./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/reverse_array_alloca_unsafe.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 69874e26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_33f748f9-b522-4c7a-9357-582dd41e11eb/bin/ukojak/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_33f748f9-b522-4c7a-9357-582dd41e11eb/bin/ukojak/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_33f748f9-b522-4c7a-9357-582dd41e11eb/bin/ukojak/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_33f748f9-b522-4c7a-9357-582dd41e11eb/bin/ukojak/config/KojakMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/reverse_array_alloca_unsafe.i -s /tmp/vcloud-vcloud-master/worker/run_dir_33f748f9-b522-4c7a-9357-582dd41e11eb/bin/ukojak/config/svcomp-DerefFreeMemtrack-32bit-Kojak_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_33f748f9-b522-4c7a-9357-582dd41e11eb/bin/ukojak --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 Kojak --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 016c9c68c49c3eaa925dd855e3c8f320ab9c50c9 ............................................................................................................................................................................................................................................................................................................................... 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 0.2.0-69874e2 [2020-12-01 16:22:35,237 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-01 16:22:35,259 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-01 16:22:35,339 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-01 16:22:35,340 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-01 16:22:35,343 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-01 16:22:35,345 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-01 16:22:35,349 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-01 16:22:35,353 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-01 16:22:35,354 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-01 16:22:35,356 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-01 16:22:35,358 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-01 16:22:35,359 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-01 16:22:35,361 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-01 16:22:35,362 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-01 16:22:35,364 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-01 16:22:35,366 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-01 16:22:35,367 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-01 16:22:35,370 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-01 16:22:35,373 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-01 16:22:35,376 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-01 16:22:35,378 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-01 16:22:35,380 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-01 16:22:35,381 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-01 16:22:35,386 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-01 16:22:35,387 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-01 16:22:35,387 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-01 16:22:35,389 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-01 16:22:35,389 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-01 16:22:35,391 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-01 16:22:35,392 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-01 16:22:35,393 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-01 16:22:35,394 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-01 16:22:35,395 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-01 16:22:35,397 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-01 16:22:35,397 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-01 16:22:35,398 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-01 16:22:35,399 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-01 16:22:35,400 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-01 16:22:35,401 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-01 16:22:35,402 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-01 16:22:35,403 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_33f748f9-b522-4c7a-9357-582dd41e11eb/bin/ukojak/config/svcomp-DerefFreeMemtrack-32bit-Kojak_Default.epf [2020-12-01 16:22:35,434 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-01 16:22:35,434 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-01 16:22:35,436 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-01 16:22:35,436 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-01 16:22:35,437 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-01 16:22:35,437 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-01 16:22:35,438 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-01 16:22:35,438 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-01 16:22:35,438 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-01 16:22:35,439 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-01 16:22:35,439 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-01 16:22:35,440 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-01 16:22:35,440 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-01 16:22:35,440 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-01 16:22:35,441 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-01 16:22:35,441 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-01 16:22:35,441 INFO L136 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2020-12-01 16:22:35,442 INFO L138 SettingsManager]: * Timeout in seconds=1000000 [2020-12-01 16:22:35,442 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-01 16:22:35,442 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-01 16:22:35,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2020-12-01 16:22:35,443 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-01 16:22:35,443 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-01 16:22:35,444 INFO L138 SettingsManager]: * Trace refinement strategy=PENGUIN [2020-12-01 16:22:35,444 