./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/getNumbers2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) 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_0bf356e6-b503-4b45-8c5c-a7d552c67df8/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf356e6-b503-4b45-8c5c-a7d552c67df8/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_0bf356e6-b503-4b45-8c5c-a7d552c67df8/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf356e6-b503-4b45-8c5c-a7d552c67df8/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/getNumbers2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf356e6-b503-4b45-8c5c-a7d552c67df8/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf356e6-b503-4b45-8c5c-a7d552c67df8/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cf0bb070a6f67963fcaf42c16427fd9b591ad6ca597a21a650e9cf23fa51a6dd --- 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 12:19:50,681 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 12:19:50,682 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 12:19:50,697 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 12:19:50,697 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 12:19:50,698 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 12:19:50,698 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 12:19:50,700 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 12:19:50,701 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 12:19:50,701 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 12:19:50,702 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 12:19:50,703 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 12:19:50,703 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 12:19:50,704 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 12:19:50,704 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 12:19:50,705 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 12:19:50,706 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 12:19:50,706 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 12:19:50,708 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 12:19:50,709 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 12:19:50,710 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 12:19:50,711 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 12:19:50,712 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 12:19:50,713 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 12:19:50,715 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 12:19:50,715 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 12:19:50,715 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 12:19:50,716 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 12:19:50,717 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 12:19:50,717 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 12:19:50,717 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 12:19:50,718 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 12:19:50,719 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 12:19:50,719 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 12:19:50,720 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 12:19:50,720 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 12:19:50,721 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 12:19:50,721 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 12:19:50,721 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 12:19:50,722 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 12:19:50,722 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 12:19:50,723 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf356e6-b503-4b45-8c5c-a7d552c67df8/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 12:19:50,746 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 12:19:50,746 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 12:19:50,747 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 12:19:50,747 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 12:19:50,748 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 12:19:50,748 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 12:19:50,748 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 12:19:50,748 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 12:19:50,749 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 12:19:50,749 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 12:19:50,749 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 12:19:50,749 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 12:19:50,749 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 12:19:50,750 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 12:19:50,750 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 12:19:50,750 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 12:19:50,750 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 12:19:50,750 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 12:19:50,751 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 12:19:50,751 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 12:19:50,751 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 12:19:50,752 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 12:19:50,752 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 12:19:50,752 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 12:19:50,752 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 12:19:50,752 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 12:19:50,752 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 12:19:50,753 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 12:19:50,753 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 12:19:50,753 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 12:19:50,753 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 12:19:50,753 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 12:19:50,753 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 12:19:50,754 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 12:19:50,754 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 12:19:50,754 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:19:50,754 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 12:19:50,754 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 12:19:50,755 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 12:19:50,755 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 12:19:50,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 12:19:50,755 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 12:19:50,755 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_0bf356e6-b503-4b45-8c5c-a7d552c67df8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf356e6-b503-4b45-8c5c-a7d552c67df8/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cf0bb070a6f67963fcaf42c16427fd9b591ad6ca597a21a650e9cf23fa51a6dd [2022-12-14 12:19:50,940 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 12:19:50,960 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 12:19:50,962 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 12:19:50,963 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 12:19:50,964 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 12:19:50,965 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf356e6-b503-4b45-8c5c-a7d552c67df8/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/memsafety-ext3/getNumbers2.c [2022-12-14 12:19:53,639 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 12:19:53,789 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 12:19:53,790 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf356e6-b503-4b45-8c5c-a7d552c67df8/sv-benchmarks/c/memsafety-ext3/getNumbers2.c [2022-12-14 12:19:53,796 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf356e6-b503-4b45-8c5c-a7d552c67df8/bin/utaipan-gh47qXpMRh/data/f91db3489/a2ee018b95054aa286ab5e032556c834/FLAGdb7b3dbe7 [2022-12-14 12:19:53,812 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf356e6-b503-4b45-8c5c-a7d552c67df8/bin/utaipan-gh47qXpMRh/data/f91db3489/a2ee018b95054aa286ab5e032556c834 [2022-12-14 12:19:53,815 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 12:19:53,816 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 12:19:53,818 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 12:19:53,818 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 12:19:53,821 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 12:19:53,822 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:19:53" (1/1) ... [2022-12-14 12:19:53,823 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22e07bc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:19:53, skipping insertion in model container [2022-12-14 12:19:53,823 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:19:53" (1/1) ... [2022-12-14 12:19:53,831 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 12:19:53,843 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 12:19:53,987 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:19:53,999 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 12:19:54,014 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:19:54,028 INFO L208 MainTranslator]: Completed translation [2022-12-14 12:19:54,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:19:54 WrapperNode [2022-12-14 12:19:54,028 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 12:19:54,029 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 12:19:54,030 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 12:19:54,030 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 12:19:54,037 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:19:54" (1/1) ... [2022-12-14 12:19:54,044 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:19:54" (1/1) ... [2022-12-14 12:19:54,059 INFO L138 Inliner]: procedures = 10, calls = 12, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 46 [2022-12-14 12:19:54,060 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 12:19:54,060 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 12:19:54,061 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 12:19:54,061 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 12:19:54,069 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:19:54" (1/1) ... [2022-12-14 12:19:54,069 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:19:54" (1/1) ... [2022-12-14 12:19:54,071 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:19:54" (1/1) ... [2022-12-14 12:19:54,071 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:19:54" (1/1) ... [2022-12-14 12:19:54,076 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:19:54" (1/1) ... [2022-12-14 12:19:54,079 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:19:54" (1/1) ... [2022-12-14 12:19:54,080 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:19:54" (1/1) ... [2022-12-14 12:19:54,081 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:19:54" (1/1) ... [2022-12-14 12:19:54,082 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 12:19:54,083 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 12:19:54,083 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 12:19:54,084 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 12:19:54,084 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:19:54" (1/1) ... [2022-12-14 12:19:54,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:19:54,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf356e6-b503-4b45-8c5c-a7d552c67df8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:19:54,108 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf356e6-b503-4b45-8c5c-a7d552c67df8/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 12:19:54,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf356e6-b503-4b45-8c5c-a7d552c67df8/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 12:19:54,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 12:19:54,142 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 12:19:54,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 12:19:54,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 12:19:54,142 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 12:19:54,142 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 12:19:54,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 12:19:54,199 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 12:19:54,200 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 12:19:54,325 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 12:19:54,352 