./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 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93badff7-00d4-4610-bd47-f373a9e2b3eb/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93badff7-00d4-4610-bd47-f373a9e2b3eb/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93badff7-00d4-4610-bd47-f373a9e2b3eb/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93badff7-00d4-4610-bd47-f373a9e2b3eb/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/n.c24.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93badff7-00d4-4610-bd47-f373a9e2b3eb/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93badff7-00d4-4610-bd47-f373a9e2b3eb/bin/utaipan-gh47qXpMRh --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-2329fc7 [2022-12-14 08:44:28,700 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 08:44:28,701 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 08:44:28,714 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 08:44:28,715 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 08:44:28,715 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 08:44:28,716 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 08:44:28,717 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 08:44:28,718 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 08:44:28,719 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 08:44:28,719 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 08:44:28,720 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 08:44:28,720 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 08:44:28,721 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 08:44:28,722 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 08:44:28,722 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 08:44:28,723 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 08:44:28,723 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 08:44:28,724 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 08:44:28,726 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 08:44:28,726 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 08:44:28,727 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 08:44:28,728 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 08:44:28,729 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 08:44:28,731 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 08:44:28,731 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 08:44:28,731 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 08:44:28,732 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 08:44:28,732 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 08:44:28,733 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 08:44:28,733 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 08:44:28,733 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 08:44:28,734 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 08:44:28,734 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 08:44:28,735 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 08:44:28,735 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 08:44:28,735 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 08:44:28,736 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 08:44:28,736 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 08:44:28,736 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 08:44:28,737 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 08:44:28,737 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93badff7-00d4-4610-bd47-f373a9e2b3eb/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 08:44:28,752 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 08:44:28,752 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 08:44:28,752 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 08:44:28,752 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 08:44:28,753 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 08:44:28,753 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 08:44:28,753 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 08:44:28,753 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 08:44:28,753 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 08:44:28,753 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 08:44:28,753 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 08:44:28,754 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 08:44:28,754 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 08:44:28,754 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 08:44:28,754 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 08:44:28,754 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 08:44:28,754 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 08:44:28,754 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 08:44:28,755 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 08:44:28,755 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 08:44:28,755 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 08:44:28,755 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 08:44:28,755 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 08:44:28,755 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 08:44:28,755 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 08:44:28,755 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 08:44:28,756 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 08:44:28,756 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 08:44:28,756 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 08:44:28,756 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 08:44:28,756 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 08:44:28,756 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 08:44:28,756 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:44:28,756 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 08:44:28,756 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 08:44:28,756 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 08:44:28,757 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 08:44:28,757 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 08:44:28,757 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 08:44:28,757 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 08:44:28,757 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 08:44:28,757 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_93badff7-00d4-4610-bd47-f373a9e2b3eb/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93badff7-00d4-4610-bd47-f373a9e2b3eb/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ff2f22c8c94593047c07aca289bcba7e507bc3ee948a7529dc94c8d7792bd95d [2022-12-14 08:44:28,921 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 08:44:28,941 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 08:44:28,943 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 08:44:28,945 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 08:44:28,945 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 08:44:28,946 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93badff7-00d4-4610-bd47-f373a9e2b3eb/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/loops/n.c24.i [2022-12-14 08:44:31,510 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 08:44:31,680 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 08:44:31,680 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93badff7-00d4-4610-bd47-f373a9e2b3eb/sv-benchmarks/c/loops/n.c24.i [2022-12-14 08:44:31,688 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93badff7-00d4-4610-bd47-f373a9e2b3eb/bin/utaipan-gh47qXpMRh/data/a42bddbb4/ee35bc050855443f870d30547cb167f4/FLAG9f55124cb [2022-12-14 08:44:32,078 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93badff7-00d4-4610-bd47-f373a9e2b3eb/bin/utaipan-gh47qXpMRh/data/a42bddbb4/ee35bc050855443f870d30547cb167f4 [2022-12-14 08:44:32,080 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 08:44:32,081 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 08:44:32,082 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 08:44:32,082 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 08:44:32,085 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 08:44:32,085 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:44:32" (1/1) ... [2022-12-14 08:44:32,086 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@255bc7d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:44:32, skipping insertion in model container [2022-12-14 08:44:32,086 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:44:32" (1/1) ... [2022-12-14 08:44:32,091 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 08:44:32,111 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 08:44:32,210 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_93badff7-00d4-4610-bd47-f373a9e2b3eb/sv-benchmarks/c/loops/n.c24.i[805,818] [2022-12-14 08:44:32,250 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:44:32,260 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 08:44:32,271 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_93badff7-00d4-4610-bd47-f373a9e2b3eb/sv-benchmarks/c/loops/n.c24.i[805,818] [2022-12-14 08:44:32,282 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:44:32,295 INFO L208 MainTranslator]: Completed translation [2022-12-14 08:44:32,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:44:32 WrapperNode [2022-12-14 08:44:32,295 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 08:44:32,296 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 08:44:32,296 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 08:44:32,296 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 08:44:32,301 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:44:32" (1/1) ... [2022-12-14 08:44:32,307 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:44:32" (1/1) ... [2022-12-14 08:44:32,321 INFO L138 Inliner]: procedures = 68, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 154 [2022-12-14 08:44:32,322 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 08:44:32,322 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 08:44:32,322 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 08:44:32,322 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 08:44:32,329 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:44:32" (1/1) ... [2022-12-14 08:44:32,329 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:44:32" (1/1) ... [2022-12-14 08:44:32,331 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:44:32" (1/1) ... [2022-12-14 08:44:32,331 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:44:32" (1/1) ... [2022-12-14 08:44:32,335 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:44:32" (1/1) ... [2022-12-14 08:44:32,338 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:44:32" (1/1) ... [2022-12-14 08:44:32,339 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:44:32" (1/1) ... [2022-12-14 08:44:32,340 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:44:32" (1/1) ... [2022-12-14 08:44:32,341 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 08:44:32,342 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 08:44:32,342 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 08:44:32,342 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 08:44:32,342 