./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/recursive/BallRajamani-SPIN2000-Fig1_false-unreach-call_true-no-overflow_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_2128c2e1-d61e-4e07-9f39-c8b987a7bb19/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_2128c2e1-d61e-4e07-9f39-c8b987a7bb19/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_2128c2e1-d61e-4e07-9f39-c8b987a7bb19/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_2128c2e1-d61e-4e07-9f39-c8b987a7bb19/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/BallRajamani-SPIN2000-Fig1_false-unreach-call_true-no-overflow_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_2128c2e1-d61e-4e07-9f39-c8b987a7bb19/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_2128c2e1-d61e-4e07-9f39-c8b987a7bb19/bin-2019/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ccae6f392e1d87c0b193f39dee91a5c51306cb93 .................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-10-26 20:54:44,250 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 20:54:44,252 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 20:54:44,262 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 20:54:44,262 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 20:54:44,263 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 20:54:44,264 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 20:54:44,266 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 20:54:44,267 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 20:54:44,268 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 20:54:44,269 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 20:54:44,269 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 20:54:44,270 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 20:54:44,270 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 20:54:44,272 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 20:54:44,273 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 20:54:44,273 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 20:54:44,275 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 20:54:44,277 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 20:54:44,278 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 20:54:44,279 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 20:54:44,280 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 20:54:44,282 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-26 20:54:44,283 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-26 20:54:44,283 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-26 20:54:44,284 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-26 20:54:44,285 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-26 20:54:44,286 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-26 20:54:44,287 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-26 20:54:44,287 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-26 20:54:44,288 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-26 20:54:44,288 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-26 20:54:44,289 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-26 20:54:44,289 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-26 20:54:44,290 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-26 20:54:44,290 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-26 20:54:44,291 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_2128c2e1-d61e-4e07-9f39-c8b987a7bb19/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-10-26 20:54:44,304 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 20:54:44,304 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 20:54:44,305 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 20:54:44,305 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-26 20:54:44,305 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-26 20:54:44,305 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-26 20:54:44,305 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-26 20:54:44,306 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-26 20:54:44,306 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-26 20:54:44,306 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-26 20:54:44,306 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-26 20:54:44,307 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 20:54:44,307 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-26 20:54:44,307 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-26 20:54:44,309 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-26 20:54:44,309 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 20:54:44,309 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 20:54:44,309 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 20:54:44,309 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 20:54:44,309 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-26 20:54:44,310 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 20:54:44,310 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 20:54:44,310 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 20:54:44,310 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 20:54:44,310 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 20:54:44,310 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 20:54:44,311 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 20:54:44,311 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 20:54:44,311 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 20:54:44,311 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 20:54:44,311 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-26 20:54:44,312 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 20:54:44,312 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-26 20:54:44,312 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-26 20:54:44,312 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_2128c2e1-d61e-4e07-9f39-c8b987a7bb19/bin-2019/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan 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 -> ccae6f392e1d87c0b193f39dee91a5c51306cb93 [2018-10-26 20:54:44,343 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 20:54:44,354 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 20:54:44,357 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 20:54:44,358 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 20:54:44,359 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 20:54:44,360 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_2128c2e1-d61e-4e07-9f39-c8b987a7bb19/bin-2019/utaipan/../../sv-benchmarks/c/recursive/BallRajamani-SPIN2000-Fig1_false-unreach-call_true-no-overflow_true-termination.c [2018-10-26 20:54:44,426 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_2128c2e1-d61e-4e07-9f39-c8b987a7bb19/bin-2019/utaipan/data/13fd3aff0/7183cb0796a54fc29fbcd644cc12c4ba/FLAG58ceea38d [2018-10-26 20:54:44,792 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 20:54:44,793 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_2128c2e1-d61e-4e07-9f39-c8b987a7bb19/sv-benchmarks/c/recursive/BallRajamani-SPIN2000-Fig1_false-unreach-call_true-no-overflow_true-termination.c [2018-10-26 20:54:44,799 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_2128c2e1-d61e-4e07-9f39-c8b987a7bb19/bin-2019/utaipan/data/13fd3aff0/7183cb0796a54fc29fbcd644cc12c4ba/FLAG58ceea38d [2018-10-26 20:54:44,810 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_2128c2e1-d61e-4e07-9f39-c8b987a7bb19/bin-2019/utaipan/data/13fd3aff0/7183cb0796a54fc29fbcd644cc12c4ba [2018-10-26 20:54:44,812 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 20:54:44,814 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-26 20:54:44,814 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 20:54:44,815 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 20:54:44,822 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 20:54:44,823 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:54:44" (1/1) ... [2018-10-26 20:54:44,825 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f9a755a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:54:44, skipping insertion in model container [2018-10-26 20:54:44,825 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:54:44" (1/1) ... [2018-10-26 20:54:44,834 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 20:54:44,853 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 20:54:44,979 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 20:54:44,983 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 20:54:44,997 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 20:54:45,011 INFO L193 MainTranslator]: Completed translation [2018-10-26 20:54:45,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:54:45 WrapperNode [2018-10-26 20:54:45,011 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 20:54:45,012 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-26 20:54:45,012 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-26 20:54:45,012 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-26 20:54:45,021 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:54:45" (1/1) ... [2018-10-26 20:54:45,027 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:54:45" (1/1) ... [2018-10-26 20:54:45,034 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-26 20:54:45,034 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 20:54:45,034 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 20:54:45,034 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 20:54:45,044 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:54:45" (1/1) ... [2018-10-26 20:54:45,044 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:54:45" (1/1) ... [2018-10-26 20:54:45,045 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:54:45" (1/1) ... [2018-10-26 20:54:45,045 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:54:45" (1/1) ... [2018-10-26 20:54:45,048 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:54:45" (1/1) ... [2018-10-26 20:54:45,050 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:54:45" (1/1) ... [2018-10-26 20:54:45,051 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:54:45" (1/1) ... [2018-10-26 20:54:45,052 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 20:54:45,053 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 20:54:45,053 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 20:54:45,053 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 20:54:45,054 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:54:45" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2128c2e1-d61e-4e07-9f39-c8b987a7bb19/bin-2019/utaipan/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 [2018-10-26 20:54:45,179 INFO L130 BoogieDeclarations]: Found specification of procedure A [2018-10-26 20:54:45,179 INFO L138 BoogieDeclarations]: Found implementation of procedure A [2018-10-26 20:54:45,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-26 20:54:45,179 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-26 20:54:45,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 20:54:45,180 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 20:54:45,180 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-26 20:54:45,180 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-26 20:54:45,504 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 20:54:45,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:54:45 BoogieIcfgContainer [2018-10-26 20:54:45,505 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 20:54:45,506 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 20:54:45,506 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 20:54:45,510 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 20:54:45,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 08:54:44" (1/3) ... [2018-10-26 20:54:45,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d32bc35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:54:45, skipping