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 12:19:54,352 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 12:19:54,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:19:54 BoogieIcfgContainer [2022-12-14 12:19:54,354 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 12:19:54,356 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 12:19:54,356 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 12:19:54,358 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 12:19:54,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 12:19:53" (1/3) ... [2022-12-14 12:19:54,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4daa2381 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:19:54, skipping insertion in model container [2022-12-14 12:19:54,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:19:54" (2/3) ... [2022-12-14 12:19:54,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4daa2381 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:19:54, skipping insertion in model container [2022-12-14 12:19:54,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:19:54" (3/3) ... [2022-12-14 12:19:54,361 INFO L112 eAbstractionObserver]: Analyzing ICFG getNumbers2.c [2022-12-14 12:19:54,375 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 12:19:54,375 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2022-12-14 12:19:54,406 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 12:19:54,411 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@552a2d11, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 12:19:54,411 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2022-12-14 12:19:54,414 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 8 states have (on average 2.375) internal successors, (19), 17 states have internal predecessors, (19), 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 12:19:54,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 12:19:54,419 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:19:54,419 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 12:19:54,419 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-14 12:19:54,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:19:54,423 INFO L85 PathProgramCache]: Analyzing trace with hash 86812, now seen corresponding path program 1 times [2022-12-14 12:19:54,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:19:54,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929284004] [2022-12-14 12:19:54,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:19:54,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:19:54,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:19:54,572 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 12:19:54,572 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:19:54,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929284004] [2022-12-14 12:19:54,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929284004] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:19:54,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:19:54,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 12:19:54,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749267639] [2022-12-14 12:19:54,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:19:54,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:19:54,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:19:54,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:19:54,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:19:54,605 INFO L87 Difference]: Start difference. First operand has 18 states, 8 states have (on average 2.375) internal successors, (19), 17 states have internal predecessors, (19), 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, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 12:19:54,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:19:54,639 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2022-12-14 12:19:54,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:19:54,641 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 3 [2022-12-14 12:19:54,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:19:54,647 INFO L225 Difference]: With dead ends: 17 [2022-12-14 12:19:54,647 INFO L226 Difference]: Without dead ends: 16 [2022-12-14 12:19:54,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 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 12:19:54,650 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 9 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:19:54,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 8 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:19:54,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-12-14 12:19:54,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-12-14 12:19:54,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 8 states have (on average 2.125) internal successors, (17), 15 states have internal predecessors, (17), 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 12:19:54,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-12-14 12:19:54,671 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 3 [2022-12-14 12:19:54,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:19:54,672 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-12-14 12:19:54,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 12:19:54,672 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-12-14 12:19:54,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 12:19:54,672 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:19:54,672 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 12:19:54,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 12:19:54,673 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-14 12:19:54,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:19:54,673 INFO L85 PathProgramCache]: Analyzing trace with hash 86813, now seen corresponding path program 1 times [2022-12-14 12:19:54,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:19:54,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654733398] [2022-12-14 12:19:54,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:19:54,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:19:54,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:19:54,745 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 12:19:54,745 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:19:54,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654733398] [2022-12-14 12:19:54,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654733398] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:19:54,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:19:54,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 12:19:54,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941999445] [2022-12-14 12:19:54,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:19:54,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:19:54,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:19:54,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:19:54,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:19:54,749 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 12:19:54,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:19:54,775 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2022-12-14 12:19:54,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:19:54,776 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 3 [2022-12-14 12:19:54,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:19:54,776 INFO L225 Difference]: With dead ends: 18 [2022-12-14 12:19:54,776 INFO L226 Difference]: Without dead ends: 18 [2022-12-14 12:19:54,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 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 12:19:54,777 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:19:54,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:19:54,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-12-14 12:19:54,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-12-14 12:19:54,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.9) internal successors, (19), 17 states have internal predecessors, (19), 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 12:19:54,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-12-14 12:19:54,780 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 3 [2022-12-14 12:19:54,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:19:54,781 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-12-14 12:19:54,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 12:19:54,781 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-12-14 12:19:54,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 12:19:54,781 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:19:54,781 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2022-12-14 12:19:54,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 12:19:54,781 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-14 12:19:54,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:19:54,782 INFO L85 PathProgramCache]: Analyzing trace with hash 83467017, now seen corresponding path program 1 times [2022-12-14 12:19:54,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:19:54,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155056088] [2022-12-14 12:19:54,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:19:54,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:19:54,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:19:54,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:19:54,916 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:19:54,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155056088] [2022-12-14 12:19:54,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155056088] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:19:54,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948754368] [2022-12-14 12:19:54,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:19:54,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:19:54,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf356e6-b503-4b45-8c5c-a7d552c67df8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:19:54,918 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf356e6-b503-4b45-8c5c-a7d552c67df8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:19:54,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf356e6-b503-4b45-8c5c-a7d552c67df8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 12:19:54,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:19:54,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 12:19:54,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:19:55,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:19:55,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:19:55,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:19:55,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948754368] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:19:55,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1648819081] [2022-12-14 12:19:55,111 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2022-12-14 12:19:55,112 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:19:55,116 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:19:55,121 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:19:55,121 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:19:55,167 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 7 treesize of output 6 [2022-12-14 12:19:55,186 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 18 treesize of output 13 [2022-12-14 12:19:55,241 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 116 treesize of output 109 [2022-12-14 12:19:55,287 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 18 treesize of output 14 [2022-12-14 12:19:55,292 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:19:55,364 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '129#(and (<= 0 |ULTIMATE.start_getNumbers_~i~0#1|) (not (<= (+ (* |ULTIMATE.start_getNumbers_~i~0#1| 4) |~#array~0.offset| 4) (select |#length| |~#array~0.base|))) (= |~#array~0.offset| 0) (= |~#array~0.base| 1) (= |#NULL.offset| 0) (< |ULTIMATE.start_getNumbers_~i~0#1| 10) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 12:19:55,364 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:19:55,364 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:19:55,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2022-12-14 