./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted-lit/ChenCookFuhsNimkarOHearn-TACAS2014-Introduction.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 678e0110 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_80b72cb7-810c-4a4e-ae1c-ec3494ccfdab/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_80b72cb7-810c-4a4e-ae1c-ec3494ccfdab/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_80b72cb7-810c-4a4e-ae1c-ec3494ccfdab/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_80b72cb7-810c-4a4e-ae1c-ec3494ccfdab/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted-lit/ChenCookFuhsNimkarOHearn-TACAS2014-Introduction.c -s /tmp/vcloud-vcloud-master/worker/run_dir_80b72cb7-810c-4a4e-ae1c-ec3494ccfdab/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_80b72cb7-810c-4a4e-ae1c-ec3494ccfdab/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 75dd2ce3f6219a56f38a72471186bda1e7610d5c ........................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(TERM) --- Real Ultimate output --- This is Ultimate 0.1.24-678e011 [2019-11-20 00:01:14,287 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 00:01:14,289 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 00:01:14,305 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 00:01:14,305 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 00:01:14,306 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 00:01:14,308 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 00:01:14,310 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 00:01:14,312 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 00:01:14,313 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 00:01:14,314 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 00:01:14,315 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 00:01:14,315 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 00:01:14,316 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 00:01:14,317 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 00:01:14,318 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 00:01:14,319 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 00:01:14,320 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 00:01:14,322 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 00:01:14,324 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 00:01:14,326 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 00:01:14,327 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 00:01:14,328 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 00:01:14,329 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 00:01:14,331 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 00:01:14,332 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 00:01:14,332 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 00:01:14,333 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 00:01:14,333 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 00:01:14,334 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 00:01:14,334 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 00:01:14,335 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 00:01:14,336 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 00:01:14,336 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 00:01:14,337 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 00:01:14,338 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 00:01:14,338 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 00:01:14,339 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 00:01:14,339 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 00:01:14,340 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 00:01:14,340 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 00:01:14,341 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_80b72cb7-810c-4a4e-ae1c-ec3494ccfdab/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2019-11-20 00:01:14,357 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 00:01:14,357 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 00:01:14,358 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 00:01:14,358 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 00:01:14,358 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 00:01:14,358 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-11-20 00:01:14,359 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-11-20 00:01:14,359 INFO L138 SettingsManager]: * Use old map elimination=false [2019-11-20 00:01:14,359 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-11-20 00:01:14,359 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-11-20 00:01:14,359 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-11-20 00:01:14,360 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 00:01:14,360 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-20 00:01:14,360 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 00:01:14,360 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 00:01:14,360 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-11-20 00:01:14,360 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-11-20 00:01:14,361 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-11-20 00:01:14,361 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 00:01:14,361 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-11-20 00:01:14,361 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 00:01:14,361 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-11-20 00:01:14,362 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 00:01:14,362 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 00:01:14,362 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-11-20 00:01:14,362 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 00:01:14,362 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-20 00:01:14,363 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-11-20 00:01:14,363 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-11-20 00:01:14,364 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_80b72cb7-810c-4a4e-ae1c-ec3494ccfdab/bin/uautomizer 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(F end) ) 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 -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 75dd2ce3f6219a56f38a72471186bda1e7610d5c [2019-11-20 00:01:14,512 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 00:01:14,527 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 00:01:14,530 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 00:01:14,531 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 00:01:14,531 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 00:01:14,532 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_80b72cb7-810c-4a4e-ae1c-ec3494ccfdab/bin/uautomizer/../../sv-benchmarks/c/termination-crafted-lit/ChenCookFuhsNimkarOHearn-TACAS2014-Introduction.c [2019-11-20 00:01:14,609 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_80b72cb7-810c-4a4e-ae1c-ec3494ccfdab/bin/uautomizer/data/3f6eb54c7/0273dd34c9fa47179e820883832792fd/FLAG8d10ca720 [2019-11-20 00:01:14,957 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 00:01:14,957 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_80b72cb7-810c-4a4e-ae1c-ec3494ccfdab/sv-benchmarks/c/termination-crafted-lit/ChenCookFuhsNimkarOHearn-TACAS2014-Introduction.c [2019-11-20 00:01:14,963 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_80b72cb7-810c-4a4e-ae1c-ec3494ccfdab/bin/uautomizer/data/3f6eb54c7/0273dd34c9fa47179e820883832792fd/FLAG8d10ca720 [2019-11-20 00:01:15,336 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_80b72cb7-810c-4a4e-ae1c-ec3494ccfdab/bin/uautomizer/data/3f6eb54c7/0273dd34c9fa47179e820883832792fd [2019-11-20 00:01:15,338 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 00:01:15,340 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 00:01:15,341 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 00:01:15,341 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 00:01:15,344 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 00:01:15,345 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:01:15" (1/1) ... [2019-11-20 00:01:15,347 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a6c5003 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:01:15, skipping insertion in model container [2019-11-20 00:01:15,347 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:01:15" (1/1) ... [2019-11-20 00:01:15,353 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 00:01:15,366 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 00:01:15,487 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 00:01:15,490 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 00:01:15,503 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 00:01:15,573 INFO L192 MainTranslator]: Completed translation [2019-11-20 00:01:15,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:01:15 WrapperNode [2019-11-20 00:01:15,574 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 00:01:15,574 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 00:01:15,575 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 00:01:15,575 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 00:01:15,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:01:15" (1/1) ... [2019-11-20 00:01:15,588 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:01:15" (1/1) ... [2019-11-20 00:01:15,602 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 00:01:15,602 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 00:01:15,602 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 00:01:15,602 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 00:01:15,608 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:01:15" (1/1) ... [2019-11-20 00:01:15,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:01:15" (1/1) ... [2019-11-20 00:01:15,609 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:01:15" (1/1) ... [2019-11-20 00:01:15,609 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:01:15" (1/1) ... [2019-11-20 00:01:15,610 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:01:15" (1/1) ... [2019-11-20 00:01:15,615 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:01:15" (1/1) ... [2019-11-20 00:01:15,615 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:01:15" (1/1) ... [2019-11-20 00:01:15,616 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 00:01:15,617 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 00:01:15,617 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 00:01:15,617 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 00:01:15,618 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:01:15" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_80b72cb7-810c-4a4e-ae1c-ec3494ccfdab/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 00:01:15,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 00:01:15,672 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 00:01:15,797 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 00:01:15,797 INFO L285 CfgBuilder]: Removed 5 assume(true) statements. [2019-11-20 00:01:15,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:01:15 BoogieIcfgContainer [2019-11-20 00:01:15,798 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 00:01:15,799 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-11-20 00:01:15,799 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-11-20 00:01:15,802 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-11-20 00:01:15,803 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-20 00:01:15,803 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 20.11 12:01:15" (1/3) ... [2019-11-20 00:01:15,804 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@7266d2ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.11 12:01:15, skipping insertion in model container [2019-11-20 00:01:15,804 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-20 00:01:15,805 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:01:15" (2/3) ... [2019-11-20 00:01:15,805 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@7266d2ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.11 12:01:15, skipping insertion in model container [2019-11-20 00:01:15,805 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-20 00:01:15,806 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:01:15" (3/3) ... [2019-11-20 00:01:15,807 INFO L371 chiAutomizerObserver]: Analyzing ICFG ChenCookFuhsNimkarOHearn-TACAS2014-Introduction.c [2019-11-20 00:01:15,847 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-11-20 00:01:15,847 INFO L357 BuchiCegarLoop]: Hoare is false [2019-11-20 00:01:15,847 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-11-20 00:01:15,847 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 00:01:15,847 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 00:01:15,847 INFO L361 BuchiCegarLoop]: Difference is false [2019-11-20 00:01:15,847 