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-01 16:22:35,445 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_33f748f9-b522-4c7a-9357-582dd41e11eb/bin/ukojak/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_33f748f9-b522-4c7a-9357-582dd41e11eb/bin/ukojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Kojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 016c9c68c49c3eaa925dd855e3c8f320ab9c50c9 [2020-12-01 16:22:35,766 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-01 16:22:35,818 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-01 16:22:35,823 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-01 16:22:35,824 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-01 16:22:35,825 INFO L275 PluginConnector]: CDTParser initialized [2020-12-01 16:22:35,827 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_33f748f9-b522-4c7a-9357-582dd41e11eb/bin/ukojak/../../sv-benchmarks/c/array-memsafety/reverse_array_alloca_unsafe.i [2020-12-01 16:22:35,919 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_33f748f9-b522-4c7a-9357-582dd41e11eb/bin/ukojak/data/101a4fb72/b562fc6029c0479a80158f2bb6f16997/FLAGeb186cb99 [2020-12-01 16:22:36,783 INFO L306 CDTParser]: Found 1 translation units. [2020-12-01 16:22:36,784 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_33f748f9-b522-4c7a-9357-582dd41e11eb/sv-benchmarks/c/array-memsafety/reverse_array_alloca_unsafe.i [2020-12-01 16:22:36,799 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_33f748f9-b522-4c7a-9357-582dd41e11eb/bin/ukojak/data/101a4fb72/b562fc6029c0479a80158f2bb6f16997/FLAGeb186cb99 [2020-12-01 16:22:36,988 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_33f748f9-b522-4c7a-9357-582dd41e11eb/bin/ukojak/data/101a4fb72/b562fc6029c0479a80158f2bb6f16997 [2020-12-01 16:22:36,995 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-01 16:22:36,999 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-01 16:22:37,007 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-01 16:22:37,007 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-01 16:22:37,012 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-01 16:22:37,013 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 04:22:36" (1/1) ... [2020-12-01 16:22:37,017 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40e05566 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:22:37, skipping insertion in model container [2020-12-01 16:22:37,017 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 04:22:36" (1/1) ... [2020-12-01 16:22:37,027 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-01 16:22:37,090 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-01 16:22:37,546 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 16:22:37,558 INFO L203 MainTranslator]: Completed pre-run [2020-12-01 16:22:37,611 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 16:22:37,686 INFO L208 MainTranslator]: Completed translation [2020-12-01 16:22:37,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:22:37 WrapperNode [2020-12-01 16:22:37,687 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-01 16:22:37,689 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-01 16:22:37,689 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-01 16:22:37,689 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-01 16:22:37,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:22:37" (1/1) ... [2020-12-01 16:22:37,718 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:22:37" (1/1) ... [2020-12-01 16:22:37,748 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-01 16:22:37,750 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-01 16:22:37,750 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-01 16:22:37,750 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-01 16:22:37,762 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:22:37" (1/1) ... [2020-12-01 16:22:37,762 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:22:37" (1/1) ... [2020-12-01 16:22:37,766 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:22:37" (1/1) ... [2020-12-01 16:22:37,767 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:22:37" (1/1) ... [2020-12-01 16:22:37,775 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:22:37" (1/1) ... [2020-12-01 16:22:37,783 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:22:37" (1/1) ... [2020-12-01 16:22:37,785 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:22:37" (1/1) ... [2020-12-01 16:22:37,797 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-01 16:22:37,798 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-01 16:22:37,798 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-01 16:22:37,798 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-01 16:22:37,800 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 04:22:37" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_33f748f9-b522-4c7a-9357-582dd41e11eb/bin/ukojak/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (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:10000 [2020-12-01 16:22:37,883 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-01 16:22:37,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-01 16:22:37,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-01 16:22:37,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-01 16:22:37,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-01 16:22:37,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-01 16:22:38,917 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-01 16:22:38,918 INFO L298 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-01 16:22:38,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 04:22:38 BoogieIcfgContainer [2020-12-01 16:22:38,926 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-01 16:22:38,928 INFO L113 PluginConnector]: ------------------------CodeCheck---------------------------- [2020-12-01 16:22:38,928 INFO L271 PluginConnector]: Initializing CodeCheck... [2020-12-01 16:22:38,944 INFO L275 PluginConnector]: CodeCheck initialized [2020-12-01 16:22:38,946 INFO L185 PluginConnector]: Executing the observer CodeCheckObserver from plugin CodeCheck for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 04:22:38" (1/1) ... [2020-12-01 