12:19:55,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878426065] [2022-12-14 12:19:55,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:19:55,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 12:19:55,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:19:55,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 12:19:55,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-12-14 12:19:55,366 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 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 12:19:55,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:19:55,494 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2022-12-14 12:19:55,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 12:19:55,494 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 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 5 [2022-12-14 12:19:55,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:19:55,494 INFO L225 Difference]: With dead ends: 22 [2022-12-14 12:19:55,495 INFO L226 Difference]: Without dead ends: 22 [2022-12-14 12:19:55,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-12-14 12:19:55,496 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:19:55,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 35 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:19:55,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-12-14 12:19:55,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-12-14 12:19:55,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 21 states have internal predecessors, (23), 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 12:19:55,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-12-14 12:19:55,498 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 5 [2022-12-14 12:19:55,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:19:55,498 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-12-14 12:19:55,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 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 12:19:55,498 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-12-14 12:19:55,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 12:19:55,499 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:19:55,499 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1] [2022-12-14 12:19:55,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf356e6-b503-4b45-8c5c-a7d552c67df8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 12:19:55,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf356e6-b503-4b45-8c5c-a7d552c67df8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:19:55,701 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-14 12:19:55,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:19:55,703 INFO L85 PathProgramCache]: Analyzing trace with hash 785855074, now seen corresponding path program 1 times [2022-12-14 12:19:55,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:19:55,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192365454] [2022-12-14 12:19:55,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:19:55,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:19:55,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:19:55,865 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 12:19:55,865 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:19:55,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192365454] [2022-12-14 12:19:55,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192365454] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:19:55,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:19:55,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:19:55,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845967229] [2022-12-14 12:19:55,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:19:55,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:19:55,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:19:55,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:19:55,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:19:55,868 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 12:19:55,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:19:55,889 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2022-12-14 12:19:55,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:19:55,889 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 12 [2022-12-14 12:19:55,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:19:55,890 INFO L225 Difference]: With dead ends: 29 [2022-12-14 12:19:55,890 INFO L226 Difference]: Without dead ends: 29 [2022-12-14 12:19:55,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:19:55,891 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:19:55,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 12 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:19:55,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-12-14 12:19:55,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 23. [2022-12-14 12:19:55,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.5) internal successors, (24), 22 states have internal predecessors, (24), 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 12:19:55,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2022-12-14 12:19:55,895 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 12 [2022-12-14 12:19:55,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:19:55,896 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2022-12-14 12:19:55,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 12:19:55,896 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2022-12-14 12:19:55,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 12:19:55,896 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:19:55,896 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1] [2022-12-14 12:19:55,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 12:19:55,897 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-14 12:19:55,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:19:55,897 INFO L85 PathProgramCache]: Analyzing trace with hash 785853975, now seen corresponding path program 1 times [2022-12-14 12:19:55,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:19:55,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102908072] [2022-12-14 12:19:55,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:19:55,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:19:55,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:19:55,962 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:19:55,962 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:19:55,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102908072] [2022-12-14 12:19:55,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102908072] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:19:55,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371459991] [2022-12-14 12:19:55,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:19:55,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:19:55,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf356e6-b503-4b45-8c5c-a7d552c67df8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:19:55,964 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf356e6-b503-4b45-8c5c-a7d552c67df8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:19:55,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf356e6-b503-4b45-8c5c-a7d552c67df8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 12:19:56,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:19:56,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 12:19:56,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:19:56,033 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:19:56,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:19:56,090 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:19:56,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371459991] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:19:56,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [322766994] [2022-12-14 12:19:56,092 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-12-14 12:19:56,092 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:19:56,092 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:19:56,093 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:19:56,093 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:19:56,102 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 7 treesize of output 6 [2022-12-14 12:19:56,115 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 18 treesize of output 13 [2022-12-14 12:19:56,154 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 116 treesize of output 109 [2022-12-14 12:19:56,191 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 18 treesize of output 14 [2022-12-14 12:19:56,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 12:19:56,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 12:19:56,220 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:19:56,365 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '316#(and (= |ULTIMATE.start_getNumbers2_~i~1#1| 0) (= (select |#valid| |ULTIMATE.start_getNumbers2_~#numbers2~0#1.base|) 1) (= |ULTIMATE.start_getNumbers_#res#1.base| |ULTIMATE.start_getNumbers2_~numbers~0#1.base|) (<= 10 |ULTIMATE.start_getNumbers_~i~0#1|) (< |#StackHeapBarrier| |ULTIMATE.start_getNumbers2_~#numbers2~0#1.base|) (= |ULTIMATE.start_getNumbers_#res#1.offset| |~#array~0.offset|) (= |ULTIMATE.start_getNumbers_#res#1.base| |~#array~0.base|) (= 40 (select |#length| |ULTIMATE.start_getNumbers2_~#numbers2~0#1.base|)) (= |~#array~0.offset| 0) (= |~#array~0.base| 1) (= |#NULL.offset| 0) (not (<= (+ (* |ULTIMATE.start_getNumbers2_~i~1#1| 4) |ULTIMATE.start_getNumbers2_~numbers~0#1.offset| 4) (select |#length| |ULTIMATE.start_getNumbers2_~numbers~0#1.base|))) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_getNumbers2_~#numbers2~0#1.offset| 0) (= |ULTIMATE.start_getNumbers_#res#1.offset| |ULTIMATE.start_getNumbers2_~numbers~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-12-14 12:19:56,365 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:19:56,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:19:56,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-14 12:19:56,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253478833] [2022-12-14 12:19:56,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:19:56,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 12:19:56,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:19:56,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 12:19:56,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2022-12-14 12:19:56,368 INFO L87 Difference]: Start difference. First operand 23 states and 24 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 12:19:56,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:19:56,408 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2022-12-14 12:19:56,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 12:19:56,408 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 12 [2022-12-14 12:19:56,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:19:56,409 INFO L225 Difference]: With dead ends: 35 [2022-12-14 12:19:56,409 INFO L226 Difference]: Without dead ends: 35 [2022-12-14 12:19:56,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2022-12-14 12:19:56,409 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:19:56,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 45 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:19:56,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-12-14 12:19:56,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-12-14 12:19:56,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 34 states have internal predecessors, (36), 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 12:19:56,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2022-12-14 12:19:56,412 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 12 [2022-12-14 12:19:56,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:19:56,412 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2022-12-14 12:19:56,412 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 12:19:56,412 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2022-12-14 12:19:56,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 12:19:56,413 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:19:56,413 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1] [2022-12-14 