./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/n.c24.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf51dd0-a167-49dd-9663-6db01d607682/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf51dd0-a167-49dd-9663-6db01d607682/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf51dd0-a167-49dd-9663-6db01d607682/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf51dd0-a167-49dd-9663-6db01d607682/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/n.c24.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf51dd0-a167-49dd-9663-6db01d607682/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf51dd0-a167-49dd-9663-6db01d607682/bin/utaipan-ByfvJB40ur --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 32bit --witnessprinter.graph.data.programhash ff2f22c8c94593047c07aca289bcba7e507bc3ee948a7529dc94c8d7792bd95d --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 01:01:54,784 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 01:01:54,786 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 01:01:54,833 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 01:01:54,833 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 01:01:54,838 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 01:01:54,841 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 01:01:54,847 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 01:01:54,850 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 01:01:54,852 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 01:01:54,855 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 01:01:54,859 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 01:01:54,860 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 01:01:54,863 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 01:01:54,865 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 01:01:54,866 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 01:01:54,867 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 01:01:54,869 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 01:01:54,871 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 01:01:54,873 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 01:01:54,875 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 01:01:54,877 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 01:01:54,879 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 01:01:54,880 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 01:01:54,885 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 01:01:54,885 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 01:01:54,886 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 01:01:54,887 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 01:01:54,887 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 01:01:54,889 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 01:01:54,889 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 01:01:54,890 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 01:01:54,891 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 01:01:54,892 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 01:01:54,894 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 01:01:54,894 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 01:01:54,895 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 01:01:54,896 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 01:01:54,896 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 01:01:54,897 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 01:01:54,898 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 01:01:54,900 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf51dd0-a167-49dd-9663-6db01d607682/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 01:01:54,930 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 01:01:54,930 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 01:01:54,931 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 01:01:54,931 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 01:01:54,932 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 01:01:54,932 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 01:01:54,933 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 01:01:54,933 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 01:01:54,933 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 01:01:54,933 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 01:01:54,934 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 01:01:54,934 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 01:01:54,934 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 01:01:54,934 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 01:01:54,935 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 01:01:54,935 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 01:01:54,935 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 01:01:54,936 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 01:01:54,936 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 01:01:54,937 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 01:01:54,937 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 01:01:54,937 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 01:01:54,938 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 01:01:54,938 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 01:01:54,938 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 01:01:54,938 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 01:01:54,939 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 01:01:54,939 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 01:01:54,939 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 01:01:54,939 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 01:01:54,940 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 01:01:54,940 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 01:01:54,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:01:54,940 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 01:01:54,941 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 01:01:54,941 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 01:01:54,941 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 01:01:54,941 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 01:01:54,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 01:01:54,942 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 01:01:54,942 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 01:01:54,942 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf51dd0-a167-49dd-9663-6db01d607682/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf51dd0-a167-49dd-9663-6db01d607682/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ff2f22c8c94593047c07aca289bcba7e507bc3ee948a7529dc94c8d7792bd95d [2022-11-26 01:01:55,282 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 01:01:55,321 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 01:01:55,325 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 01:01:55,328 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 01:01:55,328 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 01:01:55,330 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf51dd0-a167-49dd-9663-6db01d607682/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/loops/n.c24.i [2022-11-26 01:01:59,147 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 01:01:59,450 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 01:01:59,451 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf51dd0-a167-49dd-9663-6db01d607682/sv-benchmarks/c/loops/n.c24.i [2022-11-26 01:01:59,461 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf51dd0-a167-49dd-9663-6db01d607682/bin/utaipan-ByfvJB40ur/data/c485e972c/bd245412c0244bc289c832d2db487908/FLAGce467eca5 [2022-11-26 01:01:59,481 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf51dd0-a167-49dd-9663-6db01d607682/bin/utaipan-ByfvJB40ur/data/c485e972c/bd245412c0244bc289c832d2db487908 [2022-11-26 01:01:59,484 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 01:01:59,486 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 01:01:59,488 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 01:01:59,488 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 01:01:59,493 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 01:01:59,494 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:01:59" (1/1) ... [2022-11-26 01:01:59,496 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33aef5d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:59, skipping insertion in model container [2022-11-26 01:01:59,496 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:01:59" (1/1) ... [2022-11-26 01:01:59,507 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 01:01:59,552 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 01:01:59,758 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf51dd0-a167-49dd-9663-6db01d607682/sv-benchmarks/c/loops/n.c24.i[805,818] [2022-11-26 01:01:59,861 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:01:59,877 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 01:01:59,896 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf51dd0-a167-49dd-9663-6db01d607682/sv-benchmarks/c/loops/n.c24.i[805,818] [2022-11-26 01:01:59,920 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:01:59,947 INFO L208 MainTranslator]: Completed translation [2022-11-26 01:01:59,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:59 WrapperNode [2022-11-26 01:01:59,948 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 01:01:59,949 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 01:01:59,950 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 01:01:59,950 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 01:01:59,961 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:59" (1/1) ... [2022-11-26 01:01:59,976 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:59" (1/1) ... [2022-11-26 01:02:00,007 INFO L138 Inliner]: procedures = 68, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 154 [2022-11-26 01:02:00,008 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 01:02:00,009 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 01:02:00,009 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 01:02:00,009 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 01:02:00,022 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:59" (1/1) ... [2022-11-26 01:02:00,022 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:59" (1/1) ... [2022-11-26 01:02:00,026 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:59" (1/1) ... [2022-11-26 01:02:00,027 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:59" (1/1) ... [2022-11-26 01:02:00,036 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:59" (1/1) ... [2022-11-26 01:02:00,042 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:59" (1/1) ... [2022-11-26 01:02:00,047 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:59" (1/1) ... [2022-11-26 01:02:00,049 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:59" (1/1) ... [2022-11-26 01:02:00,065 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 01:02:00,066 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 01:02:00,067 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 01:02:00,067 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 01:02:00,068 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:59" (1/1) ... [2022-11-26 01:02:00,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:02:00,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf51dd0-a167-49dd-9663-6db01d607682/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:02:00,142 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf51dd0-a167-49dd-9663-6db01d607682/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 01:02:00,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf51dd0-a167-49dd-9663-6db01d607682/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 01:02:00,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 01:02:00,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-26 