./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/loops/invert_string-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_c7d71347-7bd6-4a22-ae5f-de502a100cb7/bin/ukojak/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_c7d71347-7bd6-4a22-ae5f-de502a100cb7/bin/ukojak/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_c7d71347-7bd6-4a22-ae5f-de502a100cb7/bin/ukojak/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_c7d71347-7bd6-4a22-ae5f-de502a100cb7/bin/ukojak/config/KojakMemDerefMemtrack.xml -i ../../sv-benchmarks/c/loops/invert_string-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_c7d71347-7bd6-4a22-ae5f-de502a100cb7/bin/ukojak/config/svcomp-DerefFreeMemtrack-32bit-Kojak_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_c7d71347-7bd6-4a22-ae5f-de502a100cb7/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 87b189dc1f4e4e7b15d899fcbb97cc91a55d1376 ......................................................................................................................................................................................................................................... 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-a4ecdab [2020-11-29 21:28:32,764 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 21:28:32,767 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 21:28:32,809 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 21:28:32,810 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 21:28:32,818 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 21:28:32,821 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 21:28:32,828 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 21:28:32,838 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 21:28:32,844 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 21:28:32,845 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 21:28:32,846 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 21:28:32,846 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 21:28:32,847 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 21:28:32,851 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 21:28:32,854 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 21:28:32,855 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 21:28:32,856 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 21:28:32,861 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 21:28:32,868 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 21:28:32,871 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 21:28:32,872 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 21:28:32,875 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 21:28:32,876 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 21:28:32,884 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 21:28:32,885 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 21:28:32,885 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 21:28:32,887 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 21:28:32,888 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 21:28:32,889 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 21:28:32,889 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 21:28:32,890 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 21:28:32,893 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 21:28:32,896 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 21:28:32,897 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 21:28:32,897 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 21:28:32,898 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 21:28:32,898 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 21:28:32,898 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 21:28:32,899 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 21:28:32,901 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 21:28:32,905 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_c7d71347-7bd6-4a22-ae5f-de502a100cb7/bin/ukojak/config/svcomp-DerefFreeMemtrack-32bit-Kojak_Default.epf [2020-11-29 21:28:32,936 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 21:28:32,936 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 21:28:32,937 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 21:28:32,938 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 21:28:32,938 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 21:28:32,938 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 21:28:32,938 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-29 21:28:32,938 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 21:28:32,939 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 21:28:32,939 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 21:28:32,939 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-29 21:28:32,939 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-29 21:28:32,939 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-29 21:28:32,940 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 21:28:32,940 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 21:28:32,940 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 21:28:32,940 INFO L136 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2020-11-29 21:28:32,940 INFO L138 SettingsManager]: * Timeout in seconds=1000000 [2020-11-29 21:28:32,941 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 21:28:32,941 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 21:28:32,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2020-11-29 21:28:32,941 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 21:28:32,941 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 21:28:32,942 INFO L138 SettingsManager]: * Trace refinement strategy=PENGUIN [2020-11-29 21:28:32,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 21:28:32,942 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_c7d71347-7bd6-4a22-ae5f-de502a100cb7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_c7d71347-7bd6-4a22-ae5f-de502a100cb7/bin/ukojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Kojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 87b189dc1f4e4e7b15d899fcbb97cc91a55d1376 [2020-11-29 21:28:33,189 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 21:28:33,214 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 21:28:33,219 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 21:28:33,221 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 21:28:33,221 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 21:28:33,222 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_c7d71347-7bd6-4a22-ae5f-de502a100cb7/bin/ukojak/../../sv-benchmarks/c/loops/invert_string-2.c [2020-11-29 21:28:33,296 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c7d71347-7bd6-4a22-ae5f-de502a100cb7/bin/ukojak/data/10ab6a750/7617c22e181a403987b514ffb4179bd6/FLAG0c102eee4 [2020-11-29 21:28:33,755 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 21:28:33,756 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_c7d71347-7bd6-4a22-ae5f-de502a100cb7/sv-benchmarks/c/loops/invert_string-2.c [2020-11-29 21:28:33,769 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c7d71347-7bd6-4a22-ae5f-de502a100cb7/bin/ukojak/data/10ab6a750/7617c22e181a403987b514ffb4179bd6/FLAG0c102eee4 [2020-11-29 21:28:34,140 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_c7d71347-7bd6-4a22-ae5f-de502a100cb7/bin/ukojak/data/10ab6a750/7617c22e181a403987b514ffb4179bd6 [2020-11-29 21:28:34,143 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 21:28:34,146 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 21:28:34,151 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 21:28:34,151 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 21:28:34,155 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 21:28:34,156 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 09:28:34" (1/1) ... [2020-11-29 21:28:34,158 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22063100 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:28:34, skipping insertion in model container [2020-11-29 21:28:34,158 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 09:28:34" (1/1) ... [2020-11-29 21:28:34,166 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 21:28:34,183 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 21:28:34,360 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 21:28:34,389 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 21:28:34,414 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 21:28:34,431 INFO L208 MainTranslator]: Completed translation [2020-11-29 21:28:34,431 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:28:34 WrapperNode [2020-11-29 21:28:34,432 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 21:28:34,433 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 21:28:34,433 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 21:28:34,433 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 21:28:34,441 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:28:34" (1/1) ... [2020-11-29 21:28:34,447 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:28:34" (1/1) ... [2020-11-29 21:28:34,467 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 21:28:34,467 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 21:28:34,468 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 21:28:34,468 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 21:28:34,476 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:28:34" (1/1) ... [2020-11-29 21:28:34,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:28:34" (1/1) ... [2020-11-29 21:28:34,479 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:28:34" (1/1) ... [2020-11-29 21:28:34,479 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:28:34" (1/1) ... [2020-11-29 21:28:34,485 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:28:34" (1/1) ... [2020-11-29 21:28:34,489 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:28:34" (1/1) ... [2020-11-29 21:28:34,490 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:28:34" (1/1) ... [2020-11-29 21:28:34,492 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 21:28:34,493 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 21:28:34,494 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 21:28:34,494 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 21:28:34,495 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:28:34" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c7d71347-7bd6-4a22-ae5f-de502a100cb7/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 [2020-11-29 21:28:34,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 21:28:34,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 21:28:34,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-29 21:28:34,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 21:28:34,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 21:28:34,552 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-29 21:28:34,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-29 21:28:35,107 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 21:28:35,107 INFO L298 CfgBuilder]: Removed 11 assume(true) statements. [2020-11-29 21:28:35,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:28:35 BoogieIcfgContainer [2020-11-29 21:28:35,109 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 21:28:35,110 INFO L113 PluginConnector]: ------------------------CodeCheck---------------------------- [2020-11-29 21:28:35,112 INFO L271 PluginConnector]: Initializing CodeCheck... [2020-11-29 21:28:35,120 INFO L275 PluginConnector]: CodeCheck initialized [2020-11-29 21:28:35,121 INFO L185 PluginConnector]: Executing the observer CodeCheckObserver from plugin CodeCheck for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:28:35" (1/1) ... [2020-11-29 21:28:35,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:28:35,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-11-29 21:28:35,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 29 states and 32 transitions. [2020-11-29 21:28:35,160 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-11-29 21:28:35,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-29 21:28:35,163 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-11-29 21:28:35,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:28:35,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:28:35,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-11-29 21:28:35,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 28 states and 31 transitions. [2020-11-29 21:28:35,435 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-11-29 21:28:35,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-29 21:28:35,436 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-11-29 21:28:35,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:28:35,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:28:35,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-11-29 21:28:35,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 30 states and 35 transitions. [2020-11-29 21:28:35,814 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-11-29 21:28:35,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-29 21:28:35,815 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-11-29 21:28:35,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:28:35,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:28:35,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-11-29 21:28:35,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 29 states and 34 transitions. [2020-11-29 21:28:35,877 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2020-11-29 21:28:35,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-29 21:28:35,878 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-11-29 21:28:35,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:28:35,898 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:28:35,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:28:35,918 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:28:35,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:28:35,965 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:28:35,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:28:35,989 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:28:36,024 WARN L483 CodeCheckObserver]: This program is UNSAFE, Check terminated with 4 iterations. [2020-11-29 21:28:36,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck CFG 29.11 09:28:36 ImpRootNode [2020-11-29 21:28:36,043 INFO L132 PluginConnector]: ------------------------ END CodeCheck---------------------------- [2020-11-29 21:28:36,044 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 21:28:36,044 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 21:28:36,044 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 21:28:36,045 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:28:35" (3/4) ... [2020-11-29 21:28:36,046 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-29 21:28:36,109 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_c7d71347-7bd6-4a22-ae5f-de502a100cb7/bin/ukojak/witness.graphml [2020-11-29 21:28:36,110 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 21:28:36,112 INFO L168 Benchmark]: Toolchain (without parser) took 1964.61 ms. Allocated memory is still 96.5 MB. Free memory was 69.4 MB in the beginning and 69.0 MB in the end (delta: 416.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 21:28:36,112 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 79.7 MB. Free memory is still 37.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 21:28:36,113 INFO L168 Benchmark]: CACSL2BoogieTranslator took 281.16 ms. Allocated memory is still 96.5 MB. Free memory was 68.9 MB in the beginning and 74.7 MB in the end (delta: -5.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 21:28:36,114 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.98 ms. Allocated memory is still 96.5 MB. Free memory was 74.1 MB in the beginning and 73.0 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 21:28:36,115 INFO L168 Benchmark]: Boogie Preprocessor took 25.20 ms. Allocated memory is still 96.5 MB. Free memory was 73.0 MB in the beginning and 71.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 21:28:36,116 INFO L168 Benchmark]: RCFGBuilder took 615.87 ms. Allocated memory is still 96.5 MB. Free memory was 71.5 MB in the beginning and 45.8 MB in the end (delta: 25.7 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. [2020-11-29 21:28:36,116 INFO L168 Benchmark]: CodeCheck took 933.04 ms. Allocated memory is still 96.5 MB. Free memory was 45.8 MB in the beginning and 70.4 MB in the end (delta: -24.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 21:28:36,120 INFO L168 Benchmark]: Witness Printer took 65.96 ms. Allocated memory is still 96.5 MB. Free memory was 70.4 MB in the beginning and 69.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 21:28:36,131 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, 29 locations, 14 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.8s, OverallIterations: 4, TraceHistogramMax: 0, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 16 SDtfs, 18 SDslu, 10 SDs, 0 SdLazy, 84 SolverSat, 32 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 67 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, traceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 92 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 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: 23]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L15] int MAX = __VERIFIER_nondet_uint(); [L16] char str1[MAX], str2[MAX]; [L17] int cont, i, j; [L18] cont = 0 [L20] i=0 [L20] COND FALSE !(i