12:19:56,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf356e6-b503-4b45-8c5c-a7d552c67df8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 12:19:56,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf356e6-b503-4b45-8c5c-a7d552c67df8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:19:56,615 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-14 12:19:56,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:19:56,616 INFO L85 PathProgramCache]: Analyzing trace with hash 100154511, now seen corresponding path program 2 times [2022-12-14 12:19:56,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:19:56,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659649455] [2022-12-14 12:19:56,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:19:56,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:19:56,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:19:56,955 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-12-14 12:19:56,956 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:19:56,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659649455] [2022-12-14 12:19:56,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659649455] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:19:56,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:19:56,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 12:19:56,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725619601] [2022-12-14 12:19:56,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:19:56,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 12:19:56,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:19:56,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 12:19:56,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:19:56,957 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 12:19:56,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:19:56,989 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2022-12-14 12:19:56,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 12:19:56,990 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 24 [2022-12-14 12:19:56,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:19:56,990 INFO L225 Difference]: With dead ends: 40 [2022-12-14 12:19:56,990 INFO L226 Difference]: Without dead ends: 40 [2022-12-14 12:19:56,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 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 12:19:56,991 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 22 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:19:56,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 8 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:19:56,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-12-14 12:19:56,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2022-12-14 12:19:56,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 35 states have internal predecessors, (38), 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 12:19:56,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2022-12-14 12:19:56,995 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 24 [2022-12-14 12:19:56,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:19:56,996 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2022-12-14 12:19:56,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 12:19:56,996 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2022-12-14 12:19:56,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 12:19:56,996 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:19:56,996 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1] [2022-12-14 12:19:56,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 12:19:56,997 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-14 12:19:56,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:19:56,997 INFO L85 PathProgramCache]: Analyzing trace with hash 100154510, now seen corresponding path program 1 times [2022-12-14 12:19:56,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:19:56,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650468893] [2022-12-14 12:19:56,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:19:56,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:19:57,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:19:57,090 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-12-14 12:19:57,090 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:19:57,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650468893] [2022-12-14 12:19:57,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650468893] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:19:57,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:19:57,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 12:19:57,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374642073] [2022-12-14 12:19:57,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:19:57,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 12:19:57,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:19:57,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 12:19:57,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:19:57,092 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 12:19:57,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:19:57,115 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2022-12-14 12:19:57,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 12:19:57,116 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 24 [2022-12-14 12:19:57,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:19:57,116 INFO L225 Difference]: With dead ends: 35 [2022-12-14 12:19:57,116 INFO L226 Difference]: Without dead ends: 35 [2022-12-14 12:19:57,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 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 12:19:57,117 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 11 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:19:57,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 9 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:19:57,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-12-14 12:19:57,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-12-14 12:19:57,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 34 states have internal predecessors, (36), 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 12:19:57,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2022-12-14 12:19:57,121 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 24 [2022-12-14 12:19:57,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:19:57,121 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2022-12-14 12:19:57,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 12:19:57,121 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2022-12-14 12:19:57,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 12:19:57,122 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:19:57,122 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1] [2022-12-14 12:19:57,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 12:19:57,122 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-14 12:19:57,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:19:57,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1190177483, now seen corresponding path program 1 times [2022-12-14 12:19:57,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:19:57,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534944264] [2022-12-14 12:19:57,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:19:57,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:19:57,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:19:57,179 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-12-14 12:19:57,179 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:19:57,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534944264] [2022-12-14 12:19:57,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534944264] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:19:57,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:19:57,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 12:19:57,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370621915] [2022-12-14 12:19:57,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:19:57,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:19:57,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:19:57,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:19:57,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:19:57,181 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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 12:19:57,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:19:57,192 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2022-12-14 12:19:57,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:19:57,193 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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 12:19:57,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:19:57,193 INFO L225 Difference]: With dead ends: 34 [2022-12-14 12:19:57,193 INFO L226 Difference]: Without dead ends: 34 [2022-12-14 12:19:57,193 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 12:19:57,194 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 3 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:19:57,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 8 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:19:57,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-12-14 12:19:57,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-12-14 12:19:57,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.206896551724138) internal successors, (35), 33 states have internal predecessors, (35), 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 12:19:57,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2022-12-14 12:19:57,197 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 25 [2022-12-14 12:19:57,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:19:57,197 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2022-12-14 12:19:57,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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 12:19:57,198 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2022-12-14 12:19:57,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 12:19:57,198 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:19:57,198 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1] [2022-12-14 12:19:57,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 12:19:57,199 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-14 12:19:57,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:19:57,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1190177482, now seen corresponding path program 1 times [2022-12-14 12:19:57,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:19:57,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592231496] [2022-12-14 12:19:57,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:19:57,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:19:57,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:19:57,270 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-12-14 12:19:57,270 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:19:57,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592231496] [2022-12-14 12:19:57,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592231496] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:19:57,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:19:57,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 12:19:57,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488653234] [2022-12-14 12:19:57,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:19:57,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:19:57,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:19:57,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:19:57,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:19:57,272 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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 12:19:57,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:19:57,289 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2022-12-14 12:19:57,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:19:57,290 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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 12:19:57,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:19:57,290 INFO L225 Difference]: With dead ends: 35 [2022-12-14 