Word has length 207 [2021-11-23 02:50:49,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:50:49,738 INFO L470 AbstractCegarLoop]: Abstraction has 13728 states and 20390 transitions. [2021-11-23 02:50:49,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-23 02:50:49,739 INFO L276 IsEmpty]: Start isEmpty. Operand 13728 states and 20390 transitions. [2021-11-23 02:50:49,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-11-23 02:50:49,753 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:50:49,753 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:50:49,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 02:50:49,754 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:50:49,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:50:49,755 INFO L85 PathProgramCache]: Analyzing trace with hash -771551990, now seen corresponding path program 1 times [2021-11-23 02:50:49,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:50:49,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899494640] [2021-11-23 02:50:49,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:50:49,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:50:50,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:50:50,217 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-11-23 02:50:50,218 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:50:50,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899494640] [2021-11-23 02:50:50,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899494640] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:50:50,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304613692] [2021-11-23 02:50:50,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:50:50,219 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:50:50,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e948c40f-f322-465a-b402-1146b6c74e17/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:50:50,220 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e948c40f-f322-465a-b402-1146b6c74e17/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:50:50,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e948c40f-f322-465a-b402-1146b6c74e17/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 02:50:51,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:50:51,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 3998 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:50:51,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:50:52,053 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-11-23 02:50:52,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:50:52,896 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2021-11-23 02:50:52,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304613692] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:50:52,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [618716871] [2021-11-23 02:50:52,926 INFO L159 IcfgInterpreter]: Started Sifa with 118 locations of interest [2021-11-23 02:50:52,927 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:50:52,933 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:50:52,941 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:50:52,942 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:51:01,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:51:15,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:51:15,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:51:29,650 INFO L244 Elim1Store]: Index analysis took 30453 ms