./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 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a9e733-a290-4583-9a38-7def27209a71/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a9e733-a290-4583-9a38-7def27209a71/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a9e733-a290-4583-9a38-7def27209a71/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a9e733-a290-4583-9a38-7def27209a71/bin/utaipan-Q6hlc19bkW/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/getNumbers2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a9e733-a290-4583-9a38-7def27209a71/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a9e733-a290-4583-9a38-7def27209a71/bin/utaipan-Q6hlc19bkW --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-4e7fbc6 [2022-11-23 15:15:28,871 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:15:28,873 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:15:28,895 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:15:28,895 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:15:28,896 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:15:28,898 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:15:28,899 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:15:28,901 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:15:28,902 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:15:28,903 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:15:28,905 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:15:28,905 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:15:28,906 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:15:28,907 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:15:28,909 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:15:28,910 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:15:28,911 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:15:28,913 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:15:28,915 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:15:28,917 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:15:28,918 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:15:28,919 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:15:28,920 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:15:28,924 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:15:28,924 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:15:28,925 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:15:28,926 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:15:28,926 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:15:28,927 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:15:28,928 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:15:28,929 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:15:28,930 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:15:28,931 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:15:28,932 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:15:28,932 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:15:28,933 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:15:28,934 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:15:28,934 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:15:28,935 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:15:28,936 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:15:28,937 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a9e733-a290-4583-9a38-7def27209a71/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-23 15:15:28,961 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:15:28,962 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:15:28,962 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:15:28,962 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:15:28,982 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:15:28,982 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:15:28,983 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:15:28,983 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:15:28,983 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:15:28,983 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:15:28,984 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:15:28,984 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:15:28,984 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:15:28,984 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:15:28,984 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:15:28,985 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:15:28,985 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:15:28,985 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:15:28,986 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 15:15:28,986 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 15:15:28,986 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:15:28,987 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:15:28,987 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 15:15:28,987 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:15:28,987 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:15:28,988 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:15:28,988 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 15:15:28,988 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 15:15:28,988 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 15:15:28,989 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:15:28,989 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 15:15:28,989 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:15:28,989 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:15:28,990 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:15:28,990 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:15:28,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:15:28,990 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:15:28,990 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:15:28,991 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:15:28,991 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:15:28,991 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:15:28,991 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:15:28,992 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_c5a9e733-a290-4583-9a38-7def27209a71/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a9e733-a290-4583-9a38-7def27209a71/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cf0bb070a6f67963fcaf42c16427fd9b591ad6ca597a21a650e9cf23fa51a6dd [2022-11-23 15:15:29,282 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:15:29,317 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:15:29,320 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:15:29,321 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:15:29,322 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:15:29,323 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a9e733-a290-4583-9a38-7def27209a71/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/memsafety-ext3/getNumbers2.c [2022-11-23 15:15:32,436 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:15:32,666 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:15:32,667 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a9e733-a290-4583-9a38-7def27209a71/sv-benchmarks/c/memsafety-ext3/getNumbers2.c [2022-11-23 15:15:32,673 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a9e733-a290-4583-9a38-7def27209a71/bin/utaipan-Q6hlc19bkW/data/cb52389dd/657f35c7e18d4e96b60282a8ce29892b/FLAGfae90d861 [2022-11-23 15:15:32,689 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a9e733-a290-4583-9a38-7def27209a71/bin/utaipan-Q6hlc19bkW/data/cb52389dd/657f35c7e18d4e96b60282a8ce29892b [2022-11-23 15:15:32,692 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:15:32,693 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:15:32,694 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:15:32,695 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:15:32,698 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:15:32,699 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:15:32" (1/1) ... [2022-11-23 15:15:32,700 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@379bb49c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:32, skipping insertion in model container [2022-11-23 15:15:32,701 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:15:32" (1/1) ... [2022-11-23 15:15:32,709 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:15:32,721 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:15:32,875 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:15:32,888 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:15:32,905 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:15:32,920 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:15:32,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:32 WrapperNode [2022-11-23 15:15:32,921 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:15:32,922 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:15:32,922 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:15:32,923 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:15:32,930 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:32" (1/1) ... [2022-11-23 15:15:32,938 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:32" (1/1) ... [2022-11-23 15:15:32,960 INFO L138 Inliner]: procedures = 10, calls = 12, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 46 [2022-11-23 15:15:32,961 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:15:32,962 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:15:32,962 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:15:32,963 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:15:32,971 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:32" (1/1) ... [2022-11-23 15:15:32,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:32" (1/1) ... [2022-11-23 15:15:32,986 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:32" (1/1) ... [2022-11-23 15:15:32,986 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:32" (1/1) ... [2022-11-23 15:15:32,991 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:32" (1/1) ... [2022-11-23 15:15:32,994 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:32" (1/1) ... [2022-11-23 15:15:33,002 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:32" (1/1) ... [2022-11-23 15:15:33,006 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:32" (1/1) ... [2022-11-23 15:15:33,012 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:15:33,013 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:15:33,013 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:15:33,014 