12:19:57,290 INFO L226 Difference]: Without dead ends: 35 [2022-12-14 12:19:57,290 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 12:19:57,291 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:19:57,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:19:57,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-12-14 12:19:57,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-12-14 12:19:57,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.2) internal successors, (36), 34 states have internal predecessors, (36), 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 12:19:57,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2022-12-14 12:19:57,294 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 25 [2022-12-14 12:19:57,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:19:57,294 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2022-12-14 12:19:57,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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 12:19:57,295 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2022-12-14 12:19:57,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-14 12:19:57,295 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:19:57,295 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:19:57,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 12:19:57,296 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-14 12:19:57,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:19:57,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1299237255, now seen corresponding path program 1 times [2022-12-14 12:19:57,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:19:57,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529541635] [2022-12-14 12:19:57,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:19:57,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:19:57,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:19:57,352 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-12-14 12:19:57,352 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:19:57,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529541635] [2022-12-14 12:19:57,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529541635] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:19:57,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215314552] [2022-12-14 12:19:57,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:19:57,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:19:57,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf356e6-b503-4b45-8c5c-a7d552c67df8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:19:57,353 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf356e6-b503-4b45-8c5c-a7d552c67df8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:19:57,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf356e6-b503-4b45-8c5c-a7d552c67df8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 12:19:57,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:19:57,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 12:19:57,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:19:57,439 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-12-14 12:19:57,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:19:57,454 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-12-14 12:19:57,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215314552] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:19:57,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [97452505] [2022-12-14 12:19:57,457 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-12-14 12:19:57,457 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:19:57,457 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:19:57,457 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:19:57,457 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:19:57,466 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 7 treesize of output 6 [2022-12-14 12:19:57,477 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 18 treesize of output 13 [2022-12-14 12:19:57,508 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 116 treesize of output 109 [2022-12-14 12:19:57,542 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 18 treesize of output 14 [2022-12-14 12:19:57,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 12:19:57,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 12:19:57,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:19:57,588 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 12:19:57,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 12:19:57,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:19:57,641 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:19:57,681 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 12:19:57,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 167 [2022-12-14 12:19:57,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:19:57,795 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 12:19:57,796 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 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 12:19:57,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-12-14 12:19:57,823 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:19:58,047 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '855#(and (= |ULTIMATE.start_getNumbers2_#res#1.offset| 0) (<= 0 |ULTIMATE.start_getNumbers2_#res#1.base|) (<= 10 |ULTIMATE.start_getNumbers_~i~0#1|) (= (select |#valid| |ULTIMATE.start_getNumbers2_#res#1.base|) 0) (<= 1 |ULTIMATE.start_getNumbers_#res#1.base|) (<= 1 |ULTIMATE.start_getNumbers2_~numbers~0#1.base|) (<= 0 |ULTIMATE.start_getNumbers_#res#1.offset|) (<= |ULTIMATE.start_getNumbers_#res#1.offset| 0) (= |ULTIMATE.start_main_~numbers~1#1.offset| |ULTIMATE.start_getNumbers2_#res#1.offset|) (= |~#array~0.offset| 0) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.offset| 0) (= |~#array~0.base| 1) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.base| 1) (<= 0 |ULTIMATE.start_getNumbers2_~numbers~0#1.offset|) (= |#NULL.offset| 0) (<= 10 |ULTIMATE.start_getNumbers2_~i~1#1|) (= |ULTIMATE.start_main_~numbers~1#1.base| |ULTIMATE.start_getNumbers2_#res#1.base|) (<= |ULTIMATE.start_getNumbers_#res#1.base| 1) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 12:19:58,047 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:19:58,047 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:19:58,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-12-14 12:19:58,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314802147] [2022-12-14 12:19:58,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:19:58,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 12:19:58,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:19:58,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 12:19:58,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-12-14 12:19:58,048 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 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 12:19:58,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:19:58,078 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2022-12-14 12:19:58,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 12:19:58,079 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 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 27 [2022-12-14 12:19:58,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:19:58,079 INFO L225 Difference]: With dead ends: 46 [2022-12-14 12:19:58,079 INFO L226 Difference]: Without dead ends: 46 [2022-12-14 12:19:58,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-12-14 12:19:58,080 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 14 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:19:58,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 8 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:19:58,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-12-14 12:19:58,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2022-12-14 12:19:58,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 41 states have internal predecessors, (47), 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 12:19:58,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2022-12-14 12:19:58,084 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 27 [2022-12-14 12:19:58,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:19:58,084 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2022-12-14 12:19:58,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 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 12:19:58,084 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2022-12-14 12:19:58,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-14 12:19:58,084 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:19:58,084 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1] [2022-12-14 12:19:58,089 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf356e6-b503-4b45-8c5c-a7d552c67df8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 12:19:58,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf356e6-b503-4b45-8c5c-a7d552c67df8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 12:19:58,286 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-14 12:19:58,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:19:58,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1299238354, now seen corresponding path program 1 times [2022-12-14 12:19:58,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:19:58,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506169549] [2022-12-14 12:19:58,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:19:58,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:19:58,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:19:58,549 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-12-14 12:19:58,549 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:19:58,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506169549] [2022-12-14 12:19:58,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506169549] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:19:58,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879070221] [2022-12-14 12:19:58,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:19:58,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:19:58,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf356e6-b503-4b45-8c5c-a7d552c67df8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:19:58,551 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf356e6-b503-4b45-8c5c-a7d552c67df8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:19:58,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf356e6-b503-4b45-8c5c-a7d552c67df8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 12:19:58,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:19:58,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 12:19:58,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:19:58,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:19:58,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 12:19:58,782 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-12-14 12:19:58,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:19:59,059 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-12-14 12:19:59,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879070221] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:19:59,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [71729897] [2022-12-14 12:19:59,060 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:19:59,060 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:19:59,061 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:19:59,061 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:19:59,061 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:19:59,066 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 7 treesize of output 6 [2022-12-14 12:19:59,074 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 18 treesize of output 13 [2022-12-14 12:19:59,097 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 116 treesize of output 109 [2022-12-14 12:19:59,122 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 18 treesize of output 14 [2022-12-14 12:19:59,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 12:19:59,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 12:19:59,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:19:59,162 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 