./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/while_infinite_loop_4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5870a721-409f-47e8-88a1-b906c4310c40/bin/uautomizer-Z5i5R5N3CC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5870a721-409f-47e8-88a1-b906c4310c40/bin/uautomizer-Z5i5R5N3CC/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5870a721-409f-47e8-88a1-b906c4310c40/bin/uautomizer-Z5i5R5N3CC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5870a721-409f-47e8-88a1-b906c4310c40/bin/uautomizer-Z5i5R5N3CC/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/while_infinite_loop_4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5870a721-409f-47e8-88a1-b906c4310c40/bin/uautomizer-Z5i5R5N3CC/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5870a721-409f-47e8-88a1-b906c4310c40/bin/uautomizer-Z5i5R5N3CC --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cf11ae0ce80f2ff20585fcb052cccfcf6fefbf1f ................................................................................................................................................................................................................................................................................ 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 0.2.0-7b2dab5 [2021-10-11 00:25:32,825 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 00:25:32,828 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 00:25:32,864 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 00:25:32,865 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 00:25:32,867 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 00:25:32,869 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 00:25:32,872 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 00:25:32,875 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 00:25:32,876 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 00:25:32,878 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 00:25:32,880 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 00:25:32,881 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 00:25:32,882 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 00:25:32,884 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 00:25:32,886 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 00:25:32,887 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 00:25:32,889 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 00:25:32,891 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 00:25:32,894 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 00:25:32,897 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 00:25:32,899 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 00:25:32,901 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 00:25:32,902 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 00:25:32,907 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 00:25:32,907 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 00:25:32,908 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 00:25:32,909 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 00:25:32,910 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 00:25:32,912 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 00:25:32,912 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 00:25:32,914 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 00:25:32,915 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 00:25:32,917 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 00:25:32,918 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 00:25:32,919 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 00:25:32,920 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 00:25:32,920 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 00:25:32,921 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 00:25:32,922 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 00:25:32,924 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 00:25:32,925 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5870a721-409f-47e8-88a1-b906c4310c40/bin/uautomizer-Z5i5R5N3CC/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-11 00:25:32,954 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 00:25:32,954 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 00:25:32,956 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-11 00:25:32,956 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-11 00:25:32,957 INFO L138 SettingsManager]: * Use SBE=true [2021-10-11 00:25:32,957 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 00:25:32,958 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 00:25:32,958 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 00:25:32,959 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 00:25:32,959 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 00:25:32,960 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 00:25:32,960 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 00:25:32,961 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 00:25:32,961 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 00:25:32,961 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 00:25:32,962 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 00:25:32,962 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 00:25:32,963 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 00:25:32,964 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-11 00:25:32,964 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 00:25:32,964 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 00:25:32,965 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 00:25:32,965 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 00:25:32,965 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 00:25:32,966 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-11 00:25:32,966 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 00:25:32,966 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 00:25:32,967 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 00:25:32,967 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_5870a721-409f-47e8-88a1-b906c4310c40/bin/uautomizer-Z5i5R5N3CC/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5870a721-409f-47e8-88a1-b906c4310c40/bin/uautomizer-Z5i5R5N3CC Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cf11ae0ce80f2ff20585fcb052cccfcf6fefbf1f [2021-10-11 00:25:33,247 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 00:25:33,292 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 00:25:33,297 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 00:25:33,298 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 00:25:33,299 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 00:25:33,302 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5870a721-409f-47e8-88a1-b906c4310c40/bin/uautomizer-Z5i5R5N3CC/../../sv-benchmarks/c/loops/while_infinite_loop_4.c [2021-10-11 00:25:33,401 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5870a721-409f-47e8-88a1-b906c4310c40/bin/uautomizer-Z5i5R5N3CC/data/f8da05a35/cfbd47a9ea664d79ba3065558945f001/FLAG73c051d52 [2021-10-11 00:25:34,090 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 00:25:34,092 