./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/getNumbers1-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5703c6eb-6065-4087-ba6f-c2e0b26f441b/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5703c6eb-6065-4087-ba6f-c2e0b26f441b/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5703c6eb-6065-4087-ba6f-c2e0b26f441b/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5703c6eb-6065-4087-ba6f-c2e0b26f441b/bin/uautomizer-vX5HgA9Q3a/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/getNumbers1-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5703c6eb-6065-4087-ba6f-c2e0b26f441b/bin/uautomizer-vX5HgA9Q3a/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5703c6eb-6065-4087-ba6f-c2e0b26f441b/bin/uautomizer-vX5HgA9Q3a --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ae33a6a64877fc5c824e4d2dbc13817f946c171e566de8189cdbc86c749355b6 --- 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-b5237d8 [2022-11-21 13:56:56,858 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 13:56:56,860 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 13:56:56,889 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 13:56:56,889 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 13:56:56,893 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 13:56:56,896 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 13:56:56,899 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 13:56:56,901 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 13:56:56,907 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 13:56:56,909 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 13:56:56,911 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 13:56:56,911 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 13:56:56,916 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 13:56:56,919 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 13:56:56,921 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 13:56:56,922 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 13:56:56,923 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 13:56:56,925 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 13:56:56,931 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 13:56:56,933 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 13:56:56,935 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 13:56:56,936 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 13:56:56,937 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 13:56:56,944 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 13:56:56,945 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 13:56:56,945 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 13:56:56,947 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 13:56:56,948 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 13:56:56,948 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 13:56:56,949 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 13:56:56,950 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 13:56:56,952 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 13:56:56,954 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 13:56:56,955 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 13:56:56,955 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 13:56:56,956 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 13:56:56,956 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 13:56:56,957 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 13:56:56,957 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 13:56:56,958 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 13:56:56,959 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5703c6eb-6065-4087-ba6f-c2e0b26f441b/bin/uautomizer-vX5HgA9Q3a/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-21 13:56:56,994 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 13:56:56,994 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 13:56:56,995 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 13:56:56,995 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 13:56:56,996 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 13:56:56,996 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 13:56:56,997 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 13:56:56,997 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 13:56:56,998 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 13:56:56,998 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 13:56:56,999 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 13:56:56,999 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-21 13:56:56,999 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 13:56:57,000 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 13:56:57,000 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 13:56:57,001 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-21 13:56:57,001 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-21 13:56:57,001 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-21 13:56:57,001 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 13:56:57,001 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-21 13:56:57,002 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 13:56:57,002 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 13:56:57,002 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 13:56:57,002 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 13:56:57,003 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 13:56:57,003 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 13:56:57,003 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 13:56:57,003 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 13:56:57,003 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 13:56:57,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 13:56:57,004 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_5703c6eb-6065-4087-ba6f-c2e0b26f441b/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5703c6eb-6065-4087-ba6f-c2e0b26f441b/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ae33a6a64877fc5c824e4d2dbc13817f946c171e566de8189cdbc86c749355b6 [2022-11-21 13:56:57,268 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 13:56:57,290 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 13:56:57,292 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 13:56:57,294 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 13:56:57,294 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 13:56:57,296 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5703c6eb-6065-4087-ba6f-c2e0b26f441b/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/memsafety-ext3/getNumbers1-1.c [2022-11-21 13:57:00,487 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 13:57:00,663 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 13:57:00,664 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5703c6eb-6065-4087-ba6f-c2e0b26f441b/sv-benchmarks/c/memsafety-ext3/getNumbers1-1.c [2022-11-21 13:57:00,668 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5703c6eb-6065-4087-ba6f-c2e0b26f441b/bin/uautomizer-vX5HgA9Q3a/data/d84c43780/f06e557beacd45c8a1b90ca9e4c39a84/FLAG858dae0e6 [2022-11-21 13:57:00,682 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5703c6eb-6065-4087-ba6f-c2e0b26f441b/bin/uautomizer-vX5HgA9Q3a/data/d84c43780/f06e557beacd45c8a1b90ca9e4c39a84 [2022-11-21 13:57:00,685 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 13:57:00,686 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 13:57:00,688 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 13:57:00,688 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 13:57:00,692 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 13:57:00,693 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:57:00" (1/1) ... [2022-11-21 13:57:00,694 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b3b0eb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:57:00, skipping insertion in model container [2022-11-21 13:57:00,694 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:57:00" (1/1) ... [2022-11-21 13:57:00,702 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 13:57:00,714 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 13:57:00,880 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 13:57:00,892 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 13:57:00,907 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 13:57:00,922 INFO L208 MainTranslator]: Completed translation [2022-11-21 13:57:00,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:57:00 WrapperNode [2022-11-21 13:57:00,923 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 13:57:00,924 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 13:57:00,925 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 13:57:00,925 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 13:57:00,934 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:57:00" (1/1) ... [2022-11-21 13:57:00,942 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:57:00" (1/1) ... [2022-11-21 13:57:00,961 INFO L138 Inliner]: procedures = 10, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 38 [2022-11-21 13:57:00,962 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 13:57:00,962 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 13:57:00,962 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 13:57:00,962 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 13:57:00,969 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:57:00" (1/1) ... [2022-11-21 13:57:00,969 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:57:00" (1/1) ... [2022-11-21 13:57:00,970 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:57:00" (1/1) ... [2022-11-21 13:57:00,971 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:57:00" (1/1) ... [2022-11-21 13:57:00,975 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:57:00" (1/1) ... [2022-11-21 13:57:00,979 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:57:00" (1/1) ... [2022-11-21 13:57:00,980 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:57:00" (1/1) ... [2022-11-21 13:57:00,980 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:57:00" (1/1) ... [2022-11-21 13:57:00,982 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 13:57:00,983 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 13:57:00,983 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 13:57:00,983 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 13:57:00,984 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:57:00" (1/1) ... [2022-11-21 13:57:01,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 13:57:01,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5703c6eb-6065-4087-ba6f-c2e0b26f441b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:57:01,028 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5703c6eb-6065-4087-ba6f-c2e0b26f441b/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 13:57:01,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5703c6eb-6065-4087-ba6f-c2e0b26f441b/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 13:57:01,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 13:57:01,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 13:57:01,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 13:57:01,084 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-21 13:57:01,084 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 13:57:01,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 13:57:01,167 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 13:57:01,170 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 13:57:01,359 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 13:57:01,365 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 13:57:01,365 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-21 13:57:01,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:57:01 BoogieIcfgContainer [2022-11-21 13:57:01,368 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 13:57:01,370 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 13:57:01,371 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 13:57:01,374 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 13:57:01,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:57:00" (1/3) ... [2022-11-21 13:57:01,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6250c945 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:57:01, skipping insertion in model container [2022-11-21 13:57:01,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:57:00" (2/3) ... [2022-11-21 13:57:01,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6250c945 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:57:01, skipping insertion in model container [2022-11-21 13:57:01,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:57:01" (3/3) ... [2022-11-21 13:57:01,377 INFO L112 eAbstractionObserver]: Analyzing ICFG getNumbers1-1.c [2022-11-21 13:57:01,397 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 13:57:01,397 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2022-11-21 13:57:01,465 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 13:57:01,475 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;@7ff86d35, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 13:57:01,475 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-21 13:57:01,480 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 19 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) [2022-11-21 13:57:01,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-21 13:57:01,489 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:57:01,489 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-21 13:57:01,490 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-21 13:57:01,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:01,497 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2022-11-21 13:57:01,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:01,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412561027] [2022-11-21 13:57:01,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:01,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:01,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:01,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:57:01,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:01,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412561027] [2022-11-21 