./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/diff_usafe.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b54b823-0b09-4156-bcc5-dccf10f441f6/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b54b823-0b09-4156-bcc5-dccf10f441f6/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b54b823-0b09-4156-bcc5-dccf10f441f6/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b54b823-0b09-4156-bcc5-dccf10f441f6/bin/utaipan-TEXQjIfE4P/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/diff_usafe.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b54b823-0b09-4156-bcc5-dccf10f441f6/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b54b823-0b09-4156-bcc5-dccf10f441f6/bin/utaipan-TEXQjIfE4P --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 60b44baec8d5c42666f1f962a9b95cfd7e6c75178322ade094b7a047963f4b64 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:48:59,993 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:48:59,995 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:49:00,034 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:49:00,035 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:49:00,037 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:49:00,040 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:49:00,043 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:49:00,046 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:49:00,047 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:49:00,049 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:49:00,051 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:49:00,052 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:49:00,055 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:49:00,058 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:49:00,060 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:49:00,061 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:49:00,063 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:49:00,066 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:49:00,069 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:49:00,072 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:49:00,076 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:49:00,078 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:49:00,080 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:49:00,085 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:49:00,085 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:49:00,086 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:49:00,087 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:49:00,088 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:49:00,090 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:49:00,090 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:49:00,092 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:49:00,093 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:49:00,095 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:49:00,097 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:49:00,097 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:49:00,099 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:49:00,099 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:49:00,100 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:49:00,102 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:49:00,103 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:49:00,104 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b54b823-0b09-4156-bcc5-dccf10f441f6/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-21 00:49:00,163 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:49:00,163 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:49:00,164 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:49:00,164 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:49:00,171 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:49:00,172 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:49:00,172 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:49:00,172 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:49:00,173 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:49:00,173 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:49:00,174 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:49:00,174 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:49:00,175 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:49:00,175 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:49:00,175 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:49:00,175 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:49:00,176 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:49:00,176 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:49:00,177 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-21 00:49:00,177 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-21 00:49:00,177 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:49:00,177 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:49:00,178 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-21 00:49:00,178 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:49:00,179 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:49:00,179 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:49:00,179 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-21 00:49:00,179 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-21 00:49:00,180 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-21 00:49:00,180 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:49:00,180 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-21 00:49:00,180 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:49:00,181 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:49:00,181 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:49:00,181 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:49:00,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:49:00,182 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:49:00,182 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:49:00,182 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:49:00,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:49:00,184 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:49:00,184 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:49:00,185 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_0b54b823-0b09-4156-bcc5-dccf10f441f6/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b54b823-0b09-4156-bcc5-dccf10f441f6/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 60b44baec8d5c42666f1f962a9b95cfd7e6c75178322ade094b7a047963f4b64 [2021-11-21 00:49:00,578 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:49:00,626 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:49:00,629 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:49:00,631 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:49:00,632 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:49:00,633 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b54b823-0b09-4156-bcc5-dccf10f441f6/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/array-memsafety/diff_usafe.c [2021-11-21 00:49:00,728 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b54b823-0b09-4156-bcc5-dccf10f441f6/bin/utaipan-TEXQjIfE4P/data/a36135b3d/8607e114b75f4f3686ac5c07bd5a3146/FLAG50d8f2935 [2021-11-21 00:49:01,365 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:49:01,366 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b54b823-0b09-4156-bcc5-dccf10f441f6/sv-benchmarks/c/array-memsafety/diff_usafe.c [2021-11-21 00:49:01,373 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b54b823-0b09-4156-bcc5-dccf10f441f6/bin/utaipan-TEXQjIfE4P/data/a36135b3d/8607e114b75f4f3686ac5c07bd5a3146/FLAG50d8f2935 [2021-11-21 00:49:01,762 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b54b823-0b09-4156-bcc5-dccf10f441f6/bin/utaipan-TEXQjIfE4P/data/a36135b3d/8607e114b75f4f3686ac5c07bd5a3146 [2021-11-21 00:49:01,766 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:49:01,771 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:49:01,774 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:49:01,774 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:49:01,778 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:49:01,779 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:49:01" (1/1) ... [2021-11-21 00:49:01,781 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c23c4cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:01, skipping