01:02:00,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-26 01:02:00,218 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-26 01:02:00,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 01:02:00,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-26 01:02:00,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 01:02:00,219 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-26 01:02:00,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 01:02:00,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 01:02:00,335 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 01:02:00,338 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 01:02:00,702 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 01:02:00,820 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 01:02:00,824 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-26 01:02:00,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:02:00 BoogieIcfgContainer [2022-11-26 01:02:00,841 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 01:02:00,844 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 01:02:00,847 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 01:02:00,852 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 01:02:00,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 01:01:59" (1/3) ... [2022-11-26 01:02:00,856 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60309d76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 01:02:00, skipping insertion in model container [2022-11-26 01:02:00,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:01:59" (2/3) ... [2022-11-26 01:02:00,858 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60309d76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 01:02:00, skipping insertion in model container [2022-11-26 01:02:00,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:02:00" (3/3) ... [2022-11-26 01:02:00,865 INFO L112 eAbstractionObserver]: Analyzing ICFG n.c24.i [2022-11-26 01:02:00,892 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 01:02:00,893 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 01:02:00,986 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 01:02:00,999 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@48735806, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 01:02:01,000 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 01:02:01,006 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.7) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:02:01,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-26 01:02:01,014 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:02:01,015 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-26 01:02:01,017 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:02:01,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:02:01,027 INFO L85 PathProgramCache]: Analyzing trace with hash 155056323, now seen corresponding path program 1 times [2022-11-26 01:02:01,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:02:01,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743877535] [2022-11-26 01:02:01,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:01,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:02:01,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:01,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:02:01,442 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:02:01,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743877535] [2022-11-26 01:02:01,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743877535] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:02:01,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:02:01,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 01:02:01,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016191057] [2022-11-26 01:02:01,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:02:01,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:02:01,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:02:01,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:02:01,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:02:01,532 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.7) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:02:01,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:02:01,622 INFO L93 Difference]: Finished difference Result 59 states and 93 transitions. [2022-11-26 01:02:01,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:02:01,626 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-26 01:02:01,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:02:01,636 INFO L225 Difference]: With dead ends: 59 [2022-11-26 01:02:01,636 INFO L226 Difference]: Without dead ends: 34 [2022-11-26 01:02:01,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:02:01,645 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 23 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:02:01,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 40 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:02:01,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-26 01:02:01,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 21. [2022-11-26 01:02:01,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:02:01,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 28 transitions. [2022-11-26 01:02:01,691 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 28 transitions. Word has length 5 [2022-11-26 01:02:01,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:02:01,692 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 28 transitions. [2022-11-26 01:02:01,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:02:01,692 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 28 transitions. [2022-11-26 01:02:01,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-26 01:02:01,693 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:02:01,694 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:02:01,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 01:02:01,703 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:02:01,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:02:01,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1526546639, now seen corresponding path program 1 times [2022-11-26 01:02:01,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:02:01,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302911861] [2022-11-26 01:02:01,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:01,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:02:01,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:01,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:02:01,902 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:02:01,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302911861] [2022-11-26 01:02:01,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302911861] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:02:01,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114474005] [2022-11-26 01:02:01,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:01,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:01,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf51dd0-a167-49dd-9663-6db01d607682/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:02:01,909 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf51dd0-a167-49dd-9663-6db01d607682/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:02:01,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf51dd0-a167-49dd-9663-6db01d607682/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 01:02:02,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:02,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 01:02:02,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:02:02,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:02:02,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:02:02,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 01:02:02,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114474005] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:02:02,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [916478316] [2022-11-26 01:02:02,220 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-26 01:02:02,222 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:02:02,227 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:02:02,238 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:02:02,241 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:02:02,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:02,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:02,501 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-26 01:02:02,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-26 01:02:02,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:02,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:02,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-26 01:02:02,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:02,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 124 [2022-11-26 01:02:03,248 INFO L321 Elim1Store]: treesize reduction 550, result has 11.4 percent of original size [2022-11-26 01:02:03,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 29 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 20 case distinctions, treesize of input 380 treesize of output 369 [2022-11-26 01:02:03,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2022-11-26 01:02:03,793 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:02:04,436 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '207#(and (= (ite (and (<= 0 |ULTIMATE.start_main_~offset~0#1|) (<= |ULTIMATE.start_main_~offset~0#1| 1000)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 1000 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~#tel_data~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#tel_data~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#tel_data~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-26 01:02:04,436 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:02:04,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:02:04,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-26 01:02:04,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040102422] [2022-11-26 01:02:04,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:02:04,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 01:02:04,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:02:04,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 01:02:04,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-11-26 01:02:04,440 INFO L87 Difference]: Start difference. First operand 21 states and 28 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:02:04,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:02:04,638 INFO L93 Difference]: Finished difference Result 84 states and 121 transitions. [2022-11-26 01:02:04,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 01:02:04,639 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-26 01:02:04,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:02:04,642 INFO L225 Difference]: With dead ends: 84 [2022-11-26 01:02:04,643 INFO L226 Difference]: Without dead ends: 66 [2022-11-26 01:02:04,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-11-26 01:02:04,647 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 95 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:02:04,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 73 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:02:04,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-26 01:02:04,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-11-26 01:02:04,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.4) internal successors, (91), 65 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:02:04,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 91 transitions. [2022-11-26 01:02:04,668 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 91 transitions. Word has length 10 [2022-11-26 01:02:04,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:02:04,669 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 