./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/invert_string_false-unreach-call_true-termination.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_aeb82711-8239-488a-8668-25b493a2f047/bin-2019/ukojak/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_aeb82711-8239-488a-8668-25b493a2f047/bin-2019/ukojak/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_aeb82711-8239-488a-8668-25b493a2f047/bin-2019/ukojak/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_aeb82711-8239-488a-8668-25b493a2f047/bin-2019/ukojak/config/KojakReach.xml -i ../../sv-benchmarks/c/loops/invert_string_false-unreach-call_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_aeb82711-8239-488a-8668-25b493a2f047/bin-2019/ukojak/config/svcomp-Reach-32bit-Kojak_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_aeb82711-8239-488a-8668-25b493a2f047/bin-2019/ukojak --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Kojak --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 561472dda653ab23fa8eff641224e01683fc61ba ...................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-01 14:18:12,489 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-01 14:18:12,490 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-01 14:18:12,496 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-01 14:18:12,496 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-01 14:18:12,497 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-01 14:18:12,497 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-01 14:18:12,498 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-01 14:18:12,499 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-01 14:18:12,499 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-01 14:18:12,500 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-01 14:18:12,500 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-01 14:18:12,500 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-01 14:18:12,501 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-01 14:18:12,501 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-01 14:18:12,502 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-01 14:18:12,502 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-01 14:18:12,503 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-01 14:18:12,504 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-01 14:18:12,505 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-01 14:18:12,505 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-01 14:18:12,506 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-01 14:18:12,507 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-01 14:18:12,507 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-01 14:18:12,508 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-01 14:18:12,508 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-01 14:18:12,509 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-01 14:18:12,509 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-01 14:18:12,509 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-01 14:18:12,510 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-01 14:18:12,510 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-01 14:18:12,510 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-01 14:18:12,510 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-01 14:18:12,511 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-01 14:18:12,511 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-01 14:18:12,511 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-01 14:18:12,512 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_aeb82711-8239-488a-8668-25b493a2f047/bin-2019/ukojak/config/svcomp-Reach-32bit-Kojak_Default.epf [2018-12-01 14:18:12,519 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-01 14:18:12,519 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-01 14:18:12,520 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-01 14:18:12,520 INFO L133 SettingsManager]: * ... to procedures called more than once=ALWAYS [2018-12-01 14:18:12,520 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-01 14:18:12,520 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-01 14:18:12,520 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-01 14:18:12,520 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-01 14:18:12,521 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-01 14:18:12,521 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-01 14:18:12,521 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-01 14:18:12,521 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-01 14:18:12,521 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-01 14:18:12,521 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-01 14:18:12,521 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-01 14:18:12,521 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-01 14:18:12,521 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-01 14:18:12,521 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-01 14:18:12,522 INFO L131 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2018-12-01 14:18:12,522 INFO L133 SettingsManager]: * Timeout in seconds=1000000 [2018-12-01 14:18:12,522 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-01 14:18:12,522 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-01 14:18:12,522 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2018-12-01 14:18:12,522 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-01 14:18:12,522 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-01 14:18:12,522 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-01 14:18:12,522 INFO L133 SettingsManager]: * Trace refinement strategy=PENGUIN [2018-12-01 14:18:12,522 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-01 14:18:12,523 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-01 14:18:12,523 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true 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/working_dir_aeb82711-8239-488a-8668-25b493a2f047/bin-2019/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 ! call(__VERIFIER_error())) ) 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 -> 561472dda653ab23fa8eff641224e01683fc61ba [2018-12-01 14:18:12,540 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-01 14:18:12,547 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-01 14:18:12,549 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-01 14:18:12,550 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-01 14:18:12,550 INFO L276 PluginConnector]: CDTParser initialized [2018-12-01 14:18:12,550 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_aeb82711-8239-488a-8668-25b493a2f047/bin-2019/ukojak/../../sv-benchmarks/c/loops/invert_string_false-unreach-call_true-termination.i [2018-12-01 14:18:12,589 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_aeb82711-8239-488a-8668-25b493a2f047/bin-2019/ukojak/data/afc989fe8/453a532c426b46d4b7adc832a457abaf/FLAG06ee019fa [2018-12-01 14:18:13,009 INFO L307 CDTParser]: Found 1 translation units. [2018-12-01 14:18:13,010 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_aeb82711-8239-488a-8668-25b493a2f047/sv-benchmarks/c/loops/invert_string_false-unreach-call_true-termination.i [2018-12-01 14:18:13,013 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_aeb82711-8239-488a-8668-25b493a2f047/bin-2019/ukojak/data/afc989fe8/453a532c426b46d4b7adc832a457abaf/FLAG06ee019fa [2018-12-01 14:18:13,021 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_aeb82711-8239-488a-8668-25b493a2f047/bin-2019/ukojak/data/afc989fe8/453a532c426b46d4b7adc832a457abaf [2018-12-01 14:18:13,022 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-01 14:18:13,023 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-01 14:18:13,024 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-01 14:18:13,024 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-01 14:18:13,026 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-01 14:18:13,026 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 02:18:13" (1/1) ... [2018-12-01 14:18:13,028 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fdfc843 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:18:13, skipping insertion in model container [2018-12-01 14:18:13,028 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 02:18:13" (1/1) ... [2018-12-01 14:18:13,033 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-01 14:18:13,046 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-01 14:18:13,141 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-01 14:18:13,143 INFO L191 MainTranslator]: Completed pre-run [2018-12-01 14:18:13,156 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-01 14:18:13,167 INFO L195 MainTranslator]: Completed translation [2018-12-01 14:18:13,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:18:13 WrapperNode [2018-12-01 14:18:13,167 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-01 14:18:13,167 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-01 14:18:13,167 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-01 14:18:13,168 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-01 14:18:13,174 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:18:13" (1/1) ... [2018-12-01 14:18:13,181 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:18:13" (1/1) ... [2018-12-01 14:18:13,194 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-01 14:18:13,194 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-01 14:18:13,194 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-01 14:18:13,194 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-01 14:18:13,228 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:18:13" (1/1) ... [2018-12-01 14:18:13,228 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:18:13" (1/1) ... [2018-12-01 14:18:13,229 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:18:13" (1/1) ... [2018-12-01 14:18:13,229 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:18:13" (1/1) ... [2018-12-01 14:18:13,234 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:18:13" (1/1) ... [2018-12-01 14:18:13,238 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:18:13" (1/1) ... [2018-12-01 14:18:13,239 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:18:13" (1/1) ... [2018-12-01 14:18:13,240 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-01 14:18:13,241 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-01 14:18:13,241 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-01 14:18:13,241 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-01 14:18:13,242 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:18:13" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_aeb82711-8239-488a-8668-25b493a2f047/bin-2019/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 [2018-12-01 14:18:13,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-12-01 14:18:13,276 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-01 14:18:13,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-01 14:18:13,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-01 14:18:13,276 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-12-01 14:18:13,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-01 14:18:13,447 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-01 14:18:13,447 INFO L280 CfgBuilder]: Removed 9 assue(true) statements. [2018-12-01 14:18:13,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 02:18:13 BoogieIcfgContainer [2018-12-01 14:18:13,447 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-01 14:18:13,447 INFO L113 PluginConnector]: ------------------------CodeCheck---------------------------- [2018-12-01 14:18:13,448 INFO L271 PluginConnector]: Initializing CodeCheck... [2018-12-01 14:18:13,454 INFO L276 PluginConnector]: CodeCheck initialized [2018-12-01 14:18:13,455 INFO L185 PluginConnector]: Executing the observer CodeCheckObserver from plugin CodeCheck for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 02:18:13" (1/1) ... [2018-12-01 14:18:13,461 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 14:18:13,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2018-12-01 14:18:13,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 9 states and 12 transitions. [2018-12-01 14:18:13,485 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 12 transitions. [2018-12-01 14:18:13,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-12-01 14:18:13,487 INFO L431 CodeCheckObserver]: Error Path is FOUND. [2018-12-01 14:18:13,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 14:18:13,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 14:18:13,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2018-12-01 14:18:13,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 10 states and 12 transitions. [2018-12-01 14:18:13,620 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2018-12-01 14:18:13,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-01 14:18:13,620 INFO L431 CodeCheckObserver]: Error Path is FOUND. [2018-12-01 14:18:13,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 14:18:13,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-01 14:18:13,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2018-12-01 14:18:13,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 11 states and 14 transitions. [2018-12-01 14:18:13,694 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2018-12-01 14:18:13,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-12-01 14:18:13,694 INFO L431 CodeCheckObserver]: Error Path is FOUND. [2018-12-01 14:18:13,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 14:18:13,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-01 14:18:14,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2018-12-01 14:18:14,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 15 states and 24 transitions. [2018-12-01 14:18:14,239 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 24 transitions. [2018-12-01 14:18:14,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-12-01 14:18:14,242 INFO L431 CodeCheckObserver]: Error Path is FOUND. [2018-12-01 14:18:14,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 14:18:14,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 14:18:14,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2018-12-01 14:18:14,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 17 states and 29 transitions. [2018-12-01 14:18:14,532 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 29 transitions. [2018-12-01 14:18:14,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-01 14:18:14,532 INFO L431 CodeCheckObserver]: Error Path is FOUND. [2018-12-01 14:18:14,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 14:18:14,784 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-01 14:18:15,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2018-12-01 14:18:15,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 21 states and 39 transitions. [2018-12-01 14:18:15,507 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 39 transitions. [2018-12-01 14:18:15,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-12-01 14:18:15,508 INFO L431 CodeCheckObserver]: Error Path is FOUND. [2018-12-01 14:18:15,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 14:18:15,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-01 14:18:16,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2018-12-01 14:18:16,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 25 states and 47 transitions. [2018-12-01 14:18:16,255 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 47 transitions. [2018-12-01 14:18:16,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-12-01 14:18:16,255 INFO L431 CodeCheckObserver]: Error Path is FOUND. [2018-12-01 14:18:16,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 14:18:16,329 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 14:18:16,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2018-12-01 14:18:16,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 28 states and 53 transitions. [2018-12-01 14:18:16,859 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 53 transitions. [2018-12-01 14:18:16,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-12-01 14:18:16,860 INFO L431 CodeCheckObserver]: Error Path is FOUND. [2018-12-01 14:18:16,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 14:18:17,421 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-12-01 14:18:18,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2018-12-01 14:18:18,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 31 states and 61 transitions. [2018-12-01 14:18:18,973 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 61 transitions. [2018-12-01 14:18:18,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-01 14:18:18,973 INFO L431 CodeCheckObserver]: Error Path is FOUND. [2018-12-01 14:18:18,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 14:18:18,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 14:18:19,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 14:18:19,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 14:18:19,029 WARN L497 CodeCheckObserver]: This program is UNSAFE, Check terminated with 9 iterations. [2018-12-01 14:18:19,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck CFG 01.12 02:18:19 ImpRootNode [2018-12-01 14:18:19,047 INFO L132 PluginConnector]: ------------------------ END CodeCheck---------------------------- [2018-12-01 14:18:19,048 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-01 14:18:19,048 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-01 14:18:19,048 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-01 14:18:19,048 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 02:18:13" (3/4) ... [2018-12-01 14:18:19,050 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-12-01 14:18:19,084 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_aeb82711-8239-488a-8668-25b493a2f047/bin-2019/ukojak/witness.graphml [2018-12-01 14:18:19,084 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-01 14:18:19,085 INFO L168 Benchmark]: Toolchain (without parser) took 6062.02 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 283.6 MB). Free memory was 962.4 MB in the beginning and 892.1 MB in the end (delta: 70.3 MB). Peak memory consumption was 353.9 MB. Max. memory is 11.5 GB. [2018-12-01 14:18:19,086 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 982.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 14:18:19,086 INFO L168 Benchmark]: CACSL2BoogieTranslator took 143.35 ms. Allocated memory is still 1.0 GB. Free memory was 962.4 MB in the beginning and 951.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-01 14:18:19,087 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.84 ms. Allocated memory is still 1.0 GB. Free memory was 951.7 MB in the beginning and 946.3 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-12-01 14:18:19,087 INFO L168 Benchmark]: Boogie Preprocessor took 46.09 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 103.3 MB). Free memory was 946.3 MB in the beginning and 1.1 GB in the end (delta: -151.6 MB). Peak memory consumption was 13.4 MB. Max. memory is 11.5 GB. [2018-12-01 14:18:19,088 INFO L168 Benchmark]: RCFGBuilder took 206.52 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.9 MB). Peak memory consumption was 21.9 MB. Max. memory is 11.5 GB. [2018-12-01 14:18:19,088 INFO L168 Benchmark]: CodeCheck took 5600.09 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 180.4 MB). Free memory was 1.1 GB in the beginning and 892.1 MB in the end (delta: 184.0 MB). Peak memory consumption was 364.3 MB. Max. memory is 11.5 GB. [2018-12-01 14:18:19,089 INFO L168 Benchmark]: Witness Printer took 36.54 ms. Allocated memory is still 1.3 GB. Free memory is still 892.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 14:18:19,092 INFO L336 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, 18 locations, 1 error locations. UNSAFE Result, 5.5s OverallTime, 9 OverallIterations, 0 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 768 SDtfs, 368 SDslu, 0 SDs, 0 SdLazy, 5860 SolverSat, 2688 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 749 GetRequests, 603 SyntacticMatches, 16 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8166 ImplicationChecksByTransitivity, 4.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, traceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 87 NumberOfCodeBlocks, 87 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 66 ConstructedInterpolants, 0 QuantifiedInterpolants, 5031 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 19/38 InterpolantCoveringCapability, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int MAX = __VERIFIER_nondet_uint(); [L16] char str1[MAX], str2[MAX]; [L17] int cont, i, j; [L18] cont = 0 [L20] i=0 [L20] COND TRUE i= 0 [L28] EXPR str1[0] [L28] str2[j] = str1[0] [L29] j++ [L27] i-- [L27] COND TRUE i >= 0 [L28] EXPR str1[0] [L28] str2[j] = str1[0] [L29] j++ [L27] i-- [L27] COND FALSE !(i >= 0) [L32] j = MAX-1 [L33] i=0 [L33] COND TRUE i