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:15:33,014 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:32" (1/1) ... [2022-11-23 15:15:33,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:15:33,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a9e733-a290-4583-9a38-7def27209a71/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:15:33,054 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a9e733-a290-4583-9a38-7def27209a71/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:15:33,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a9e733-a290-4583-9a38-7def27209a71/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:15:33,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 15:15:33,108 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:15:33,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:15:33,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:15:33,109 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 15:15:33,109 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 15:15:33,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 15:15:33,202 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:15:33,205 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:15:33,435 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:15:33,493 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:15:33,507 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-23 15:15:33,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:15:33 BoogieIcfgContainer [2022-11-23 15:15:33,520 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:15:33,523 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:15:33,523 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:15:33,526 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:15:33,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:15:32" (1/3) ... [2022-11-23 15:15:33,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16d209f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:15:33, skipping insertion in model container [2022-11-23 15:15:33,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:32" (2/3) ... [2022-11-23 15:15:33,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16d209f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:15:33, skipping insertion in model container [2022-11-23 15:15:33,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:15:33" (3/3) ... [2022-11-23 15:15:33,530 INFO L112 eAbstractionObserver]: Analyzing ICFG getNumbers2.c [2022-11-23 15:15:33,568 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:15:33,570 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2022-11-23 15:15:33,613 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:15:33,620 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;@6af545f4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:15:33,620 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2022-11-23 15:15:33,624 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) [2022-11-23 15:15:33,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-23 15:15:33,629 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:15:33,630 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-23 15:15:33,631 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)] === [2022-11-23 15:15:33,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:15:33,637 INFO L85 PathProgramCache]: Analyzing trace with hash 86812, now seen corresponding path program 1 times [2022-11-23 15:15:33,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:15:33,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241004962] [2022-11-23 15:15:33,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:15:33,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:15:33,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:15:33,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:15:33,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:15:33,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241004962] [2022-11-23 15:15:33,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241004962] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:15:33,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:15:33,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 15:15:33,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042519334] [2022-11-23 15:15:33,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:15:33,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:15:33,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:15:33,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:15:33,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:15:33,935 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) [2022-11-23 15:15:33,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:15:33,997 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2022-11-23 15:15:34,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:15:34,005 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 [2022-11-23 15:15:34,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:15:34,014 INFO L225 Difference]: With dead ends: 17 [2022-11-23 15:15:34,014 INFO L226 Difference]: Without dead ends: 16 [2022-11-23 15:15:34,016 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 [2022-11-23 15:15:34,022 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 [2022-11-23 15:15:34,024 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] [2022-11-23 15:15:34,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-23 15:15:34,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-23 15:15:34,050 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) [2022-11-23 15:15:34,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-11-23 15:15:34,052 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 3 [2022-11-23 15:15:34,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:15:34,052 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-11-23 15:15:34,053 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) [2022-11-23 15:15:34,053 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-11-23 15:15:34,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-23 15:15:34,053 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:15:34,053 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-23 15:15:34,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 15:15:34,054 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)] === [2022-11-23 15:15:34,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:15:34,055 INFO L85 PathProgramCache]: Analyzing trace with hash 86813, now seen corresponding path program 1 times [2022-11-23 15:15:34,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:15:34,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786219672] [2022-11-23 15:15:34,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:15:34,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:15:34,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:15:34,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:15:34,178 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:15:34,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786219672] [2022-11-23 15:15:34,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786219672] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:15:34,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:15:34,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 15:15:34,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574026596] [2022-11-23 15:15:34,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:15:34,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:15:34,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:15:34,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:15:34,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:15:34,182 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) [2022-11-23 15:15:34,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:15:34,225 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2022-11-23 15:15:34,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:15:34,226 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 [2022-11-23 15:15:34,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:15:34,227 INFO L225 Difference]: With dead ends: 18 [2022-11-23 15:15:34,228 INFO L226 Difference]: Without dead ends: 18 [2022-11-23 15:15:34,231 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 [2022-11-23 15:15:34,233 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 [2022-11-23 15:15:34,234 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] [2022-11-23 15:15:34,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-23 15:15:34,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-23 15:15:34,247 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) [2022-11-23 15:15:34,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-11-23 15:15:34,250 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 3 [2022-11-23 15:15:34,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:15:34,250 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-11-23 15:15:34,251 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) [2022-11-23 15:15:34,252 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-11-23 15:15:34,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-23 15:15:34,253 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:15:34,254 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2022-11-23 15:15:34,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 15:15:34,255 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)] === [2022-11-23 15:15:34,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:15:34,258 INFO L85 PathProgramCache]: Analyzing trace with hash 83467978, now seen corresponding path program 1 times [2022-11-23 15:15:34,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:15:34,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816720022] [2022-11-23 15:15:34,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:15:34,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:15:34,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:15:34,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:15:34,670 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:15:34,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816720022] [2022-11-23 15:15:34,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816720022] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:15:34,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245638526] [2022-11-23 