13:57:01,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412561027] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:57:01,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:57:01,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 13:57:01,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994450900] [2022-11-21 13:57:01,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:57:01,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 13:57:01,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:01,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 13:57:01,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:57:01,864 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 19 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) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-11-21 13:57:01,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:57:01,924 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2022-11-21 13:57:01,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 13:57:01,940 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2022-11-21 13:57:01,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:57:01,947 INFO L225 Difference]: With dead ends: 19 [2022-11-21 13:57:01,947 INFO L226 Difference]: Without dead ends: 17 [2022-11-21 13:57:01,949 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 [2022-11-21 13:57:01,952 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 4 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 13:57:01,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 25 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 13:57:01,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-21 13:57:02,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-21 13:57:02,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 16 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) [2022-11-21 13:57:02,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2022-11-21 13:57:02,017 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 4 [2022-11-21 13:57:02,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:57:02,017 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2022-11-21 13:57:02,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-11-21 13:57:02,018 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-11-21 13:57:02,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-21 13:57:02,022 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:57:02,022 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-21 13:57:02,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 13:57:02,023 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-21 13:57:02,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:02,024 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2022-11-21 13:57:02,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:02,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056973672] [2022-11-21 13:57:02,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:02,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:02,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:02,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:57:02,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:02,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056973672] [2022-11-21 13:57:02,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056973672] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:57:02,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:57:02,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 13:57:02,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30504927] [2022-11-21 13:57:02,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:57:02,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 13:57:02,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:02,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 13:57:02,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:57:02,128 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-11-21 13:57:02,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:57:02,150 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2022-11-21 13:57:02,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 13:57:02,151 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2022-11-21 13:57:02,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:57:02,152 INFO L225 Difference]: With dead ends: 20 [2022-11-21 13:57:02,152 INFO L226 Difference]: Without dead ends: 20 [2022-11-21 13:57:02,152 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 [2022-11-21 13:57:02,154 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 13:57:02,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 24 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 13:57:02,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-21 13:57:02,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2022-11-21 13:57:02,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 18 states have internal predecessors, (20), 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) [2022-11-21 13:57:02,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2022-11-21 13:57:02,159 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 4 [2022-11-21 13:57:02,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:57:02,159 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2022-11-21 13:57:02,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-11-21 13:57:02,159 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2022-11-21 13:57:02,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-21 13:57:02,160 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:57:02,160 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2022-11-21 13:57:02,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 13:57:02,161 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-21 13:57:02,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:02,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1809646286, now seen corresponding path program 1 times [2022-11-21 13:57:02,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:02,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105015963] [2022-11-21 13:57:02,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:02,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:02,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:02,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:57:02,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:02,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105015963] [2022-11-21 13:57:02,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105015963] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:57:02,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495872576] [2022-11-21 13:57:02,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:02,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:57:02,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5703c6eb-6065-4087-ba6f-c2e0b26f441b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:57:02,362 