12:19:59,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 12:19:59,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:19:59,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:19:59,245 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 12:19:59,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 148 treesize of output 153 [2022-12-14 12:19:59,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:19:59,308 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 12:19:59,308 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 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 12:19:59,323 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:19:59,579 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1116#(and (<= 0 |ULTIMATE.start_getNumbers2_~#numbers2~0#1.base|) (<= 0 |ULTIMATE.start_getNumbers2_~i~1#1|) (<= 10 |ULTIMATE.start_getNumbers_~i~0#1|) (<= 1 |ULTIMATE.start_getNumbers_#res#1.base|) (<= 1 |ULTIMATE.start_getNumbers2_~numbers~0#1.base|) (<= 0 |ULTIMATE.start_getNumbers_#res#1.offset|) (<= |ULTIMATE.start_getNumbers_#res#1.offset| 0) (= |~#array~0.offset| 0) (< |ULTIMATE.start_getNumbers2_~i~1#1| 10) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.offset| 0) (= |~#array~0.base| 1) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.base| 1) (<= 0 |ULTIMATE.start_getNumbers2_~numbers~0#1.offset|) (= |#NULL.offset| 0) (not (<= (+ (* |ULTIMATE.start_getNumbers2_~i~1#1| 4) |ULTIMATE.start_getNumbers2_~numbers~0#1.offset| 4) (select |#length| |ULTIMATE.start_getNumbers2_~numbers~0#1.base|))) (<= |ULTIMATE.start_getNumbers_#res#1.base| 1) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_getNumbers2_~#numbers2~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 12:19:59,580 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:19:59,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:19:59,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2022-12-14 12:19:59,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040127759] [2022-12-14 12:19:59,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:19:59,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 12:19:59,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:19:59,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 12:19:59,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-12-14 12:19:59,581 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 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 12:19:59,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:19:59,710 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2022-12-14 12:19:59,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 12:19:59,710 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 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 27 [2022-12-14 12:19:59,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:19:59,711 INFO L225 Difference]: With dead ends: 45 [2022-12-14 12:19:59,711 INFO L226 Difference]: Without dead ends: 45 [2022-12-14 12:19:59,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2022-12-14 12:19:59,712 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 32 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:19:59,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 18 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:19:59,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-12-14 12:19:59,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2022-12-14 12:19:59,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 42 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 12:19:59,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2022-12-14 12:19:59,714 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 27 [2022-12-14 12:19:59,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:19:59,714 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2022-12-14 12:19:59,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 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 12:19:59,714 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2022-12-14 12:19:59,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 12:19:59,714 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:19:59,714 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 1, 1, 1, 1] [2022-12-14 12:19:59,719 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf356e6-b503-4b45-8c5c-a7d552c67df8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 12:19:59,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf356e6-b503-4b45-8c5c-a7d552c67df8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 12:19:59,916 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-14 12:19:59,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:19:59,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1621683337, now seen corresponding path program 1 times [2022-12-14 12:19:59,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:19:59,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874952080] [2022-12-14 12:19:59,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:19:59,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:19:59,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:20:00,057 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-12-14 12:20:00,057 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:20:00,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874952080] [2022-12-14 12:20:00,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874952080] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:20:00,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007958414] [2022-12-14 12:20:00,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:20:00,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:20:00,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf356e6-b503-4b45-8c5c-a7d552c67df8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:20:00,059 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf356e6-b503-4b45-8c5c-a7d552c67df8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:20:00,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf356e6-b503-4b45-8c5c-a7d552c67df8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 12:20:00,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:20:00,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 12:20:00,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:20:00,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-12-14 12:20:00,166 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-12-14 12:20:00,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:20:00,205 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-12-14 12:20:00,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007958414] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:20:00,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [712022466] [2022-12-14 12:20:00,207 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 12:20:00,207 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:20:00,207 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:20:00,207 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:20:00,207 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:20:00,214 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 7 treesize of output 6 [2022-12-14 12:20:00,222 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 18 treesize of output 13 [2022-12-14 12:20:00,255 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 116 treesize of output 109 [2022-12-14 12:20:00,280 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 18 treesize of output 14 [2022-12-14 12:20:00,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 12:20:00,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 12:20:00,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:20:00,320 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 12:20:00,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 12:20:00,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:20:00,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:20:00,418 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 12:20:00,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 167 [2022-12-14 12:20:00,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:20:00,496 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 12:20:00,497 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 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 12:20:00,509 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:20:00,787 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1390#(and (= (select |#valid| |ULTIMATE.start_getNumbers2_~numbers~0#1.base|) 1) (<= (+ (* |ULTIMATE.start_getNumbers2_~i~1#1| 4) |ULTIMATE.start_getNumbers2_~numbers~0#1.offset| 4) (select |#length| |ULTIMATE.start_getNumbers2_~numbers~0#1.base|)) (<= 0 |ULTIMATE.start_getNumbers2_~#numbers2~0#1.base|) (<= 0 |ULTIMATE.start_getNumbers2_~i~1#1|) (<= 10 |ULTIMATE.start_getNumbers_~i~0#1|) (not (<= (+ (* |ULTIMATE.start_getNumbers2_~i~1#1| 4) |ULTIMATE.start_getNumbers2_~#numbers2~0#1.offset| 4) (select |#length| |ULTIMATE.start_getNumbers2_~#numbers2~0#1.base|))) (<= 1 |ULTIMATE.start_getNumbers_#res#1.base|) (<= 1 |ULTIMATE.start_getNumbers2_~numbers~0#1.base|) (<= 0 |ULTIMATE.start_getNumbers_#res#1.offset|) (<= |ULTIMATE.start_getNumbers_#res#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_getNumbers2_~numbers~0#1.base|) (+ (* |ULTIMATE.start_getNumbers2_~i~1#1| 4) |ULTIMATE.start_getNumbers2_~numbers~0#1.offset|)) |ULTIMATE.start_getNumbers2_#t~mem3#1|) (= |~#array~0.offset| 0) (< |ULTIMATE.start_getNumbers2_~i~1#1| 10) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.offset| 0) (= |~#array~0.base| 1) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.base| 1) (<= 0 |ULTIMATE.start_getNumbers2_~numbers~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_getNumbers_#res#1.base| 1) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_getNumbers2_~#numbers2~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 12:20:00,787 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:20:00,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:20:00,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 9 [2022-12-14 12:20:00,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652964859] [2022-12-14 12:20:00,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:20:00,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 12:20:00,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:20:00,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 12:20:00,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-12-14 12:20:00,789 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 10 states, 9 states have (on average 3.0) internal successors, (27), 10 states have internal predecessors, (27), 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 12:20:00,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:20:00,923 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2022-12-14 12:20:00,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 12:20:00,923 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 10 states have internal predecessors, (27), 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 28 [2022-12-14 12:20:00,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:20:00,924 INFO L225 Difference]: With dead ends: 42 [2022-12-14 12:20:00,924 INFO L226 Difference]: Without dead ends: 42 [2022-12-14 12:20:00,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2022-12-14 12:20:00,924 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 31 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:20:00,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 16 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:20:00,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-12-14 12:20:00,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-12-14 12:20:00,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 38 states have (on average 1.131578947368421) internal successors, (43), 41 states have internal predecessors, (43), 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 12:20:00,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2022-12-14 12:20:00,926 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 28 [2022-12-14 12:20:00,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:20:00,926 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2022-12-14 12:20:00,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 10 states have internal predecessors, (27), 