insertion in model container [2021-11-21 00:49:01,782 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:49:01" (1/1) ... [2021-11-21 00:49:01,791 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:49:01,809 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:49:02,113 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:49:02,127 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:49:02,155 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:49:02,178 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:49:02,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:02 WrapperNode [2021-11-21 00:49:02,179 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:49:02,182 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:49:02,182 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:49:02,182 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:49:02,191 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:02" (1/1) ... [2021-11-21 00:49:02,202 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:02" (1/1) ... [2021-11-21 00:49:02,225 INFO L137 Inliner]: procedures = 8, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 58 [2021-11-21 00:49:02,225 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:49:02,226 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:49:02,227 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:49:02,227 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:49:02,237 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:02" (1/1) ... [2021-11-21 00:49:02,238 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:02" (1/1) ... [2021-11-21 00:49:02,240 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:02" (1/1) ... [2021-11-21 00:49:02,240 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:02" (1/1) ... [2021-11-21 00:49:02,251 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:02" (1/1) ... [2021-11-21 00:49:02,255 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:02" (1/1) ... [2021-11-21 00:49:02,256 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:02" (1/1) ... [2021-11-21 00:49:02,258 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:49:02,259 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:49:02,260 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:49:02,260 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:49:02,261 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:02" (1/1) ... [2021-11-21 00:49:02,281 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:49:02,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b54b823-0b09-4156-bcc5-dccf10f441f6/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:49:02,315 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b54b823-0b09-4156-bcc5-dccf10f441f6/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:49:02,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b54b823-0b09-4156-bcc5-dccf10f441f6/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:49:02,368 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 00:49:02,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:49:02,369 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:49:02,369 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 00:49:02,447 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:49:02,450 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:49:02,681 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:49:02,714 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:49:02,714 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-21 00:49:02,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:49:02 BoogieIcfgContainer [2021-11-21 00:49:02,717 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:49:02,719 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:49:02,720 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:49:02,723 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:49:02,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:49:01" (1/3) ... [2021-11-21 00:49:02,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ecbeb1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:49:02, skipping insertion in model container [2021-11-21 00:49:02,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:02" (2/3) ... [2021-11-21 00:49:02,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ecbeb1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:49:02, skipping insertion in model container [2021-11-21 00:49:02,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:49:02" (3/3) ... [2021-11-21 00:49:02,727 INFO L111 eAbstractionObserver]: Analyzing ICFG diff_usafe.c [2021-11-21 00:49:02,734 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:49:02,734 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2021-11-21 00:49:02,838 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:49:02,847 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 [2021-11-21 00:49:02,849 INFO L340 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2021-11-21 00:49:02,869 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 10 states have (on average 2.2) internal successors, (22), 19 states have internal predecessors, (22), 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) [2021-11-21 00:49:02,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-21 00:49:02,880 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:49:02,881 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-21 00:49:02,883 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-21 00:49:02,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:49:02,896 INFO L85 PathProgramCache]: Analyzing trace with hash 87537, now seen corresponding path program 1 times [2021-11-21 00:49:02,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:49:02,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21395508] [2021-11-21 00:49:02,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:49:02,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:49:03,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:49:03,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:49:03,158 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:49:03,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21395508] [2021-11-21 00:49:03,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21395508] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:49:03,160 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:49:03,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-21 00:49:03,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62091757] [2021-11-21 00:49:03,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:49:03,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:49:03,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:49:03,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:49:03,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:49:03,210 INFO L87 Difference]: Start difference. First operand has 20 states, 10 states have (on average 2.2) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:49:03,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:49:03,271 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2021-11-21 00:49:03,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:49:03,274 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-21 00:49:03,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:49:03,284 INFO L225 Difference]: With dead ends: 19 [2021-11-21 00:49:03,284 INFO L226 Difference]: Without dead ends: 17 [2021-11-21 00:49:03,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:49:03,295 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 19 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:49:03,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 9 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:49:03,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-21 00:49:03,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-21 00:49:03,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 9 states have (on average 2.111111111111111) internal successors, (19), 16 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) [2021-11-21 00:49:03,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-11-21 00:49:03,334 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 3 [2021-11-21 00:49:03,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:49:03,335 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-11-21 00:49:03,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:49:03,336 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-11-21 00:49:03,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-21 00:49:03,336 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:49:03,336 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-21 00:49:03,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:49:03,338 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-21 00:49:03,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:49:03,344 INFO L85 PathProgramCache]: Analyzing trace with hash 2662612, now seen corresponding path program 1 times [2021-11-21 00:49:03,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:49:03,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210797948] [2021-11-21 00:49:03,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:49:03,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:49:03,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-21 00:49:03,382 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-21 00:49:03,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-21 00:49:03,448 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-21 00:49:03,449 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-21 00:49:03,451 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0REQUIRES_VIOLATION (8 of 9 remaining) [2021-11-21 00:49:03,453 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION (7 of 9 remaining) [2021-11-21 00:49:03,454 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION (6 of 9 remaining) [2021-11-21 00:49:03,454 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION (5 of 9 remaining) [2021-11-21 00:49:03,454 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION (4 of 9 remaining) [2021-11-21 00:49:03,455 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION (3 of 9 remaining) [2021-11-21 00:49:03,455 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION (2 of 9 remaining) [2021-11-21 00:49:03,455 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION (1 of 9 remaining) [2021-11-21 00:49:03,456 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (0 of 9 remaining) [2021-11-21 00:49:03,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 00:49:03,460 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2021-11-21 00:49:03,464 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-21 00:49:03,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 12:49:03 BoogieIcfgContainer [2021-11-21 00:49:03,516 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-21 00:49:03,517 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-21 00:49:03,517 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-21 00:49:03,518 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-21 00:49:03,518 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:49:02" (3/4) ... [2021-11-21 00:49:03,521 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-21 00:49:03,571 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b54b823-0b09-4156-bcc5-dccf10f441f6/bin/utaipan-TEXQjIfE4P/witness.graphml [2021-11-21 00:49:03,572 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-21 00:49:03,573 INFO L158 Benchmark]: Toolchain (without parser) took 1801.33ms. Allocated memory was 98.6MB in the beginning and 138.4MB in the end (delta: 39.8MB). Free memory was 65.2MB in the beginning and 114.5MB in the end (delta: -49.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 00:49:03,573 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 98.6MB. Free memory was 72.5MB in the beginning and 72.5MB in the end (delta: 27.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 00:49:03,574 INFO L158 Benchmark]: CACSL2BoogieTranslator took 405.38ms. Allocated memory is still 98.6MB. Free memory was 64.9MB in the beginning and 76.6MB in the end (delta: -11.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-21 00:49:03,575 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.07ms. Allocated memory is still 98.6MB. Free memory was 76.6MB in the beginning and 75.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 00:49:03,575 INFO L158 Benchmark]: Boogie Preprocessor took 32.11ms. Allocated memory is still 98.6MB. Free memory was 75.1MB in the beginning and 73.7MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 00:49:03,576 INFO L158 Benchmark]: RCFGBuilder took 458.07ms. Allocated memory is still 98.6MB. Free memory was 73.7MB in the beginning and 62.1MB in the end (delta: 11.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-21 00:49:03,577 INFO L158 Benchmark]: TraceAbstraction took 797.18ms. Allocated memory was 98.6MB in the beginning and 138.4MB in the end (delta: 39.8MB). Free memory was 61.6MB in the beginning and 116.5MB in the end (delta: -54.9MB). Peak memory consumption was 29.6MB. Max. memory is 16.1GB. [2021-11-21 00:49:03,578 INFO L158 Benchmark]: Witness Printer took 54.69ms. Allocated memory is still 138.4MB. Free memory was 116.5MB in the beginning and 114.5MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 00:49:03,581 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 98.6MB. Free memory was 72.5MB in the beginning and 72.5MB in the end (delta: 27.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 405.38ms. Allocated memory is still 98.6MB. Free memory was 64.9MB in the beginning and 76.6MB in the end (delta: -11.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 44.07ms. Allocated memory is still 98.6MB. Free memory was 76.6MB in the beginning and 75.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 32.11ms. Allocated memory is still 98.6MB. Free memory was 75.1MB in the beginning and 73.7MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 458.07ms. Allocated memory is still 98.6MB. Free memory was 73.7MB in the beginning and 62.1MB in the end (delta: 11.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 797.18ms. Allocated memory was 98.6MB in the beginning and 138.4MB in the end (delta: 39.8MB). Free memory was 61.6MB in the beginning and 116.5MB in the end (delta: -54.9MB). Peak memory consumption was 29.6MB. Max. memory is 16.1GB. * Witness Printer took 54.69ms. Allocated memory is still 138.4MB. Free memory was 116.5MB in the beginning and 114.5MB in the end (delta: 2.0MB). 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: 15]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L30] int *A; [L31] int Alen = __VERIFIER_nondet_int(); [L32] int *B; [L33] int Blen = __VERIFIER_nondet_int(); [L34] int *D; [L35] CALL diff(A, Alen, B, Blen, D) [L5] int k = 0; [L6] int i = 0; [L7] int l1 = Alen; [L8] int l2 = Blen; [L9] int found; VAL [\old(Alen)=2, \old(Blen)=3, A={5:7}, A={5:7}, Alen=2, B={6:9}, B={6:9}, Blen=3, D={8:4}, D={8:4}, i=0, k=0, l1=2, l2=3] [L11] COND TRUE i < l1 [L12] int j = 0; [L13] found = 0 VAL [\old(Alen)=2, \old(Blen)=3, A={5:7}, A={5:7}, Alen=2, B={6:9}, B={6:9}, Blen=3, D={8:4}, D={8:4}, found=0, i=0, j=0, k=0, l1=2, l2=3] [L14] COND TRUE j < l2 && !found VAL [\old(Alen)=2, \old(Blen)=3, A={5:7}, A={5:7}, Alen=2, B={6:9}, B={6:9}, Blen=3, D={8:4}, D={8:4}, found=0, i=0, j=0, k=0, l1=2, l2=3] [L15] A[i] - UnprovableResult [Line: 15]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 15]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 15]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 22]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 22]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 22]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 22]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 29]: 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, 9 error locations. Started 1 CEGAR loops. OverallTime: 0.6s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 19 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 19 mSDsluCounter, 9 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 12 IncrementalHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 9 mSDtfsCounter, 12 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, InterpolantAutomatonStates: 3, 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 7 NumberOfCodeBlocks, 7 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 2 ConstructedInterpolants, 0 QuantifiedInterpolants, 6 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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! [2021-11-21 00:49:03,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b54b823-0b09-4156-bcc5-dccf10f441f6/bin/utaipan-TEXQjIfE4P/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)