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5703c6eb-6065-4087-ba6f-c2e0b26f441b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:57:02,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5703c6eb-6065-4087-ba6f-c2e0b26f441b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 13:57:02,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:02,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-21 13:57:02,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:57:02,566 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 [2022-11-21 13:57:02,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:57:02,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:57:02,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:57:02,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495872576] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:57:02,751 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:57:02,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2022-11-21 13:57:02,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053468166] [2022-11-21 13:57:02,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:57:02,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-21 13:57:02,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:02,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-21 13:57:02,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-21 13:57:02,754 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 9 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) [2022-11-21 13:57:02,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:57:02,917 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2022-11-21 13:57:02,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 13:57:02,920 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 9 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) Word has length 7 [2022-11-21 13:57:02,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:57:02,921 INFO L225 Difference]: With dead ends: 26 [2022-11-21 13:57:02,921 INFO L226 Difference]: Without dead ends: 26 [2022-11-21 13:57:02,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-11-21 13:57:02,923 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 27 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 13:57:02,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 38 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 13:57:02,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-21 13:57:02,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-11-21 13:57:02,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 23 states have (on average 1.173913043478261) internal successors, (27), 25 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) [2022-11-21 13:57:02,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2022-11-21 13:57:02,934 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 7 [2022-11-21 13:57:02,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:57:02,935 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2022-11-21 13:57:02,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 9 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) [2022-11-21 13:57:02,936 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2022-11-21 13:57:02,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-21 13:57:02,937 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:57:02,937 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:57:02,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5703c6eb-6065-4087-ba6f-c2e0b26f441b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 13:57:03,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5703c6eb-6065-4087-ba6f-c2e0b26f441b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:57:03,152 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-21 13:57:03,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:03,152 INFO L85 PathProgramCache]: Analyzing trace with hash -2129139286, now seen corresponding path program 1 times [2022-11-21 13:57:03,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:03,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464774906] [2022-11-21 13:57:03,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:03,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:03,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:03,439 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-21 13:57:03,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:03,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464774906] [2022-11-21 13:57:03,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464774906] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:57:03,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:57:03,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 13:57:03,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853930895] [2022-11-21 13:57:03,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:57:03,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 13:57:03,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:03,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 13:57:03,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 13:57:03,442 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 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) [2022-11-21 13:57:03,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:57:03,488 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2022-11-21 13:57:03,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 13:57:03,488 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 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 19 [2022-11-21 13:57:03,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:57:03,489 INFO L225 Difference]: With dead ends: 31 [2022-11-21 13:57:03,489 INFO L226 Difference]: Without dead ends: 31 [2022-11-21 13:57:03,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-21 13:57:03,491 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 18 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 13:57:03,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 25 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 13:57:03,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-21 13:57:03,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2022-11-21 13:57:03,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 25 states have (on average 1.2) internal successors, (30), 27 states have internal predecessors, (30), 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) [2022-11-21 13:57:03,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-11-21 13:57:03,496 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 19 [2022-11-21 13:57:03,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:57:03,496 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-11-21 13:57:03,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 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) [2022-11-21 13:57:03,497 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-11-21 13:57:03,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-21 13:57:03,497 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:57:03,497 