./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/invert_string-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fe01620-76c5-485c-9ad0-252909790bee/bin/ukojak-2xVlg8857e/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fe01620-76c5-485c-9ad0-252909790bee/bin/ukojak-2xVlg8857e/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fe01620-76c5-485c-9ad0-252909790bee/bin/ukojak-2xVlg8857e/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fe01620-76c5-485c-9ad0-252909790bee/bin/ukojak-2xVlg8857e/config/KojakReach.xml -i ../../sv-benchmarks/c/loops/invert_string-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fe01620-76c5-485c-9ad0-252909790bee/bin/ukojak-2xVlg8857e/config/svcomp-Reach-32bit-Kojak_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fe01620-76c5-485c-9ad0-252909790bee/bin/ukojak-2xVlg8857e --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Kojak --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b3da85103e65fd13a584e838d8b961878044a0a70e09ad1788e3ca53a404f357 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 22:59:59,300 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 22:59:59,304 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 22:59:59,373 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 22:59:59,374 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 22:59:59,377 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 22:59:59,379 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 22:59:59,383 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 22:59:59,386 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 22:59:59,391 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 22:59:59,392 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 22:59:59,394 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 22:59:59,395 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 22:59:59,397 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 22:59:59,399 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 22:59:59,411 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 22:59:59,412 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 22:59:59,414 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 22:59:59,416 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 22:59:59,426 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 22:59:59,427 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 22:59:59,429 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 22:59:59,432 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 22:59:59,433 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 22:59:59,443 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 22:59:59,443 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 22:59:59,443 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 22:59:59,446 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 22:59:59,446 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 22:59:59,448 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 22:59:59,448 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 22:59:59,449 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 22:59:59,451 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 22:59:59,452 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 22:59:59,454 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 22:59:59,454 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 22:59:59,455 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 22:59:59,455 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 22:59:59,455 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 22:59:59,456 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 22:59:59,457 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 22:59:59,458 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fe01620-76c5-485c-9ad0-252909790bee/bin/ukojak-2xVlg8857e/config/svcomp-Reach-32bit-Kojak_Default.epf [2021-11-13 22:59:59,504 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 22:59:59,505 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 22:59:59,506 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 22:59:59,506 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ALWAYS [2021-11-13 22:59:59,507 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 22:59:59,507 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 22:59:59,508 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 22:59:59,508 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 22:59:59,508 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 22:59:59,508 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 22:59:59,509 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 22:59:59,510 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 22:59:59,510 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 22:59:59,510 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 22:59:59,510 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 22:59:59,510 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 22:59:59,510 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 22:59:59,511 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 22:59:59,511 INFO L136 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2021-11-13 22:59:59,511 INFO L138 SettingsManager]: * Timeout in seconds=1000000 [2021-11-13 22:59:59,511 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 22:59:59,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2021-11-13 22:59:59,512 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 22:59:59,512 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 22:59:59,512 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 22:59:59,512 INFO L138 SettingsManager]: * Trace refinement strategy=PENGUIN [2021-11-13 22:59:59,512 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 22:59:59,513 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 22:59:59,513 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_worker_vcloud-master_on_vcloud-master/run_dir_2fe01620-76c5-485c-9ad0-252909790bee/bin/ukojak-2xVlg8857e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fe01620-76c5-485c-9ad0-252909790bee/bin/ukojak-2xVlg8857e Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Kojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b3da85103e65fd13a584e838d8b961878044a0a70e09ad1788e3ca53a404f357 [2021-11-13 22:59:59,825 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 22:59:59,852 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 22:59:59,854 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 22:59:59,856 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 22:59:59,857 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 22:59:59,859 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fe01620-76c5-485c-9ad0-252909790bee/bin/ukojak-2xVlg8857e/../../sv-benchmarks/c/loops/invert_string-1.c [2021-11-13 22:59:59,943 