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5870a721-409f-47e8-88a1-b906c4310c40/sv-benchmarks/c/loops/while_infinite_loop_4.c [2021-10-11 00:25:34,104 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5870a721-409f-47e8-88a1-b906c4310c40/bin/uautomizer-Z5i5R5N3CC/data/f8da05a35/cfbd47a9ea664d79ba3065558945f001/FLAG73c051d52 [2021-10-11 00:25:34,443 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5870a721-409f-47e8-88a1-b906c4310c40/bin/uautomizer-Z5i5R5N3CC/data/f8da05a35/cfbd47a9ea664d79ba3065558945f001 [2021-10-11 00:25:34,447 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 00:25:34,449 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 00:25:34,451 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 00:25:34,451 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 00:25:34,456 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 00:25:34,457 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:25:34" (1/1) ... [2021-10-11 00:25:34,459 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55ce78f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:25:34, skipping insertion in model container [2021-10-11 00:25:34,460 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:25:34" (1/1) ... [2021-10-11 00:25:34,468 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 00:25:34,482 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 00:25:34,715 WARN L226 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_5870a721-409f-47e8-88a1-b906c4310c40/sv-benchmarks/c/loops/while_infinite_loop_4.c[333,346] [2021-10-11 00:25:34,734 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 00:25:34,749 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 00:25:34,765 WARN L226 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_5870a721-409f-47e8-88a1-b906c4310c40/sv-benchmarks/c/loops/while_infinite_loop_4.c[333,346] [2021-10-11 00:25:34,768 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 00:25:34,785 INFO L208 MainTranslator]: Completed translation [2021-10-11 00:25:34,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:25:34 WrapperNode [2021-10-11 00:25:34,786 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 00:25:34,787 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 00:25:34,787 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 00:25:34,788 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 00:25:34,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:25:34" (1/1) ... [2021-10-11 00:25:34,805 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:25:34" (1/1) ... [2021-10-11 00:25:34,826 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 00:25:34,827 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 00:25:34,827 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 00:25:34,827 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 00:25:34,837 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:25:34" (1/1) ... [2021-10-11 00:25:34,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:25:34" (1/1) ... [2021-10-11 00:25:34,839 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:25:34" (1/1) ... [2021-10-11 00:25:34,840 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:25:34" (1/1) ... [2021-10-11 00:25:34,843 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:25:34" (1/1) ... [2021-10-11 00:25:34,848 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:25:34" (1/1) ... [2021-10-11 00:25:34,850 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:25:34" (1/1) ... [2021-10-11 00:25:34,852 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 00:25:34,853 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 00:25:34,853 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 00:25:34,853 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 00:25:34,855 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:25:34" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5870a721-409f-47e8-88a1-b906c4310c40/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (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:2000 [2021-10-11 00:25:34,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 00:25:34,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 00:25:34,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 00:25:34,963 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 00:25:35,316 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 00:25:35,332 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-10-11 00:25:35,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:25:35 BoogieIcfgContainer [2021-10-11 00:25:35,335 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 00:25:35,337 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 00:25:35,337 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 00:25:35,342 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 00:25:35,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 12:25:34" (1/3) ... [2021-10-11 00:25:35,343 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@602f9df5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:25:35, skipping insertion in model container [2021-10-11 00:25:35,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:25:34" (2/3) ... [2021-10-11 00:25:35,344 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@602f9df5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:25:35, skipping insertion in model container [2021-10-11 00:25:35,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:25:35" (3/3) ... [2021-10-11 00:25:35,346 INFO L111 eAbstractionObserver]: Analyzing ICFG while_infinite_loop_4.c [2021-10-11 00:25:35,379 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 00:25:35,384 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-10-11 00:25:35,417 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-11 00:25:35,462 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 00:25:35,465 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 00:25:35,465 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 00:25:35,465 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 00:25:35,465 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 00:25:35,466 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 00:25:35,466 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 00:25:35,466 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 00:25:35,485 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2021-10-11 00:25:35,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-11 00:25:35,493 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:25:35,494 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-11 00:25:35,495 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:25:35,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:25:35,507 INFO L82 PathProgramCache]: Analyzing trace with hash 890491815, now seen corresponding path program 1 times [2021-10-11 00:25:35,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:25:35,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616462739] [2021-10-11 00:25:35,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:25:35,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:25:35,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:25:35,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616462739] [2021-10-11 00:25:35,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:25:35,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 00:25:35,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244627083] [2021-10-11 00:25:35,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-10-11 00:25:35,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:25:35,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-11 00:25:35,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 00:25:35,746 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 2 states. [2021-10-11 00:25:35,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:25:35,782 INFO L93 Difference]: Finished difference Result 22 states and 32 transitions. [2021-10-11 00:25:35,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-11 00:25:35,784 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2021-10-11 00:25:35,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:25:35,805 INFO L225 Difference]: With dead ends: 22 [2021-10-11 00:25:35,812 INFO L226 Difference]: Without dead ends: 8 [2021-10-11 00:25:35,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 00:25:35,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-10-11 00:25:35,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-10-11 00:25:35,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-11 00:25:35,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-10-11 00:25:35,869 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2021-10-11 00:25:35,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:25:35,870 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-10-11 00:25:35,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-10-11 00:25:35,872 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-10-11 00:25:35,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-11 00:25:35,872 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:25:35,873 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:25:35,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 00:25:35,873 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:25:35,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:25:35,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1810848111, now seen corresponding path program 1 times [2021-10-11 00:25:35,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:25:35,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629490005] [2021-10-11 00:25:35,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:25:35,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:25:35,940 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:25:35,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:25:35,972 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:25:36,017 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-11 00:25:36,019 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 00:25:36,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 00:25:36,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 12:25:36 BoogieIcfgContainer [2021-10-11 00:25:36,053 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 00:25:36,054 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 00:25:36,054 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 00:25:36,055 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 00:25:36,056 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:25:35" (3/4) ... [2021-10-11 00:25:36,058 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-11 00:25:36,122 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5870a721-409f-47e8-88a1-b906c4310c40/bin/uautomizer-Z5i5R5N3CC/witness.graphml [2021-10-11 00:25:36,123 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 00:25:36,127 INFO L168 Benchmark]: Toolchain (without parser) took 1675.54 ms. Allocated memory was 94.4 MB in the beginning and 115.3 MB in the end (delta: 21.0 MB). Free memory was 62.0 MB in the beginning and 85.7 MB in the end (delta: -23.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:25:36,128 INFO L168 Benchmark]: CDTParser took 0.70 ms. Allocated memory is still 94.4 MB. Free memory was 48.7 MB in the beginning and 48.6 MB in the end (delta: 77.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:25:36,129 INFO L168 Benchmark]: CACSL2BoogieTranslator took 335.17 ms. Allocated memory is still 94.4 MB. Free memory was 61.8 MB in the beginning and 70.6 MB in the end (delta: -8.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 00:25:36,130 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.88 ms. Allocated memory is still 94.4 MB. Free memory was 70.6 MB in the beginning and 69.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 00:25:36,131 INFO L168 Benchmark]: Boogie Preprocessor took 25.16 ms. Allocated memory is still 94.4 MB. Free memory was 69.3 MB in the beginning and 68.1 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:25:36,134 INFO L168 Benchmark]: RCFGBuilder took 482.21 ms. Allocated memory is still 94.4 MB. Free memory was 68.1 MB in the beginning and 56.9 MB in the end (delta: 11.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-11 00:25:36,135 INFO L168 Benchmark]: TraceAbstraction took 716.04 ms. Allocated memory was 94.4 MB in the beginning and 115.3 MB in the end (delta: 21.0 MB). Free memory was 56.6 MB in the beginning and 87.2 MB in the end (delta: -30.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:25:36,139 INFO L168 Benchmark]: Witness Printer took 69.96 ms. Allocated memory is still 115.3 MB. Free memory was 87.2 MB in the beginning and 85.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 00:25:36,142 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.70 ms. Allocated memory is still 94.4 MB. Free memory was 48.7 MB in the beginning and 48.6 MB in the end (delta: 77.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 335.17 ms. Allocated memory is still 94.4 MB. Free memory was 61.8 MB in the beginning and 70.6 MB in the end (delta: -8.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.88 ms. Allocated memory is still 94.4 MB. Free memory was 70.6 MB in the beginning and 69.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 25.16 ms. Allocated memory is still 94.4 MB. Free memory was 69.3 MB in the beginning and 68.1 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 482.21 ms. Allocated memory is still 94.4 MB. Free memory was 68.1 MB in the beginning and 56.9 MB in the end (delta: 11.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 716.04 ms. Allocated memory was 94.4 MB in the beginning and 115.3 MB in the end (delta: 21.0 MB). Free memory was 56.6 MB in the beginning and 87.2 MB in the end (delta: -30.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 69.96 ms. Allocated memory is still 115.3 MB. Free memory was 87.2 MB in the beginning and 85.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L12] int x=0; VAL [x=0] [L26] COND TRUE 1 VAL [x=0] [L16] COND TRUE 1 [L17] x=1 VAL [x=1] [L6] COND TRUE !(cond) VAL [x=1] [L7] reach_error() VAL [x=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 8 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 13 NumberOfCodeBlocks, 13 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 25 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...