insertion in model container [2018-10-26 20:54:45,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:54:45" (2/3) ... [2018-10-26 20:54:45,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d32bc35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:54:45, skipping insertion in model container [2018-10-26 20:54:45,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:54:45" (3/3) ... [2018-10-26 20:54:45,516 INFO L112 eAbstractionObserver]: Analyzing ICFG BallRajamani-SPIN2000-Fig1_false-unreach-call_true-no-overflow_true-termination.c [2018-10-26 20:54:45,540 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 20:54:45,555 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 20:54:45,592 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 20:54:45,652 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 20:54:45,662 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 20:54:45,662 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 20:54:45,662 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 20:54:45,662 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 20:54:45,662 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 20:54:45,662 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 20:54:45,663 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 20:54:45,686 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2018-10-26 20:54:45,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-26 20:54:45,699 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:54:45,701 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:54:45,703 INFO L424 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:54:45,709 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:54:45,709 INFO L82 PathProgramCache]: Analyzing trace with hash -284235614, now seen corresponding path program 1 times [2018-10-26 20:54:45,712 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 20:54:45,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:54:45,763 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:54:45,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:54:45,763 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 20:54:45,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:54:46,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-26 20:54:46,005 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:54:46,005 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-26 20:54:46,006 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 21 with the following transitions: [2018-10-26 20:54:46,008 INFO L202 CegarAbsIntRunner]: [0], [7], [9], [10], [11], [15], [17], [19], [22], [24], [32], [33], [34], [36], [37], [38], [39] [2018-10-26 20:54:46,058 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-26 20:54:46,058 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-26 20:54:46,221 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-26 20:54:46,222 INFO L272 AbstractInterpreter]: Visited 17 different actions 20 times. Never merged. Never widened. Never found a fixpoint. Largest state had 7 variables. [2018-10-26 20:54:46,231 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:54:46,232 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-26 20:54:46,233 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 20:54:46,233 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2128c2e1-d61e-4e07-9f39-c8b987a7bb19/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 20:54:46,243 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:54:46,243 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-26 20:54:46,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 20:54:46,290 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 20:54:46,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-26 20:54:46,305 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-26 20:54:46,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-26 20:54:46,491 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-26 20:54:46,491 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2018-10-26 20:54:46,491 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-26 20:54:46,497 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 20:54:46,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 20:54:46,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-26 20:54:46,512 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 5 states. [2018-10-26 20:54:46,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 20:54:46,762 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2018-10-26 20:54:46,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-26 20:54:46,764 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-10-26 20:54:46,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 20:54:46,775 INFO L225 Difference]: With dead ends: 45 [2018-10-26 20:54:46,775 INFO L226 Difference]: Without dead ends: 21 [2018-10-26 20:54:46,778 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-10-26 20:54:46,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-26 20:54:46,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-26 20:54:46,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-26 20:54:46,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2018-10-26 20:54:46,822 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 20 [2018-10-26 20:54:46,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 20:54:46,823 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2018-10-26 20:54:46,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 20:54:46,824 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2018-10-26 20:54:46,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-26 20:54:46,825 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 20:54:46,825 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 20:54:46,826 INFO L424 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 20:54:46,826 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 20:54:46,826 INFO L82 PathProgramCache]: Analyzing trace with