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fe01620-76c5-485c-9ad0-252909790bee/bin/ukojak-2xVlg8857e/data/6ebc3d5e7/fce8438d11dd4e369b715ff8feea8d59/FLAG6fe30f71d [2021-11-13 23:00:00,524 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 23:00:00,525 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fe01620-76c5-485c-9ad0-252909790bee/sv-benchmarks/c/loops/invert_string-1.c [2021-11-13 23:00:00,539 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fe01620-76c5-485c-9ad0-252909790bee/bin/ukojak-2xVlg8857e/data/6ebc3d5e7/fce8438d11dd4e369b715ff8feea8d59/FLAG6fe30f71d [2021-11-13 23:00:00,884 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fe01620-76c5-485c-9ad0-252909790bee/bin/ukojak-2xVlg8857e/data/6ebc3d5e7/fce8438d11dd4e369b715ff8feea8d59 [2021-11-13 23:00:00,889 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 23:00:00,891 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 23:00:00,893 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 23:00:00,893 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 23:00:00,897 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 23:00:00,898 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 11:00:00" (1/1) ... [2021-11-13 23:00:00,900 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19caea67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:00:00, skipping insertion in model container [2021-11-13 23:00:00,900 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 11:00:00" (1/1) ... [2021-11-13 23:00:00,909 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 23:00:00,924 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 23:00:01,064 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fe01620-76c5-485c-9ad0-252909790bee/sv-benchmarks/c/loops/invert_string-1.c[352,365] [2021-11-13 23:00:01,086 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 23:00:01,095 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 23:00:01,111 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fe01620-76c5-485c-9ad0-252909790bee/sv-benchmarks/c/loops/invert_string-1.c[352,365] [2021-11-13 23:00:01,136 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 23:00:01,154 INFO L208 MainTranslator]: Completed translation [2021-11-13 23:00:01,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:00:01 WrapperNode [2021-11-13 23:00:01,155 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 23:00:01,157 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 23:00:01,157 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 23:00:01,159 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 23:00:01,167 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:00:01" (1/1) ... [2021-11-13 23:00:01,176 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:00:01" (1/1) ... [2021-11-13 23:00:01,204 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 23:00:01,205 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 23:00:01,205 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 23:00:01,205 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 23:00:01,214 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:00:01" (1/1) ... [2021-11-13 23:00:01,214 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:00:01" (1/1) ... [2021-11-13 23:00:01,225 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:00:01" (1/1) ... [2021-11-13 23:00:01,226 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:00:01" (1/1) ... [2021-11-13 23:00:01,238 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:00:01" (1/1) ... [2021-11-13 23:00:01,247 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:00:01" (1/1) ... [2021-11-13 23:00:01,249 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:00:01" (1/1) ... [2021-11-13 23:00:01,252 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 23:00:01,257 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 23:00:01,258 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 23:00:01,258 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 23:00:01,259 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:00:01" (1/1) ... [2021-11-13 23:00:01,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2021-11-13 23:00:01,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fe01620-76c5-485c-9ad0-252909790bee/bin/ukojak-2xVlg8857e/z3 [2021-11-13 23:00:01,293 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fe01620-76c5-485c-9ad0-252909790bee/bin/ukojak-2xVlg8857e/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (exit command is (exit), workingDir is null) [2021-11-13 23:00:01,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fe01620-76c5-485c-9ad0-252909790bee/bin/ukojak-2xVlg8857e/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (1)] Waiting until timeout for monitored process [2021-11-13 23:00:01,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 23:00:01,354 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 23:00:01,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-13 23:00:01,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 23:00:01,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 23:00:01,355 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-13 23:00:01,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 23:00:01,711 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 23:00:01,711 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-13 23:00:01,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 11:00:01 BoogieIcfgContainer [2021-11-13 23:00:01,714 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 23:00:01,714 INFO L113 PluginConnector]: ------------------------CodeCheck---------------------------- [2021-11-13 23:00:01,715 INFO L271 PluginConnector]: Initializing CodeCheck... [2021-11-13 23:00:01,737 INFO L275 PluginConnector]: CodeCheck initialized [2021-11-13 23:00:01,738 INFO L185 PluginConnector]: Executing the observer CodeCheckObserver from plugin CodeCheck for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 11:00:01" (1/1) ... [2021-11-13 23:00:01,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 23:00:01,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2021-11-13 23:00:01,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 9 states and 12 transitions. [2021-11-13 23:00:01,808 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 12 transitions. [2021-11-13 23:00:01,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-13 23:00:01,810 INFO L422 CodeCheckObserver]: Error Path is FOUND. [2021-11-13 23:00:01,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 23:00:01,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 23:00:02,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 23:00:02,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2021-11-13 23:00:02,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 10 states and 13 transitions. [2021-11-13 23:00:02,127 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2021-11-13 23:00:02,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-13 23:00:02,128 INFO L422 CodeCheckObserver]: Error Path is FOUND. [2021-11-13 23:00:02,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 23:00:02,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 23:00:02,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 23:00:02,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2021-11-13 23:00:02,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 11 states and 14 transitions. [2021-11-13 23:00:02,360 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2021-11-13 23:00:02,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-13 23:00:02,360 INFO L422 CodeCheckObserver]: Error Path is FOUND. [2021-11-13 23:00:02,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 23:00:02,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 23:00:02,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 23:00:03,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2021-11-13 23:00:03,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 17 states and 29 transitions. [2021-11-13 23:00:03,485 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 29 transitions. [2021-11-13 23:00:03,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-13 23:00:03,487 INFO L422 CodeCheckObserver]: Error Path is FOUND. [2021-11-13 23:00:03,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 23:00:03,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 23:00:03,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 23:00:04,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2021-11-13 23:00:04,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 19 states and 33 transitions. [2021-11-13 23:00:04,270 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 33 transitions. [2021-11-13 23:00:04,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-13 23:00:04,271 INFO L422 CodeCheckObserver]: Error Path is FOUND. [2021-11-13 23:00:04,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 23:00:04,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 23:00:04,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 23:00:04,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2021-11-13 23:00:04,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 20 states and 34 transitions. [2021-11-13 23:00:04,638 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 34 transitions. [2021-11-13 23:00:04,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-13 23:00:04,639 INFO L422 CodeCheckObserver]: Error Path is FOUND. [2021-11-13 23:00:04,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 23:00:04,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 23:00:05,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 23:00:06,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2021-11-13 23:00:06,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 25 states and 48 transitions. [2021-11-13 23:00:06,425 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 48 transitions. [2021-11-13 23:00:06,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-13 23:00:06,425 INFO L422 CodeCheckObserver]: Error Path is FOUND. [2021-11-13 23:00:06,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 23:00:06,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 23:00:06,559 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 23:00:07,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2021-11-13 23:00:07,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 27 states and 55 transitions. [2021-11-13 23:00:07,079 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 55 transitions. [2021-11-13 23:00:07,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-13 23:00:07,079 INFO L422 CodeCheckObserver]: Error Path is FOUND. [2021-11-13 23:00:07,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 23:00:07,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 23:00:07,222 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 23:00:07,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2021-11-13 23:00:07,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 29 states and 58 transitions. [2021-11-13 23:00:07,678 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 58 transitions. [2021-11-13 23:00:07,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-13 23:00:07,679 INFO L422 CodeCheckObserver]: Error Path is FOUND. [2021-11-13 23:00:07,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 23:00:07,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 23:00:07,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 23:00:08,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2021-11-13 23:00:08,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 33 states and 66 transitions. [2021-11-13 23:00:08,648 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 66 transitions. [2021-11-13 23:00:08,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-13 23:00:08,649 INFO L422 CodeCheckObserver]: Error Path is FOUND. [2021-11-13 23:00:08,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 23:00:08,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 23:00:08,885 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 23:00:09,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2021-11-13 23:00:09,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 30 states and 54 transitions. [2021-11-13 23:00:09,253 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 54 transitions. [2021-11-13 23:00:09,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-13 23:00:09,254 INFO L422 CodeCheckObserver]: Error Path is FOUND. [2021-11-13 23:00:09,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 23:00:09,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 23:00:10,108 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 23:00:11,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2021-11-13 23:00:11,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 32 states and 59 transitions. [2021-11-13 23:00:11,433 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 59 transitions. [2021-11-13 23:00:11,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-13 23:00:11,434 INFO L422 CodeCheckObserver]: Error Path is FOUND. [2021-11-13 23:00:11,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 23:00:11,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 23:00:11,673 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 23:00:12,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2021-11-13 23:00:12,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 33 states and 60 transitions. [2021-11-13 23:00:12,060 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 60 transitions. [2021-11-13 23:00:12,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-13 23:00:12,061 INFO L422 CodeCheckObserver]: Error Path is FOUND. [2021-11-13 23:00:12,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 23:00:12,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 23:00:12,300 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 23:00:13,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2021-11-13 23:00:13,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 34 states and 64 transitions. [2021-11-13 23:00:13,039 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 64 transitions. [2021-11-13 23:00:13,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-13 23:00:13,040 INFO L422 CodeCheckObserver]: Error Path is FOUND. [2021-11-13 23:00:13,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 23:00:13,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 23:00:13,160 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 23:00:13,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2021-11-13 23:00:13,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 35 states and 65 transitions. [2021-11-13 23:00:13,476 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 65 transitions. [2021-11-13 23:00:13,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-13 23:00:13,476 INFO L422 CodeCheckObserver]: Error Path is FOUND. [2021-11-13 23:00:13,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 23:00:13,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 23:00:13,642 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 23:00:13,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2021-11-13 23:00:13,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 36 states and 65 transitions. [2021-11-13 23:00:13,855 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 65 transitions. [2021-11-13 23:00:13,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-13 23:00:13,855 INFO L422 CodeCheckObserver]: Error Path is FOUND. [2021-11-13 23:00:13,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 23:00:13,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 23:00:13,872 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-13 23:00:13,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 23:00:13,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 23:00:13,935 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-13 23:00:13,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 23:00:14,018 WARN L475 CodeCheckObserver]: This program is UNSAFE, Check terminated with 16 iterations. [2021-11-13 23:00:14,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck CFG 13.11 11:00:14 ImpRootNode [2021-11-13 23:00:14,096 INFO L132 PluginConnector]: ------------------------ END CodeCheck---------------------------- [2021-11-13 23:00:14,096 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-13 23:00:14,096 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-13 23:00:14,097 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-13 23:00:14,097 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 11:00:01" (3/4) ... [2021-11-13 23:00:14,099 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-13 23:00:14,184 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fe01620-76c5-485c-9ad0-252909790bee/bin/ukojak-2xVlg8857e/witness.graphml [2021-11-13 23:00:14,185 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-13 23:00:14,186 INFO L158 Benchmark]: Toolchain (without parser) took 13294.59ms. Allocated memory was 109.1MB in the beginning and 163.6MB in the end (delta: 54.5MB). Free memory was 80.6MB in the beginning and 66.0MB in the end (delta: 14.6MB). Peak memory consumption was 70.6MB. Max. memory is 16.1GB. [2021-11-13 23:00:14,187 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 86.0MB. Free memory was 52.6MB in the beginning and 52.6MB in the end (delta: 42.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 23:00:14,188 INFO L158 Benchmark]: CACSL2BoogieTranslator took 263.29ms. Allocated memory is still 109.1MB. Free memory was 80.2MB in the beginning and 70.5MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-13 23:00:14,189 INFO L158 Benchmark]: Boogie Procedure Inliner took 47.10ms. Allocated memory is still 109.1MB. Free memory was 70.3MB in the beginning and 68.8MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 23:00:14,190 INFO L158 Benchmark]: Boogie Preprocessor took 51.74ms. Allocated memory is still 109.1MB. Free memory was 68.8MB in the beginning and 67.7MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-13 23:00:14,190 INFO L158 Benchmark]: RCFGBuilder took 456.50ms. Allocated memory is still 109.1MB. Free memory was 67.7MB in the beginning and 54.7MB in the end (delta: 12.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-13 23:00:14,192 INFO L158 Benchmark]: CodeCheck took 12381.41ms. Allocated memory was 109.1MB in the beginning and 163.6MB in the end (delta: 54.5MB). Free memory was 54.5MB in the beginning and 69.1MB in the end (delta: -14.6MB). Peak memory consumption was 41.2MB. Max. memory is 16.1GB. [2021-11-13 23:00:14,192 INFO L158 Benchmark]: Witness Printer took 88.56ms. Allocated memory is still 163.6MB. Free memory was 69.1MB in the beginning and 66.0MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-13 23:00:14,197 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, 9 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 12.3s, OverallIterations: 16, TraceHistogramMax: 0, PathProgramHistogramMax: 0, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 337 SdHoareTripleChecker+Valid, 5223.47ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 69 mSDsluCounter, 60 SdHoareTripleChecker+Invalid, 4246.27ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 1209 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2406 IncrementalHoareTripleChecker+Invalid, 3615 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1209 mSolverCounterUnsat, 60 mSDtfsCounter, 2406 mSolverCounterSat, 93.98ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1600 GetRequests, 1343 SyntacticMatches, 79 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18796 ImplicationChecksByTransitivity, 9.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, InterpolantAutomatonStates: 0, traceCheckStatistics: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.4s InterpolantComputationTime, 170 NumberOfCodeBlocks, 170 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 142 ConstructedInterpolants, 0 QuantifiedInterpolants, 918 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 15 InterpolantComputations, 2 PerfectInterpolantSequences, 35/127 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: 8]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L16] int MAX = __VERIFIER_nondet_uint(); [L17] COND FALSE !(!(MAX > 0)) [L18] char str1[MAX], str2[MAX]; [L19] int cont, i, j; [L20] cont = 0 [L22] i=0 VAL [cont=0, i=0, MAX=2, str1={12788:0}, str2={12784:0}] [L22] COND TRUE i= 0 [L30] EXPR str1[0] [L30] str2[j] = str1[0] [L31] j++ [L29] i-- VAL [cont=0, i=0, j=1, MAX=2, str1={12788:0}, str2={12784:0}] [L29] COND TRUE i >= 0 [L30] EXPR str1[0] [L30] str2[j] = str1[0] [L31] j++ [L29] i-- VAL [cont=0, i=-1, j=2, MAX=2, str1={12788:0}, str2={12784:0}] [L29] COND FALSE !(i >= 0) [L34] j = MAX-1 [L35] i=0 VAL [cont=0, i=0, j=1, MAX=2, str1={12788:0}, str2={12784:0}] [L35] COND TRUE i