./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 cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20452520-a0e7-415b-86ad-93556477087b/bin/ukojak-verify-0OAaufAVZV/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20452520-a0e7-415b-86ad-93556477087b/bin/ukojak-verify-0OAaufAVZV/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20452520-a0e7-415b-86ad-93556477087b/bin/ukojak-verify-0OAaufAVZV/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20452520-a0e7-415b-86ad-93556477087b/bin/ukojak-verify-0OAaufAVZV/config/KojakReach.xml -i ../../sv-benchmarks/c/loops/invert_string-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20452520-a0e7-415b-86ad-93556477087b/bin/ukojak-verify-0OAaufAVZV/config/svcomp-Reach-32bit-Kojak_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20452520-a0e7-415b-86ad-93556477087b/bin/ukojak-verify-0OAaufAVZV --witnessprinter.witness.filename witness --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 0.2.3-dev-cf1a783 [2023-11-11 23:58:05,692 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-11 23:58:05,763 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20452520-a0e7-415b-86ad-93556477087b/bin/ukojak-verify-0OAaufAVZV/config/svcomp-Reach-32bit-Kojak_Default.epf [2023-11-11 23:58:05,771 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-11 23:58:05,772 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck.Interpolating solver [2023-11-11 23:58:05,809 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-11 23:58:05,811 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-11 23:58:05,812 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ALWAYS [2023-11-11 23:58:05,814 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-11 23:58:05,819 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-11 23:58:05,819 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-11 23:58:05,820 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-11 23:58:05,820 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-11 23:58:05,822 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-11 23:58:05,823 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-11 23:58:05,823 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-11 23:58:05,824 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-11 23:58:05,824 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-11 23:58:05,824 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-11 23:58:05,825 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-11 23:58:05,825 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-11 23:58:05,826 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-11 23:58:05,828 INFO L151 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2023-11-11 23:58:05,828 INFO L153 SettingsManager]: * Timeout in seconds=1000000 [2023-11-11 23:58:05,829 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-11 23:58:05,830 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2023-11-11 23:58:05,830 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-11 23:58:05,831 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-11 23:58:05,832 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-11 23:58:05,832 INFO L153 SettingsManager]: * Trace refinement strategy=PENGUIN [2023-11-11 23:58:05,834 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-11 23:58:05,834 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-11 23:58:05,834 INFO L153 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_20452520-a0e7-415b-86ad-93556477087b/bin/ukojak-verify-0OAaufAVZV/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20452520-a0e7-415b-86ad-93556477087b/bin/ukojak-verify-0OAaufAVZV Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Kojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b3da85103e65fd13a584e838d8b961878044a0a70e09ad1788e3ca53a404f357 [2023-11-11 23:58:06,153 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-11 23:58:06,190 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-11 23:58:06,193 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-11 23:58:06,194 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-11 23:58:06,194 INFO L274 PluginConnector]: CDTParser initialized [2023-11-11 23:58:06,196 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20452520-a0e7-415b-86ad-93556477087b/bin/ukojak-verify-0OAaufAVZV/../../sv-benchmarks/c/loops/invert_string-1.c [2023-11-11 23:58:09,345 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-11 23:58:09,568 INFO L384 CDTParser]: Found 1 translation units. [2023-11-11 23:58:09,568 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20452520-a0e7-415b-86ad-93556477087b/sv-benchmarks/c/loops/invert_string-1.c [2023-11-11 23:58:09,576 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20452520-a0e7-415b-86ad-93556477087b/bin/ukojak-verify-0OAaufAVZV/data/48d74765c/d619ce1cfbbd4a8daf6d58d83587ce3d/FLAG938edfcb9 [2023-11-11 23:58:09,592 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20452520-a0e7-415b-86ad-93556477087b/bin/ukojak-verify-0OAaufAVZV/data/48d74765c/d619ce1cfbbd4a8daf6d58d83587ce3d [2023-11-11 23:58:09,595 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-11 23:58:09,596 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-11 23:58:09,598 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-11 23:58:09,598 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-11 23:58:09,603 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-11 23:58:09,604 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 11:58:09" (1/1) ... [2023-11-11 23:58:09,605 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dfd4adb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 11:58:09, skipping insertion in model container [2023-11-11 23:58:09,605 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 11:58:09" (1/1) ... [2023-11-11 23:58:09,627 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-11 23:58:09,776 WARN L240 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_20452520-a0e7-415b-86ad-93556477087b/sv-benchmarks/c/loops/invert_string-1.c[352,365] [2023-11-11 