./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-vcloud-master/worker/run_dir_69791463-4abe-4433-aa87-414a6c08b72e/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_69791463-4abe-4433-aa87-414a6c08b72e/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_69791463-4abe-4433-aa87-414a6c08b72e/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_69791463-4abe-4433-aa87-414a6c08b72e/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/diff_usafe.c -s /tmp/vcloud-vcloud-master/worker/run_dir_69791463-4abe-4433-aa87-414a6c08b72e/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_69791463-4abe-4433-aa87-414a6c08b72e/bin/utaipan --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 [2020-12-09 12:08:16,436 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 12:08:16,438 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 12:08:16,468 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 12:08:16,469 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 12:08:16,470 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 12:08:16,471 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 12:08:16,473 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 12:08:16,474 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 12:08:16,475 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 12:08:16,476 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 12:08:16,477 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 12:08:16,477 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 12:08:16,478 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 12:08:16,479 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 12:08:16,480 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 12:08:16,481 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 12:08:16,481 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 12:08:16,483 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 12:08:16,485 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 12:08:16,486 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 12:08:16,487 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 12:08:16,489 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 12:08:16,490 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 12:08:16,493 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 12:08:16,493 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 12:08:16,494 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 12:08:16,495 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 12:08:16,495 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 12:08:16,496 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 12:08:16,497 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 12:08:16,498 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 12:08:16,499 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 12:08:16,499 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 12:08:16,500 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 12:08:16,501 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 12:08:16,501 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 12:08:16,502 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 12:08:16,502 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 12:08:16,503 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 12:08:16,503 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 12:08:16,504 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_69791463-4abe-4433-aa87-414a6c08b72e/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-12-09 12:08:16,522 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 12:08:16,522 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 12:08:16,523 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 12:08:16,523 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 12:08:16,523 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 12:08:16,523 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 12:08:16,523 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 12:08:16,523 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 12:08:16,524 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 12:08:16,524 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 12:08:16,524 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 12:08:16,524 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 12:08:16,524 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 12:08:16,524 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 12:08:16,524 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 12:08:16,525 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 12:08:16,525 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 12:08:16,525 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 12:08:16,525 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 12:08:16,525 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 12:08:16,525 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 12:08:16,525 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 12:08:16,525 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 12:08:16,526 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 12:08:16,526 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 12:08:16,526 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-09 12:08:16,526 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 12:08:16,526 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 12:08:16,526 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 12:08:16,526 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 12:08:16,526 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 12:08:16,526 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 12:08:16,527 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 12:08:16,527 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 12:08:16,527 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 12:08:16,527 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 12:08:16,527 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 12:08:16,527 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 12:08:16,527 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 12:08:16,527 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-vcloud-master/worker/run_dir_69791463-4abe-4433-aa87-414a6c08b72e/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_69791463-4abe-4433-aa87-414a6c08b72e/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 36668c3ad6b05a2dc08891e0da2e8018cdda58e2 [2020-12-09 12:08:16,720 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 12:08:16,740 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 12:08:16,742 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 12:08:16,743 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 12:08:16,743 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 12:08:16,744 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_69791463-4abe-4433-aa87-414a6c08b72e/bin/utaipan/../../sv-benchmarks/c/array-memsafety/diff_usafe.c [2020-12-09 12:08:16,787 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_69791463-4abe-4433-aa87-414a6c08b72e/bin/utaipan/data/5b24d4d65/f81b949532fe4b54bf11d0a43a87f858/FLAGa40d154ab [2020-12-09 12:08:17,147 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 12:08:17,148 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_69791463-4abe-4433-aa87-414a6c08b72e/sv-benchmarks/c/array-memsafety/diff_usafe.c [2020-12-09 12:08:17,152 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_69791463-4abe-4433-aa87-414a6c08b72e/bin/utaipan/data/5b24d4d65/f81b949532fe4b54bf11d0a43a87f858/FLAGa40d154ab [2020-12-09 12:08:17,161 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_69791463-4abe-4433-aa87-414a6c08b72e/bin/utaipan/data/5b24d4d65/f81b949532fe4b54bf11d0a43a87f858 [2020-12-09 12:08:17,163 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 12:08:17,164 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 12:08:17,165 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 12:08:17,165 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 12:08:17,168 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 12:08:17,168 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 12:08:17" (1/1) ... [2020-12-09 12:08:17,170 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@292d29ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:08:17, skipping insertion in model container [2020-12-09 12:08:17,170 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 12:08:17" (1/1) ... [2020-12-09 12:08:17,175 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 12:08:17,185 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 12:08:17,319 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 12:08:17,327 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 12:08:17,342 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 12:08:17,355 INFO L208 MainTranslator]: Completed translation [2020-12-09 12:08:17,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:08:17 WrapperNode [2020-12-09 12:08:17,355 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 12:08:17,356 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 12:08:17,357 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 12:08:17,357 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 12:08:17,364 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:08:17" (1/1) ... [2020-12-09 12:08:17,370 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:08:17" (1/1) ... [2020-12-09 12:08:17,388 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 12:08:17,389 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 12:08:17,389 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 12:08:17,389 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 12:08:17,397 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:08:17" (1/1) ... [2020-12-09 12:08:17,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:08:17" (1/1) ... [2020-12-09 12:08:17,399 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:08:17" (1/1) ... [2020-12-09 12:08:17,400 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:08:17" (1/1) ... [2020-12-09 12:08:17,404 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:08:17" (1/1) ... [2020-12-09 12:08:17,408 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:08:17" (1/1) ... [2020-12-09 12:08:17,409 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:08:17" (1/1) ... [2020-12-09 12:08:17,411 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 12:08:17,412 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 12:08:17,412 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 12:08:17,412 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 12:08:17,413 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:08:17" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_69791463-4abe-4433-aa87-414a6c08b72e/bin/utaipan/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 [2020-12-09 12:08:17,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 12:08:17,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 12:08:17,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 12:08:17,479 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 12:08:17,714 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 12:08:17,715 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-09 12:08:17,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:08:17 BoogieIcfgContainer [2020-12-09 12:08:17,716 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 12:08:17,717 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 12:08:17,718 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 12:08:17,720 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 12:08:17,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 12:08:17" (1/3) ... [2020-12-09 12:08:17,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e509272 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 12:08:17, skipping insertion in model container [2020-12-09 12:08:17,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:08:17" (2/3) ... [2020-12-09 12:08:17,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e509272 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 12:08:17, skipping insertion in model container [2020-12-09 12:08:17,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:08:17" (3/3) ... [2020-12-09 12:08:17,723 INFO L111 eAbstractionObserver]: Analyzing ICFG diff_usafe.c [2020-12-09 12:08:17,733 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 12:08:17,735 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2020-12-09 12:08:17,742 INFO L253 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2020-12-09 12:08:17,757 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 12:08:17,757 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 12:08:17,757 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 12:08:17,758 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 12:08:17,758 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 12:08:17,758 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 12:08:17,758 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 12:08:17,758 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 12:08:17,767 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-12-09 12:08:17,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 12:08:17,770 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:08:17,771 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 12:08:17,771 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]=== [2020-12-09 12:08:17,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:08:17,775 INFO L82 PathProgramCache]: Analyzing trace with hash 87599, now seen corresponding path program 1 times [2020-12-09 12:08:17,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:08:17,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896994304] [2020-12-09 