./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2_-read.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65d92a0-be85-4619-b24a-b78152448ec8/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65d92a0-be85-4619-b24a-b78152448ec8/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65d92a0-be85-4619-b24a-b78152448ec8/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65d92a0-be85-4619-b24a-b78152448ec8/bin/utaipan-UbGMyvGFUs/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2_-read.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65d92a0-be85-4619-b24a-b78152448ec8/bin/utaipan-UbGMyvGFUs/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65d92a0-be85-4619-b24a-b78152448ec8/bin/utaipan-UbGMyvGFUs --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 07a396ef153f1ca8e856eefcfa25d3d77eb73f779a009e48698bf5ce12969740 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:30:21,238 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:30:21,240 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:30:21,297 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:30:21,298 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:30:21,299 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:30:21,301 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:30:21,304 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:30:21,307 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:30:21,309 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:30:21,310 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:30:21,312 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:30:21,313 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:30:21,315 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:30:21,317 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:30:21,319 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:30:21,320 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:30:21,321 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:30:21,324 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:30:21,327 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:30:21,330 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:30:21,332 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:30:21,334 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:30:21,335 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:30:21,340 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:30:21,340 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:30:21,341 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:30:21,342 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:30:21,343 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:30:21,344 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:30:21,345 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:30:21,346 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:30:21,347 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:30:21,348 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:30:21,350 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:30:21,350 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:30:21,351 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:30:21,352 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:30:21,352 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:30:21,353 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:30:21,354 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:30:21,355 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65d92a0-be85-4619-b24a-b78152448ec8/bin/utaipan-UbGMyvGFUs/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-19 14:30:21,385 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:30:21,385 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:30:21,386 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:30:21,386 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:30:21,387 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:30:21,387 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:30:21,387 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:30:21,387 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:30:21,388 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:30:21,388 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:30:21,388 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:30:21,388 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:30:21,388 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:30:21,389 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:30:21,389 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:30:21,389 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:30:21,390 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 14:30:21,390 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 14:30:21,391 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:30:21,391 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:30:21,391 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-19 14:30:21,391 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:30:21,392 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:30:21,392 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:30:21,392 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-19 14:30:21,392 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-19 14:30:21,392 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-19 14:30:21,393 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:30:21,393 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:30:21,393 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:30:21,393 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:30:21,394 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:30:21,394 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:30:21,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:30:21,394 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:30:21,395 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:30:21,395 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:30:21,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:30:21,395 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:30:21,396 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:30:21,396 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_f65d92a0-be85-4619-b24a-b78152448ec8/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65d92a0-be85-4619-b24a-b78152448ec8/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 07a396ef153f1ca8e856eefcfa25d3d77eb73f779a009e48698bf5ce12969740 [2021-11-19 14:30:21,742 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:30:21,773 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:30:21,777 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:30:21,779 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:30:21,780 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:30:21,782 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65d92a0-be85-4619-b24a-b78152448ec8/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2_-read.c [2021-11-19 14:30:21,863 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65d92a0-be85-4619-b24a-b78152448ec8/bin/utaipan-UbGMyvGFUs/data/1f3d0ad7b/8bfe8b4a06504d469fdefdcc5afbe6e9/FLAG454554197 [2021-11-19 14:30:22,415 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:30:22,416 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65d92a0-be85-4619-b24a-b78152448ec8/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2_-read.c [2021-11-19 14:30:22,429 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65d92a0-be85-4619-b24a-b78152448ec8/bin/utaipan-UbGMyvGFUs/data/1f3d0ad7b/8bfe8b4a06504d469fdefdcc5afbe6e9/FLAG454554197 [2021-11-19 14:30:22,787 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65d92a0-be85-4619-b24a-b78152448ec8/bin/utaipan-UbGMyvGFUs/data/1f3d0ad7b/8bfe8b4a06504d469fdefdcc5afbe6e9 [2021-11-19 14:30:22,791 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:30:22,794 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:30:22,796 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:30:22,796 