15:15:34,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:15:34,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:15:34,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a9e733-a290-4583-9a38-7def27209a71/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:15:34,678 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a9e733-a290-4583-9a38-7def27209a71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:15:34,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a9e733-a290-4583-9a38-7def27209a71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 15:15:34,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:15:34,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 15:15:34,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:15:34,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:15:34,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:15:34,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:15:34,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245638526] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:15:34,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1567983937] [2022-11-23 15:15:34,954 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2022-11-23 15:15:34,954 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:15:34,960 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:15:34,966 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:15:34,967 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:15:35,036 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 [2022-11-23 15:15:35,090 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 [2022-11-23 15:15:35,208 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 [2022-11-23 15:15:35,301 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 [2022-11-23 15:15:35,319 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:15:35,436 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 [2022-11-23 15:15:35,437 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:15:35,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:15:35,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2022-11-23 15:15:35,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207571550] [2022-11-23 15:15:35,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:15:35,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 15:15:35,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:15:35,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 15:15:35,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-23 15:15:35,440 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) [2022-11-23 15:15:35,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:15:35,629 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2022-11-23 15:15:35,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 15:15:35,630 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 [2022-11-23 15:15:35,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:15:35,632 INFO L225 Difference]: With dead ends: 22 [2022-11-23 15:15:35,632 INFO L226 Difference]: Without dead ends: 22 [2022-11-23 15:15:35,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-11-23 15:15:35,637 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 16 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:15:35,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 35 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:15:35,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-23 15:15:35,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-11-23 15:15:35,651 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) [2022-11-23 15:15:35,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-11-23 15:15:35,652 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 5 [2022-11-23 15:15:35,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:15:35,652 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-11-23 15:15:35,654 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) [2022-11-23 15:15:35,655 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-11-23 15:15:35,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-23 15:15:35,655 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:15:35,656 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1] [2022-11-23 15:15:35,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a9e733-a290-4583-9a38-7def27209a71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 15:15:35,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a9e733-a290-4583-9a38-7def27209a71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:15:35,861 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)] === [2022-11-23 15:15:35,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:15:35,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1934156450, now seen corresponding path program 1 times [2022-11-23 15:15:35,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:15:35,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404489181] [2022-11-23 15:15:35,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:15:35,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:15:35,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:15:35,950 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 15:15:35,951 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:15:35,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404489181] [2022-11-23 15:15:35,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404489181] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:15:35,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:15:35,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:15:35,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082520849] [2022-11-23 15:15:35,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:15:35,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:15:35,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:15:35,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:15:35,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:15:35,954 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) [2022-11-23 15:15:35,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:15:35,986 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2022-11-23 15:15:35,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:15:35,986 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 [2022-11-23 15:15:35,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:15:35,987 INFO L225 Difference]: With dead ends: 29 [2022-11-23 15:15:35,988 INFO L226 Difference]: Without dead ends: 29 [2022-11-23 15:15:35,988 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 [2022-11-23 15:15:35,991 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 [2022-11-23 15:15:35,994 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] [2022-11-23 15:15:35,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-23 15:15:35,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 23. [2022-11-23 15:15:35,998 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) [2022-11-23 15:15:35,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2022-11-23 15:15:35,999 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 12 [2022-11-23 15:15:36,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:15:36,000 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2022-11-23 15:15:36,000 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) [2022-11-23 15:15:36,000 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2022-11-23 15:15:36,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-23 15:15:36,001 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:15:36,001 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1] [2022-11-23 15:15:36,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 15:15:36,002 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)] === [2022-11-23 15:15:36,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:15:36,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1934157549, now seen corresponding path program 1 times [2022-11-23 15:15:36,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:15:36,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378280028] [2022-11-23 15:15:36,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:15:36,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:15:36,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:15:36,132 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:15:36,133 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:15:36,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378280028] [2022-11-23 15:15:36,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378280028] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:15:36,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173540645] [2022-11-23 15:15:36,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:15:36,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:15:36,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a9e733-a290-4583-9a38-7def27209a71/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:15:36,135 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a9e733-a290-4583-9a38-7def27209a71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:15:36,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a9e733-a290-4583-9a38-7def27209a71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 15:15:36,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:15:36,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 15:15:36,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:15:36,233 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:15:36,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:15:36,325 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:15:36,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173540645] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:15:36,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [657553013] [2022-11-23 15:15:36,328 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-23 15:15:36,328 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:15:36,328 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:15:36,328 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:15:36,329 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:15:36,340 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 [2022-11-23 15:15:36,357 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 [2022-11-23 15:15:36,403 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 [2022-11-23 15:15:36,466 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 18 treesize of output 14 [2022-11-23 15:15:36,482 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 [2022-11-23 15:15:36,490 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 [2022-11-23 15:15:36,503 