91 transitions. [2022-11-26 01:02:04,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:02:04,669 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 91 transitions. [2022-11-26 01:02:04,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-26 01:02:04,671 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:02:04,671 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2022-11-26 01:02:04,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf51dd0-a167-49dd-9663-6db01d607682/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 01:02:04,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf51dd0-a167-49dd-9663-6db01d607682/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:04,878 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:02:04,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:02:04,879 INFO L85 PathProgramCache]: Analyzing trace with hash 106849547, now seen corresponding path program 2 times [2022-11-26 01:02:04,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:02:04,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074758354] [2022-11-26 01:02:04,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:04,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:02:04,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:05,273 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-26 01:02:05,274 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:02:05,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074758354] [2022-11-26 01:02:05,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074758354] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:02:05,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:02:05,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 01:02:05,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533116887] [2022-11-26 01:02:05,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:02:05,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 01:02:05,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:02:05,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 01:02:05,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 01:02:05,276 INFO L87 Difference]: Start difference. First operand 66 states and 91 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:02:05,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:02:05,346 INFO L93 Difference]: Finished difference Result 123 states and 172 transitions. [2022-11-26 01:02:05,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 01:02:05,346 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-26 01:02:05,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:02:05,348 INFO L225 Difference]: With dead ends: 123 [2022-11-26 01:02:05,348 INFO L226 Difference]: Without dead ends: 120 [2022-11-26 01:02:05,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 01:02:05,350 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 18 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:02:05,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 55 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 01:02:05,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-11-26 01:02:05,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 67. [2022-11-26 01:02:05,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.4090909090909092) internal successors, (93), 66 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:02:05,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 93 transitions. [2022-11-26 01:02:05,365 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 93 transitions. Word has length 25 [2022-11-26 01:02:05,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:02:05,366 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 93 transitions. [2022-11-26 01:02:05,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:02:05,366 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 93 transitions. [2022-11-26 01:02:05,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-26 01:02:05,367 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:02:05,368 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:02:05,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-26 01:02:05,368 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:02:05,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:02:05,369 INFO L85 PathProgramCache]: Analyzing trace with hash -2138311154, now seen corresponding path program 1 times [2022-11-26 01:02:05,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:02:05,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136716074] [2022-11-26 01:02:05,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:05,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:02:05,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:05,580 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-26 01:02:05,580 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:02:05,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136716074] [2022-11-26 01:02:05,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136716074] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:02:05,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750633953] [2022-11-26 01:02:05,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:05,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:05,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf51dd0-a167-49dd-9663-6db01d607682/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:02:05,583 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf51dd0-a167-49dd-9663-6db01d607682/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:02:05,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf51dd0-a167-49dd-9663-6db01d607682/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 01:02:05,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:05,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 01:02:05,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:02:05,748 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-26 01:02:05,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:02:05,824 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-26 01:02:05,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750633953] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:02:05,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1774194586] [2022-11-26 01:02:05,828 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-26 01:02:05,828 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:02:05,828 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:02:05,829 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:02:05,829 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:02:05,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:05,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:05,925 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-26 01:02:05,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-26 01:02:05,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:05,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:05,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-26 01:02:06,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:06,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 121 [2022-11-26 01:02:06,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:02:06,372 INFO L321 Elim1Store]: treesize reduction 451, result has 15.4 percent of original size [2022-11-26 01:02:06,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 28 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 21 case distinctions, treesize of input 377 treesize of output 370 [2022-11-26 01:02:06,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2022-11-26 01:02:06,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:02:06,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-26 01:02:06,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:02:06,844 INFO L321 Elim1Store]: treesize reduction 29, result has 9.4 percent of original size [2022-11-26 01:02:06,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 140 treesize of output 115 [2022-11-26 01:02:07,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:02:07,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:02:07,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-26 01:02:07,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:02:07,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:02:07,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-26 01:02:07,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:02:07,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:02:07,900 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:02:09,014 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '913#(and (= (ite (and (<= 0 |ULTIMATE.start_main_~offset~0#1|) (<= |ULTIMATE.start_main_~offset~0#1| 1000)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 1000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#tel_data~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#tel_data~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 01:02:09,015 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:02:09,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:02:09,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-26 01:02:09,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614196083] [2022-11-26 01:02:09,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:02:09,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-26 01:02:09,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:02:09,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-26 01:02:09,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2022-11-26 01:02:09,018 INFO L87 Difference]: Start difference. First operand 67 states and 93 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:02:09,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:02:09,335 INFO L93 Difference]: Finished difference Result 231 states and 336 transitions. [2022-11-26 01:02:09,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-26 01:02:09,335 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-26 01:02:09,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:02:09,338 INFO L225 Difference]: With dead ends: 231 [2022-11-26 01:02:09,339 INFO L226 Difference]: Without dead ends: 170 [2022-11-26 01:02:09,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2022-11-26 01:02:09,340 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 342 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:02:09,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 153 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 01:02:09,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-11-26 01:02:09,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 157. [2022-11-26 01:02:09,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.4038461538461537) internal successors, (219), 156 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:02:09,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 219 transitions. [2022-11-26 01:02:09,376 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 219 transitions. Word has length 29 [2022-11-26 01:02:09,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:02:09,377 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 219 transitions. [2022-11-26 01:02:09,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:02:09,378 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 219 transitions. [2022-11-26 01:02:09,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-26 01:02:09,381 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:02:09,382 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:02:09,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf51dd0-a167-49dd-9663-6db01d607682/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 01:02:09,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf51dd0-a167-49dd-9663-6db01d607682/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:09,589 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:02:09,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:02:09,590 INFO L85 PathProgramCache]: Analyzing trace with hash -322976646, now seen corresponding path program 2 times [2022-11-26 01:02:09,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:02:09,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605345316] [2022-11-26 01:02:09,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:09,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:02:09,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:10,090 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-11-26 01:02:10,091 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:02:10,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605345316] [2022-11-26 01:02:10,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605345316] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:02:10,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724587536] [2022-11-26 01:02:10,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 01:02:10,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:10,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf51dd0-a167-49dd-9663-6db01d607682/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:02:10,094 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf51dd0-a167-49dd-9663-6db01d607682/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:02:10,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf51dd0-a167-49dd-9663-6db01d607682/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 01:02:10,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 01:02:10,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:02:10,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-26 01:02:10,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:02:10,355 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 28 proven. 