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:30:22,800 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:30:22,801 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:30:22" (1/1) ... [2021-11-19 14:30:22,802 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b7aff7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:30:22, skipping insertion in model container [2021-11-19 14:30:22,803 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:30:22" (1/1) ... [2021-11-19 14:30:22,811 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:30:22,826 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:30:22,973 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:30:22,983 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:30:23,017 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:30:23,033 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:30:23,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:30:23 WrapperNode [2021-11-19 14:30:23,033 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:30:23,035 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:30:23,035 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:30:23,035 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:30:23,044 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:30:23" (1/1) ... [2021-11-19 14:30:23,052 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:30:23" (1/1) ... [2021-11-19 14:30:23,076 INFO L137 Inliner]: procedures = 9, calls = 17, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 87 [2021-11-19 14:30:23,077 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:30:23,078 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:30:23,078 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:30:23,078 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:30:23,088 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:30:23" (1/1) ... [2021-11-19 14:30:23,088 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:30:23" (1/1) ... [2021-11-19 14:30:23,091 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:30:23" (1/1) ... [2021-11-19 14:30:23,091 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:30:23" (1/1) ... [2021-11-19 14:30:23,098 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:30:23" (1/1) ... [2021-11-19 14:30:23,102 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:30:23" (1/1) ... [2021-11-19 14:30:23,104 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:30:23" (1/1) ... [2021-11-19 14:30:23,107 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:30:23,108 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:30:23,108 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:30:23,108 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:30:23,109 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:30:23" (1/1) ... [2021-11-19 14:30:23,118 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:30:23,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65d92a0-be85-4619-b24a-b78152448ec8/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:30:23,149 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65d92a0-be85-4619-b24a-b78152448ec8/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:30:23,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65d92a0-be85-4619-b24a-b78152448ec8/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:30:23,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-19 14:30:23,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:30:23,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:30:23,198 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-19 14:30:23,198 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 14:30:23,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 14:30:23,280 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:30:23,282 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:30:23,494 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:30:23,557 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:30:23,557 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-19 14:30:23,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:30:23 BoogieIcfgContainer [2021-11-19 14:30:23,560 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:30:23,563 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:30:23,563 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:30:23,568 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:30:23,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:30:22" (1/3) ... [2021-11-19 14:30:23,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63436e73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:30:23, skipping insertion in model container [2021-11-19 14:30:23,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:30:23" (2/3) ... [2021-11-19 14:30:23,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63436e73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:30:23, skipping insertion in model container [2021-11-19 14:30:23,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:30:23" (3/3) ... [2021-11-19 14:30:23,572 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength2_-read.c [2021-11-19 14:30:23,578 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:30:23,578 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2021-11-19 14:30:23,665 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:30:23,681 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 14:30:23,682 INFO L340 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2021-11-19 14:30:23,732 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:30:23,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-19 14:30:23,740 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:23,740 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-19 14:30:23,741 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-19 14:30:23,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:23,755 INFO L85 PathProgramCache]: Analyzing trace with hash 4075446, now seen corresponding path program 1 times [2021-11-19 14:30:23,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:30:23,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496520937] [2021-11-19 14:30:23,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:23,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:30:23,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:23,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:30:23,931 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:30:23,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496520937] [2021-11-19 14:30:23,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496520937] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:30:23,933 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:30:23,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 14:30:23,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729171217] [2021-11-19 14:30:23,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:30:23,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:30:23,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:30:23,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:30:23,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:30:23,972 INFO L87 Difference]: Start difference. First operand has 24 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 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) [2021-11-19 14:30:24,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:30:24,053 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-11-19 14:30:24,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:30:24,056 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 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 [2021-11-19 14:30:24,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:30:24,066 INFO L225 Difference]: With dead ends: 39 [2021-11-19 14:30:24,067 INFO L226 Difference]: Without dead ends: 38 [2021-11-19 14:30:24,069 INFO L932 BasicCegarLoop]: 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 [2021-11-19 14:30:24,075 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 24 