16:22:38,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 16:22:39,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 16:22:39,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 44 states and 49 transitions. [2020-12-01 16:22:39,018 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2020-12-01 16:22:39,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-01 16:22:39,021 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 16:22:39,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 16:22:39,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 16:22:39,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 16:22:39,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 43 states and 48 transitions. [2020-12-01 16:22:39,327 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2020-12-01 16:22:39,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-01 16:22:39,328 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 16:22:39,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 16:22:39,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 16:22:39,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 16:22:39,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 45 states and 52 transitions. [2020-12-01 16:22:39,869 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2020-12-01 16:22:39,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-01 16:22:39,869 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 16:22:39,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 16:22:39,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 16:22:39,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 16:22:39,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 47 states and 56 transitions. [2020-12-01 16:22:39,924 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2020-12-01 16:22:39,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-01 16:22:39,924 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 16:22:39,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 16:22:40,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 16:22:40,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 16:22:40,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 47 states and 55 transitions. [2020-12-01 16:22:40,245 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-12-01 16:22:40,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-01 16:22:40,245 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 16:22:40,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 16:22:40,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 16:22:41,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 16:22:41,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 50 states and 61 transitions. [2020-12-01 16:22:41,118 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 61 transitions. [2020-12-01 16:22:41,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-01 16:22:41,124 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 16:22:41,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 16:22:41,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 16:22:41,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 16:22:41,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 51 states and 64 transitions. [2020-12-01 16:22:41,980 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2020-12-01 16:22:41,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-01 16:22:41,981 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 16:22:42,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 16:22:42,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 16:22:42,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 16:22:42,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 52 states and 65 transitions. [2020-12-01 16:22:42,057 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2020-12-01 16:22:42,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-01 16:22:42,058 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 16:22:42,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 16:22:42,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 16:22:43,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 16:22:43,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 54 states and 69 transitions. [2020-12-01 16:22:43,199 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2020-12-01 16:22:43,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-01 16:22:43,200 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 16:22:43,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 16:22:43,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 16:22:43,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 16:22:43,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 50 states and 60 transitions. [2020-12-01 16:22:43,768 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2020-12-01 16:22:43,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-01 16:22:43,768 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 16:22:43,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 16:22:43,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 16:22:43,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 16:22:43,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 49 states and 59 transitions. [2020-12-01 16:22:43,802 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2020-12-01 16:22:43,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-01 16:22:43,803 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 16:22:43,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 16:22:43,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-01 16:22:44,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 16:22:44,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 51 states and 62 transitions. [2020-12-01 16:22:44,074 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2020-12-01 16:22:44,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-01 16:22:44,075 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 16:22:44,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 16:22:44,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 16:22:44,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 