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:44:32" (1/1) ... [2022-12-14 08:44:32,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:44:32,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93badff7-00d4-4610-bd47-f373a9e2b3eb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:44:32,366 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93badff7-00d4-4610-bd47-f373a9e2b3eb/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 08:44:32,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93badff7-00d4-4610-bd47-f373a9e2b3eb/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 08:44:32,392 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 08:44:32,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-12-14 08:44:32,392 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 08:44:32,392 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 08:44:32,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 08:44:32,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 08:44:32,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 08:44:32,393 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-12-14 08:44:32,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 08:44:32,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 08:44:32,451 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 08:44:32,452 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 08:44:32,626 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 08:44:32,679 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 08:44:32,679 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-14 08:44:32,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:44:32 BoogieIcfgContainer [2022-12-14 08:44:32,682 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 08:44:32,685 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 08:44:32,685 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 08:44:32,688 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 08:44:32,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 08:44:32" (1/3) ... [2022-12-14 08:44:32,689 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d878238 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:44:32, skipping insertion in model container [2022-12-14 08:44:32,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:44:32" (2/3) ... [2022-12-14 08:44:32,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d878238 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:44:32, skipping insertion in model container [2022-12-14 08:44:32,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:44:32" (3/3) ... [2022-12-14 08:44:32,691 INFO L112 eAbstractionObserver]: Analyzing ICFG n.c24.i [2022-12-14 08:44:32,708 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 08:44:32,708 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 08:44:32,745 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 08:44:32,750 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;@d836555, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 08:44:32,750 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 08:44:32,754 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) [2022-12-14 08:44:32,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 08:44:32,759 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:44:32,760 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 08:44:32,760 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:44:32,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:44:32,764 INFO L85 PathProgramCache]: Analyzing trace with hash 155979844, now seen corresponding path program 1 times [2022-12-14 08:44:32,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:44:32,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368854525] [2022-12-14 08:44:32,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:44:32,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:44:32,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:44:32,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:44:32,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:44:32,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368854525] [2022-12-14 08:44:32,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368854525] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:44:32,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:44:32,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 08:44:32,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409856423] [2022-12-14 08:44:32,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:44:32,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:44:32,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:44:32,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:44:32,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:44:32,951 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) [2022-12-14 08:44:33,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:44:33,006 INFO L93 Difference]: Finished difference Result 59 states and 93 transitions. [2022-12-14 08:44:33,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:44:33,008 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 [2022-12-14 08:44:33,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:44:33,013 INFO L225 Difference]: With dead ends: 59 [2022-12-14 08:44:33,013 INFO L226 Difference]: Without dead ends: 34 [2022-12-14 08:44:33,015 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 [2022-12-14 08:44:33,018 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, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:44:33,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 40 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:44:33,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-12-14 08:44:33,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 21. [2022-12-14 08:44:33,040 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) [2022-12-14 08:44:33,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 28 transitions. [2022-12-14 08:44:33,041 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 28 transitions. Word has length 5 [2022-12-14 08:44:33,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:44:33,041 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 28 transitions. [2022-12-14 08:44:33,042 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) [2022-12-14 08:44:33,042 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 28 transitions. [2022-12-14 08:44:33,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 08:44:33,042 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:44:33,042 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:44:33,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 08:44:33,043 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:44:33,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:44:33,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1723060144, now seen corresponding path program 1 times [2022-12-14 08:44:33,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:44:33,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529894037] [2022-12-14 08:44:33,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:44:33,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:44:33,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:44:33,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 08:44:33,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:44:33,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529894037] [2022-12-14 08:44:33,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529894037] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:44:33,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273585436] [2022-12-14 08:44:33,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:44:33,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:44:33,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93badff7-00d4-4610-bd47-f373a9e2b3eb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:44:33,126 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93badff7-00d4-4610-bd47-f373a9e2b3eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:44:33,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93badff7-00d4-4610-bd47-f373a9e2b3eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 08:44:33,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:44:33,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 08:44:33,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:44:33,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 08:44:33,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:44:33,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 08:44:33,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273585436] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:44:33,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [744529108] [2022-12-14 08:44:33,260 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 08:44:33,261 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:44:33,263 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:44:33,267 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:44:33,267 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:44:33,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:44:33,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:44:33,391 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 08:44:33,392 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 [2022-12-14 08:44:33,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:44:33,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:44:33,418 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 [2022-12-14 08:44:33,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:44:33,481 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 [2022-12-14 08:44:33,732 INFO L321 Elim1Store]: treesize reduction 550, result has 11.4 percent of original size [2022-12-14 08:44:33,733 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 [2022-12-14 08:44:33,844 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 [2022-12-14 08:44:33,940 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:44:34,241 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 [2022-12-14 08:44:34,241 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:44:34,241 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:44:34,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-14 08:44:34,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826201600] [2022-12-14 08:44:34,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:44:34,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 08:44:34,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:44:34,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 08:44:34,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-12-14 08:44:34,244 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) [2022-12-14 08:44:34,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:44:34,313 INFO L93 Difference]: Finished difference Result 84 states and 121 transitions. [2022-12-14 08:44:34,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 08:44:34,313 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 [2022-12-14 08:44:34,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:44:34,315 INFO L225 Difference]: With dead ends: 84 [2022-12-14 08:44:34,315 