1 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2022-11-26 01:02:10,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:02:10,562 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 28 proven. 1 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2022-11-26 01:02:10,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724587536] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:02:10,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1522540606] [2022-11-26 01:02:10,566 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-26 01:02:10,566 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:02:10,566 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:02:10,567 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:02:10,567 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:02:10,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:10,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:10,658 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-26 01:02:10,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 38 [2022-11-26 01:02:10,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:10,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:10,733 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-26 01:02:10,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-26 01:02:10,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:10,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 121 [2022-11-26 01:02:10,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:02:11,143 INFO L321 Elim1Store]: treesize reduction 451, result has 15.4 percent of original size [2022-11-26 01:02:11,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 28 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 21 case distinctions, treesize of input 377 treesize of output 370 [2022-11-26 01:02:11,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2022-11-26 01:02:11,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:02:11,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-26 01:02:11,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:02:11,561 INFO L321 Elim1Store]: treesize reduction 29, result has 9.4 percent of original size [2022-11-26 01:02:11,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 140 treesize of output 115 [2022-11-26 01:02:11,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:02:11,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:02:11,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-26 01:02:12,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:02:12,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:02:12,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-26 01:02:12,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:02:12,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:02:12,404 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:02:13,695 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1888#(and (= (ite (and (<= 0 |ULTIMATE.start_main_~offset~0#1|) (<= |ULTIMATE.start_main_~offset~0#1| 1000)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 1000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#tel_data~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#tel_data~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 01:02:13,695 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:02:13,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:02:13,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 6] total 21 [2022-11-26 01:02:13,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83394409] [2022-11-26 01:02:13,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:02:13,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-26 01:02:13,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:02:13,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-26 01:02:13,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2022-11-26 01:02:13,698 INFO L87 Difference]: Start difference. First operand 157 states and 219 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:02:17,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:02:17,271 INFO L93 Difference]: Finished difference Result 850 states and 1220 transitions. [2022-11-26 01:02:17,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-11-26 01:02:17,272 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-11-26 01:02:17,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:02:17,277 INFO L225 Difference]: With dead ends: 850 [2022-11-26 01:02:17,278 INFO L226 Difference]: Without dead ends: 702 [2022-11-26 01:02:17,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3326 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2165, Invalid=7735, Unknown=0, NotChecked=0, Total=9900 [2022-11-26 01:02:17,284 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 4177 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4177 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-26 01:02:17,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4177 Valid, 225 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-26 01:02:17,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2022-11-26 01:02:17,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 205. [2022-11-26 01:02:17,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.4264705882352942) internal successors, (291), 204 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:02:17,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 291 transitions. [2022-11-26 01:02:17,340 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 291 transitions. Word has length 59 [2022-11-26 01:02:17,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:02:17,340 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 291 transitions. [2022-11-26 01:02:17,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:02:17,341 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 291 transitions. [2022-11-26 01:02:17,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-26 01:02:17,344 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:02:17,344 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2022-11-26 01:02:17,354 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf51dd0-a167-49dd-9663-6db01d607682/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-26 01:02:17,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf51dd0-a167-49dd-9663-6db01d607682/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:17,552 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:02:17,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:02:17,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1548030479, now seen corresponding path program 3 times [2022-11-26 01:02:17,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:02:17,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889637171] [2022-11-26 01:02:17,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:17,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:02:17,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:18,005 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2022-11-26 01:02:18,006 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:02:18,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889637171] [2022-11-26 01:02:18,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889637171] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:02:18,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698888143] [2022-11-26 01:02:18,007 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 01:02:18,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:18,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf51dd0-a167-49dd-9663-6db01d607682/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:02:18,009 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf51dd0-a167-49dd-9663-6db01d607682/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:02:18,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf51dd0-a167-49dd-9663-6db01d607682/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 01:02:18,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 01:02:18,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:02:18,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-26 01:02:18,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:02:18,397 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 271 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-11-26 01:02:18,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:02:18,864 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 271 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-11-26 01:02:18,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698888143] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:02:18,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [35282891] [2022-11-26 01:02:18,867 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-26 01:02:18,868 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:02:18,868 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:02:18,868 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:02:18,869 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:02:18,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:18,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:18,952 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-26 01:02:18,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-26 01:02:18,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:18,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:18,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-26 01:02:19,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:19,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 121 [2022-11-26 01:02:19,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:02:19,424 INFO L321 Elim1Store]: treesize reduction 451, result has 15.4 percent of original size [2022-11-26 01:02:19,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 28 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 21 case distinctions, treesize of input 377 treesize of output 370 [2022-11-26 01:02:19,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2022-11-26 01:02:19,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:02:19,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-26 01:02:19,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:02:19,806 INFO L321 Elim1Store]: treesize reduction 29, result has 9.4 percent of original size [2022-11-26 01:02:19,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 137 treesize of output 112 [2022-11-26 01:02:19,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:02:20,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:02:20,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-26 01:02:20,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:02:20,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:02:20,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-26 01:02:20,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:02:20,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:02:20,635 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:02:22,109 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4152#(and (= (ite (and (<= 0 |ULTIMATE.start_main_~offset~0#1|) (<= |ULTIMATE.start_main_~offset~0#1| 1000)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 1000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#tel_data~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#tel_data~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 01:02:22,109 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:02:22,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:02:22,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 27 [2022-11-26 01:02:22,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298807631] [2022-11-26 01:02:22,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:02:22,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-26 01:02:22,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:02:22,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-26 01:02:22,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=877, Unknown=0, NotChecked=0, Total=1260 [2022-11-26 01:02:22,113 INFO L87 Difference]: Start difference. First operand 205 states and 291 transitions. Second operand has 27 states, 27 states have (on average 4.666666666666667) internal successors, (126), 27 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:02:22,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:02:22,737 INFO L93 Difference]: Finished difference Result 1048 states and 1570 transitions. [2022-11-26 01:02:22,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-26 01:02:22,738 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.666666666666667) internal successors, (126), 27 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-11-26 01:02:22,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:02:22,743 INFO L225 Difference]: With dead ends: 1048 [2022-11-26 01:02:22,743 INFO L226 Difference]: Without dead ends: 856 [2022-11-26 01:02:22,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 193 SyntacticMatches, 12 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=383, Invalid=877, Unknown=0, NotChecked=0, Total=1260 [2022-11-26 01:02:22,752 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1285 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1285 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 01:02:22,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1285 Valid, 318 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 01:02:22,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2022-11-26 01:02:22,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 400. [2022-11-26 01:02:22,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 1.413533834586466) internal successors, (564), 399 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:02:22,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 564 transitions. [2022-11-26 01:02:22,891 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 564 transitions. Word has length 76 [2022-11-26 01:02:22,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:02:22,893 INFO L495 AbstractCegarLoop]: Abstraction has 400 states and 564 transitions. [2022-11-26 01:02:22,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.666666666666667) internal successors, (126), 27 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:02:22,894 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 564 transitions. [2022-11-26 01:02:22,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-26 01:02:22,910 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:02:22,910 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 24, 24, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2022-11-26 01:02:22,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf51dd0-a167-49dd-9663-6db01d607682/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 01:02:23,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf51dd0-a167-49dd-9663-6db01d607682/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-26 01:02:23,111 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:02:23,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:02:23,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1224299137, now seen corresponding path program 4 times [2022-11-26 01:02:23,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:02:23,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203164836] [2022-11-26 01:02:23,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:23,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:02:23,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:24,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1548 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1248 trivial. 0 not checked. [2022-11-26 01:02:24,625 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:02:24,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203164836] [2022-11-26 01:02:24,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203164836] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:02:24,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399043646] [2022-11-26 01:02:24,626 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 01:02:24,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:24,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf51dd0-a167-49dd-9663-6db01d607682/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:02:24,629 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf51dd0-a167-49dd-9663-6db01d607682/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:02:24,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf51dd0-a167-49dd-9663-6db01d607682/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 01:02:24,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:24,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 806 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-26 01:02:24,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:02:24,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1548 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1248 trivial. 0 not checked. [2022-11-26 01:02:24,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:02:26,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1548 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1248 trivial. 0 not checked. [2022-11-26 01:02:26,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399043646] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:02:26,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2041066325] [2022-11-26 01:02:26,173 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-26 01:02:26,173 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:02:26,173 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:02:26,174 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:02:26,174 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:02:26,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:26,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:26,251 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-26 01:02:26,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-26 01:02:26,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:26,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:26,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-26 01:02:26,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:26,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 121 [2022-11-26 01:02:26,458 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:02:26,628 INFO L321 Elim1Store]: treesize reduction 451, result has 15.4 percent of original size [2022-11-26 01:02:26,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 28 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 21 case distinctions, treesize of input 377 treesize of output 370 [2022-11-26 01:02:26,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2022-11-26 01:02:26,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:02:26,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-26 01:02:26,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:02:26,969 INFO L321 Elim1Store]: treesize reduction 29, result has 9.4 percent of original size [2022-11-26 01:02:26,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 140 treesize of output 115 [2022-11-26 01:02:27,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:02:27,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:02:27,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-26 01:02:27,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:02:27,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:02:27,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-26 01:02:27,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:02:27,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:02:27,862 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:02:29,801 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7286#(and (= (ite (and (<= 0 |ULTIMATE.start_main_~offset~0#1|) (<= |ULTIMATE.start_main_~offset~0#1| 1000)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 1000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#tel_data~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#tel_data~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 01:02:29,802 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:02:29,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:02:29,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 52 [2022-11-26 01:02:29,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315585669] [2022-11-26 01:02:29,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:02:29,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-26 01:02:29,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:02:29,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-26 01:02:29,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1410, Invalid=2372, Unknown=0, NotChecked=0, Total=3782 [2022-11-26 01:02:29,808 INFO L87 Difference]: Start difference. First operand 400 states and 564 transitions. Second operand has 53 states, 53 states have (on average 1.2264150943396226) internal successors, (65), 52 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:02:31,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:02:31,821 INFO L93 Difference]: Finished difference Result 2075 states and 3104 transitions. [2022-11-26 01:02:31,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-26 01:02:31,827 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.2264150943396226) internal successors, (65), 52 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2022-11-26 01:02:31,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:02:31,835 INFO L225 Difference]: With dead ends: 2075 [2022-11-26 01:02:31,835 INFO L226 Difference]: Without dead ends: 1701 [2022-11-26 01:02:31,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 362 SyntacticMatches, 25 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2786 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1410, Invalid=2372, Unknown=0, NotChecked=0, Total=3782 [2022-11-26 01:02:31,839 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 3420 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3420 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-26 01:02:31,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3420 Valid, 673 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-26 01:02:31,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1701 states. [2022-11-26 01:02:31,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1701 to 790. [2022-11-26 01:02:31,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 790 states, 789 states have (on average 1.4068441064638784) internal successors, (1110), 789 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:02:31,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 790 states to 790 states and 1110 transitions. [2022-11-26 01:02:31,985 INFO L78 Accepts]: Start accepts. Automaton has 790 states and 1110 transitions. Word has length 141 [2022-11-26 01:02:31,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:02:31,985 INFO L495 AbstractCegarLoop]: Abstraction has 790 states and 1110 transitions. [2022-11-26 01:02:31,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.2264150943396226) internal successors, (65), 52 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:02:31,986 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states and 1110 transitions. [2022-11-26 01:02:31,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2022-11-26 01:02:31,989 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:02:31,990 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 50, 50, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2022-11-26 01:02:32,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf51dd0-a167-49dd-9663-6db01d607682/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 01:02:32,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf51dd0-a167-49dd-9663-6db01d607682/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:32,198 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:02:32,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:02:32,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1747851091, now seen corresponding path program 5 times [2022-11-26 01:02:32,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:02:32,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314865353] [2022-11-26 01:02:32,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:32,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:02:32,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:36,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6449 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 5174 trivial. 0 not checked. [2022-11-26 01:02:36,994 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:02:36,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314865353] [2022-11-26 01:02:36,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314865353] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:02:36,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786088473] [2022-11-26 01:02:36,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 01:02:36,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:36,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf51dd0-a167-49dd-9663-6db01d607682/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:02:36,998 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf51dd0-a167-49dd-9663-6db01d607682/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:02:37,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf51dd0-a167-49dd-9663-6db01d607682/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 01:02:37,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-26 01:02:37,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:02:37,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-26 01:02:37,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:02:37,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6449 backedges. 295 proven. 28 refuted. 0 times theorem prover too weak. 6126 trivial. 0 not checked. [2022-11-26 01:02:37,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:02:38,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6449 backedges. 295 proven. 28 refuted. 0 times theorem prover too weak. 6126 trivial. 0 not checked. [2022-11-26 01:02:38,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786088473] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:02:38,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1828011106] [2022-11-26 01:02:38,378 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-26 01:02:38,378 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:02:38,378 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:02:38,379 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:02:38,379 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:02:38,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:38,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:38,452 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-26 01:02:38,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-26 01:02:38,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:38,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:38,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-26 01:02:38,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:38,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 124 [2022-11-26 01:02:38,782 INFO L321 Elim1Store]: treesize reduction 550, result has 11.4 percent of original size [2022-11-26 01:02:38,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 29 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 20 case distinctions, treesize of input 380 treesize of output 369 [2022-11-26 01:02:38,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2022-11-26 01:02:38,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:02:38,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-26 01:02:39,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:02:39,049 INFO L321 Elim1Store]: treesize reduction 29, result has 9.4 percent of original size [2022-11-26 01:02:39,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 140 treesize of output 115 [2022-11-26 01:02:39,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:02:39,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:02:39,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-26 01:02:39,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:02:39,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:02:39,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-26 01:02:39,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:02:39,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:02:39,725 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:02:41,115 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13398#(and (= (ite (and (<= 0 |ULTIMATE.start_main_~offset~0#1|) (<= |ULTIMATE.start_main_~offset~0#1| 1000)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 1000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#tel_data~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#tel_data~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 01:02:41,115 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:02:41,115 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:02:41,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 9, 9] total 67 [2022-11-26 01:02:41,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272449172] [2022-11-26 01:02:41,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:02:41,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-11-26 01:02:41,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:02:41,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-11-26 01:02:41,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1486, Invalid=4214, Unknown=0, NotChecked=0, Total=5700 [2022-11-26 01:02:41,122 INFO L87 Difference]: Start difference. First operand 790 states and 1110 transitions. Second operand has 67 states, 67 states have (on average 1.6417910447761195) internal successors, (110), 67 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:05:26,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:05:26,351 INFO L93 Difference]: Finished difference Result 7850 states and 11356 transitions. [2022-11-26 01:05:26,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 834 states. [2022-11-26 01:05:26,351 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.6417910447761195) internal successors, (110), 67 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 271 [2022-11-26 01:05:26,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:05:26,384 INFO L225 Difference]: With dead ends: 7850 [2022-11-26 01:05:26,384 INFO L226 Difference]: Without dead ends: 7106 [2022-11-26 01:05:26,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1945 GetRequests, 1096 SyntacticMatches, 0 SemanticMatches, 849 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329851 ImplicationChecksByTransitivity, 125.8s TimeCoverageRelationStatistics Valid=169270, Invalid=554080, Unknown=0, NotChecked=0, Total=723350 [2022-11-26 01:05:26,448 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 55205 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 2894 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55205 SdHoareTripleChecker+Valid, 783 SdHoareTripleChecker+Invalid, 3513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2894 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-26 01:05:26,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55205 Valid, 783 Invalid, 3513 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2894 Valid, 619 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-26 01:05:26,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7106 states. [2022-11-26 01:05:26,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7106 to 871. [2022-11-26 01:05:26,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 1.4172413793103449) internal successors, (1233), 870 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:05:26,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 1233 transitions. [2022-11-26 01:05:26,732 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 1233 transitions. Word has length 271 [2022-11-26 01:05:26,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:05:26,732 INFO L495 AbstractCegarLoop]: Abstraction has 871 states and 1233 transitions. [2022-11-26 01:05:26,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.6417910447761195) internal successors, (110), 67 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:05:26,733 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 1233 transitions. [2022-11-26 01:05:26,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2022-11-26 01:05:26,738 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:05:26,738 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 51, 51, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2022-11-26 01:05:26,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf51dd0-a167-49dd-9663-6db01d607682/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 01:05:26,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf51dd0-a167-49dd-9663-6db01d607682/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:05:26,947 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:05:26,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:05:26,948 INFO L85 PathProgramCache]: Analyzing trace with hash -957412781, now seen corresponding path program 6 times [2022-11-26 01:05:26,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:05:26,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851194620] [2022-11-26 01:05:26,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:26,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:05:27,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:31,734 INFO L134 CoverageAnalysis]: Checked inductivity of 7167 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 5841 trivial. 0 not checked. [2022-11-26 01:05:31,735 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:05:31,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851194620] [2022-11-26 01:05:31,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851194620] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:05:31,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313403438] [2022-11-26 01:05:31,735 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 01:05:31,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:05:31,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf51dd0-a167-49dd-9663-6db01d607682/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:05:31,737 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf51dd0-a167-49dd-9663-6db01d607682/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:05:31,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf51dd0-a167-49dd-9663-6db01d607682/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 01:05:32,146 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 01:05:32,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:05:32,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 1670 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-26 01:05:32,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:05:32,573 INFO L134 CoverageAnalysis]: Checked inductivity of 7167 backedges. 0 proven. 5651 refuted. 0 times theorem prover too weak. 1516 trivial. 0 not checked. [2022-11-26 01:05:32,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:05:36,971 INFO L134 CoverageAnalysis]: Checked inductivity of 7167 backedges. 0 proven. 5651 refuted. 0 times theorem prover too weak. 1516 trivial. 0 not checked. [2022-11-26 01:05:36,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313403438] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:05:36,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1134458684] [2022-11-26 01:05:36,973 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-26 01:05:36,973 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:05:36,974 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:05:36,974 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:05:36,974 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:05:37,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:37,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:37,040 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-26 01:05:37,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 38 [2022-11-26 01:05:37,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:37,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:37,099 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-26 01:05:37,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-26 01:05:37,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:37,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 124 [2022-11-26 01:05:37,418 INFO L321 Elim1Store]: treesize reduction 550, result has 11.4 percent of original size [2022-11-26 01:05:37,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 29 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 20 case distinctions, treesize of input 380 treesize of output 369 [2022-11-26 01:05:37,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2022-11-26 01:05:37,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:05:37,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-26 01:05:37,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:05:37,668 INFO L321 Elim1Store]: treesize reduction 29, result has 9.4 percent of original size [2022-11-26 01:05:37,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 140 treesize of output 115 [2022-11-26 01:05:37,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:05:37,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:05:38,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-26 01:05:38,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:05:38,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:05:38,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-26 01:05:38,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:05:38,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:05:38,412 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:05:39,856 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '30507#(and (= (ite (and (<= 0 |ULTIMATE.start_main_~offset~0#1|) (<= |ULTIMATE.start_main_~offset~0#1| 1000)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 1000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#tel_data~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#tel_data~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 01:05:39,856 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:05:39,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:05:39,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 54, 54] total 107 [2022-11-26 01:05:39,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365356672] [2022-11-26 01:05:39,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:05:39,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-11-26 01:05:39,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:05:39,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-11-26 01:05:39,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5703, Invalid=7637, Unknown=0, NotChecked=0, Total=13340 [2022-11-26 01:05:39,874 INFO L87 Difference]: Start difference. First operand 871 states and 1233 transitions. Second operand has 107 states, 107 states have (on average 4.542056074766355) internal successors, (486), 107 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:05:52,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:05:52,004 INFO L93 Difference]: Finished difference Result 7838 states and 11900 transitions. [2022-11-26 01:05:52,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-11-26 01:05:52,005 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 4.542056074766355) internal successors, (486), 107 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 300 [2022-11-26 01:05:52,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:05:52,023 INFO L225 Difference]: With dead ends: 7838 [2022-11-26 01:05:52,023 INFO L226 Difference]: Without dead ends: 7020 [2022-11-26 01:05:52,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 951 GetRequests, 837 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1625 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=5703, Invalid=7637, Unknown=0, NotChecked=0, Total=13340 [2022-11-26 01:05:52,029 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 7829 mSDsluCounter, 1358 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7829 SdHoareTripleChecker+Valid, 1373 SdHoareTripleChecker+Invalid, 1165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-26 01:05:52,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7829 Valid, 1373 Invalid, 1165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 848 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-26 01:05:52,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7020 states. [2022-11-26 01:05:52,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7020 to 1666. [2022-11-26 01:05:52,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1666 states, 1665 states have (on average 1.409009009009009) internal successors, (2346), 1665 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:05:52,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 2346 transitions. [2022-11-26 01:05:52,591 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 2346 transitions. Word has length 300 [2022-11-26 01:05:52,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:05:52,592 INFO L495 AbstractCegarLoop]: Abstraction has 1666 states and 2346 transitions. [2022-11-26 01:05:52,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 4.542056074766355) internal successors, (486), 107 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:05:52,593 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 2346 transitions. [2022-11-26 01:05:52,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 566 [2022-11-26 01:05:52,611 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:05:52,611 INFO L195 NwaCegarLoop]: trace histogram [104, 104, 104, 104, 104, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2022-11-26 01:05:52,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf51dd0-a167-49dd-9663-6db01d607682/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 01:05:52,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf51dd0-a167-49dd-9663-6db01d607682/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:05:52,822 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:05:52,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:05:52,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1727631025, now seen corresponding path program 7 times [2022-11-26 01:05:52,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:05:52,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128718108] [2022-11-26 01:05:52,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:52,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:05:53,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:06:07,113 INFO L134 CoverageAnalysis]: Checked inductivity of 28208 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 22748 trivial. 0 not checked. [2022-11-26 01:06:07,114 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:06:07,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128718108] [2022-11-26 01:06:07,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128718108] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:06:07,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213507409] [2022-11-26 01:06:07,114 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 01:06:07,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:06:07,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf51dd0-a167-49dd-9663-6db01d607682/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:06:07,117 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf51dd0-a167-49dd-9663-6db01d607682/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:06:07,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf51dd0-a167-49dd-9663-6db01d607682/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 01:06:07,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:06:07,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 3048 conjuncts, 106 conjunts are in the unsatisfiable core [2022-11-26 01:06:07,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:06:08,010 INFO L134 CoverageAnalysis]: Checked inductivity of 28208 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 22748 trivial. 0 not checked. [2022-11-26 01:06:08,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:06:21,385 INFO L134 CoverageAnalysis]: Checked inductivity of 28208 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 22748 trivial. 