12:08:17,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:08:17,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:08:17,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:08:17,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896994304] [2020-12-09 12:08:17,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:08:17,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 12:08:17,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496625784] [2020-12-09 12:08:17,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 12:08:17,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:08:17,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 12:08:17,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 12:08:17,898 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2020-12-09 12:08:17,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:08:17,922 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2020-12-09 12:08:17,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 12:08:17,923 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-09 12:08:17,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:08:17,929 INFO L225 Difference]: With dead ends: 19 [2020-12-09 12:08:17,929 INFO L226 Difference]: Without dead ends: 17 [2020-12-09 12:08:17,930 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 [2020-12-09 12:08:17,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-09 12:08:17,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-09 12:08:17,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-09 12:08:17,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-12-09 12:08:17,956 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 3 [2020-12-09 12:08:17,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:08:17,956 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-12-09 12:08:17,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 12:08:17,957 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-12-09 12:08:17,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 12:08:17,957 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:08:17,957 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 12:08:17,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 12:08:17,957 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]=== [2020-12-09 12:08:17,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:08:17,958 INFO L82 PathProgramCache]: Analyzing trace with hash 2662612, now seen corresponding path program 1 times [2020-12-09 12:08:17,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:08:17,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917621329] [2020-12-09 12:08:17,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:08:17,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 12:08:17,972 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 12:08:17,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 12:08:17,982 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 12:08:17,995 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 12:08:17,995 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 12:08:17,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 12:08:18,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 12:08:18 BoogieIcfgContainer [2020-12-09 12:08:18,010 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 12:08:18,011 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 12:08:18,011 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 12:08:18,011 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 12:08:18,011 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:08:17" (3/4) ... [2020-12-09 12:08:18,012 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 12:08:18,039 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_69791463-4abe-4433-aa87-414a6c08b72e/bin/utaipan/witness.graphml [2020-12-09 12:08:18,039 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 12:08:18,040 INFO L168 Benchmark]: Toolchain (without parser) took 875.66 ms. Allocated memory is still 90.2 MB. Free memory was 49.8 MB in the beginning and 61.0 MB in the end (delta: -11.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 12:08:18,041 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 90.2 MB. Free memory was 65.8 MB in the beginning and 65.7 MB in the end (delta: 115.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 12:08:18,041 INFO L168 Benchmark]: CACSL2BoogieTranslator took 190.49 ms. Allocated memory is still 90.2 MB. Free memory was 49.5 MB in the beginning and 62.5 MB in the end (delta: -12.9 MB). Peak memory consumption was 4.8 MB. Max. memory is 16.1 GB. [2020-12-09 12:08:18,042 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.84 ms. Allocated memory is still 90.2 MB. Free memory was 62.5 MB in the beginning and 60.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 12:08:18,042 INFO L168 Benchmark]: Boogie Preprocessor took 21.90 ms. Allocated memory is still 90.2 MB. Free memory was 60.9 MB in the beginning and 60.0 MB in the end (delta: 962.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 12:08:18,043 INFO L168 Benchmark]: RCFGBuilder took 304.82 ms. Allocated memory is still 90.2 MB. Free memory was 59.7 MB in the beginning and 55.1 MB in the end (delta: 4.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 12:08:18,043 INFO L168 Benchmark]: TraceAbstraction took 292.98 ms. Allocated memory is still 90.2 MB. Free memory was 54.7 MB in the beginning and 63.1 MB in the end (delta: -8.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 12:08:18,043 INFO L168 Benchmark]: Witness Printer took 28.45 ms. Allocated memory is still 90.2 MB. Free memory was 63.1 MB in the beginning and 61.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 12:08:18,046 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 90.2 MB. Free memory was 65.8 MB in the beginning and 65.7 MB in the end (delta: 115.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 190.49 ms. Allocated memory is still 90.2 MB. Free memory was 49.5 MB in the beginning and 62.5 MB in the end (delta: -12.9 MB). Peak memory consumption was 4.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 31.84 ms. Allocated memory is still 90.2 MB. Free memory was 62.5 MB in the beginning and 60.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.90 ms. Allocated memory is still 90.2 MB. Free memory was 60.9 MB in the beginning and 60.0 MB in the end (delta: 962.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 304.82 ms. Allocated memory is still 90.2 MB. Free memory was 59.7 MB in the beginning and 55.1 MB in the end (delta: 4.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 292.98 ms. Allocated memory is still 90.2 MB. Free memory was 54.7 MB in the beginning and 63.1 MB in the end (delta: -8.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 28.45 ms. Allocated memory is still 90.2 MB. Free memory was 63.1 MB in the beginning and 61.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. 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: 0.2s, 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...