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:15:36,723 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 [2022-11-23 15:15:36,724 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:15:36,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:15:36,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-23 15:15:36,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491579683] [2022-11-23 15:15:36,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:15:36,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 15:15:36,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:15:36,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 15:15:36,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2022-11-23 15:15:36,726 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) [2022-11-23 15:15:36,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:15:36,787 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2022-11-23 15:15:36,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 15:15:36,788 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 [2022-11-23 15:15:36,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:15:36,788 INFO L225 Difference]: With dead ends: 35 [2022-11-23 15:15:36,788 INFO L226 Difference]: Without dead ends: 35 [2022-11-23 15:15:36,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2022-11-23 15:15:36,789 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 10 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:15:36,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 45 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:15:36,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-23 15:15:36,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-11-23 15:15:36,793 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) [2022-11-23 15:15:36,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2022-11-23 15:15:36,793 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 12 [2022-11-23 15:15:36,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:15:36,794 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2022-11-23 15:15:36,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:15:36,794 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2022-11-23 15:15:36,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-23 15:15:36,795 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:15:36,795 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1] [2022-11-23 15:15:36,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a9e733-a290-4583-9a38-7def27209a71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 15:15:36,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a9e733-a290-4583-9a38-7def27209a71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:15:36,995 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)] === [2022-11-23 15:15:36,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:15:36,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1639114629, now seen corresponding path program 2 times [2022-11-23 15:15:36,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:15:36,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338197193] [2022-11-23 15:15:36,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:15:36,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:15:37,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:15:37,256 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-23 15:15:37,256 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:15:37,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338197193] [2022-11-23 15:15:37,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338197193] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:15:37,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:15:37,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:15:37,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060974545] [2022-11-23 15:15:37,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:15:37,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:15:37,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:15:37,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:15:37,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:15:37,258 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) [2022-11-23 15:15:37,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:15:37,311 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2022-11-23 15:15:37,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:15:37,312 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 [2022-11-23 15:15:37,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:15:37,315 INFO L225 Difference]: With dead ends: 40 [2022-11-23 15:15:37,315 INFO L226 Difference]: Without dead ends: 40 [2022-11-23 15:15:37,315 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 [2022-11-23 15:15:37,316 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 [2022-11-23 15:15:37,316 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] [2022-11-23 15:15:37,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-23 15:15:37,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2022-11-23 15:15:37,323 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) [2022-11-23 15:15:37,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2022-11-23 15:15:37,323 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 24 [2022-11-23 15:15:37,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:15:37,324 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2022-11-23 15:15:37,324 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) [2022-11-23 15:15:37,324 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2022-11-23 15:15:37,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-23 15:15:37,325 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:15:37,325 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1] [2022-11-23 15:15:37,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 15:15:37,325 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)] === [2022-11-23 15:15:37,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:15:37,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1639114628, now seen corresponding path program 1 times [2022-11-23 15:15:37,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:15:37,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710476528] [2022-11-23 15:15:37,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:15:37,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:15:37,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:15:37,444 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-23 15:15:37,444 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:15:37,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710476528] [2022-11-23 15:15:37,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710476528] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:15:37,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:15:37,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:15:37,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448599239] [2022-11-23 15:15:37,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:15:37,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:15:37,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:15:37,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:15:37,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:15:37,446 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) [2022-11-23 15:15:37,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:15:37,476 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2022-11-23 15:15:37,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:15:37,477 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 [2022-11-23 15:15:37,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:15:37,477 INFO L225 Difference]: With dead ends: 35 [2022-11-23 15:15:37,478 INFO L226 Difference]: Without dead ends: 35 [2022-11-23 15:15:37,478 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 [2022-11-23 15:15:37,479 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 [2022-11-23 15:15:37,479 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] [2022-11-23 15:15:37,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-23 15:15:37,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-11-23 15:15:37,481 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) [2022-11-23 15:15:37,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2022-11-23 15:15:37,482 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 24 [2022-11-23 15:15:37,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:15:37,482 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2022-11-23 15:15:37,482 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) [2022-11-23 15:15:37,482 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2022-11-23 15:15:37,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-23 15:15:37,483 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:15:37,483 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1] [2022-11-23 15:15:37,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 15:15:37,483 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)] === [2022-11-23 15:15:37,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:15:37,484 INFO L85 PathProgramCache]: Analyzing trace with hash -727054081, now seen corresponding path program 1 times [2022-11-23 15:15:37,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:15:37,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944548741] [2022-11-23 15:15:37,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:15:37,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:15:37,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:15:37,560 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-23 15:15:37,560 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:15:37,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944548741] [2022-11-23 15:15:37,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944548741] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:15:37,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:15:37,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:15:37,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764833631] [2022-11-23 15:15:37,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:15:37,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:15:37,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:15:37,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:15:37,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:15:37,562 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) [2022-11-23 