0 not checked. [2022-11-26 01:06:21,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213507409] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:06:21,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [430494754] [2022-11-26 01:06:21,388 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-26 01:06:21,388 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:06:21,389 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:06:21,389 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:06:21,389 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:06:21,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:21,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:21,437 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-26 01:06:21,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 38 [2022-11-26 01:06:21,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:21,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:21,493 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-26 01:06:21,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-26 01:06:21,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:21,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 124 [2022-11-26 01:06:21,753 INFO L321 Elim1Store]: treesize reduction 550, result has 11.4 percent of original size [2022-11-26 01:06:21,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 29 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 20 case distinctions, treesize of input 380 treesize of output 369 [2022-11-26 01:06:21,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2022-11-26 01:06:21,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:06:21,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-26 01:06:21,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:06:21,970 INFO L321 Elim1Store]: treesize reduction 29, result has 9.4 percent of original size [2022-11-26 01:06:21,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 140 treesize of output 115 [2022-11-26 01:06:22,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:06:22,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:06:22,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-26 01:06:22,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:06:22,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:06:22,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-26 01:06:22,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:06:22,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:06:22,490 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:06:24,072 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '48777#(and (= (ite (and (<= 0 |ULTIMATE.start_main_~offset~0#1|) (<= |ULTIMATE.start_main_~offset~0#1| 1000)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 1000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#tel_data~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#tel_data~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 01:06:24,072 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:06:24,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:06:24,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106, 106] total 212 [2022-11-26 01:06:24,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838783594] [2022-11-26 01:06:24,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:06:24,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 213 states [2022-11-26 01:06:24,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:06:24,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 213 interpolants. [2022-11-26 01:06:24,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22610, Invalid=26452, Unknown=0, NotChecked=0, Total=49062 [2022-11-26 01:06:24,089 INFO L87 Difference]: Start difference. First operand 1666 states and 2346 transitions. Second operand has 213 states, 213 states have (on average 1.056338028169014) internal successors, (225), 212 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:08:16,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:08:16,997 INFO L93 Difference]: Finished difference Result 15523 states and 23560 transitions. [2022-11-26 01:08:16,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2022-11-26 01:08:16,998 INFO L78 Accepts]: Start accepts. Automaton has has 213 states, 213 states have (on average 1.056338028169014) internal successors, (225), 212 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 565 [2022-11-26 01:08:16,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:08:17,036 INFO L225 Difference]: With dead ends: 15523 [2022-11-26 01:08:17,036 INFO L226 Difference]: Without dead ends: 13963 [2022-11-26 01:08:17,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1799 GetRequests, 1579 SyntacticMatches, 0 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3268 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=22610, Invalid=26452, Unknown=0, NotChecked=0, Total=49062 [2022-11-26 01:08:17,044 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 17803 mSDsluCounter, 2733 mSDsCounter, 0 mSdLazyCounter, 1693 mSolverCounterSat, 1045 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17803 SdHoareTripleChecker+Valid, 2748 SdHoareTripleChecker+Invalid, 2738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1045 IncrementalHoareTripleChecker+Valid, 1693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-26 01:08:17,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17803 Valid, 2748 Invalid, 2738 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1045 Valid, 1693 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-26 01:08:17,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13963 states. [2022-11-26 01:08:17,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13963 to 3256. [2022-11-26 01:08:17,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3256 states, 3255 states have (on average 1.4046082949308756) internal successors, (4572), 3255 states have internal predecessors, (4572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:08:17,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3256 states to 3256 states and 4572 transitions. [2022-11-26 01:08:17,887 INFO L78 Accepts]: Start accepts. Automaton has 3256 states and 4572 transitions. Word has length 565 [2022-11-26 01:08:17,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:08:17,887 INFO L495 AbstractCegarLoop]: Abstraction has 3256 states and 4572 transitions. [2022-11-26 01:08:17,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 213 states, 213 states have (on average 1.056338028169014) internal successors, (225), 212 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 01:08:17,888 INFO L276 IsEmpty]: Start isEmpty. Operand 3256 states and 4572 transitions. [2022-11-26 01:08:17,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1096 [2022-11-26 01:08:17,940 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:08:17,940 INFO L195 NwaCegarLoop]: trace histogram [210, 210, 210, 210, 210, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2022-11-26 01:08:17,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf51dd0-a167-49dd-9663-6db01d607682/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-26 01:08:18,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf51dd0-a167-49dd-9663-6db01d607682/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-26 01:08:18,151 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:08:18,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:08:18,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1693807141, now seen corresponding path program 8 times [2022-11-26 01:08:18,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:08:18,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044353558] [2022-11-26 01:08:18,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:08:18,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:08:19,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:09:09,743 INFO L134 CoverageAnalysis]: Checked inductivity of 112425 backedges. 0 proven. 22155 refuted. 0 times theorem prover too weak. 90270 trivial. 0 not checked. [2022-11-26 01:09:09,743 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:09:09,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044353558] [2022-11-26 01:09:09,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044353558] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:09:09,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619006111] [2022-11-26 01:09:09,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 01:09:09,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:09:09,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf51dd0-a167-49dd-9663-6db01d607682/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:09:09,750 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf51dd0-a167-49dd-9663-6db01d607682/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:09:09,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bf51dd0-a167-49dd-9663-6db01d607682/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-26 01:09:13,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-11-26 01:09:13,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:09:13,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-26 01:09:13,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:09:14,779 INFO L134 CoverageAnalysis]: Checked inductivity of 112425 backedges. 2509 proven. 190 refuted. 0 times theorem prover too weak. 109726 trivial. 0 not checked. [2022-11-26 01:09:14,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:09:17,170 INFO L134 CoverageAnalysis]: Checked inductivity of 112425 backedges. 2509 proven. 190 refuted. 0 times theorem prover too weak. 109726 trivial. 0 not checked. [2022-11-26 01:09:17,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619006111] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:09:17,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2029847159] [2022-11-26 01:09:17,173 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-26 01:09:17,173 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:09:17,173 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:09:17,174 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:09:17,174 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:09:17,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:17,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:17,234 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-26 01:09:17,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 38 [2022-11-26 01:09:17,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:17,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:17,305 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-26 01:09:17,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-26 01:09:17,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:17,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 121 [2022-11-26 01:09:17,458 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:09:17,607 INFO L321 Elim1Store]: treesize reduction 451, result has 15.4 percent of original size [2022-11-26 01:09:17,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 28 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 21 case distinctions, treesize of input 377 treesize of output 370 [2022-11-26 01:09:17,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2022-11-26 01:09:17,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:09:17,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-26 01:09:17,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:09:17,876 INFO L321 Elim1Store]: treesize reduction 29, result has 9.4 percent of original size [2022-11-26 01:09:17,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 140 treesize of output 115 [2022-11-26 01:09:18,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:09:18,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:09:18,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-26 01:09:18,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:09:18,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:09:18,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-26 01:09:18,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:09:18,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:09:18,433 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:10:06,721 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '84563#(and (= (ite (and (<= 0 |ULTIMATE.start_main_~offset~0#1|) (<= |ULTIMATE.start_main_~offset~0#1| 1000)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 1000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#tel_data~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#tel_data~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 01:10:06,721 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:10:06,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:10:06,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [212, 15, 15] total 239 [2022-11-26 01:10:06,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413926673] [2022-11-26 01:10:06,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:10:06,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 239 states [2022-11-26 01:10:06,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:10:06,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 239 interpolants. [2022-11-26 01:10:06,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22897, Invalid=38359, Unknown=0, NotChecked=0, Total=61256 [2022-11-26 01:10:06,740 INFO L87 Difference]: Start difference. First operand 3256 states and 4572 transitions. Second operand has 239 states, 239 states have (on average 1.3305439330543933) internal successors, (318), 239 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)