./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 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f916a2-8924-4775-8f52-5a23bc1f966e/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f916a2-8924-4775-8f52-5a23bc1f966e/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f916a2-8924-4775-8f52-5a23bc1f966e/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f916a2-8924-4775-8f52-5a23bc1f966e/bin/utaipan-WLngWcDbfI/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/diff_usafe.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f916a2-8924-4775-8f52-5a23bc1f966e/bin/utaipan-WLngWcDbfI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f916a2-8924-4775-8f52-5a23bc1f966e/bin/utaipan-WLngWcDbfI --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 36668c3ad6b05a2dc08891e0da2e8018cdda58e2 ............................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:20:14,740 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:20:14,743 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:20:14,807 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:20:14,808 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:20:14,813 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:20:14,816 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:20:14,820 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:20:14,822 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:20:14,828 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:20:14,829 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:20:14,831 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:20:14,831 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:20:14,835 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:20:14,836 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:20:14,838 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:20:14,840 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:20:14,845 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:20:14,847 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:20:14,853 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:20:14,855 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:20:14,860 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:20:14,865 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:20:14,866 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:20:14,875 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:20:14,876 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:20:14,876 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:20:14,878 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:20:14,879 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:20:14,881 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:20:14,881 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:20:14,882 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:20:14,884 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:20:14,886 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:20:14,887 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:20:14,887 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:20:14,888 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:20:14,888 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:20:14,889 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:20:14,890 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:20:14,891 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:20:14,894 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f916a2-8924-4775-8f52-5a23bc1f966e/bin/utaipan-WLngWcDbfI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-11 02:20:14,945 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:20:14,945 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:20:14,947 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:20:14,947 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:20:14,948 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:20:14,948 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:20:14,948 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:20:14,948 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:20:14,949 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:20:14,949 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:20:14,950 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:20:14,950 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:20:14,951 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:20:14,951 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:20:14,951 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:20:14,953 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-11 02:20:14,953 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-11 02:20:14,953 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:20:14,954 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:20:14,954 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-11 02:20:14,954 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:20:14,954 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:20:14,955 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:20:14,955 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-11 02:20:14,955 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-11 02:20:14,955 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-11 02:20:14,957 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:20:14,958 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:20:14,958 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:20:14,958 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:20:14,958 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:20:14,959 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:20:14,959 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:20:14,959 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:20:14,960 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:20:14,960 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:20:14,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:20:14,960 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:20:14,961 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:20:14,961 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_c6f916a2-8924-4775-8f52-5a23bc1f966e/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f916a2-8924-4775-8f52-5a23bc1f966e/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 36668c3ad6b05a2dc08891e0da2e8018cdda58e2 [2021-10-11 02:20:15,227 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:20:15,269 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:20:15,274 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:20:15,275 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:20:15,276 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:20:15,277 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f916a2-8924-4775-8f52-5a23bc1f966e/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/array-memsafety/diff_usafe.c [2021-10-11 02:20:15,357 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f916a2-8924-4775-8f52-5a23bc1f966e/bin/utaipan-WLngWcDbfI/data/ef6e82f40/cf810acc057248128e0c032d5e8d75db/FLAG1dba97dbb [2021-10-11 02:20:15,887 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:20:15,887 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f916a2-8924-4775-8f52-5a23bc1f966e/sv-benchmarks/c/array-memsafety/diff_usafe.c [2021-10-11 02:20:15,894 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f916a2-8924-4775-8f52-5a23bc1f966e/bin/utaipan-WLngWcDbfI/data/ef6e82f40/cf810acc057248128e0c032d5e8d75db/FLAG1dba97dbb [2021-10-11 02:20:16,260 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f916a2-8924-4775-8f52-5a23bc1f966e/bin/utaipan-WLngWcDbfI/data/ef6e82f40/cf810acc057248128e0c032d5e8d75db [2021-10-11 02:20:16,262 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:20:16,263 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:20:16,267 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:20:16,267 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:20:16,270 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:20:16,271 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:20:16" (1/1) ... [2021-10-11 02:20:16,273 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5012d546 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:16, skipping insertion in model container [2021-10-11 02:20:16,273 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:20:16" (1/1) ... [2021-10-11 02:20:16,280 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:20:16,292 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:20:16,451 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:20:16,460 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:20:16,475 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:20:16,487 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:20:16,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:16 WrapperNode [2021-10-11 02:20:16,488 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:20:16,489 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:20:16,489 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:20:16,489 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:20:16,497 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:16" (1/1) ... [2021-10-11 02:20:16,504 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:16" (1/1) ... [2021-10-11 02:20:16,525 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:20:16,526 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:20:16,526 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:20:16,526 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:20:16,535 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:16" (1/1) ... [2021-10-11 02:20:16,536 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:16" (1/1) ... [2021-10-11 02:20:16,538 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:16" (1/1) ... [2021-10-11 02:20:16,538 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:16" (1/1) ... [2021-10-11 02:20:16,543 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:16" (1/1) ... [2021-10-11 02:20:16,548 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:16" (1/1) ... [2021-10-11 02:20:16,549 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:16" (1/1) ... [2021-10-11 02:20:16,551 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:20:16,552 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:20:16,553 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:20:16,553 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:20:16,554 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:16" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f916a2-8924-4775-8f52-5a23bc1f966e/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:20:16,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-11 02:20:16,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:20:16,660 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:20:16,660 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-11 02:20:17,114 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:20:17,114 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-11 02:20:17,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:20:17 BoogieIcfgContainer [2021-10-11 02:20:17,117 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:20:17,119 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:20:17,119 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:20:17,123 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:20:17,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:20:16" (1/3) ... [2021-10-11 02:20:17,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60907a26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:20:17, skipping insertion in model container [2021-10-11 02:20:17,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:20:16" (2/3) ... [2021-10-11 02:20:17,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60907a26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:20:17, skipping insertion in model container [2021-10-11 02:20:17,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:20:17" (3/3) ... [2021-10-11 02:20:17,127 INFO L111 eAbstractionObserver]: Analyzing ICFG diff_usafe.c [2021-10-11 02:20:17,142 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:20:17,146 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2021-10-11 02:20:17,158 INFO L253 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2021-10-11 02:20:17,181 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:20:17,182 INFO L378 AbstractCegarLoop]: Hoare is false [2021-10-11 02:20:17,182 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:20:17,182 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:20:17,182 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:20:17,183 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:20:17,183 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:20:17,183 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:20:17,197 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2021-10-11 02:20:17,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-11 02:20:17,203 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:20:17,204 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-11 02:20:17,205 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:20:17,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:20:17,212 INFO L82 PathProgramCache]: Analyzing trace with hash 87599, now seen corresponding path program 1 times [2021-10-11 02:20:17,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:20:17,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193820761] [2021-10-11 02:20:17,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:20:17,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:20:17,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:20:17,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193820761] [2021-10-11 02:20:17,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:20:17,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-11 02:20:17,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347203616] [2021-10-11 02:20:17,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:20:17,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:20:17,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:20:17,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:20:17,411 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2021-10-11 02:20:17,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:20:17,447 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2021-10-11 02:20:17,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:20:17,449 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2021-10-11 02:20:17,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:20:17,458 INFO L225 Difference]: With dead ends: 19 [2021-10-11 02:20:17,458 INFO L226 Difference]: Without dead ends: 17 [2021-10-11 02:20:17,460 INFO L677 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 [2021-10-11 02:20:17,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-11 02:20:17,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-10-11 02:20:17,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-10-11 02:20:17,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-10-11 02:20:17,492 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 3 [2021-10-11 02:20:17,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:20:17,493 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-10-11 02:20:17,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:20:17,493 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-10-11 02:20:17,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-11 02:20:17,494 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:20:17,494 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-11 02:20:17,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:20:17,495 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:20:17,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:20:17,496 INFO L82 PathProgramCache]: Analyzing trace with hash 2662612, now seen corresponding path program 1 times [2021-10-11 02:20:17,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:20:17,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139973237] [2021-10-11 02:20:17,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:20:17,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:20:17,518 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:20:17,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:20:17,534 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:20:17,555 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-11 02:20:17,555 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:20:17,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:20:17,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:20:17 BoogieIcfgContainer [2021-10-11 02:20:17,579 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:20:17,579 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:20:17,580 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:20:17,580 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:20:17,581 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:20:17" (3/4) ... [2021-10-11 02:20:17,583 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-11 02:20:17,623 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6f916a2-8924-4775-8f52-5a23bc1f966e/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:20:17,623 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:20:17,626 INFO L168 Benchmark]: Toolchain (without parser) took 1361.17 ms. Allocated memory was 94.4 MB in the beginning and 123.7 MB in the end (delta: 29.4 MB). Free memory was 61.7 MB in the beginning and 53.1 MB in the end (delta: 8.6 MB). Peak memory consumption was 34.7 MB. Max. memory is 16.1 GB. [2021-10-11 02:20:17,626 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 94.4 MB. Free memory was 53.6 MB in the beginning and 53.5 MB in the end (delta: 43.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:20:17,627 INFO L168 Benchmark]: CACSL2BoogieTranslator took 221.49 ms. Allocated memory was 94.4 MB in the beginning and 123.7 MB in the end (delta: 29.4 MB). Free memory was 61.5 MB in the beginning and 100.7 MB in the end (delta: -39.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:20:17,628 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.30 ms. Allocated memory is still 123.7 MB. Free memory was 100.2 MB in the beginning and 99.2 MB in the end (delta: 987.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:20:17,629 INFO L168 Benchmark]: Boogie Preprocessor took 25.87 ms. Allocated memory is still 123.7 MB. Free memory was 99.2 MB in the beginning and 98.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:20:17,630 INFO L168 Benchmark]: RCFGBuilder took 564.76 ms. Allocated memory is still 123.7 MB. Free memory was 97.5 MB in the beginning and 77.1 MB in the end (delta: 20.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-10-11 02:20:17,631 INFO L168 Benchmark]: TraceAbstraction took 459.80 ms. Allocated memory is still 123.7 MB. Free memory was 76.6 MB in the beginning and 55.2 MB in the end (delta: 21.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-10-11 02:20:17,631 INFO L168 Benchmark]: Witness Printer took 44.16 ms. Allocated memory is still 123.7 MB. Free memory was 54.6 MB in the beginning and 53.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:20:17,635 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 94.4 MB. Free memory was 53.6 MB in the beginning and 53.5 MB in the end (delta: 43.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 221.49 ms. Allocated memory was 94.4 MB in the beginning and 123.7 MB in the end (delta: 29.4 MB). Free memory was 61.5 MB in the beginning and 100.7 MB in the end (delta: -39.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 36.30 ms. Allocated memory is still 123.7 MB. Free memory was 100.2 MB in the beginning and 99.2 MB in the end (delta: 987.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 25.87 ms. Allocated memory is still 123.7 MB. Free memory was 99.2 MB in the beginning and 98.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 564.76 ms. Allocated memory is still 123.7 MB. Free memory was 97.5 MB in the beginning and 77.1 MB in the end (delta: 20.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 459.80 ms. Allocated memory is still 123.7 MB. Free memory was 76.6 MB in the beginning and 55.2 MB in the end (delta: 21.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * Witness Printer took 44.16 ms. Allocated memory is still 123.7 MB. Free memory was 54.6 MB in the beginning and 53.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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; [L5] int k = 0; [L6] int i = 0; [L7] int l1 = Alen; [L8] int l2 = Blen; [L9] int found; [L11] COND TRUE i < l1 [L12] int j = 0; [L13] found = 0 [L14] COND TRUE j < l2 && !found [L15] A[i] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 9 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 12 SDtfs, 19 SDslu, 0 SDs, 0 SdLazy, 9 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, 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, 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, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 7 NumberOfCodeBlocks, 7 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 2 ConstructedInterpolants, 0 QuantifiedInterpolants, 12 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! Received shutdown request...