16:22:44,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 50 states and 61 transitions. [2020-12-01 16:22:44,106 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 61 transitions. [2020-12-01 16:22:44,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-01 16:22:44,108 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 16:22:44,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 16:22:44,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-01 16:22:44,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 16:22:44,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 51 states and 62 transitions. [2020-12-01 16:22:44,218 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2020-12-01 16:22:44,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-01 16:22:44,221 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 16:22:44,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 16:22:44,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-01 16:22:44,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-12-01 16:22:44,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 46 states and 55 transitions. [2020-12-01 16:22:44,285 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2020-12-01 16:22:44,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-01 16:22:44,285 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-12-01 16:22:44,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 16:22:44,310 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 16:22:44,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 16:22:44,325 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 16:22:44,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 16:22:44,374 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 16:22:44,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 16:22:44,389 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 16:22:44,523 WARN L483 CodeCheckObserver]: This program is UNSAFE, Check terminated with 15 iterations. [2020-12-01 16:22:44,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck CFG 01.12 04:22:44 ImpRootNode [2020-12-01 16:22:44,568 INFO L132 PluginConnector]: ------------------------ END CodeCheck---------------------------- [2020-12-01 16:22:44,569 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-01 16:22:44,569 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-01 16:22:44,570 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-01 16:22:44,570 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 04:22:38" (3/4) ... [2020-12-01 16:22:44,573 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-01 16:22:44,645 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_33f748f9-b522-4c7a-9357-582dd41e11eb/bin/ukojak/witness.graphml [2020-12-01 16:22:44,645 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-01 16:22:44,647 INFO L168 Benchmark]: Toolchain (without parser) took 7646.81 ms. Allocated memory was 100.7 MB in the beginning and 146.8 MB in the end (delta: 46.1 MB). Free memory was 68.3 MB in the beginning and 51.5 MB in the end (delta: 16.8 MB). Peak memory consumption was 63.8 MB. Max. memory is 16.1 GB. [2020-12-01 16:22:44,648 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 71.3 MB. Free memory was 33.9 MB in the beginning and 33.8 MB in the end (delta: 37.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 16:22:44,649 INFO L168 Benchmark]: CACSL2BoogieTranslator took 680.60 ms. Allocated memory is still 100.7 MB. Free memory was 68.1 MB in the beginning and 67.7 MB in the end (delta: 469.7 kB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-01 16:22:44,650 INFO L168 Benchmark]: Boogie Procedure Inliner took 60.34 ms. Allocated memory is still 100.7 MB. Free memory was 67.7 MB in the beginning and 65.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 16:22:44,651 INFO L168 Benchmark]: Boogie Preprocessor took 47.10 ms. Allocated memory is still 100.7 MB. Free memory was 65.6 MB in the beginning and 64.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 16:22:44,652 INFO L168 Benchmark]: RCFGBuilder took 1128.77 ms. Allocated memory is still 100.7 MB. Free memory was 64.0 MB in the beginning and 77.0 MB in the end (delta: -13.0 MB). Peak memory consumption was 38.0 MB. Max. memory is 16.1 GB. [2020-12-01 16:22:44,653 INFO L168 Benchmark]: CodeCheck took 5640.78 ms. Allocated memory was 100.7 MB in the beginning and 146.8 MB in the end (delta: 46.1 MB). Free memory was 77.0 MB in the beginning and 53.6 MB in the end (delta: 23.4 MB). Peak memory consumption was 70.4 MB. Max. memory is 16.1 GB. [2020-12-01 16:22:44,654 INFO L168 Benchmark]: Witness Printer took 76.11 ms. Allocated memory is still 146.8 MB. Free memory was 53.6 MB in the beginning and 51.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 16:22:44,660 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck: - StatisticsResult: Ultimate CodeCheck benchmark data CFG has 1 procedures, 44 locations, 23 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.5s, OverallIterations: 15, TraceHistogramMax: 0, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 49312 SDtfs, 53098 SDslu, 37256 SDs, 0 SdLazy, 210142 SolverSat, 77924 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 697 GetRequests, 601 SyntacticMatches, 20 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2674 ImplicationChecksByTransitivity, 3.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, traceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 98 NumberOfCodeBlocks, 98 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 74 ConstructedInterpolants, 0 QuantifiedInterpolants, 3049 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 10 PerfectInterpolantSequences, 8/17 InterpolantCoveringCapability, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - CounterExampleResult [Line: 529]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L515] int i, j, tmp; [L516] int length = __VERIFIER_nondet_int(); [L517] COND FALSE !(length < 1) [L518] COND FALSE !(length % 2 == 0) [L519] int *arr = __builtin_alloca (length*sizeof(int)); [L521] int i = 0; [L521] COND TRUE i < length [L523] arr[i] = __VERIFIER_nondet_int() [L521] i++ [L521] COND FALSE !(i < length) [L526] i=0 [L526] COND TRUE i