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 00:01:15,848 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-11-20 00:01:15,859 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states. [2019-11-20 00:01:15,876 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2019-11-20 00:01:15,876 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 00:01:15,876 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 00:01:15,881 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-20 00:01:15,881 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1] [2019-11-20 00:01:15,881 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-11-20 00:01:15,882 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states. [2019-11-20 00:01:15,882 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2019-11-20 00:01:15,883 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 00:01:15,883 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 00:01:15,883 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-20 00:01:15,883 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1] [2019-11-20 00:01:15,889 INFO L794 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_#t~nondet2, main_~k~0, main_~i~0;havoc main_~k~0;havoc main_~i~0;main_~k~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~i~0 := main_#t~nondet1;havoc main_#t~nondet1; 8#L18true assume !(main_~k~0 >= 0);main_~i~0 := -1; 6#L23-1true [2019-11-20 00:01:15,889 INFO L796 eck$LassoCheckResult]: Loop: 6#L23-1true assume !!(main_~i~0 >= 0);main_~i~0 := main_#t~nondet2;havoc main_#t~nondet2; 6#L23-1true [2019-11-20 00:01:15,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:01:15,893 INFO L82 PathProgramCache]: Analyzing trace with hash 998, now seen corresponding path program 1 times [2019-11-20 00:01:15,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:01:15,900 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654686740] [2019-11-20 00:01:15,901 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:01:15,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 00:01:15,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 00:01:15,976 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 00:01:15,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:01:15,977 INFO L82 PathProgramCache]: Analyzing trace with hash 46, now seen corresponding path program 1 times [2019-11-20 00:01:15,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:01:15,977 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198891626] [2019-11-20 00:01:15,977 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:01:15,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 00:01:15,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 00:01:15,984 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 00:01:15,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:01:15,985 INFO L82 PathProgramCache]: Analyzing trace with hash 30953, now seen corresponding path program 1 times [2019-11-20 00:01:15,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:01:15,986 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589277388] [2019-11-20 00:01:15,986 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:01:15,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:01:16,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 00:01:16,076 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589277388] [2019-11-20 00:01:16,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 00:01:16,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-20 00:01:16,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760939489] [2019-11-20 00:01:16,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:01:16,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 00:01:16,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 00:01:16,175 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2019-11-20 00:01:16,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:01:16,195 INFO L93 Difference]: Finished difference Result 8 states and 9 transitions. [2019-11-20 00:01:16,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 00:01:16,197 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 8 states and 9 transitions. [2019-11-20 00:01:16,198 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2019-11-20 00:01:16,202 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 8 states to 3 states and 3 transitions. [2019-11-20 00:01:16,203 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 3 [2019-11-20 00:01:16,203 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 3 [2019-11-20 00:01:16,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 3 transitions. [2019-11-20 00:01:16,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-20 00:01:16,204 INFO L688 BuchiCegarLoop]: Abstraction has 3 states and 3 transitions. [2019-11-20 00:01:16,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3 states and 3 transitions. [2019-11-20 00:01:16,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3 to 3. [2019-11-20 00:01:16,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-11-20 00:01:16,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 3 transitions. [2019-11-20 00:01:16,224 INFO L711 BuchiCegarLoop]: Abstraction has 3 states and 3 transitions. [2019-11-20 00:01:16,225 INFO L591 BuchiCegarLoop]: Abstraction has 3 states and 3 transitions. [2019-11-20 00:01:16,225 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-11-20 00:01:16,225 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 3 states and 3 transitions. [2019-11-20 00:01:16,225 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2019-11-20 00:01:16,225 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 00:01:16,225 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 00:01:16,226 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-20 00:01:16,226 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1] [2019-11-20 00:01:16,226 INFO L794 eck$LassoCheckResult]: Stem: 26#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_#t~nondet2, main_~k~0, main_~i~0;havoc main_~k~0;havoc main_~i~0;main_~k~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~i~0 := main_#t~nondet1;havoc main_#t~nondet1; 27#L18 assume main_~k~0 >= 0; 28#L23-1 [2019-11-20 00:01:16,226 INFO L796 eck$LassoCheckResult]: Loop: 28#L23-1 assume !!(main_~i~0 >= 0);main_~i~0 := main_#t~nondet2;havoc main_#t~nondet2; 28#L23-1 [2019-11-20 00:01:16,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:01:16,226 INFO L82 PathProgramCache]: Analyzing trace with hash 996, now seen corresponding path program 1 times [2019-11-20 00:01:16,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:01:16,227 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636210192] [2019-11-20 00:01:16,227 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:01:16,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 00:01:16,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 00:01:16,234 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 00:01:16,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:01:16,235 INFO L82 PathProgramCache]: Analyzing trace with hash 46, now seen corresponding path program 2 times [2019-11-20 00:01:16,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:01:16,235 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184682518] [2019-11-20 00:01:16,235 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:01:16,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 00:01:16,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 00:01:16,241 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 00:01:16,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:01:16,242 INFO L82 PathProgramCache]: Analyzing trace with hash 30891, now seen corresponding path program 1 times [2019-11-20 00:01:16,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:01:16,242 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506904401] [2019-11-20 00:01:16,242 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:01:16,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 00:01:16,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 00:01:16,253 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 00:01:16,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 20.11 12:01:16 BoogieIcfgContainer [2019-11-20 00:01:16,317 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-11-20 00:01:16,318 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 00:01:16,318 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 00:01:16,318 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 00:01:16,318 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:01:15" (3/4) ... [2019-11-20 00:01:16,321 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2019-11-20 00:01:16,350 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_80b72cb7-810c-4a4e-ae1c-ec3494ccfdab/bin/uautomizer/witness.graphml [2019-11-20 00:01:16,351 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 00:01:16,353 INFO L168 Benchmark]: Toolchain (without parser) took 1012.49 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 153.1 MB). Free memory was 944.8 MB in the beginning and 1.1 GB in the end (delta: -149.3 MB). Peak memory consumption was 3.8 MB. Max. memory is 11.5 GB. [2019-11-20 00:01:16,353 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 00:01:16,354 INFO L168 Benchmark]: CACSL2BoogieTranslator took 233.24 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 153.1 MB). Free memory was 944.8 MB in the beginning and 1.2 GB in the end (delta: -208.0 MB). Peak memory consumption was 23.4 MB. Max. memory is 11.5 GB. [2019-11-20 00:01:16,354 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.44 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. [2019-11-20 00:01:16,355 INFO L168 Benchmark]: Boogie Preprocessor took 14.62 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 00:01:16,355 INFO L168 Benchmark]: RCFGBuilder took 181.69 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. [2019-11-20 00:01:16,356 INFO L168 Benchmark]: BuchiAutomizer took 518.47 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 33.9 MB). Peak memory consumption was 33.9 MB. Max. memory is 11.5 GB. [2019-11-20 00:01:16,356 INFO L168 Benchmark]: Witness Printer took 33.14 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 00:01:16,359 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 233.24 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 153.1 MB). Free memory was 944.8 MB in the beginning and 1.2 GB in the end (delta: -208.0 MB). Peak memory consumption was 23.4 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 27.44 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 14.62 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 181.69 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 518.47 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 33.9 MB). Peak memory consumption was 33.9 MB. Max. memory is 11.5 GB. * Witness Printer took 33.14 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 1 terminating modules (1 trivial, 0 deterministic, 0 nondeterministic) and one nonterminating remainder module.1 modules have a trivial ranking function, the largest among these consists of 3 locations. The remainder module has 3 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 0.4s and 2 iterations. TraceHistogramMax:1. Analysis of lassos took 0.3s. Construction of modules took 0.0s. Büchi inclusion checks took 0.0s. Highest rank in rank-based complementation 0. Minimization of det autom 1. Minimization of nondet autom 0. Automata minimization 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 3 states and ocurred in iteration 1. Nontrivial modules had stage [0, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 8 SDtfs, 0 SDslu, 3 SDs, 0 SdLazy, 4 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time LassoAnalysisResults: nont1 unkn0 SFLI0 SFLT0 conc1 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: LassoTerminationAnalysisBenchmarks: not availableLassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 0 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 0 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.0s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - FixpointNonTerminationResult [Line: 23]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite execution State at position 0 is {} State at position 1 is {org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@3bd62575=0, \result=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@120ad6d6=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@5d908c88=0, i=0, k=0} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 14]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L15] int k, i; [L16] k = __VERIFIER_nondet_int() [L17] i = __VERIFIER_nondet_int() [L18] COND TRUE k >= 0 Loop: [L23] COND TRUE i >= 0 [L24] i = __VERIFIER_nondet_int() End of lasso representation. RESULT: Ultimate proved your program to be incorrect! Received shutdown request...