INFO L226 Difference]: Without dead ends: 66 [2022-12-14 08:44:34,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-12-14 08:44:34,316 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 95 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-12-14 08:44:34,316 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] [2022-12-14 08:44:34,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-12-14 08:44:34,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-12-14 08:44:34,321 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) [2022-12-14 08:44:34,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 91 transitions. [2022-12-14 08:44:34,322 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 91 transitions. Word has length 10 [2022-12-14 08:44:34,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:44:34,322 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 91 transitions. [2022-12-14 08:44:34,322 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) [2022-12-14 08:44:34,322 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 91 transitions. [2022-12-14 08:44:34,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 08:44:34,323 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:44:34,323 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2022-12-14 08:44:34,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93badff7-00d4-4610-bd47-f373a9e2b3eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 08:44:34,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93badff7-00d4-4610-bd47-f373a9e2b3eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:44:34,524 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:44:34,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:44:34,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1970359796, now seen corresponding path program 2 times [2022-12-14 08:44:34,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:44:34,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472905697] [2022-12-14 08:44:34,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:44:34,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:44:34,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:44:34,702 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 08:44:34,703 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:44:34,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472905697] [2022-12-14 08:44:34,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472905697] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:44:34,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:44:34,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 08:44:34,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190798117] [2022-12-14 08:44:34,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:44:34,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:44:34,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:44:34,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:44:34,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:44:34,705 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) [2022-12-14 08:44:34,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:44:34,742 INFO L93 Difference]: Finished difference Result 123 states and 172 transitions. [2022-12-14 08:44:34,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:44:34,742 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 [2022-12-14 08:44:34,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:44:34,744 INFO L225 Difference]: With dead ends: 123 [2022-12-14 08:44:34,744 INFO L226 Difference]: Without dead ends: 120 [2022-12-14 08:44:34,744 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 [2022-12-14 08:44:34,745 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 [2022-12-14 08:44:34,745 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] [2022-12-14 08:44:34,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-12-14 08:44:34,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 67. [2022-12-14 08:44:34,751 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) [2022-12-14 08:44:34,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 93 transitions. [2022-12-14 08:44:34,752 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 93 transitions. Word has length 25 [2022-12-14 08:44:34,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:44:34,752 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 93 transitions. [2022-12-14 08:44:34,753 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) [2022-12-14 08:44:34,753 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 93 transitions. [2022-12-14 08:44:34,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-14 08:44:34,753 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:44:34,753 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:44:34,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 08:44:34,754 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:44:34,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:44:34,754 INFO L85 PathProgramCache]: Analyzing trace with hash -635862831, now seen corresponding path program 1 times [2022-12-14 08:44:34,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:44:34,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646654831] [2022-12-14 08:44:34,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:44:34,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:44:34,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:44:34,872 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 08:44:34,872 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:44:34,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646654831] [2022-12-14 08:44:34,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646654831] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:44:34,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745486151] [2022-12-14 08:44:34,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:44:34,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:44:34,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93badff7-00d4-4610-bd47-f373a9e2b3eb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:44:34,874 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93badff7-00d4-4610-bd47-f373a9e2b3eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:44:34,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93badff7-00d4-4610-bd47-f373a9e2b3eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 08:44:34,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:44:34,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 08:44:34,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:44:34,952 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 08:44:34,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:44:34,996 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 08:44:34,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745486151] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:44:34,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1795015447] [2022-12-14 08:44:34,998 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 08:44:34,998 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:44:34,998 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:44:34,998 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:44:34,998 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:44:35,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:44:35,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:44:35,042 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 08:44:35,043 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 [2022-12-14 08:44:35,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:44:35,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:44:35,055 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 [2022-12-14 08:44:35,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:44:35,080 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 [2022-12-14 08:44:35,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:44:35,244 INFO L321 Elim1Store]: treesize reduction 451, result has 15.4 percent of original size [2022-12-14 08:44:35,244 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 [2022-12-14 08:44:35,371 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 27 treesize of output 23 [2022-12-14 08:44:35,402 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 [2022-12-14 08:44:35,425 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 [2022-12-14 08:44:35,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:44:35,486 INFO L321 Elim1Store]: treesize reduction 29, result has 9.4 percent of original size [2022-12-14 08:44:35,486 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 [2022-12-14 08:44:35,590 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 [2022-12-14 08:44:35,664 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 [2022-12-14 08:44:35,697 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 [2022-12-14 08:44:35,748 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 [2022-12-14 08:44:35,805 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 [2022-12-14 08:44:35,851 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 [2022-12-14 08:44:35,896 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 [2022-12-14 08:44:35,945 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 [2022-12-14 08:44:35,962 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:44:36,458 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 [2022-12-14 08:44:36,458 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:44:36,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:44:36,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-14 08:44:36,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105685079] [2022-12-14 08:44:36,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:44:36,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 08:44:36,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:44:36,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 08:44:36,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2022-12-14 08:44:36,460 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) [2022-12-14 08:44:36,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:44:36,596 INFO L93 Difference]: Finished difference Result 231 states and 336 transitions. [2022-12-14 08:44:36,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 08:44:36,596 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 [2022-12-14 08:44:36,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:44:36,598 INFO L225 Difference]: With dead ends: 231 [2022-12-14 08:44:36,598 INFO L226 Difference]: Without dead ends: 170 [2022-12-14 08:44:36,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2022-12-14 08:44:36,599 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 342 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:44:36,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 153 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:44:36,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-12-14 08:44:36,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 157. [2022-12-14 08:44:36,609 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) [2022-12-14 08:44:36,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 