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:30:24,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 22 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:30:24,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-19 14:30:24,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 24. [2021-11-19 14:30:24,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 13 states have (on average 2.076923076923077) internal successors, (27), 23 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) [2021-11-19 14:30:24,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-11-19 14:30:24,116 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 4 [2021-11-19 14:30:24,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:30:24,116 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-11-19 14:30:24,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 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) [2021-11-19 14:30:24,117 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-11-19 14:30:24,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-19 14:30:24,118 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:24,118 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-19 14:30:24,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 14:30:24,119 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-19 14:30:24,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:24,120 INFO L85 PathProgramCache]: Analyzing trace with hash 3972391, now seen corresponding path program 1 times [2021-11-19 14:30:24,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:30:24,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009574587] [2021-11-19 14:30:24,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:24,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:30:24,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:24,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:30:24,187 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:30:24,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009574587] [2021-11-19 14:30:24,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009574587] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:30:24,187 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:30:24,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:30:24,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533386269] [2021-11-19 14:30:24,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:30:24,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:30:24,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:30:24,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:30:24,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:30:24,191 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 4 states, 4 states have (on average 1.0) 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) [2021-11-19 14:30:24,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:30:24,270 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2021-11-19 14:30:24,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:30:24,270 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.0) 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 [2021-11-19 14:30:24,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:30:24,272 INFO L225 Difference]: With dead ends: 40 [2021-11-19 14:30:24,272 INFO L226 Difference]: Without dead ends: 40 [2021-11-19 14:30:24,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:30:24,274 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 39 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:30:24,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 32 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:30:24,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-19 14:30:24,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 25. [2021-11-19 14:30:24,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 14 states have (on average 2.0) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:30:24,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-11-19 14:30:24,281 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 4 [2021-11-19 14:30:24,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:30:24,281 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-11-19 14:30:24,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.0) 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) [2021-11-19 14:30:24,281 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-11-19 14:30:24,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-19 14:30:24,282 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:24,282 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-19 14:30:24,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 14:30:24,283 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-19 14:30:24,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:24,284 INFO L85 PathProgramCache]: Analyzing trace with hash 123235085, now seen corresponding path program 1 times [2021-11-19 14:30:24,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:30:24,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431682444] [2021-11-19 14:30:24,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:24,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:30:24,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:30:24,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:30:24,348 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:30:24,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431682444] [2021-11-19 14:30:24,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431682444] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:30:24,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:30:24,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:30:24,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278374930] [2021-11-19 14:30:24,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:30:24,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:30:24,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:30:24,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:30:24,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:30:24,355 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:30:24,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:30:24,450 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2021-11-19 14:30:24,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:30:24,450 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-19 14:30:24,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:30:24,451 INFO L225 Difference]: With dead ends: 23 [2021-11-19 14:30:24,451 INFO L226 Difference]: Without dead ends: 23 [2021-11-19 14:30:24,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:30:24,455 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:30:24,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 22 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:30:24,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-19 14:30:24,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-11-19 14:30:24,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 22 states have internal predecessors, (26), 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) [2021-11-19 14:30:24,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-11-19 14:30:24,460 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 5 [2021-11-19 14:30:24,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:30:24,461 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-11-19 14:30:24,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:30:24,461 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-11-19 14:30:24,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-19 14:30:24,462 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:30:24,462 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-19 14:30:24,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-19 14:30:24,462 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 7 more)] === [2021-11-19 14:30:24,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:30:24,463 