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:57:03,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-21 13:57:03,498 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-21 13:57:03,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:03,499 INFO L85 PathProgramCache]: Analyzing trace with hash -2129139287, now seen corresponding path program 1 times [2022-11-21 13:57:03,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:03,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210724309] [2022-11-21 13:57:03,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:03,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:03,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:03,653 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:57:03,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:03,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210724309] [2022-11-21 13:57:03,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210724309] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:57:03,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063927296] [2022-11-21 13:57:03,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:03,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:57:03,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5703c6eb-6065-4087-ba6f-c2e0b26f441b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:57:03,659 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5703c6eb-6065-4087-ba6f-c2e0b26f441b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:57:03,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5703c6eb-6065-4087-ba6f-c2e0b26f441b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 13:57:03,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:03,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-21 13:57:03,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:57:03,786 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:57:03,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:57:03,862 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:57:03,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063927296] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:57:03,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:57:03,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-11-21 13:57:03,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492820300] [2022-11-21 13:57:03,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:57:03,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-21 13:57:03,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:03,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-21 13:57:03,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-21 13:57:03,865 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 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) [2022-11-21 13:57:03,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:57:03,944 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2022-11-21 13:57:03,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-21 13:57:03,948 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 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 19 [2022-11-21 13:57:03,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:57:03,949 INFO L225 Difference]: With dead ends: 46 [2022-11-21 13:57:03,949 INFO L226 Difference]: Without dead ends: 46 [2022-11-21 13:57:03,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-21 13:57:03,952 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 20 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 13:57:03,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 74 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 13:57:03,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-21 13:57:03,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-11-21 13:57:03,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 45 states have internal predecessors, (48), 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) [2022-11-21 13:57:03,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2022-11-21 13:57:03,960 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 19 [2022-11-21 13:57:03,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:57:03,961 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2022-11-21 13:57:03,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 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) [2022-11-21 13:57:03,961 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2022-11-21 13:57:03,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-21 13:57:03,962 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:57:03,962 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:57:03,973 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5703c6eb-6065-4087-ba6f-c2e0b26f441b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-21 13:57:04,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5703c6eb-6065-4087-ba6f-c2e0b26f441b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:57:04,170 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2022-11-21 13:57:04,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:04,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1224069289, now seen corresponding path program 2 times [2022-11-21 13:57:04,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:04,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112322072] [2022-11-21 13:57:04,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:04,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:04,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 13:57:04,204 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-21 13:57:04,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 13:57:04,239 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-21 13:57:04,240 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-21 13:57:04,241 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 5 remaining) [2022-11-21 13:57:04,243 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 5 remaining) [2022-11-21 13:57:04,243 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 5 remaining) [2022-11-21 13:57:04,243 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 5 remaining) [2022-11-21 13:57:04,244 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (0 of 5 remaining) [2022-11-21 13:57:04,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-21 13:57:04,247 INFO L444 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1] [2022-11-21 13:57:04,252 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-21 13:57:04,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 01:57:04 BoogieIcfgContainer [2022-11-21 13:57:04,283 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-21 13:57:04,284 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-21 13:57:04,284 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-21 13:57:04,284 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-21 13:57:04,284 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:57:01" (3/4) ... [2022-11-21 13:57:04,286 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-21 13:57:04,329 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5703c6eb-6065-4087-ba6f-c2e0b26f441b/bin/uautomizer-vX5HgA9Q3a/witness.graphml [2022-11-21 13:57:04,330 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-21 13:57:04,330 INFO L158 Benchmark]: Toolchain (without parser) took 3644.23ms. Allocated memory was 148.9MB in the beginning and 182.5MB in the end (delta: 33.6MB). Free memory was 105.1MB in the beginning and 78.1MB in the end (delta: 27.0MB). Peak memory consumption was 64.4MB. Max. memory is 16.1GB. [2022-11-21 13:57:04,331 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 115.3MB. Free memory is still 64.