hash -920468714, now seen corresponding path program 1 times [2018-10-26 20:54:46,826 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-26 20:54:46,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:54:46,828 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 20:54:46,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 20:54:46,828 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-26 20:54:46,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-26 20:54:46,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-26 20:54:46,882 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-10-26 20:54:46,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 08:54:46 BoogieIcfgContainer [2018-10-26 20:54:46,914 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-26 20:54:46,914 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-26 20:54:46,915 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-26 20:54:46,915 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-26 20:54:46,915 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:54:45" (3/4) ... [2018-10-26 20:54:46,918 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-10-26 20:54:46,968 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_2128c2e1-d61e-4e07-9f39-c8b987a7bb19/bin-2019/utaipan/witness.graphml [2018-10-26 20:54:46,968 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-26 20:54:46,969 INFO L168 Benchmark]: Toolchain (without parser) took 2155.93 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 145.8 MB). Free memory was 960.3 MB in the beginning and 1.1 GB in the end (delta: -110.8 MB). Peak memory consumption was 35.0 MB. Max. memory is 11.5 GB. [2018-10-26 20:54:46,970 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 20:54:46,970 INFO L168 Benchmark]: CACSL2BoogieTranslator took 197.18 ms. Allocated memory is still 1.0 GB. Free memory was 960.3 MB in the beginning and 949.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-26 20:54:46,971 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.67 ms. Allocated memory is still 1.0 GB. Free memory is still 949.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-26 20:54:46,972 INFO L168 Benchmark]: Boogie Preprocessor took 18.62 ms. Allocated memory is still 1.0 GB. Free memory was 949.6 MB in the beginning and 946.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-10-26 20:54:46,973 INFO L168 Benchmark]: RCFGBuilder took 452.28 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 145.8 MB). Free memory was 946.9 MB in the beginning and 1.1 GB in the end (delta: -188.2 MB). Peak memory consumption was 19.9 MB. Max. memory is 11.5 GB. [2018-10-26 20:54:46,974 INFO L168 Benchmark]: TraceAbstraction took 1408.23 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: 61.3 MB). Peak memory consumption was 61.3 MB. Max. memory is 11.5 GB. [2018-10-26 20:54:46,974 INFO L168 Benchmark]: Witness Printer took 53.46 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: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-10-26 20:54:46,977 INFO L336 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 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 197.18 ms. Allocated memory is still 1.0 GB. Free memory was 960.3 MB in the beginning and 949.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 21.67 ms. Allocated memory is still 1.0 GB. Free memory is still 949.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.62 ms. Allocated memory is still 1.0 GB. Free memory was 949.6 MB in the beginning and 946.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 452.28 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 145.8 MB). Free memory was 946.9 MB in the beginning and 1.1 GB in the end (delta: -188.2 MB). Peak memory consumption was 19.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1408.23 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: 61.3 MB). Peak memory consumption was 61.3 MB. Max. memory is 11.5 GB. * Witness Printer took 53.46 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: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 31]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int g; VAL [\old(g)=2, g=0] [L26] int g = __VERIFIER_nondet_int(); [L27] int h = !g; VAL [\old(g)=0, g=1, g=0, h=0] [L28] CALL A(g,h) VAL [\old(a1)=1, \old(a2)=0, \old(g)=0, g=0] [L17] COND TRUE \read(a1) VAL [\old(a1)=1, \old(a2)=0, \old(g)=0, a1=1, a2=0, g=0] [L18] CALL A(a2,a1) VAL [\old(a1)=0, \old(a2)=1, \old(g)=0, g=0] [L17] COND FALSE !(\read(a1)) [L20] RET g = a2 VAL [\old(a1)=0, \old(a2)=1, \old(g)=0, a1=0, a2=1, g=1] [L18] RET A(a2,a1) VAL [\old(a1)=1, \old(a2)=0, \old(g)=0, A(a2,a1)=0, a1=1, a2=0, g=1] [L28] A(g,h) VAL [\old(g)=0, A(g,h)=0, g=1, g=1, h=0] [L29] CALL A(g,h) VAL [\old(a1)=1, \old(a2)=0, \old(g)=1, g=1] [L17] COND TRUE \read(a1) VAL [\old(a1)=1, \old(a2)=0, \old(g)=1, a1=1, a2=0, g=1] [L18] CALL A(a2,a1) VAL [\old(a1)=0, \old(a2)=1, \old(g)=1, g=1] [L17] COND FALSE !(\read(a1)) [L20] RET g = a2 VAL [\old(a1)=0, \old(a2)=1, \old(g)=1, a1=0, a2=1, g=1] [L18] RET A(a2,a1) VAL [\old(a1)=1, \old(a2)=0, \old(g)=1, A(a2,a1)=0, a1=1, a2=0, g=1] [L29] A(g,h) VAL [\old(g)=0, A(g,h)=0, g=1, g=1, h=0] [L30] COND TRUE \read(g) VAL [\old(g)=0, g=1, g=1, h=0] [L31] __VERIFIER_error() VAL [\old(g)=0, g=1, g=1, h=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 23 locations, 1 error locations. UNSAFE Result, 1.2s OverallTime, 2 OverallIterations, 4 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 19 SDtfs, 8 SDslu, 43 SDs, 0 SdLazy, 36 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.2s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 72 NumberOfCodeBlocks, 72 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 57 ConstructedInterpolants, 0 QuantifiedInterpolants, 1976 SizeOfPredicates, 2 NumberOfNonLiveVariables, 66 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 3 InterpolantComputations, 0 PerfectInterpolantSequences, 3/12 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...