23:58:09,799 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-11 23:58:09,808 INFO L202 MainTranslator]: Completed pre-run [2023-11-11 23:58:09,821 WARN L240 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_20452520-a0e7-415b-86ad-93556477087b/sv-benchmarks/c/loops/invert_string-1.c[352,365] [2023-11-11 23:58:09,829 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-11 23:58:09,845 INFO L206 MainTranslator]: Completed translation [2023-11-11 23:58:09,845 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 11:58:09 WrapperNode [2023-11-11 23:58:09,846 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-11 23:58:09,847 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-11 23:58:09,847 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-11 23:58:09,847 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-11 23:58:09,855 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 11:58:09" (1/1) ... [2023-11-11 23:58:09,863 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 11:58:09" (1/1) ... [2023-11-11 23:58:09,883 INFO L138 Inliner]: procedures = 15, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 75 [2023-11-11 23:58:09,884 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-11 23:58:09,884 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-11 23:58:09,885 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-11 23:58:09,885 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-11 23:58:09,894 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 11:58:09" (1/1) ... [2023-11-11 23:58:09,894 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 11:58:09" (1/1) ... [2023-11-11 23:58:09,896 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 11:58:09" (1/1) ... [2023-11-11 23:58:09,897 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 11:58:09" (1/1) ... [2023-11-11 23:58:09,902 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 11:58:09" (1/1) ... [2023-11-11 23:58:09,906 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 11:58:09" (1/1) ... [2023-11-11 23:58:09,907 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 11:58:09" (1/1) ... [2023-11-11 23:58:09,909 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 11:58:09" (1/1) ... [2023-11-11 23:58:09,911 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-11 23:58:09,917 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-11 23:58:09,918 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-11 23:58:09,918 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-11 23:58:09,919 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 11:58:09" (1/1) ... [2023-11-11 23:58:09,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2023-11-11 23:58:09,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20452520-a0e7-415b-86ad-93556477087b/bin/ukojak-verify-0OAaufAVZV/z3 [2023-11-11 23:58:09,957 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20452520-a0e7-415b-86ad-93556477087b/bin/ukojak-verify-0OAaufAVZV/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (exit command is (exit), workingDir is null) [2023-11-11 23:58:09,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20452520-a0e7-415b-86ad-93556477087b/bin/ukojak-verify-0OAaufAVZV/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (1)] Waiting until timeout for monitored process [2023-11-11 23:58:10,007 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-11 23:58:10,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-11 23:58:10,008 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-11 23:58:10,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-11 23:58:10,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-11 23:58:10,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-11 23:58:10,009 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-11 23:58:10,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-11 23:58:10,115 INFO L236 CfgBuilder]: Building ICFG [2023-11-11 23:58:10,117 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-11 23:58:10,359 INFO L277 CfgBuilder]: Performing block encoding [2023-11-11 23:58:10,454 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-11 23:58:10,456 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-11 23:58:10,461 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 11:58:10 BoogieIcfgContainer [2023-11-11 23:58:10,461 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-11 23:58:10,462 INFO L112 PluginConnector]: ------------------------CodeCheck---------------------------- [2023-11-11 23:58:10,462 INFO L270 PluginConnector]: Initializing CodeCheck... [2023-11-11 23:58:10,474 INFO L274 PluginConnector]: CodeCheck initialized [2023-11-11 23:58:10,474 INFO L184 PluginConnector]: Executing the observer CodeCheckObserver from plugin CodeCheck for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 11:58:10" (1/1) ... [2023-11-11 23:58:10,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-11 23:58:10,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-11 23:58:10,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 9 states and 12 transitions. [2023-11-11 23:58:10,545 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 12 transitions. [2023-11-11 23:58:10,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-11 23:58:10,548 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-11 23:58:10,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-11 23:58:10,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-11 23:58:10,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-11 23:58:11,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-11 23:58:11,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 10 states and 13 transitions. [2023-11-11 23:58:11,014 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2023-11-11 23:58:11,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-11 23:58:11,014 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-11 23:58:11,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-11 23:58:11,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-11 23:58:11,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-11 23:58:11,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-11 23:58:11,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 11 states and 14 transitions. [2023-11-11 23:58:11,250 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2023-11-11 23:58:11,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-11 23:58:11,250 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-11 23:58:11,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-11 23:58:11,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-11 23:58:12,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-11 23:58:13,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-11 23:58:13,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 17 states and 29 transitions. [2023-11-11 23:58:13,003 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 29 transitions. [2023-11-11 23:58:13,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-11 23:58:13,009 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-11 23:58:13,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-11 23:58:13,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-11 23:58:13,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-11 23:58:13,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-11 23:58:13,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 19 states and 33 transitions. [2023-11-11 23:58:13,896 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 33 transitions. [2023-11-11 23:58:13,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-11 23:58:13,897 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-11 23:58:13,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-11 23:58:13,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-11 23:58:14,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-11 23:58:14,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-11 23:58:14,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 20 states and 34 transitions. [2023-11-11 23:58:14,248 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 34 transitions. [2023-11-11 23:58:14,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-11 23:58:14,249 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-11 23:58:14,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-11 23:58:14,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-11 23:58:15,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-11 23:58:16,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-11 23:58:16,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 25 states and 46 transitions. [2023-11-11 23:58:16,591 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 46 transitions. [2023-11-11 23:58:16,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-11 23:58:16,592 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-11 23:58:16,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-11 23:58:16,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-11 23:58:16,780 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-11 23:58:17,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-11 23:58:17,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 27 states and 53 transitions. [2023-11-11 23:58:17,455 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 53 transitions. [2023-11-11 23:58:17,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-11 23:58:17,458 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-11 23:58:17,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-11 23:58:17,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-11 23:58:17,636 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-11 23:58:17,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-11 23:58:17,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 28 states and 54 transitions. [2023-11-11 23:58:17,948 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 54 transitions. [2023-11-11 23:58:17,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-11 23:58:17,949 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-11 23:58:17,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-11 23:58:17,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-11 23:58:18,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-11 23:58:19,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-11 23:58:19,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 32 states and 62 transitions. [2023-11-11 23:58:19,162 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 62 transitions. [2023-11-11 23:58:19,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-11 23:58:19,163 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-11 23:58:19,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-11 23:58:19,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-11 23:58:19,500 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-11 23:58:19,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-11 23:58:19,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 29 states and 50 transitions. [2023-11-11 23:58:19,951 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 50 transitions. [2023-11-11 23:58:19,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-11 23:58:19,953 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-11 23:58:19,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-11 23:58:19,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-11 23:58:21,059 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-11 23:58:24,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-11 23:58:24,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 35 states and 63 transitions. [2023-11-11 23:58:24,160 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 63 transitions. [2023-11-11 23:58:24,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-11 23:58:24,161 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-11 23:58:24,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-11 23:58:24,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-11 23:58:24,500 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-11 23:58:25,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-11 23:58:25,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 37 states and 67 transitions. [2023-11-11 23:58:25,710 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 67 transitions. [2023-11-11 23:58:25,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-11 23:58:25,711 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-11 23:58:25,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-11 23:58:25,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-11 23:58:25,898 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-11 23:58:26,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-11 23:58:26,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 38 states and 68 transitions. [2023-11-11 23:58:26,264 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 68 transitions. [2023-11-11 23:58:26,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-11 23:58:26,265 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-11 23:58:26,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-11 23:58:26,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-11 23:58:26,305 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-11 23:58:26,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-11 23:58:26,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-11 23:58:26,414 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-11 23:58:26,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-11 23:58:26,491 WARN L476 CodeCheckObserver]: This program is UNSAFE, Check terminated with 14 iterations. [2023-11-11 23:58:26,532 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck CFG 11.11 11:58:26 ImpRootNode [2023-11-11 23:58:26,535 INFO L131 PluginConnector]: ------------------------ END CodeCheck---------------------------- [2023-11-11 23:58:26,536 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-11 23:58:26,536 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-11 23:58:26,536 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-11 23:58:26,537 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 11:58:10" (3/4) ... [2023-11-11 23:58:26,537 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-11-11 23:58:26,616 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20452520-a0e7-415b-86ad-93556477087b/bin/ukojak-verify-0OAaufAVZV/witness.graphml [2023-11-11 23:58:26,617 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-11 23:58:26,618 INFO L158 Benchmark]: Toolchain (without parser) took 17021.31ms. Allocated memory was 119.5MB in the beginning and 144.7MB in the end (delta: 25.2MB). Free memory was 80.2MB in the beginning and 97.2MB in the end (delta: -16.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-11 23:58:26,618 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 119.5MB. Free memory is still 91.3MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-11 23:58:26,619 INFO L158 Benchmark]: CACSL2BoogieTranslator took 248.12ms. Allocated memory is still 119.5MB. Free memory was 79.8MB in the beginning and 69.2MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-11 23:58:26,619 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.23ms. Allocated memory is still 119.5MB. Free memory was 69.2MB in the beginning and 67.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-11 23:58:26,620 INFO L158 Benchmark]: Boogie Preprocessor took 27.06ms. Allocated memory is still 119.5MB. Free memory was 67.7MB in the beginning and 66.4MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-11 23:58:26,620 INFO L158 Benchmark]: RCFGBuilder took 543.98ms. Allocated memory is still 119.5MB. Free memory was 66.4MB in the beginning and 52.2MB in the end (delta: 14.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-11 23:58:26,621 INFO L158 Benchmark]: CodeCheck took 16072.89ms. Allocated memory was 119.5MB in the beginning and 144.7MB in the end (delta: 25.2MB). Free memory was 52.1MB in the beginning and 99.2MB in the end (delta: -47.1MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-11 23:58:26,621 INFO L158 Benchmark]: Witness Printer took 81.34ms. Allocated memory is still 144.7MB. Free memory was 99.2MB in the beginning and 97.2MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-11 23:58:26,623 INFO L338 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: 16.0s, OverallIterations: 14, TraceHistogramMax: 0, PathProgramHistogramMax: 0, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 322 SdHoareTripleChecker+Valid, 4.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 90 mSDsluCounter, 52 SdHoareTripleChecker+Invalid, 4.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 941 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1915 IncrementalHoareTripleChecker+Invalid, 2856 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 941 mSolverCounterUnsat, 52 mSDtfsCounter, 1915 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1325 GetRequests, 1085 SyntacticMatches, 54 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18717 ImplicationChecksByTransitivity, 11.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, InterpolantAutomatonStates: 0, traceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 4.6s InterpolantComputationTime, 145 NumberOfCodeBlocks, 145 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 119 ConstructedInterpolants, 0 QuantifiedInterpolants, 632 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 13 InterpolantComputations, 2 PerfectInterpolantSequences, 32/99 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 [MAX=2, cont=0, i=0, str1={29135:0}, str2={29136:0}] [L22] COND TRUE i= 0 [L30] EXPR str1[0] [L30] str2[j] = str1[0] [L31] j++ [L29] i-- VAL [MAX=2, cont=0, i=0, j=1, str1={29135:0}, str2={29136:0}] [L29] COND TRUE i >= 0 [L30] EXPR str1[0] [L30] str2[j] = str1[0] [L31] j++ [L29] i-- VAL [MAX=2, cont=0, i=-1, j=2, str1={29135:0}, str2={29136:0}] [L29] COND FALSE !(i >= 0) [L34] j = MAX-1 [L35] i=0 VAL [MAX=2, cont=0, i=0, j=1, str1={29135:0}, str2={29136:0}] [L35] COND TRUE i