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-21 13:57:04,331 INFO L158 Benchmark]: CACSL2BoogieTranslator took 235.81ms. Allocated memory is still 148.9MB. Free memory was 104.9MB in the beginning and 95.3MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-21 13:57:04,331 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.48ms. Allocated memory is still 148.9MB. Free memory was 95.3MB in the beginning and 93.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-21 13:57:04,332 INFO L158 Benchmark]: Boogie Preprocessor took 20.02ms. Allocated memory is still 148.9MB. Free memory was 93.7MB in the beginning and 92.7MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-21 13:57:04,332 INFO L158 Benchmark]: RCFGBuilder took 384.68ms. Allocated memory is still 148.9MB. Free memory was 92.5MB in the beginning and 82.1MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-21 13:57:04,332 INFO L158 Benchmark]: TraceAbstraction took 2912.66ms. Allocated memory was 148.9MB in the beginning and 182.5MB in the end (delta: 33.6MB). Free memory was 81.4MB in the beginning and 81.2MB in the end (delta: 165.4kB). Peak memory consumption was 35.0MB. Max. memory is 16.1GB. [2022-11-21 13:57:04,333 INFO L158 Benchmark]: Witness Printer took 46.18ms. Allocated memory is still 182.5MB. Free memory was 81.2MB in the beginning and 78.1MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-21 13:57:04,335 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 115.3MB. Free memory is still 64.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 235.81ms. Allocated memory is still 148.9MB. Free memory was 104.9MB in the beginning and 95.3MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.48ms. Allocated memory is still 148.9MB. Free memory was 95.3MB in the beginning and 93.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 20.02ms. Allocated memory is still 148.9MB. Free memory was 93.7MB in the beginning and 92.7MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 384.68ms. Allocated memory is still 148.9MB. Free memory was 92.5MB in the beginning and 82.1MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 2912.66ms. Allocated memory was 148.9MB in the beginning and 182.5MB in the end (delta: 33.6MB). Free memory was 81.4MB in the beginning and 81.2MB in the end (delta: 165.4kB). Peak memory consumption was 35.0MB. Max. memory is 16.1GB. * Witness Printer took 46.18ms. Allocated memory is still 182.5MB. Free memory was 81.2MB in the beginning and 78.1MB in the end (delta: 3.1MB). 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: [L19] CALL, EXPR getNumbers() [L8] int *array = alloca(10 * sizeof(int)); [L10] int i = 0; VAL [alloca(10 * sizeof(int))={10:0}, array={10:0}, i=0] [L10] COND TRUE i < 10 VAL [alloca(10 * sizeof(int))={10:0}, array={10:0}, i=0] [L11] array[i] = i VAL [alloca(10 * sizeof(int))={10:0}, array={10:0}, i=0] [L10] ++i VAL [alloca(10 * sizeof(int))={10:0}, array={10:0}, i=1] [L10] COND TRUE i < 10 VAL [alloca(10 * sizeof(int))={10:0}, array={10:0}, i=1] [L11] array[i] = i VAL [alloca(10 * sizeof(int))={10:0}, array={10:0}, i=1] [L10] ++i VAL [alloca(10 * sizeof(int))={10:0}, array={10:0}, i=2] [L10] COND TRUE i < 10 VAL [alloca(10 * sizeof(int))={10:0}, array={10:0}, i=2] [L11] array[i] = i VAL [alloca(10 * sizeof(int))={10:0}, array={10:0}, i=2] [L10] ++i VAL [alloca(10 * sizeof(int))={10:0}, array={10:0}, i=3] [L10] COND TRUE i < 10 VAL [alloca(10 * sizeof(int))={10:0}, array={10:0}, i=3] [L11] array[i] = i VAL [alloca(10 * sizeof(int))={10:0}, array={10:0}, i=3] [L10] ++i VAL [alloca(10 * sizeof(int))={10:0}, array={10:0}, i=4] [L10] COND TRUE i < 10 VAL [alloca(10 * sizeof(int))={10:0}, array={10:0}, i=4] [L11] array[i] = i VAL [alloca(10 * sizeof(int))={10:0}, array={10:0}, i=4] [L10] ++i VAL [alloca(10 * sizeof(int))={10:0}, array={10:0}, i=5] [L10] COND TRUE i < 10 VAL [alloca(10 * sizeof(int))={10:0}, array={10:0}, i=5] [L11] array[i] = i VAL [alloca(10 * sizeof(int))={10:0}, array={10:0}, i=5] [L10] ++i VAL [alloca(10 * sizeof(int))={10:0}, array={10:0}, i=6] [L10] COND TRUE i < 10 VAL [alloca(10 * sizeof(int))={10:0}, array={10:0}, i=6] [L11] array[i] = i VAL [alloca(10 * sizeof(int))={10:0}, array={10:0}, i=6] [L10] ++i VAL [alloca(10 * sizeof(int))={10:0}, array={10:0}, i=7] [L10] COND TRUE i < 10 VAL [alloca(10 * sizeof(int))={10:0}, array={10:0}, i=7] [L11] array[i] = i VAL [alloca(10 * sizeof(int))={10:0}, array={10:0}, i=7] [L10] ++i VAL [alloca(10 * sizeof(int))={10:0}, array={10:0}, i=8] [L10] COND TRUE i < 10 VAL [alloca(10 * sizeof(int))={10:0}, array={10:0}, i=8] [L11] array[i] = i VAL [alloca(10 * sizeof(int))={10:0}, array={10:0}, i=8] [L10] ++i VAL [alloca(10 * sizeof(int))={10:0}, array={10:0}, i=9] [L10] COND TRUE i < 10 VAL [alloca(10 * sizeof(int))={10:0}, array={10:0}, i=9] [L11] array[i] = i VAL [alloca(10 * sizeof(int))={10:0}, array={10:0}, i=9] [L10] ++i VAL [alloca(10 * sizeof(int))={10:0}, array={10:0}, i=10] [L10] COND FALSE !(i < 10) VAL [alloca(10 * sizeof(int))={10:0}, array={10:0}, i=10] [L14] return array; [L19] RET, EXPR getNumbers() [L19] int *numbers = getNumbers(); [L21] int i = 0; VAL [i=0, numbers={10:0}] [L21] COND TRUE i < 10 [L22] numbers + i - 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: 17]: 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, 20 locations, 5 error locations. Started 1 CEGAR loops. OverallTime: 2.8s, OverallIterations: 6, TraceHistogramMax: 10, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 70 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 70 mSDsluCounter, 186 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 121 mSDsCounter, 23 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 121 IncrementalHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 23 mSolverCounterUnsat, 65 mSDtfsCounter, 121 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 70 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=46occurred in iteration=5, InterpolantAutomatonStates: 30, 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, 5 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 116 NumberOfCodeBlocks, 116 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 96 ConstructedInterpolants, 0 QuantifiedInterpolants, 589 SizeOfPredicates, 2 NumberOfNonLiveVariables, 129 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 22/94 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! [2022-11-21 13:57:04,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5703c6eb-6065-4087-ba6f-c2e0b26f441b/bin/uautomizer-vX5HgA9Q3a/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)