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 12:20:00,926 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2022-12-14 12:20:00,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-14 12:20:00,927 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:20:00,927 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 4, 4, 4, 1, 1, 1, 1] [2022-12-14 12:20:00,931 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf356e6-b503-4b45-8c5c-a7d552c67df8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 12:20:01,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf356e6-b503-4b45-8c5c-a7d552c67df8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 12:20:01,129 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-14 12:20:01,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:20:01,130 INFO L85 PathProgramCache]: Analyzing trace with hash -625715174, now seen corresponding path program 2 times [2022-12-14 12:20:01,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:20:01,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726305181] [2022-12-14 12:20:01,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:20:01,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:20:01,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:20:01,223 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-12-14 12:20:01,224 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:20:01,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726305181] [2022-12-14 12:20:01,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726305181] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:20:01,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248361784] [2022-12-14 12:20:01,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:20:01,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:20:01,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf356e6-b503-4b45-8c5c-a7d552c67df8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:20:01,225 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf356e6-b503-4b45-8c5c-a7d552c67df8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:20:01,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf356e6-b503-4b45-8c5c-a7d552c67df8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 12:20:01,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 12:20:01,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:20:01,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 12:20:01,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:20:01,330 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-12-14 12:20:01,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:20:01,367 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-12-14 12:20:01,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248361784] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:20:01,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1141088918] [2022-12-14 12:20:01,368 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-12-14 12:20:01,368 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:20:01,368 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:20:01,369 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:20:01,369 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:20:01,373 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 7 treesize of output 6 [2022-12-14 12:20:01,382 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 25 treesize of output 20 [2022-12-14 12:20:01,410 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 123 treesize of output 116 [2022-12-14 12:20:01,434 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 18 treesize of output 14 [2022-12-14 12:20:01,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 12:20:01,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 12:20:01,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:20:01,473 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 12:20:01,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 12:20:01,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:20:01,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:20:01,560 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 12:20:01,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 138 treesize of output 157 [2022-12-14 12:20:01,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:20:01,649 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 12:20:01,650 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 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 12:20:01,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-12-14 12:20:01,674 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:20:01,900 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1715#(and (= |ULTIMATE.start_getNumbers2_#res#1.offset| 0) (<= 0 |ULTIMATE.start_getNumbers2_#res#1.base|) (<= 10 |ULTIMATE.start_getNumbers_~i~0#1|) (= (select |#valid| |ULTIMATE.start_getNumbers2_#res#1.base|) 0) (<= 1 |ULTIMATE.start_getNumbers_#res#1.base|) (<= 1 |ULTIMATE.start_getNumbers2_~numbers~0#1.base|) (<= 0 |ULTIMATE.start_getNumbers_#res#1.offset|) (<= |ULTIMATE.start_getNumbers_#res#1.offset| 0) (= |ULTIMATE.start_main_~numbers~1#1.offset| |ULTIMATE.start_getNumbers2_#res#1.offset|) (= |~#array~0.offset| 0) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.offset| 0) (= |~#array~0.base| 1) (<= |ULTIMATE.start_getNumbers2_~numbers~0#1.base| 1) (<= 0 |ULTIMATE.start_getNumbers2_~numbers~0#1.offset|) (= |#NULL.offset| 0) (<= 10 |ULTIMATE.start_getNumbers2_~i~1#1|) (= |ULTIMATE.start_main_~numbers~1#1.base| |ULTIMATE.start_getNumbers2_#res#1.base|) (<= |ULTIMATE.start_getNumbers_#res#1.base| 1) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 12:20:01,900 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:20:01,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:20:01,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-12-14 12:20:01,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205145995] [2022-12-14 12:20:01,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:20:01,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 12:20:01,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:20:01,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 12:20:01,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2022-12-14 12:20:01,902 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 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 12:20:01,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:20:01,948 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2022-12-14 12:20:01,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 12:20:01,949 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 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 36 [2022-12-14 12:20:01,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:20:01,949 INFO L225 Difference]: With dead ends: 64 [2022-12-14 12:20:01,949 INFO L226 Difference]: Without dead ends: 64 [2022-12-14 12:20:01,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2022-12-14 12:20:01,950 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 16 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:20:01,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 8 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:20:01,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-12-14 12:20:01,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2022-12-14 12:20:01,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 58 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 12:20:01,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2022-12-14 12:20:01,954 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 36 [2022-12-14 12:20:01,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:20:01,954 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2022-12-14 12:20:01,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 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 12:20:01,954 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2022-12-14 12:20:01,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-14 12:20:01,955 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:20:01,955 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 5, 4, 4, 1, 1, 1] [2022-12-14 12:20:01,960 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf356e6-b503-4b45-8c5c-a7d552c67df8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 12:20:02,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf356e6-b503-4b45-8c5c-a7d552c67df8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:20:02,156 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-14 12:20:02,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:20:02,158 INFO L85 PathProgramCache]: Analyzing trace with hash -625716273, now seen corresponding path program 2 times [2022-12-14 12:20:02,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:20:02,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377440054] [2022-12-14 12:20:02,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:20:02,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:20:02,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:20:02,415 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-12-14 12:20:02,415 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:20:02,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377440054] [2022-12-14 12:20:02,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377440054] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:20:02,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662340576] [2022-12-14 12:20:02,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:20:02,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:20:02,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf356e6-b503-4b45-8c5c-a7d552c67df8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:20:02,417 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf356e6-b503-4b45-8c5c-a7d552c67df8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:20:02,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf356e6-b503-4b45-8c5c-a7d552c67df8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 12:20:02,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 12:20:02,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:20:02,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 12:20:02,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:20:02,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:20:02,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 12:20:02,675 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-12-14 12:20:02,675 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:20:02,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662340576] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:20:02,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:20:02,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 11 [2022-12-14 12:20:02,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545872560] [2022-12-14 12:20:02,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:20:02,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 12:20:02,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:20:02,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 12:20:02,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-12-14 12:20:02,677 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 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 12:20:02,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:20:02,750 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2022-12-14 12:20:02,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 12:20:02,751 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 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 36 [2022-12-14 12:20:02,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:20:02,751 INFO L225 Difference]: With dead ends: 58 [2022-12-14 12:20:02,751 INFO L226 Difference]: Without dead ends: 58 [2022-12-14 12:20:02,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-12-14 12:20:02,752 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 24 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:20:02,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 8 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:20:02,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-12-14 12:20:02,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-12-14 12:20:02,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 57 