219 transitions. [2022-12-14 08:44:36,610 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 219 transitions. Word has length 29 [2022-12-14 08:44:36,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:44:36,610 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 219 transitions. [2022-12-14 08:44:36,610 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) [2022-12-14 08:44:36,610 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 219 transitions. [2022-12-14 08:44:36,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-12-14 08:44:36,611 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:44:36,612 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:44:36,617 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93badff7-00d4-4610-bd47-f373a9e2b3eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 08:44:36,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93badff7-00d4-4610-bd47-f373a9e2b3eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:44:36,813 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:44:36,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:44:36,815 INFO L85 PathProgramCache]: Analyzing trace with hash 766719869, now seen corresponding path program 2 times [2022-12-14 08:44:36,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:44:36,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722622400] [2022-12-14 08:44:36,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:44:36,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:44:36,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:44:37,102 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-12-14 08:44:37,103 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:44:37,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722622400] [2022-12-14 08:44:37,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722622400] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:44:37,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198546391] [2022-12-14 08:44:37,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:44:37,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:44:37,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93badff7-00d4-4610-bd47-f373a9e2b3eb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:44:37,104 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93badff7-00d4-4610-bd47-f373a9e2b3eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:44:37,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93badff7-00d4-4610-bd47-f373a9e2b3eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 08:44:37,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 08:44:37,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:44:37,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 08:44:37,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:44:37,222 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 28 proven. 1 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2022-12-14 08:44:37,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:44:37,307 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 28 proven. 1 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2022-12-14 08:44:37,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198546391] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:44:37,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1009380480] [2022-12-14 08:44:37,310 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 08:44:37,310 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:44:37,310 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:44:37,310 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:44:37,310 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:44:37,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:44:37,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:44:37,348 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-14 08:44:37,348 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 [2022-12-14 08:44:37,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:44:37,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:44:37,387 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 08:44:37,388 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 [2022-12-14 08:44:37,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:44:37,413 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 [2022-12-14 08:44:37,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:44:37,570 INFO L321 Elim1Store]: treesize reduction 451, result has 15.4 percent of original size [2022-12-14 08:44:37,571 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 [2022-12-14 08:44:37,682 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 [2022-12-14 08:44:37,705 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 [2022-12-14 08:44:37,731 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 [2022-12-14 08:44:37,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:44:37,790 INFO L321 Elim1Store]: treesize reduction 29, result has 9.4 percent of original size [2022-12-14 08:44:37,791 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 [2022-12-14 08:44:37,883 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 [2022-12-14 08:44:37,941 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 [2022-12-14 08:44:37,976 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 [2022-12-14 08:44:38,007 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 [2022-12-14 08:44:38,054 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 [2022-12-14 08:44:38,091 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 [2022-12-14 08:44:38,130 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 [2022-12-14 08:44:38,173 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 [2022-12-14 08:44:38,188 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:44:38,812 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 [2022-12-14 08:44:38,812 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:44:38,812 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:44:38,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 6] total 21 [2022-12-14 08:44:38,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119254383] [2022-12-14 08:44:38,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:44:38,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 08:44:38,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:44:38,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 08:44:38,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2022-12-14 08:44:38,815 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) [2022-12-14 08:44:40,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:44:40,481 INFO L93 Difference]: Finished difference Result 850 states and 1220 transitions. [2022-12-14 08:44:40,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-12-14 08:44:40,482 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 [2022-12-14 08:44:40,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:44:40,483 INFO L225 Difference]: With dead ends: 850 [2022-12-14 08:44:40,483 INFO L226 Difference]: Without dead ends: 702 [2022-12-14 08:44:40,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3326 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2165, Invalid=7735, Unknown=0, NotChecked=0, Total=9900 [2022-12-14 08:44:40,486 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 4177 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:44:40,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4177 Valid, 225 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:44:40,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2022-12-14 08:44:40,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 205. [2022-12-14 08:44:40,509 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) [2022-12-14 08:44:40,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 291 transitions. [2022-12-14 08:44:40,510 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 291 transitions. Word has length 59 [2022-12-14 08:44:40,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:44:40,510 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 291 transitions. [2022-12-14 08:44:40,510 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) [2022-12-14 08:44:40,510 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 291 transitions. [2022-12-14 08:44:40,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-12-14 08:44:40,512 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:44:40,512 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2022-12-14 08:44:40,516 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93badff7-00d4-4610-bd47-f373a9e2b3eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 08:44:40,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93badff7-00d4-4610-bd47-f373a9e2b3eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:44:40,713 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:44:40,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:44:40,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1950682712, now seen corresponding path program 3 times [2022-12-14 08:44:40,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:44:40,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477313906] [2022-12-14 08:44:40,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:44:40,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:44:40,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:44:40,994 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2022-12-14 08:44:40,994 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:44:40,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477313906] [2022-12-14 08:44:40,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477313906] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:44:40,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557000846] [2022-12-14 08:44:40,995 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 08:44:40,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:44:40,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93badff7-00d4-4610-bd47-f373a9e2b3eb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:44:40,996 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93badff7-00d4-4610-bd47-f373a9e2b3eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:44:40,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93badff7-00d4-4610-bd47-f373a9e2b3eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 08:44:41,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 08:44:41,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:44:41,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 08:44:41,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:44:41,166 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 271 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-12-14 08:44:41,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:44:41,351 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 271 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-12-14 08:44:41,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557000846] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:44:41,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [230371846] [2022-12-14 08:44:41,353 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 08:44:41,353 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:44:41,353 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:44:41,354 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:44:41,354 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:44:41,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:44:41,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:44:41,398 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 08:44:41,399 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 [2022-12-14 08:44:41,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:44:41,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:44:41,411 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 [2022-12-14 08:44:41,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:44:41,437 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 [2022-12-14 08:44:41,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:44:41,595 INFO L321 Elim1Store]: treesize reduction 451, result has 15.4 percent of original size [2022-12-14 08:44:41,596 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 [2022-12-14 08:44:41,704 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 [2022-12-14 08:44:41,717 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 [2022-12-14 08:44:41,733 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 [2022-12-14 08:44:41,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:44:41,782 INFO L321 Elim1Store]: treesize reduction 29, result has 9.4 percent of original size [2022-12-14 08:44:41,783 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 [2022-12-14 08:44:41,868 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 [2022-12-14 08:44:41,919 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 [2022-12-14 08:44:41,953 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 [2022-12-14 08:44:41,993 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 [2022-12-14 08:44:42,057 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 [2022-12-14 08:44:42,089 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 [2022-12-14 08:44:42,130 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 [2022-12-14 08:44:42,178 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 [2022-12-14 08:44:42,193 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:44:42,798 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 [2022-12-14 08:44:42,798 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:44:42,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:44:42,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 27 [2022-12-14 08:44:42,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982365053] [2022-12-14 08:44:42,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:44:42,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 08:44:42,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:44:42,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 08:44:42,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=877, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 08:44:42,800 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) [2022-12-14 08:44:43,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:44:43,090 INFO L93 Difference]: Finished difference Result 1048 states and 1570 transitions. [2022-12-14 08:44:43,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-14 08:44:43,090 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 [2022-12-14 08:44:43,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:44:43,092 INFO L225 Difference]: With dead ends: 1048 [2022-12-14 08:44:43,092 INFO L226 Difference]: Without dead ends: 856 [2022-12-14 08:44:43,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 193 SyntacticMatches, 12 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=383, Invalid=877, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 08:44:43,094 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1285 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:44:43,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1285 Valid, 318 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:44:43,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2022-12-14 08:44:43,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 400. [2022-12-14 08:44:43,141 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) [2022-12-14 08:44:43,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 564 transitions. [2022-12-14 08:44:43,142 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 564 transitions. Word has length 76 [2022-12-14 08:44:43,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:44:43,143 INFO L495 AbstractCegarLoop]: Abstraction has 400 states and 564 transitions. [2022-12-14 08:44:43,143 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) [2022-12-14 08:44:43,143 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 564 transitions. [2022-12-14 08:44:43,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-12-14 08:44:43,148 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:44:43,148 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 24, 24, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2022-12-14 08:44:43,153 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93badff7-00d4-4610-bd47-f373a9e2b3eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 08:44:43,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93badff7-00d4-4610-bd47-f373a9e2b3eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:44:43,350 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:44:43,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:44:43,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1087608584, now seen corresponding path program 4 times [2022-12-14 08:44:43,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:44:43,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75057462] [2022-12-14 08:44:43,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:44:43,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:44:43,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:44:44,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1548 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1248 trivial. 0 not checked. [2022-12-14 08:44:44,101 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:44:44,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75057462] [2022-12-14 08:44:44,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75057462] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:44:44,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935009559] [2022-12-14 08:44:44,101 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 08:44:44,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:44:44,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93badff7-00d4-4610-bd47-f373a9e2b3eb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:44:44,102 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93badff7-00d4-4610-bd47-f373a9e2b3eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:44:44,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93badff7-00d4-4610-bd47-f373a9e2b3eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 08:44:44,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:44:44,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 806 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 08:44:44,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:44:44,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1548 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1248 trivial. 0 not checked. [2022-12-14 08:44:44,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:44:44,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1548 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1248 trivial. 0 not checked. [2022-12-14 08:44:44,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935009559] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:44:44,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1322794152] [2022-12-14 08:44:44,823 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 08:44:44,823 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:44:44,823 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:44:44,823 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:44:44,823 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:44:44,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:44:44,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:44:44,855 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 08:44:44,856 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 [2022-12-14 08:44:44,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:44:44,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:44:44,865 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 [2022-12-14 08:44:44,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:44:44,886 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 [2022-12-14 08:44:44,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:44:45,022 INFO L321 Elim1Store]: treesize reduction 451, result has 15.4 percent of original size [2022-12-14 08:44:45,023 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 [2022-12-14 08:44:45,117 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 [2022-12-14 08:44:45,133 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 [2022-12-14 08:44:45,153 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 [2022-12-14 08:44:45,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:44:45,207 INFO L321 Elim1Store]: treesize reduction 29, result has 9.4 percent of original size [2022-12-14 08:44:45,207 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 [2022-12-14 08:44:45,311 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 [2022-12-14 08:44:45,365 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 [2022-12-14 08:44:45,401 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 [2022-12-14 08:44:45,438 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 [2022-12-14 08:44:45,501 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 [2022-12-14 08:44:45,534 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 [2022-12-14 08:44:45,577 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 [2022-12-14 08:44:45,622 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 [2022-12-14 08:44:45,639 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:44:46,956 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 [2022-12-14 08:44:46,956 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:44:46,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:44:46,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 52 [2022-12-14 08:44:46,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21997544] [2022-12-14 08:44:46,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:44:46,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-12-14 08:44:46,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:44:46,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-12-14 08:44:46,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1410, Invalid=2372, Unknown=0, NotChecked=0, Total=3782 [2022-12-14 08:44:46,961 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) [2022-12-14 08:44:48,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:44:48,257 INFO L93 Difference]: Finished difference Result 2075 states and 3104 transitions. [2022-12-14 08:44:48,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-12-14 08:44:48,258 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 [2022-12-14 08:44:48,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:44:48,262 INFO L225 Difference]: With dead ends: 2075 [2022-12-14 08:44:48,262 INFO L226 Difference]: Without dead ends: 1701 [2022-12-14 08:44:48,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 362 SyntacticMatches, 25 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2786 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1410, Invalid=2372, Unknown=0, NotChecked=0, Total=3782 [2022-12-14 08:44:48,264 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 3420 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 08:44:48,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3420 Valid, 673 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 08:44:48,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1701 states. [2022-12-14 08:44:48,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1701 to 790. [2022-12-14 08:44:48,339 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) [2022-12-14 08:44:48,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 790 states to 790 states and 1110 transitions. [2022-12-14 08:44:48,341 INFO L78 Accepts]: Start accepts. Automaton has 790 states and 1110 transitions. Word has length 141 [2022-12-14 08:44:48,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:44:48,341 INFO L495 AbstractCegarLoop]: Abstraction has 790 states and 1110 transitions. [2022-12-14 08:44:48,341 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) [2022-12-14 08:44:48,341 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states and 1110 transitions. [2022-12-14 08:44:48,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2022-12-14 08:44:48,344 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:44:48,344 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 50, 50, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2022-12-14 08:44:48,350 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93badff7-00d4-4610-bd47-f373a9e2b3eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 08:44:48,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93badff7-00d4-4610-bd47-f373a9e2b3eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 08:44:48,545 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:44:48,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:44:48,545 INFO L85 PathProgramCache]: Analyzing trace with hash 389174428, now seen corresponding path program 5 times [2022-12-14 08:44:48,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:44:48,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859286026] [2022-12-14 08:44:48,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:44:48,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:44:48,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:44:50,772 INFO L134 CoverageAnalysis]: Checked inductivity of 6449 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 5174 trivial. 0 not checked. [2022-12-14 08:44:50,772 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:44:50,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859286026] [2022-12-14 08:44:50,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859286026] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:44:50,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131864155] [2022-12-14 08:44:50,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:44:50,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:44:50,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93badff7-00d4-4610-bd47-f373a9e2b3eb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:44:50,774 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93badff7-00d4-4610-bd47-f373a9e2b3eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:44:50,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93badff7-00d4-4610-bd47-f373a9e2b3eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 08:44:50,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 08:44:50,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:44:50,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 08:44:50,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:44:51,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6449 backedges. 295 proven. 28 refuted. 0 times theorem prover too weak. 6126 trivial. 0 not checked. [2022-12-14 08:44:51,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:44:51,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6449 backedges. 295 proven. 28 refuted. 0 times theorem prover too weak. 6126 trivial. 0 not checked. [2022-12-14 08:44:51,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131864155] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:44:51,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1664908646] [2022-12-14 08:44:51,371 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 08:44:51,371 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:44:51,371 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:44:51,371 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:44:51,371 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:44:51,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:44:51,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:44:51,412 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 08:44:51,412 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 [2022-12-14 08:44:51,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:44:51,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:44:51,422 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 [2022-12-14 08:44:51,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:44:51,452 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 [2022-12-14 08:44:51,586 INFO L321 Elim1Store]: treesize reduction 550, result has 11.4 percent of original size [2022-12-14 08:44:51,587 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 [2022-12-14 08:44:51,632 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 [2022-12-14 08:44:51,652 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 [2022-12-14 08:44:51,671 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 [2022-12-14 08:44:51,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:44:51,723 INFO L321 Elim1Store]: treesize reduction 29, result has 9.4 percent of original size [2022-12-14 08:44:51,723 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 [2022-12-14 08:44:51,808 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 [2022-12-14 08:44:51,863 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 [2022-12-14 08:44:51,894 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 [2022-12-14 08:44:51,929 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 [2022-12-14 08:44:51,973 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 [2022-12-14 08:44:52,008 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 [2022-12-14 08:44:52,044 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 [2022-12-14 08:44:52,077 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 [2022-12-14 08:44:52,094 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:44:52,990 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 [2022-12-14 08:44:52,990 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:44:52,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:44:52,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 9, 9] total 67 [2022-12-14 08:44:52,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314949268] [2022-12-14 08:44:52,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:44:52,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-12-14 08:44:52,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:44:52,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-12-14 08:44:52,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1486, Invalid=4214, Unknown=0, NotChecked=0, Total=5700 [2022-12-14 08:44:52,996 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) [2022-12-14 08:46:24,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:46:24,969 INFO L93 Difference]: Finished difference Result 7850 states and 11356 transitions. [2022-12-14 08:46:24,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 834 states. [2022-12-14 08:46:24,970 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 [2022-12-14 08:46:24,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:46:24,984 INFO L225 Difference]: With dead ends: 7850 [2022-12-14 08:46:24,984 INFO L226 Difference]: Without dead ends: 7106 [2022-12-14 08:46:25,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1945 GetRequests, 1096 SyntacticMatches, 0 SemanticMatches, 849 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329851 ImplicationChecksByTransitivity, 68.2s TimeCoverageRelationStatistics Valid=169270, Invalid=554080, Unknown=0, NotChecked=0, Total=723350 [2022-12-14 08:46:25,026 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 55205 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 2894 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s 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, 2.6s IncrementalHoareTripleChecker+Time [2022-12-14 08:46:25,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55205 Valid, 783 Invalid, 3513 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2894 Valid, 619 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-12-14 08:46:25,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7106 states. [2022-12-14 08:46:25,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7106 to 871. [2022-12-14 08:46:25,189 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) [2022-12-14 08:46:25,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 1233 transitions. [2022-12-14 08:46:25,191 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 1233 transitions. Word has length 271 [2022-12-14 08:46:25,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:46:25,191 INFO L495 AbstractCegarLoop]: Abstraction has 871 states and 1233 transitions. [2022-12-14 08:46:25,191 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) [2022-12-14 08:46:25,191 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 1233 transitions. [2022-12-14 08:46:25,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2022-12-14 08:46:25,194 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:46:25,194 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 51, 51, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2022-12-14 08:46:25,200 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93badff7-00d4-4610-bd47-f373a9e2b3eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 08:46:25,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93badff7-00d4-4610-bd47-f373a9e2b3eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:46:25,395 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:46:25,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:46:25,395 INFO L85 PathProgramCache]: Analyzing trace with hash 2035004742, now seen corresponding path program 6 times [2022-12-14 08:46:25,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:46:25,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738370545] [2022-12-14 08:46:25,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:46:25,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:46:25,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:46:27,355 INFO L134 CoverageAnalysis]: Checked inductivity of 7167 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 5841 trivial. 0 not checked. [2022-12-14 08:46:27,356 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:46:27,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738370545] [2022-12-14 08:46:27,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738370545] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:46:27,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790111948] [2022-12-14 08:46:27,356 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 08:46:27,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:46:27,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93badff7-00d4-4610-bd47-f373a9e2b3eb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:46:27,357 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93badff7-00d4-4610-bd47-f373a9e2b3eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:46:27,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93badff7-00d4-4610-bd47-f373a9e2b3eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 08:46:27,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 08:46:27,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:46:27,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 1670 conjuncts, 53 conjunts are in the unsatisfiable core [2022-12-14 08:46:27,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:46:27,757 INFO L134 CoverageAnalysis]: Checked inductivity of 7167 backedges. 0 proven. 5651 refuted. 0 times theorem prover too weak. 1516 trivial. 0 not checked. [2022-12-14 08:46:27,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:46:29,871 INFO L134 CoverageAnalysis]: Checked inductivity of 7167 backedges. 0 proven. 5651 refuted. 0 times theorem prover too weak. 1516 trivial. 0 not checked. [2022-12-14 08:46:29,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790111948] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:46:29,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1653448797] [2022-12-14 08:46:29,873 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 08:46:29,873 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:46:29,873 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:46:29,873 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:46:29,873 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:46:29,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:46:29,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:46:29,901 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-14 08:46:29,901 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 [2022-12-14 08:46:29,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:46:29,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:46:29,933 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 08:46:29,934 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 [2022-12-14 08:46:29,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:46:29,954 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 [2022-12-14 08:46:30,120 INFO L321 Elim1Store]: treesize reduction 550, result has 11.4 percent of original size [2022-12-14 08:46:30,121 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 [2022-12-14 08:46:30,181 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 [2022-12-14 08:46:30,205 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 [2022-12-14 08:46:30,228 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 [2022-12-14 08:46:30,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:46:30,283 INFO L321 Elim1Store]: treesize reduction 29, result has 9.4 percent of original size [2022-12-14 08:46:30,283 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 [2022-12-14 08:46:30,397 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 [2022-12-14 08:46:30,451 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 [2022-12-14 08:46:30,478 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 [2022-12-14 08:46:30,513 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 [2022-12-14 08:46:30,567 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 [2022-12-14 08:46:30,612 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 [2022-12-14 08:46:30,649 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 [2022-12-14 08:46:30,682 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 [2022-12-14 08:46:30,703 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:46:31,614 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 [2022-12-14 08:46:31,614 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:46:31,614 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:46:31,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 54, 54] total 107 [2022-12-14 08:46:31,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535893497] [2022-12-14 08:46:31,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:46:31,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-12-14 08:46:31,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:46:31,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-12-14 08:46:31,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5703, Invalid=7637, Unknown=0, NotChecked=0, Total=13340 [2022-12-14 08:46:31,619 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) [2022-12-14 08:46:39,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:46:39,576 INFO L93 Difference]: Finished difference Result 7838 states and 11900 transitions. [2022-12-14 08:46:39,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-12-14 08:46:39,577 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 [2022-12-14 08:46:39,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:46:39,592 INFO L225 Difference]: With dead ends: 7838 [2022-12-14 08:46:39,593 INFO L226 Difference]: Without dead ends: 7020 [2022-12-14 08:46:39,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 951 GetRequests, 837 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1625 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5703, Invalid=7637, Unknown=0, NotChecked=0, Total=13340 [2022-12-14 08:46:39,595 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 7829 mSDsluCounter, 1358 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:46:39,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7829 Valid, 1373 Invalid, 1165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 848 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-14 08:46:39,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7020 states. [2022-12-14 08:46:39,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7020 to 1666. [2022-12-14 08:46:39,915 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) [2022-12-14 08:46:39,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 2346 transitions. [2022-12-14 08:46:39,917 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 2346 transitions. Word has length 300 [2022-12-14 08:46:39,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:46:39,917 INFO L495 AbstractCegarLoop]: Abstraction has 1666 states and 2346 transitions. [2022-12-14 08:46:39,918 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) [2022-12-14 08:46:39,918 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 2346 transitions. [2022-12-14 08:46:39,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 566 [2022-12-14 08:46:39,950 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:46:39,950 INFO L195 NwaCegarLoop]: trace histogram [104, 104, 104, 104, 104, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2022-12-14 08:46:39,956 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93badff7-00d4-4610-bd47-f373a9e2b3eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 08:46:40,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93badff7-00d4-4610-bd47-f373a9e2b3eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:46:40,152 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:46:40,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:46:40,153 INFO L85 PathProgramCache]: Analyzing trace with hash -559275578, now seen corresponding path program 7 times [2022-12-14 08:46:40,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:46:40,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482244374] [2022-12-14 08:46:40,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:46:40,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:46:40,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:46:48,194 INFO L134 CoverageAnalysis]: Checked inductivity of 28208 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 22748 trivial. 0 not checked. [2022-12-14 08:46:48,194 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:46:48,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482244374] [2022-12-14 08:46:48,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482244374] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:46:48,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265831900] [2022-12-14 08:46:48,194 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 08:46:48,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:46:48,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93badff7-00d4-4610-bd47-f373a9e2b3eb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:46:48,195 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93badff7-00d4-4610-bd47-f373a9e2b3eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:46:48,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93badff7-00d4-4610-bd47-f373a9e2b3eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 08:46:48,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:46:48,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 3048 conjuncts, 106 conjunts are in the unsatisfiable core [2022-12-14 08:46:48,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:46:48,735 INFO L134 CoverageAnalysis]: Checked inductivity of 28208 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 22748 trivial. 0 not checked. [2022-12-14 08:46:48,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:46:55,981 INFO L134 CoverageAnalysis]: Checked inductivity of 28208 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 22748 trivial. 0 not checked. [2022-12-14 08:46:55,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265831900] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:46:55,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1263781888] [2022-12-14 08:46:55,983 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 08:46:55,983 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:46:55,984 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:46:55,984 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:46:55,984 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:46:55,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:46:55,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:46:56,012 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-14 08:46:56,012 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 [2022-12-14 08:46:56,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:46:56,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:46:56,044 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 08:46:56,044 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 [2022-12-14 08:46:56,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:46:56,069 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 [2022-12-14 08:46:56,219 INFO L321 Elim1Store]: treesize reduction 550, result has 11.4 percent of original size [2022-12-14 08:46:56,220 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 [2022-12-14 08:46:56,273 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 27 treesize of output 23 [2022-12-14 08:46:56,296 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 [2022-12-14 08:46:56,317 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 [2022-12-14 08:46:56,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:46:56,370 INFO L321 Elim1Store]: treesize reduction 29, result has 9.4 percent of original size [2022-12-14 08:46:56,371 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 [2022-12-14 08:46:56,463 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 [2022-12-14 08:46:56,515 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 [2022-12-14 08:46:56,547 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 [2022-12-14 08:46:56,576 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 [2022-12-14 08:46:56,618 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 [2022-12-14 08:46:56,647 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 [2022-12-14 08:46:56,677 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 [2022-12-14 08:46:56,704 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 [2022-12-14 08:46:56,722 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:46:57,768 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 [2022-12-14 08:46:57,768 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:46:57,768 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:46:57,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106, 106] total 212 [2022-12-14 08:46:57,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180978869] [2022-12-14 08:46:57,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:46:57,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 213 states [2022-12-14 08:46:57,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:46:57,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 213 interpolants. [2022-12-14 08:46:57,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22610, Invalid=26452, Unknown=0, NotChecked=0, Total=49062 [2022-12-14 08:46:57,775 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) [2022-12-14 08:48:22,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:48:22,785 INFO L93 Difference]: Finished difference Result 15523 states and 23560 transitions. [2022-12-14 08:48:22,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2022-12-14 08:48:22,786 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 [2022-12-14 08:48:22,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:48:22,810 INFO L225 Difference]: With dead ends: 15523 [2022-12-14 08:48:22,810 INFO L226 Difference]: Without dead ends: 13963 [2022-12-14 08:48:22,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1799 GetRequests, 1579 SyntacticMatches, 0 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3268 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=22610, Invalid=26452, Unknown=0, NotChecked=0, Total=49062 [2022-12-14 08:48:22,816 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 17803 mSDsluCounter, 2733 mSDsCounter, 0 mSdLazyCounter, 1693 mSolverCounterSat, 1045 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17803 SdHoareTripleChecker+Valid, 2748 SdHoareTripleChecker+Invalid, 2738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1045 IncrementalHoareTripleChecker+Valid, 1693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:48:22,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17803 Valid, 2748 Invalid, 2738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1045 Valid, 1693 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-12-14 08:48:22,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13963 states. [2022-12-14 08:48:23,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13963 to 3256. [2022-12-14 08:48:23,502 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) [2022-12-14 08:48:23,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3256 states to 3256 states and 4572 transitions. [2022-12-14 08:48:23,507 INFO L78 Accepts]: Start accepts. Automaton has 3256 states and 4572 transitions. Word has length 565 [2022-12-14 08:48:23,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:48:23,507 INFO L495 AbstractCegarLoop]: Abstraction has 3256 states and 4572 transitions. [2022-12-14 08:48:23,507 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) [2022-12-14 08:48:23,507 INFO L276 IsEmpty]: Start isEmpty. Operand 3256 states and 4572 transitions. [2022-12-14 08:48:23,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1096 [2022-12-14 08:48:23,516 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:48:23,516 INFO L195 NwaCegarLoop]: trace histogram [210, 210, 210, 210, 210, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2022-12-14 08:48:23,524 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93badff7-00d4-4610-bd47-f373a9e2b3eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 08:48:23,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93badff7-00d4-4610-bd47-f373a9e2b3eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 08:48:23,718 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:48:23,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:48:23,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1772960006, now seen corresponding path program 8 times [2022-12-14 08:48:23,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:48:23,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197027079] [2022-12-14 08:48:23,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:48:23,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:48:24,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:49:01,412 INFO L134 CoverageAnalysis]: Checked inductivity of 112425 backedges. 0 proven. 22155 refuted. 0 times theorem prover too weak. 90270 trivial. 0 not checked. [2022-12-14 08:49:01,413 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:49:01,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197027079] [2022-12-14 08:49:01,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197027079] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:49:01,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474329182] [2022-12-14 08:49:01,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:49:01,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:49:01,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93badff7-00d4-4610-bd47-f373a9e2b3eb/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:49:01,414 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93badff7-00d4-4610-bd47-f373a9e2b3eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:49:01,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93badff7-00d4-4610-bd47-f373a9e2b3eb/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 08:49:03,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-12-14 08:49:03,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:49:03,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 08:49:03,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:49:04,423 INFO L134 CoverageAnalysis]: Checked inductivity of 112425 backedges. 2509 proven. 190 refuted. 0 times theorem prover too weak. 109726 trivial. 0 not checked. [2022-12-14 08:49:04,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:49:05,881 INFO L134 CoverageAnalysis]: Checked inductivity of 112425 backedges. 2509 proven. 190 refuted. 0 times theorem prover too weak. 109726 trivial. 0 not checked. [2022-12-14 08:49:05,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474329182] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:49:05,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1441213929] [2022-12-14 08:49:05,882 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 08:49:05,882 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:49:05,883 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:49:05,883 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:49:05,883 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:49:05,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:49:05,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:49:05,908 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-14 08:49:05,908 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 [2022-12-14 08:49:05,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:49:05,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:49:05,939 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 08:49:05,939 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 [2022-12-14 08:49:05,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:49:05,958 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 [2022-12-14 08:49:06,011 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:49:06,107 INFO L321 Elim1Store]: treesize reduction 451, result has 15.4 percent of original size [2022-12-14 08:49:06,107 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 [2022-12-14 08:49:06,184 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 [2022-12-14 08:49:06,198 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 [2022-12-14 08:49:06,214 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 [2022-12-14 08:49:06,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:49:06,260 INFO L321 Elim1Store]: treesize reduction 29, result has 9.4 percent of original size [2022-12-14 08:49:06,260 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 [2022-12-14 08:49:06,338 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 11 treesize of output 7 [2022-12-14 08:49:06,387 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 [2022-12-14 08:49:06,415 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 [2022-12-14 08:49:06,462 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 [2022-12-14 08:49:06,505 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 [2022-12-14 08:49:06,535 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 [2022-12-14 08:49:06,560 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 [2022-12-14 08:49:06,587 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 [2022-12-14 08:49:06,599 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:49:33,451 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 [2022-12-14 08:49:33,451 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:49:33,451 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:49:33,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [212, 15, 15] total 239 [2022-12-14 08:49:33,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871591644] [2022-12-14 08:49:33,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:49:33,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 239 states [2022-12-14 08:49:33,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:49:33,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 239 interpolants. [2022-12-14 08:49:33,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22897, Invalid=38359, Unknown=0, NotChecked=0, Total=61256 [2022-12-14 08:49:33,458 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)