15:15:37,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:15:37,581 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2022-11-23 15:15:37,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:15:37,581 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 [2022-11-23 15:15:37,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:15:37,582 INFO L225 Difference]: With dead ends: 34 [2022-11-23 15:15:37,582 INFO L226 Difference]: Without dead ends: 34 [2022-11-23 15:15:37,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:15:37,583 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 [2022-11-23 15:15:37,583 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] [2022-11-23 15:15:37,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-23 15:15:37,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-11-23 15:15:37,586 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) [2022-11-23 15:15:37,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2022-11-23 15:15:37,586 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 25 [2022-11-23 15:15:37,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:15:37,586 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2022-11-23 15:15:37,587 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) [2022-11-23 15:15:37,587 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2022-11-23 15:15:37,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-23 15:15:37,587 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:15:37,587 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1] [2022-11-23 15:15:37,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 15:15:37,588 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)] === [2022-11-23 15:15:37,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:15:37,589 INFO L85 PathProgramCache]: Analyzing trace with hash -727054080, now seen corresponding path program 1 times [2022-11-23 15:15:37,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:15:37,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780236197] [2022-11-23 15:15:37,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:15:37,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:15:37,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:15:37,712 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-23 15:15:37,712 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:15:37,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780236197] [2022-11-23 15:15:37,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780236197] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:15:37,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:15:37,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:15:37,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92450896] [2022-11-23 15:15:37,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:15:37,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:15:37,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:15:37,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:15:37,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:15:37,714 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) [2022-11-23 15:15:37,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:15:37,747 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2022-11-23 15:15:37,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:15:37,748 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 [2022-11-23 15:15:37,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:15:37,748 INFO L225 Difference]: With dead ends: 35 [2022-11-23 15:15:37,748 INFO L226 Difference]: Without dead ends: 35 [2022-11-23 15:15:37,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:15:37,749 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 [2022-11-23 15:15:37,749 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] [2022-11-23 15:15:37,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-23 15:15:37,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-11-23 15:15:37,752 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) [2022-11-23 15:15:37,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2022-11-23 15:15:37,752 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 25 [2022-11-23 15:15:37,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:15:37,752 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2022-11-23 15:15:37,753 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) [2022-11-23 15:15:37,753 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2022-11-23 15:15:37,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-23 15:15:37,753 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:15:37,753 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:15:37,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 15:15:37,754 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)] === [2022-11-23 15:15:37,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:15:37,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1380720579, now seen corresponding path program 1 times [2022-11-23 15:15:37,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:15:37,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67554760] [2022-11-23 15:15:37,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:15:37,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:15:37,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:15:37,816 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-23 15:15:37,817 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:15:37,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67554760] [2022-11-23 15:15:37,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67554760] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:15:37,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605716032] [2022-11-23 15:15:37,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:15:37,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:15:37,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a9e733-a290-4583-9a38-7def27209a71/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:15:37,818 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a9e733-a290-4583-9a38-7def27209a71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:15:37,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a9e733-a290-4583-9a38-7def27209a71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 15:15:37,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:15:37,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:15:37,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:15:37,933 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-23 15:15:37,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:15:37,952 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-23 15:15:37,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605716032] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:15:37,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1829777905] [2022-11-23 15:15:37,955 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 15:15:37,955 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:15:37,955 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:15:37,955 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:15:37,955 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:15:37,965 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 [2022-11-23 15:15:37,979 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 [2022-11-23 15:15:38,017 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 [2022-11-23 15:15:38,056 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 [2022-11-23 15:15:38,073 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 [2022-11-23 15:15:38,084 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 [2022-11-23 15:15:38,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:15:38,120 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:15:38,121 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 [2022-11-23 15:15:38,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:15:38,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:15:38,268 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 15:15:38,269 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 [2022-11-23 15:15:38,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:15:38,444 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:15:38,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 15:15:38,462 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 [2022-11-23 15:15:38,476 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:15:38,826 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 [2022-11-23 15:15:38,826 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:15:38,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:15:38,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-23 15:15:38,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631343572] [2022-11-23 15:15:38,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:15:38,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:15:38,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:15:38,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:15:38,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-11-23 15:15:38,828 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) [2022-11-23 15:15:38,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:15:38,869 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2022-11-23 15:15:38,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:15:38,870 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 [2022-11-23 15:15:38,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:15:38,870 INFO L225 Difference]: With dead ends: 46 [2022-11-23 15:15:38,871 INFO L226 Difference]: Without dead ends: 46 [2022-11-23 15:15:38,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-11-23 15:15:38,872 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 22 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:15:38,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 8 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:15:38,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-23 15:15:38,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2022-11-23 15:15:38,874 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) [2022-11-23 15:15:38,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2022-11-23 15:15:38,875 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 27 [2022-11-23 15:15:38,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:15:38,875 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2022-11-23 15:15:38,875 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) [2022-11-23 15:15:38,876 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2022-11-23 15:15:38,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-23 15:15:38,876 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:15:38,876 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1] [2022-11-23 15:15:38,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a9e733-a290-4583-9a38-7def27209a71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 15:15:39,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a9e733-a290-4583-9a38-7def27209a71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 15:15:39,082 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)] === [2022-11-23 15:15:39,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:15:39,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1380719480, now seen corresponding path program 1 times [2022-11-23 15:15:39,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:15:39,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833797839] [2022-11-23 15:15:39,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:15:39,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:15:39,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:15:39,299 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-23 15:15:39,299 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:15:39,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833797839] [2022-11-23 15:15:39,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833797839] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:15:39,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848428542] [2022-11-23 15:15:39,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:15:39,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:15:39,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a9e733-a290-4583-9a38-7def27209a71/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:15:39,308 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a9e733-a290-4583-9a38-7def27209a71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:15:39,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a9e733-a290-4583-9a38-7def27209a71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 15:15:39,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:15:39,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-23 15:15:39,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:15:39,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:15:39,623 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 [2022-11-23 15:15:39,686 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-23 15:15:39,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:15:42,248 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-23 15:15:42,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848428542] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:15:42,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [349056330] [2022-11-23 15:15:42,251 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-23 15:15:42,251 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:15:42,252 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:15:42,252 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:15:42,252 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:15:42,261 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 [2022-11-23 15:15:42,276 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 [2022-11-23 15:15:42,311 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 [2022-11-23 15:15:42,344 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 [2022-11-23 15:15:42,357 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 [2022-11-23 15:15:42,378 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 [2022-11-23 15:15:42,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:15:42,414 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:15:42,414 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 [2022-11-23 15:15:42,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:15:42,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:15:42,542 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 15:15:42,542 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 [2022-11-23 15:15:42,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:15:42,614 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:15:42,620 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 [2022-11-23 15:15:42,636 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:15:43,107 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 [2022-11-23 15:15:43,107 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:15:43,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:15:43,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2022-11-23 15:15:43,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731960156] [2022-11-23 15:15:43,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:15:43,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-23 15:15:43,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:15:43,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-23 15:15:43,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-11-23 15:15:43,109 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) [2022-11-23 15:15:43,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:15:43,332 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2022-11-23 15:15:43,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 15:15:43,332 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 [2022-11-23 15:15:43,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:15:43,333 INFO L225 Difference]: With dead ends: 45 [2022-11-23 15:15:43,333 INFO L226 Difference]: Without dead ends: 45 [2022-11-23 15:15:43,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2022-11-23 15:15:43,334 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 33 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:15:43,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 18 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:15:43,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-23 15:15:43,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2022-11-23 15:15:43,337 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) [2022-11-23 15:15:43,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2022-11-23 15:15:43,337 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 27 [2022-11-23 15:15:43,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:15:43,338 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2022-11-23 15:15:43,338 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) [2022-11-23 15:15:43,338 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2022-11-23 15:15:43,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-23 15:15:43,338 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:15:43,339 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 1, 1, 1, 1] [2022-11-23 15:15:43,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a9e733-a290-4583-9a38-7def27209a71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 15:15:43,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a9e733-a290-4583-9a38-7def27209a71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-23 15:15:43,545 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)] === [2022-11-23 15:15:43,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:15:43,545 INFO L85 PathProgramCache]: Analyzing trace with hash -147369107, now seen corresponding path program 1 times [2022-11-23 15:15:43,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:15:43,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323790409] [2022-11-23 15:15:43,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:15:43,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:15:43,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:15:43,737 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-11-23 15:15:43,737 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:15:43,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323790409] [2022-11-23 15:15:43,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323790409] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:15:43,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212548525] [2022-11-23 15:15:43,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:15:43,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:15:43,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a9e733-a290-4583-9a38-7def27209a71/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:15:43,739 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a9e733-a290-4583-9a38-7def27209a71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:15:43,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a9e733-a290-4583-9a38-7def27209a71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 15:15:43,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:15:43,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 15:15:43,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:15:43,850 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 [2022-11-23 15:15:43,913 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-23 15:15:43,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:15:43,985 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-23 15:15:43,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212548525] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:15:43,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [469846996] [2022-11-23 15:15:43,987 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-23 15:15:43,988 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:15:43,988 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:15:43,988 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:15:43,988 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:15:43,998 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 [2022-11-23 15:15:44,010 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 [2022-11-23 15:15:44,042 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 [2022-11-23 15:15:44,073 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 [2022-11-23 15:15:44,085 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 [2022-11-23 15:15:44,091 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 [2022-11-23 15:15:44,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:15:44,124 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:15:44,124 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 [2022-11-23 15:15:44,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:15:44,198 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:15:44,277 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 15:15:44,278 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 [2022-11-23 15:15:44,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:15:44,425 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:15:44,428 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 [2022-11-23 15:15:44,445 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:15:44,930 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 [2022-11-23 15:15:44,930 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:15:44,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:15:44,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 9 [2022-11-23 15:15:44,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069494742] [2022-11-23 15:15:44,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:15:44,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 15:15:44,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:15:44,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 15:15:44,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-11-23 15:15:44,932 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) [2022-11-23 15:15:45,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:15:45,162 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2022-11-23 15:15:45,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 15:15:45,163 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 [2022-11-23 15:15:45,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:15:45,164 INFO L225 Difference]: With dead ends: 42 [2022-11-23 15:15:45,164 INFO L226 Difference]: Without dead ends: 42 [2022-11-23 15:15:45,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2022-11-23 15:15:45,165 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 31 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:15:45,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 16 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:15:45,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-23 15:15:45,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-11-23 15:15:45,168 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) [2022-11-23 15:15:45,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2022-11-23 15:15:45,169 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 28 [2022-11-23 15:15:45,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:15:45,169 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2022-11-23 15:15:45,169 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) [2022-11-23 15:15:45,170 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2022-11-23 15:15:45,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-23 15:15:45,170 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:15:45,170 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 4, 4, 4, 1, 1, 1, 1] [2022-11-23 15:15:45,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a9e733-a290-4583-9a38-7def27209a71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 15:15:45,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a9e733-a290-4583-9a38-7def27209a71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:15:45,380 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)] === [2022-11-23 15:15:45,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:15:45,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1549254128, now seen corresponding path program 2 times [2022-11-23 15:15:45,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:15:45,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111850093] [2022-11-23 15:15:45,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:15:45,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:15:45,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:15:45,520 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-23 15:15:45,520 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:15:45,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111850093] [2022-11-23 15:15:45,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111850093] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:15:45,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007969621] [2022-11-23 15:15:45,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:15:45,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:15:45,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a9e733-a290-4583-9a38-7def27209a71/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:15:45,523 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a9e733-a290-4583-9a38-7def27209a71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:15:45,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a9e733-a290-4583-9a38-7def27209a71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 15:15:45,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-23 15:15:45,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:15:45,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 15:15:45,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:15:45,689 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-23 15:15:45,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:15:45,765 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-23 15:15:45,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007969621] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:15:45,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [344067719] [2022-11-23 15:15:45,768 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 15:15:45,768 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:15:45,768 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:15:45,769 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:15:45,769 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:15:45,779 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 [2022-11-23 15:15:45,799 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 [2022-11-23 15:15:45,835 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 [2022-11-23 15:15:45,872 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 [2022-11-23 15:15:45,884 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 [2022-11-23 15:15:45,891 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 [2022-11-23 15:15:45,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:15:45,924 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:15:45,925 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 [2022-11-23 15:15:46,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:15:46,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:15:46,059 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 15:15:46,059 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 [2022-11-23 15:15:46,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:15:46,194 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:15:46,195 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 [2022-11-23 15:15:46,213 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 [2022-11-23 15:15:46,226 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:15:46,607 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 [2022-11-23 15:15:46,607 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:15:46,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:15:46,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-11-23 15:15:46,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120885535] [2022-11-23 15:15:46,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:15:46,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 15:15:46,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:15:46,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 15:15:46,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2022-11-23 15:15:46,609 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) [2022-11-23 15:15:46,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:15:46,694 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2022-11-23 15:15:46,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 15:15:46,695 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 [2022-11-23 15:15:46,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:15:46,695 INFO L225 Difference]: With dead ends: 64 [2022-11-23 15:15:46,695 INFO L226 Difference]: Without dead ends: 64 [2022-11-23 15:15:46,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2022-11-23 15:15:46,696 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 42 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:15:46,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 8 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:15:46,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-23 15:15:46,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2022-11-23 15:15:46,699 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) [2022-11-23 15:15:46,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2022-11-23 15:15:46,700 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 36 [2022-11-23 15:15:46,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:15:46,700 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2022-11-23 15:15:46,701 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) [2022-11-23 15:15:46,701 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2022-11-23 15:15:46,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-23 15:15:46,701 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:15:46,701 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 5, 4, 4, 1, 1, 1] [2022-11-23 15:15:46,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a9e733-a290-4583-9a38-7def27209a71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 15:15:46,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a9e733-a290-4583-9a38-7def27209a71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-23 15:15:46,916 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)] === [2022-11-23 15:15:46,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:15:46,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1549255227, now seen corresponding path program 2 times [2022-11-23 15:15:46,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:15:46,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126299934] [2022-11-23 15:15:46,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:15:46,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:15:46,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:15:47,284 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-23 15:15:47,284 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:15:47,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126299934] [2022-11-23 15:15:47,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126299934] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:15:47,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531966045] [2022-11-23 15:15:47,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:15:47,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:15:47,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a9e733-a290-4583-9a38-7def27209a71/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:15:47,287 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a9e733-a290-4583-9a38-7def27209a71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:15:47,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a9e733-a290-4583-9a38-7def27209a71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 15:15:47,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 15:15:47,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:15:47,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 15:15:47,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:15:47,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:15:47,623 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 [2022-11-23 15:15:47,816 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-11-23 15:15:47,817 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:15:47,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531966045] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:15:47,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:15:47,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 11 [2022-11-23 15:15:47,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609103135] [2022-11-23 15:15:47,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:15:47,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:15:47,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:15:47,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:15:47,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-11-23 15:15:47,819 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) [2022-11-23 15:15:47,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:15:47,940 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2022-11-23 15:15:47,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 15:15:47,941 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 [2022-11-23 15:15:47,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:15:47,941 INFO L225 Difference]: With dead ends: 58 [2022-11-23 15:15:47,942 INFO L226 Difference]: Without dead ends: 58 [2022-11-23 15:15:47,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-11-23 15:15:47,942 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 26 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:15:47,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 8 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:15:47,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-23 15:15:47,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-11-23 15:15:47,947 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) [2022-11-23 15:15:47,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2022-11-23 15:15:47,947 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 36 [2022-11-23 15:15:47,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:15:47,948 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2022-11-23 15:15:47,948 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) [2022-11-23 15:15:47,948 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2022-11-23 15:15:47,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-23 15:15:47,949 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:15:47,949 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1] [2022-11-23 15:15:47,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a9e733-a290-4583-9a38-7def27209a71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 15:15:48,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a9e733-a290-4583-9a38-7def27209a71/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-23 15:15:48,162 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)] === [2022-11-23 15:15:48,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:15:48,162 INFO L85 PathProgramCache]: Analyzing trace with hash 75526000, now seen corresponding path program 3 times [2022-11-23 15:15:48,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:15:48,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305868376] [2022-11-23 15:15:48,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:15:48,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:15:48,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 15:15:48,216 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 15:15:48,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 15:15:48,296 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-23 15:15:48,297 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 15:15:48,298 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 9 remaining) [2022-11-23 15:15:48,300 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 9 remaining) [2022-11-23 15:15:48,300 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 9 remaining) [2022-11-23 15:15:48,300 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 9 remaining) [2022-11-23 15:15:48,301 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 9 remaining) [2022-11-23 15:15:48,301 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 9 remaining) [2022-11-23 15:15:48,301 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 9 remaining) [2022-11-23 15:15:48,301 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 9 remaining) [2022-11-23 15:15:48,301 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (0 of 9 remaining) [2022-11-23 15:15:48,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-23 15:15:48,305 INFO L444 BasicCegarLoop]: Path program histogram: [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:15:48,309 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-23 15:15:48,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 03:15:48 BoogieIcfgContainer [2022-11-23 15:15:48,360 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-23 15:15:48,360 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-23 15:15:48,360 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-23 15:15:48,361 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-23 15:15:48,361 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:15:33" (3/4) ... [2022-11-23 15:15:48,363 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-23 15:15:48,410 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a9e733-a290-4583-9a38-7def27209a71/bin/utaipan-Q6hlc19bkW/witness.graphml [2022-11-23 15:15:48,410 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-23 15:15:48,411 INFO L158 Benchmark]: Toolchain (without parser) took 15718.03ms. Allocated memory was 172.0MB in the beginning and 285.2MB in the end (delta: 113.2MB). Free memory was 127.5MB in the beginning and 163.7MB in the end (delta: -36.2MB). Peak memory consumption was 79.4MB. Max. memory is 16.1GB. [2022-11-23 15:15:48,411 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 172.0MB. Free memory is still 142.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 15:15:48,412 INFO L158 Benchmark]: CACSL2BoogieTranslator took 226.86ms. Allocated memory is still 172.0MB. Free memory was 126.9MB in the beginning and 117.1MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-23 15:15:48,412 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.19ms. Allocated memory is still 172.0MB. Free memory was 117.1MB in the beginning and 115.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 15:15:48,412 INFO L158 Benchmark]: Boogie Preprocessor took 50.59ms. Allocated memory is still 172.0MB. Free memory was 115.6MB in the beginning and 114.4MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 15:15:48,412 INFO L158 Benchmark]: RCFGBuilder took 507.52ms. Allocated memory is still 172.0MB. Free memory was 114.4MB in the beginning and 100.3MB in the end (delta: 14.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-23 15:15:48,413 INFO L158 Benchmark]: TraceAbstraction took 14836.97ms. Allocated memory was 172.0MB in the beginning and 285.2MB in the end (delta: 113.2MB). Free memory was 99.7MB in the beginning and 167.9MB in the end (delta: -68.2MB). Peak memory consumption was 47.9MB. Max. memory is 16.1GB. [2022-11-23 15:15:48,413 INFO L158 Benchmark]: Witness Printer took 50.15ms. Allocated memory is still 285.2MB. Free memory was 167.9MB in the beginning and 163.7MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-23 15:15:48,415 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 172.0MB. Free memory is still 142.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 226.86ms. Allocated memory is still 172.0MB. Free memory was 126.9MB in the beginning and 117.1MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.19ms. Allocated memory is still 172.0MB. Free memory was 117.1MB in the beginning and 115.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 50.59ms. Allocated memory is still 172.0MB. Free memory was 115.6MB in the beginning and 114.4MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 507.52ms. Allocated memory is still 172.0MB. Free memory was 114.4MB in the beginning and 100.3MB in the end (delta: 14.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 14836.97ms. Allocated memory was 172.0MB in the beginning and 285.2MB in the end (delta: 113.2MB). Free memory was 99.7MB in the beginning and 167.9MB in the end (delta: -68.2MB). Peak memory consumption was 47.9MB. Max. memory is 16.1GB. * Witness Printer took 50.15ms. Allocated memory is still 285.2MB. Free memory was 167.9MB in the beginning and 163.7MB in the end (delta: 4.2MB). 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: 14.7s, OverallIterations: 15, TraceHistogramMax: 10, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 231 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 231 mSDsluCounter, 207 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 129 mSDsCounter, 57 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 477 IncrementalHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 57 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, 5.2s 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: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 21 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 5.9s 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! [2022-11-23 15:15:48,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a9e733-a290-4583-9a38-7def27209a71/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, 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)