states have internal predecessors, (59), 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 12:20:02,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2022-12-14 12:20:02,755 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 36 [2022-12-14 12:20:02,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:20:02,755 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2022-12-14 12:20:02,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 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 12:20:02,755 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2022-12-14 12:20:02,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-14 12:20:02,756 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:20:02,756 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1] [2022-12-14 12:20:02,760 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf356e6-b503-4b45-8c5c-a7d552c67df8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 12:20:02,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf356e6-b503-4b45-8c5c-a7d552c67df8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 12:20:02,957 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-12-14 12:20:02,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:20:02,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1113925894, now seen corresponding path program 3 times [2022-12-14 12:20:02,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:20:02,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66275589] [2022-12-14 12:20:02,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:20:02,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:20:03,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 12:20:03,026 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 12:20:03,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 12:20:03,075 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 12:20:03,075 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 12:20:03,076 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 9 remaining) [2022-12-14 12:20:03,077 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 9 remaining) [2022-12-14 12:20:03,077 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 9 remaining) [2022-12-14 12:20:03,077 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 9 remaining) [2022-12-14 12:20:03,077 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 9 remaining) [2022-12-14 12:20:03,077 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 9 remaining) [2022-12-14 12:20:03,077 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 9 remaining) [2022-12-14 12:20:03,077 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 9 remaining) [2022-12-14 12:20:03,078 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (0 of 9 remaining) [2022-12-14 12:20:03,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 12:20:03,080 INFO L445 BasicCegarLoop]: Path program histogram: [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:20:03,083 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 12:20:03,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 12:20:03 BoogieIcfgContainer [2022-12-14 12:20:03,111 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 12:20:03,112 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 12:20:03,112 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 12:20:03,112 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 12:20:03,112 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:19:54" (3/4) ... [2022-12-14 12:20:03,113 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-12-14 12:20:03,156 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf356e6-b503-4b45-8c5c-a7d552c67df8/bin/utaipan-gh47qXpMRh/witness.graphml [2022-12-14 12:20:03,156 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 12:20:03,157 INFO L158 Benchmark]: Toolchain (without parser) took 9340.65ms. Allocated memory was 174.1MB in the beginning and 209.7MB in the end (delta: 35.7MB). Free memory was 142.1MB in the beginning and 178.6MB in the end (delta: -36.5MB). Peak memory consumption was 120.7MB. Max. memory is 16.1GB. [2022-12-14 12:20:03,157 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 119.5MB. Free memory is still 93.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 12:20:03,157 INFO L158 Benchmark]: CACSL2BoogieTranslator took 210.85ms. Allocated memory is still 174.1MB. Free memory was 142.1MB in the beginning and 132.5MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-12-14 12:20:03,157 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.59ms. Allocated memory is still 174.1MB. Free memory was 132.5MB in the beginning and 130.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 12:20:03,157 INFO L158 Benchmark]: Boogie Preprocessor took 22.12ms. Allocated memory is still 174.1MB. Free memory was 130.9MB in the beginning and 129.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 12:20:03,158 INFO L158 Benchmark]: RCFGBuilder took 270.82ms. Allocated memory is still 174.1MB. Free memory was 129.5MB in the beginning and 115.7MB in the end (delta: 13.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-12-14 12:20:03,158 INFO L158 Benchmark]: TraceAbstraction took 8755.45ms. Allocated memory was 174.1MB in the beginning and 209.7MB in the end (delta: 35.7MB). Free memory was 114.9MB in the beginning and 61.9MB in the end (delta: 53.0MB). Peak memory consumption was 89.3MB. Max. memory is 16.1GB. [2022-12-14 12:20:03,158 INFO L158 Benchmark]: Witness Printer took 44.88ms. Allocated memory is still 209.7MB. Free memory was 61.9MB in the beginning and 178.6MB in the end (delta: -116.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-12-14 12:20:03,159 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 119.5MB. Free memory is still 93.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 210.85ms. Allocated memory is still 174.1MB. Free memory was 142.1MB in the beginning and 132.5MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 30.59ms. Allocated memory is still 174.1MB. Free memory was 132.5MB in the beginning and 130.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 22.12ms. Allocated memory is still 174.1MB. Free memory was 130.9MB in the beginning and 129.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 270.82ms. Allocated memory is still 174.1MB. Free memory was 129.5MB in the beginning and 115.7MB in the end (delta: 13.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 8755.45ms. Allocated memory was 174.1MB in the beginning and 209.7MB in the end (delta: 35.7MB). Free memory was 114.9MB in the beginning and 61.9MB in the end (delta: 53.0MB). Peak memory consumption was 89.3MB. Max. memory is 16.1GB. * Witness Printer took 44.88ms. Allocated memory is still 209.7MB. Free memory was 61.9MB in the beginning and 178.6MB in the end (delta: -116.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: -1]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L1] int array[10]; [L25] CALL, EXPR getNumbers2() [L13] CALL, EXPR getNumbers() [L5] int i = 0; VAL [array={1:0}, i=0] [L5] COND TRUE i < 10 VAL [array={1:0}, i=0] [L6] array[i] = i [L5] ++i VAL [array={1:0}, i=1] [L5] COND TRUE i < 10 VAL [array={1:0}, i=1] [L6] array[i] = i [L5] ++i VAL [array={1:0}, i=2] [L5] COND TRUE i < 10 VAL [array={1:0}, i=2] [L6] array[i] = i [L5] ++i VAL [array={1:0}, i=3] [L5] COND TRUE i < 10 VAL [array={1:0}, i=3] [L6] array[i] = i [L5] ++i VAL [array={1:0}, i=4] [L5] COND TRUE i < 10 VAL [array={1:0}, i=4] [L6] array[i] = i [L5] ++i VAL [array={1:0}, i=5] [L5] COND TRUE i < 10 VAL [array={1:0}, i=5] [L6] array[i] = i [L5] ++i VAL [array={1:0}, i=6] [L5] COND TRUE i < 10 VAL [array={1:0}, i=6] [L6] array[i] = i [L5] ++i VAL [array={1:0}, i=7] [L5] COND TRUE i < 10 VAL [array={1:0}, i=7] [L6] array[i] = i [L5] ++i VAL [array={1:0}, i=8] [L5] COND TRUE i < 10 VAL [array={1:0}, i=8] [L6] array[i] = i [L5] ++i VAL [array={1:0}, i=9] [L5] COND TRUE i < 10 VAL [array={1:0}, i=9] [L6] array[i] = i [L5] ++i VAL [array={1:0}, i=10] [L5] COND FALSE !(i < 10) [L9] return array; [L13] RET, EXPR getNumbers() [L13] int* numbers = getNumbers(); [L15] int numbers2[10]; [L17] int i = 0; VAL [array={1:0}, i=0, numbers={1:0}, numbers2={10:0}] [L17] COND TRUE i < 10 VAL [array={1:0}, i=0, numbers={1:0}, numbers2={10:0}] [L18] EXPR numbers[i] VAL [array={1:0}, i=0, numbers={1:0}, numbers2={10:0}, numbers[i]=0] [L18] numbers2[i] = numbers[i] [L17] ++i VAL [array={1:0}, i=1, numbers={1:0}, numbers2={10:0}] [L17] COND TRUE i < 10 VAL [array={1:0}, i=1, numbers={1:0}, numbers2={10:0}] [L18] EXPR numbers[i] VAL [array={1:0}, i=1, numbers={1:0}, numbers2={10:0}, numbers[i]=1] [L18] numbers2[i] = numbers[i] [L17] ++i VAL [array={1:0}, i=2, numbers={1:0}, numbers2={10:0}] [L17] COND TRUE i < 10 VAL [array={1:0}, i=2, numbers={1:0}, numbers2={10:0}] [L18] EXPR numbers[i] VAL [array={1:0}, i=2, numbers={1:0}, numbers2={10:0}, numbers[i]=2] [L18] numbers2[i] = numbers[i] [L17] ++i VAL [array={1:0}, i=3, numbers={1:0}, numbers2={10:0}] [L17] COND TRUE i < 10 VAL [array={1:0}, i=3, numbers={1:0}, numbers2={10:0}] [L18] EXPR numbers[i] VAL [array={1:0}, i=3, numbers={1:0}, numbers2={10:0}, numbers[i]=3] [L18] numbers2[i] = numbers[i] [L17] ++i VAL [array={1:0}, i=4, numbers={1:0}, numbers2={10:0}] [L17] COND TRUE i < 10 VAL [array={1:0}, i=4, numbers={1:0}, numbers2={10:0}] [L18] EXPR numbers[i] VAL [array={1:0}, i=4, numbers={1:0}, numbers2={10:0}, numbers[i]=4] [L18] numbers2[i] = numbers[i] [L17] ++i VAL [array={1:0}, i=5, numbers={1:0}, numbers2={10:0}] [L17] COND TRUE i < 10 VAL [array={1:0}, i=5, numbers={1:0}, numbers2={10:0}] [L18] EXPR numbers[i] VAL [array={1:0}, i=5, numbers={1:0}, numbers2={10:0}, numbers[i]=5] [L18] numbers2[i] = numbers[i] [L17] ++i VAL [array={1:0}, i=6, numbers={1:0}, numbers2={10:0}] [L17] COND TRUE i < 10 VAL [array={1:0}, i=6, numbers={1:0}, numbers2={10:0}] [L18] EXPR numbers[i] VAL [array={1:0}, i=6, numbers={1:0}, numbers2={10:0}, numbers[i]=6] [L18] numbers2[i] = numbers[i] [L17] ++i VAL [array={1:0}, i=7, numbers={1:0}, numbers2={10:0}] [L17] COND TRUE i < 10 VAL [array={1:0}, i=7, numbers={1:0}, numbers2={10:0}] [L18] EXPR numbers[i] VAL [array={1:0}, i=7, numbers={1:0}, numbers2={10:0}, numbers[i]=7] [L18] numbers2[i] = numbers[i] [L17] ++i VAL [array={1:0}, i=8, numbers={1:0}, numbers2={10:0}] [L17] COND TRUE i < 10 VAL [array={1:0}, i=8, numbers={1:0}, numbers2={10:0}] [L18] EXPR numbers[i] VAL [array={1:0}, i=8, numbers={1:0}, numbers2={10:0}, numbers[i]=8] [L18] numbers2[i] = numbers[i] [L17] ++i VAL [array={1:0}, i=9, numbers={1:0}, numbers2={10:0}] [L17] COND TRUE i < 10 VAL [array={1:0}, i=9, numbers={1:0}, numbers2={10:0}] [L18] EXPR numbers[i] VAL [array={1:0}, i=9, numbers={1:0}, numbers2={10:0}, numbers[i]=9] [L18] numbers2[i] = numbers[i] [L17] ++i VAL [array={1:0}, i=10, numbers={1:0}, numbers2={10:0}] [L17] COND FALSE !(i < 10) [L21] return numbers2; [L21] return numbers2; [L25] RET, EXPR getNumbers2() [L25] int *numbers = getNumbers2(); [L26] numbers[0] = 100 - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 24]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 9 error locations. Started 1 CEGAR loops. OverallTime: 8.7s, OverallIterations: 15, TraceHistogramMax: 10, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 182 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 182 mSDsluCounter, 207 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 129 mSDsCounter, 34 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 477 IncrementalHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 34 mSolverCounterUnsat, 78 mSDtfsCounter, 477 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 493 GetRequests, 372 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=13, InterpolantAutomatonStates: 83, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 14 MinimizatonAttempts, 21 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 512 NumberOfCodeBlocks, 473 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 566 ConstructedInterpolants, 21 QuantifiedInterpolants, 4050 SizeOfPredicates, 12 NumberOfNonLiveVariables, 910 ConjunctsInSsa, 72 ConjunctsInUnsatCore, 27 InterpolantComputations, 8 PerfectInterpolantSequences, 1844/2006 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-12-14 12:20:03,170 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bf356e6-b503-4b45-8c5c-a7d552c67df8/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref)