./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_2f7c5abf-3430-4009-a968-46b028a87ec6/bin/ukojak/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_2f7c5abf-3430-4009-a968-46b028a87ec6/bin/ukojak/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_2f7c5abf-3430-4009-a968-46b028a87ec6/bin/ukojak/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_2f7c5abf-3430-4009-a968-46b028a87ec6/bin/ukojak/config/KojakMemDerefMemtrack.xml -i ../../sv-benchmarks/c/loops/invert_string-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_2f7c5abf-3430-4009-a968-46b028a87ec6/bin/ukojak/config/svcomp-DerefFreeMemtrack-32bit-Kojak_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_2f7c5abf-3430-4009-a968-46b028a87ec6/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 [2020-11-28 04:39:20,354 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 04:39:20,357 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 04:39:20,447 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 04:39:20,448 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 04:39:20,455 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 04:39:20,458 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 04:39:20,463 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 04:39:20,469 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 04:39:20,475 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 04:39:20,476 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 04:39:20,478 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 04:39:20,479 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 04:39:20,482 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 04:39:20,484 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 04:39:20,486 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 04:39:20,487 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 04:39:20,488 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 04:39:20,495 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 04:39:20,505 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 04:39:20,507 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 04:39:20,509 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 04:39:20,511 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 04:39:20,512 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 04:39:20,515 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 04:39:20,516 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 04:39:20,516 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 04:39:20,518 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 04:39:20,519 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 04:39:20,520 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 04:39:20,520 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 04:39:20,521 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 04:39:20,523 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 04:39:20,524 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 04:39:20,526 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 04:39:20,526 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 04:39:20,527 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 04:39:20,527 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 04:39:20,527 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 04:39:20,528 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 04:39:20,529 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 04:39:20,531 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_2f7c5abf-3430-4009-a968-46b028a87ec6/bin/ukojak/config/svcomp-DerefFreeMemtrack-32bit-Kojak_Default.epf [2020-11-28 04:39:20,552 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 04:39:20,552 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 04:39:20,553 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 04:39:20,554 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 04:39:20,554 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 04:39:20,554 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 04:39:20,554 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 04:39:20,554 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 04:39:20,555 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 04:39:20,555 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 04:39:20,555 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-28 04:39:20,555 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-28 04:39:20,555 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-28 04:39:20,555 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 04:39:20,556 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 04:39:20,556 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 04:39:20,556 INFO L136 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2020-11-28 04:39:20,556 INFO L138 SettingsManager]: * Timeout in seconds=1000000 [2020-11-28 04:39:20,556 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 04:39:20,557 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 04:39:20,557 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2020-11-28 04:39:20,557 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 04:39:20,557 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 04:39:20,557 INFO L138 SettingsManager]: * Trace refinement strategy=PENGUIN [2020-11-28 04:39:20,558 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 04:39:20,558 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_2f7c5abf-3430-4009-a968-46b028a87ec6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_2f7c5abf-3430-4009-a968-46b028a87ec6/bin/ukojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Kojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 87b189dc1f4e4e7b15d899fcbb97cc91a55d1376 [2020-11-28 04:39:20,805 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 04:39:20,826 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 04:39:20,829 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 04:39:20,830 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 04:39:20,831 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 04:39:20,832 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_2f7c5abf-3430-4009-a968-46b028a87ec6/bin/ukojak/../../sv-benchmarks/c/loops/invert_string-2.c [2020-11-28 04:39:20,912 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2f7c5abf-3430-4009-a968-46b028a87ec6/bin/ukojak/data/ea53e6ca2/6e05e3285e3741e0a7f65922cca09289/FLAG769576423 [2020-11-28 04:39:21,367 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 04:39:21,368 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_2f7c5abf-3430-4009-a968-46b028a87ec6/sv-benchmarks/c/loops/invert_string-2.c [2020-11-28 04:39:21,375 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2f7c5abf-3430-4009-a968-46b028a87ec6/bin/ukojak/data/ea53e6ca2/6e05e3285e3741e0a7f65922cca09289/FLAG769576423 [2020-11-28 04:39:21,759 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_2f7c5abf-3430-4009-a968-46b028a87ec6/bin/ukojak/data/ea53e6ca2/6e05e3285e3741e0a7f65922cca09289 [2020-11-28 04:39:21,761 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 04:39:21,764 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 04:39:21,768 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 04:39:21,768 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 04:39:21,772 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 04:39:21,773 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:39:21" (1/1) ... [2020-11-28 04:39:21,775 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61f8cfac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:21, skipping insertion in model container [2020-11-28 04:39:21,775 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:39:21" (1/1) ... [2020-11-28 04:39:21,782 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 04:39:21,799 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 04:39:22,036 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 04:39:22,043 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 04:39:22,063 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 04:39:22,077 INFO L208 MainTranslator]: Completed translation [2020-11-28 04:39:22,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:22 WrapperNode [2020-11-28 04:39:22,078 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 04:39:22,079 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 04:39:22,080 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 04:39:22,080 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 04:39:22,088 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:22" (1/1) ... [2020-11-28 04:39:22,095 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:22" (1/1) ... [2020-11-28 04:39:22,115 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 04:39:22,115 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 04:39:22,116 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 04:39:22,116 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 04:39:22,124 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:22" (1/1) ... [2020-11-28 04:39:22,124 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:22" (1/1) ... [2020-11-28 04:39:22,126 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:22" (1/1) ... [2020-11-28 04:39:22,127 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:22" (1/1) ... [2020-11-28 04:39:22,132 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:22" (1/1) ... [2020-11-28 04:39:22,136 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:22" (1/1) ... [2020-11-28 04:39:22,137 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:22" (1/1) ... [2020-11-28 04:39:22,139 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 04:39:22,140 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 04:39:22,141 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 04:39:22,141 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 04:39:22,142 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:39:22" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2f7c5abf-3430-4009-a968-46b028a87ec6/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 [2020-11-28 04:39:22,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 04:39:22,201 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 04:39:22,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 04:39:22,202 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 04:39:22,202 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 04:39:22,202 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 04:39:22,203 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 04:39:22,846 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 04:39:22,846 INFO L298 CfgBuilder]: Removed 11 assume(true) statements. [2020-11-28 04:39:22,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:39:22 BoogieIcfgContainer [2020-11-28 04:39:22,848 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 04:39:22,849 INFO L113 PluginConnector]: ------------------------CodeCheck---------------------------- [2020-11-28 04:39:22,849 INFO L271 PluginConnector]: Initializing CodeCheck... [2020-11-28 04:39:22,862 INFO L275 PluginConnector]: CodeCheck initialized [2020-11-28 04:39:22,863 INFO L185 PluginConnector]: Executing the observer CodeCheckObserver from plugin CodeCheck for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:39:22" (1/1) ... [2020-11-28 04:39:22,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 04:39:22,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-11-28 04:39:22,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 29 states and 32 transitions. [2020-11-28 04:39:22,905 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-11-28 04:39:22,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-28 04:39:22,907 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-11-28 04:39:23,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 04:39:23,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 04:39:23,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-11-28 04:39:23,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 28 states and 31 transitions. [2020-11-28 04:39:23,157 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-11-28 04:39:23,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-28 04:39:23,157 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-11-28 04:39:23,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 04:39:23,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 04:39:23,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-11-28 04:39:23,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 30 states and 35 transitions. [2020-11-28 04:39:23,755 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-11-28 04:39:23,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-28 04:39:23,755 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-11-28 04:39:23,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 04:39:23,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 04:39:23,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-11-28 04:39:23,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 29 states and 34 transitions. [2020-11-28 04:39:23,817 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2020-11-28 04:39:23,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-28 04:39:23,818 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-11-28 04:39:23,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 04:39:23,860 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 04:39:23,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 04:39:23,885 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 04:39:23,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 04:39:23,941 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 04:39:23,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 04:39:23,956 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 04:39:23,971 WARN L483 CodeCheckObserver]: This program is UNSAFE, Check terminated with 4 iterations. [2020-11-28 04:39:23,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck CFG 28.11 04:39:23 ImpRootNode [2020-11-28 04:39:23,998 INFO L132 PluginConnector]: ------------------------ END CodeCheck---------------------------- [2020-11-28 04:39:23,999 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 04:39:24,000 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 04:39:24,000 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 04:39:24,001 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:39:22" (3/4) ... [2020-11-28 04:39:24,003 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 04:39:24,048 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_2f7c5abf-3430-4009-a968-46b028a87ec6/bin/ukojak/witness.graphml [2020-11-28 04:39:24,048 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 04:39:24,054 INFO L168 Benchmark]: Toolchain (without parser) took 2287.05 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 65.4 MB in the beginning and 100.0 MB in the end (delta: -34.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 04:39:24,055 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 102.8 MB. Free memory is still 81.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 04:39:24,057 INFO L168 Benchmark]: CACSL2BoogieTranslator took 310.62 ms. Allocated memory is still 102.8 MB. Free memory was 65.2 MB in the beginning and 78.4 MB in the end (delta: -13.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 04:39:24,062 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.48 ms. Allocated memory is still 102.8 MB. Free memory was 78.4 MB in the beginning and 76.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 04:39:24,063 INFO L168 Benchmark]: Boogie Preprocessor took 24.15 ms. Allocated memory is still 102.8 MB. Free memory was 76.8 MB in the beginning and 75.6 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 04:39:24,064 INFO L168 Benchmark]: RCFGBuilder took 707.80 ms. Allocated memory is still 102.8 MB. Free memory was 75.6 MB in the beginning and 49.9 MB in the end (delta: 25.6 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. [2020-11-28 04:39:24,064 INFO L168 Benchmark]: CodeCheck took 1149.52 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 49.9 MB in the beginning and 101.0 MB in the end (delta: -51.1 MB). Peak memory consumption was 17.6 MB. Max. memory is 16.1 GB. [2020-11-28 04:39:24,065 INFO L168 Benchmark]: Witness Printer took 50.67 ms. Allocated memory is still 123.7 MB. Free memory was 101.0 MB in the beginning and 100.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 04:39:24,074 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: 1.0s, 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, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, traceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s 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