INFO L85 PathProgramCache]: Analyzing trace with hash 123235086, now seen corresponding path program 1 times [2021-11-19 14:30:24,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:30:24,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414676738] [2021-11-19 14:30:24,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:30:24,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:30:24,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 14:30:24,509 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-19 14:30:24,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 14:30:24,551 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-19 14:30:24,551 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-19 14:30:24,552 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr5REQUIRES_VIOLATION (10 of 11 remaining) [2021-11-19 14:30:24,555 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION (9 of 11 remaining) [2021-11-19 14:30:24,555 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION (8 of 11 remaining) [2021-11-19 14:30:24,555 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION (7 of 11 remaining) [2021-11-19 14:30:24,556 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION (6 of 11 remaining) [2021-11-19 14:30:24,556 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION (5 of 11 remaining) [2021-11-19 14:30:24,556 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION (4 of 11 remaining) [2021-11-19 14:30:24,556 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION (3 of 11 remaining) [2021-11-19 14:30:24,557 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION (2 of 11 remaining) [2021-11-19 14:30:24,557 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION (1 of 11 remaining) [2021-11-19 14:30:24,557 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 11 remaining) [2021-11-19 14:30:24,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-19 14:30:24,561 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2021-11-19 14:30:24,566 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-19 14:30:24,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 02:30:24 BoogieIcfgContainer [2021-11-19 14:30:24,602 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-19 14:30:24,605 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-19 14:30:24,606 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-19 14:30:24,606 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-19 14:30:24,607 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:30:23" (3/4) ... [2021-11-19 14:30:24,609 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-19 14:30:24,681 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65d92a0-be85-4619-b24a-b78152448ec8/bin/utaipan-UbGMyvGFUs/witness.graphml [2021-11-19 14:30:24,683 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-19 14:30:24,684 INFO L158 Benchmark]: Toolchain (without parser) took 1889.69ms. Allocated memory was 83.9MB in the beginning and 107.0MB in the end (delta: 23.1MB). Free memory was 45.1MB in the beginning and 45.8MB in the end (delta: -708.1kB). Peak memory consumption was 22.9MB. Max. memory is 16.1GB. [2021-11-19 14:30:24,684 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 83.9MB. Free memory is still 61.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:30:24,685 INFO L158 Benchmark]: CACSL2BoogieTranslator took 237.88ms. Allocated memory was 83.9MB in the beginning and 107.0MB in the end (delta: 23.1MB). Free memory was 44.9MB in the beginning and 85.1MB in the end (delta: -40.2MB). Peak memory consumption was 10.7MB. Max. memory is 16.1GB. [2021-11-19 14:30:24,685 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.23ms. Allocated memory is still 107.0MB. Free memory was 85.1MB in the beginning and 83.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-19 14:30:24,686 INFO L158 Benchmark]: Boogie Preprocessor took 29.20ms. Allocated memory is still 107.0MB. Free memory was 83.6MB in the beginning and 82.3MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-19 14:30:24,687 INFO L158 Benchmark]: RCFGBuilder took 452.87ms. Allocated memory is still 107.0MB. Free memory was 82.3MB in the beginning and 67.9MB in the end (delta: 14.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-19 14:30:24,687 INFO L158 Benchmark]: TraceAbstraction took 1040.30ms. Allocated memory is still 107.0MB. Free memory was 67.6MB in the beginning and 47.5MB in the end (delta: 20.1MB). Peak memory consumption was 16.4MB. Max. memory is 16.1GB. [2021-11-19 14:30:24,688 INFO L158 Benchmark]: Witness Printer took 77.39ms. Allocated memory is still 107.0MB. Free memory was 47.5MB in the beginning and 45.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-19 14:30:24,691 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 83.9MB. Free memory is still 61.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 237.88ms. Allocated memory was 83.9MB in the beginning and 107.0MB in the end (delta: 23.1MB). Free memory was 44.9MB in the beginning and 85.1MB in the end (delta: -40.2MB). Peak memory consumption was 10.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 42.23ms. Allocated memory is still 107.0MB. Free memory was 85.1MB in the beginning and 83.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 29.20ms. Allocated memory is still 107.0MB. Free memory was 83.6MB in the beginning and 82.3MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 452.87ms. Allocated memory is still 107.0MB. Free memory was 82.3MB in the beginning and 67.9MB in the end (delta: 14.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 1040.30ms. Allocated memory is still 107.0MB. Free memory was 67.6MB in the beginning and 47.5MB in the end (delta: 20.1MB). Peak memory consumption was 16.4MB. Max. memory is 16.1GB. * Witness Printer took 77.39ms. Allocated memory is still 107.0MB. Free memory was 47.5MB in the beginning and 45.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. 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: 14]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L32] int i, b[100]; [L33] i = 0 VAL [b={3:0}, i=0] [L33] COND TRUE i < 100 [L34] CALL foo(i, b, i) [L21] int a[n], i; [L22] i = 0 VAL [\old(n)=0, \old(size)=0, a={2:0}, b={3:0}, b={3:0}, i=0, n=0, size=0] [L22] COND FALSE !(i < size) [L25] CALL bar(a, size + 1) [L12] int res = 0, i; [L13] i = 0 VAL [\old(size)=1, b={2:0}, b={2:0}, i=0, res=0, size=1] [L13] COND TRUE i < size VAL [\old(size)=1, b={2:0}, b={2:0}, i=0, res=0, size=1] [L14] b[i] - UnprovableResult [Line: 23]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 23]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 23]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 23]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 34]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 34]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 37]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 37]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 31]: 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, 24 locations, 11 error locations. Started 1 CEGAR loops. OverallTime: 0.9s, OverallIterations: 4, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 75 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 75 mSDsluCounter, 76 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 53 mSDsCounter, 6 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 95 IncrementalHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6 mSolverCounterUnsat, 37 mSDtfsCounter, 95 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=2, InterpolantAutomatonStates: 12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 29 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 18 NumberOfCodeBlocks, 18 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 32 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 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! [2021-11-19 14:30:24,754 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65d92a0-be85-4619-b24a-b78152448ec8/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref)