./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive/BallRajamani-SPIN2000-Fig1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5fbdf5bf Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive/BallRajamani-SPIN2000-Fig1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 dc0ee77d2c77f6a72f7fe76138da8c8b9afd4553 ................................................................................................................................................................................................................................................................................................................................... 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 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-29 16:17:35,904 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-29 16:17:35,906 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-29 16:17:35,935 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-29 16:17:35,935 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-29 16:17:35,938 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-29 16:17:35,939 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-29 16:17:35,942 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-29 16:17:35,944 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-29 16:17:35,946 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-29 16:17:35,947 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-29 16:17:35,950 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-29 16:17:35,950 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-29 16:17:35,953 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-29 16:17:35,954 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-29 16:17:35,961 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-29 16:17:35,961 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-29 16:17:35,962 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-29 16:17:35,964 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-29 16:17:35,968 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-29 16:17:35,969 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-29 16:17:35,970 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-29 16:17:35,972 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-29 16:17:35,973 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-29 16:17:35,976 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-29 16:17:35,976 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-29 16:17:35,976 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-29 16:17:35,977 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-29 16:17:35,977 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-29 16:17:35,977 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-29 16:17:35,977 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-29 16:17:35,978 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-29 16:17:35,978 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-29 16:17:35,979 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-29 16:17:35,979 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-29 16:17:35,979 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-29 16:17:35,980 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-29 16:17:35,980 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-29 16:17:35,980 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-29 16:17:35,980 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-29 16:17:35,981 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-29 16:17:35,981 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-29 16:17:36,002 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-29 16:17:36,003 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-29 16:17:36,004 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-29 16:17:36,004 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-29 16:17:36,005 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-29 16:17:36,005 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-29 16:17:36,005 INFO L138 SettingsManager]: * Use SBE=true [2021-08-29 16:17:36,006 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-29 16:17:36,006 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-29 16:17:36,006 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-29 16:17:36,006 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-29 16:17:36,007 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-29 16:17:36,007 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-29 16:17:36,007 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-29 16:17:36,007 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-29 16:17:36,007 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-29 16:17:36,007 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-29 16:17:36,008 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-29 16:17:36,008 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-29 16:17:36,008 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-29 16:17:36,008 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-29 16:17:36,016 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-29 16:17:36,017 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 16:17:36,017 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-29 16:17:36,017 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-29 16:17:36,017 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-29 16:17:36,017 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-29 16:17:36,018 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-29 16:17:36,018 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-29 16:17:36,018 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-29 16:17:36,018 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dc0ee77d2c77f6a72f7fe76138da8c8b9afd4553 [2021-08-29 16:17:36,290 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-29 16:17:36,307 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-29 16:17:36,308 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-29 16:17:36,309 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-29 16:17:36,311 INFO L275 PluginConnector]: CDTParser initialized [2021-08-29 16:17:36,312 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/BallRajamani-SPIN2000-Fig1.c [2021-08-29 16:17:36,361 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e6dded0f/f30bbc20985f4f46ac5cc5092b16f80c/FLAGc718ed73a [2021-08-29 16:17:36,704 INFO L306 CDTParser]: Found 1 translation units. [2021-08-29 16:17:36,705 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/BallRajamani-SPIN2000-Fig1.c [2021-08-29 16:17:36,709 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e6dded0f/f30bbc20985f4f46ac5cc5092b16f80c/FLAGc718ed73a [2021-08-29 16:17:36,720 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e6dded0f/f30bbc20985f4f46ac5cc5092b16f80c [2021-08-29 16:17:36,723 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-29 16:17:36,724 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-29 16:17:36,726 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-29 16:17:36,726 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-29 16:17:36,728 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-29 16:17:36,729 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 04:17:36" (1/1) ... [2021-08-29 16:17:36,729 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d620638 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:17:36, skipping insertion in model container [2021-08-29 16:17:36,730 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 04:17:36" (1/1) ... [2021-08-29 16:17:36,734 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-29 16:17:36,744 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-29 16:17:36,831 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/BallRajamani-SPIN2000-Fig1.c[718,731] [2021-08-29 16:17:36,833 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 16:17:36,838 INFO L203 MainTranslator]: Completed pre-run [2021-08-29 16:17:36,846 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/BallRajamani-SPIN2000-Fig1.c[718,731] [2021-08-29 16:17:36,847 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 16:17:36,856 INFO L208 MainTranslator]: Completed translation [2021-08-29 16:17:36,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:17:36 WrapperNode [2021-08-29 16:17:36,857 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-29 16:17:36,858 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-29 16:17:36,858 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-29 16:17:36,859 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-29 16:17:36,864 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:17:36" (1/1) ... [2021-08-29 16:17:36,876 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:17:36" (1/1) ... [2021-08-29 16:17:36,899 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-29 16:17:36,900 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-29 16:17:36,900 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-29 16:17:36,900 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-29 16:17:36,913 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:17:36" (1/1) ... [2021-08-29 16:17:36,913 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:17:36" (1/1) ... [2021-08-29 16:17:36,922 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:17:36" (1/1) ... [2021-08-29 16:17:36,922 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:17:36" (1/1) ... [2021-08-29 16:17:36,924 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:17:36" (1/1) ... [2021-08-29 16:17:36,925 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:17:36" (1/1) ... [2021-08-29 16:17:36,926 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:17:36" (1/1) ... [2021-08-29 16:17:36,926 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-29 16:17:36,927 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-29 16:17:36,927 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-29 16:17:36,927 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-29 16:17:36,928 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:17:36" (1/1) ... [2021-08-29 16:17:36,932 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 16:17:36,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:17:36,949 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-29 16:17:36,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-29 16:17:36,992 INFO L130 BoogieDeclarations]: Found specification of procedure A [2021-08-29 16:17:36,993 INFO L138 BoogieDeclarations]: Found implementation of procedure A [2021-08-29 16:17:36,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-29 16:17:36,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-29 16:17:36,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-29 16:17:36,994 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-29 16:17:37,107 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-29 16:17:37,107 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-08-29 16:17:37,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 04:17:37 BoogieIcfgContainer [2021-08-29 16:17:37,108 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-29 16:17:37,109 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-29 16:17:37,109 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-29 16:17:37,111 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-29 16:17:37,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 04:17:36" (1/3) ... [2021-08-29 16:17:37,112 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53ce9083 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 04:17:37, skipping insertion in model container [2021-08-29 16:17:37,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 04:17:36" (2/3) ... [2021-08-29 16:17:37,112 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53ce9083 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 04:17:37, skipping insertion in model container [2021-08-29 16:17:37,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 04:17:37" (3/3) ... [2021-08-29 16:17:37,113 INFO L111 eAbstractionObserver]: Analyzing ICFG BallRajamani-SPIN2000-Fig1.c [2021-08-29 16:17:37,116 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-29 16:17:37,116 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-29 16:17:37,144 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-29 16:17:37,148 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-29 16:17:37,149 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-29 16:17:37,158 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-29 16:17:37,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-29 16:17:37,162 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:17:37,162 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:17:37,162 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:17:37,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:17:37,166 INFO L82 PathProgramCache]: Analyzing trace with hash -103722487, now seen corresponding path program 1 times [2021-08-29 16:17:37,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:17:37,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631281278] [2021-08-29 16:17:37,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:17:37,172 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:17:37,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:17:37,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-29 16:17:37,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:17:37,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-08-29 16:17:37,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:17:37,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-29 16:17:37,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 16:17:37,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631281278] [2021-08-29 16:17:37,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631281278] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 16:17:37,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961924567] [2021-08-29 16:17:37,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:17:37,392 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 16:17:37,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 16:17:37,421 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 16:17:37,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-29 16:17:37,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 16:17:37,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-29 16:17:37,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 16:17:37,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-29 16:17:37,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 16:17:37,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-29 16:17:37,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961924567] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 16:17:37,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 16:17:37,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 7 [2021-08-29 16:17:37,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113911784] [2021-08-29 16:17:37,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-29 16:17:37,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 16:17:37,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-29 16:17:37,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-29 16:17:37,705 INFO L87 Difference]: Start difference. First operand has 18 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-29 16:17:37,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 16:17:37,792 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2021-08-29 16:17:37,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-29 16:17:37,794 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2021-08-29 16:17:37,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 16:17:37,798 INFO L225 Difference]: With dead ends: 39 [2021-08-29 16:17:37,798 INFO L226 Difference]: Without dead ends: 17 [2021-08-29 16:17:37,800 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 50.45ms TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-08-29 16:17:37,802 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 10 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.50ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 52.01ms IncrementalHoareTripleChecker+Time [2021-08-29 16:17:37,803 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 5 Invalid, 113 Unknown, 0 Unchecked, 1.50ms Time], IncrementalHoareTripleChecker [9 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 52.01ms Time] [2021-08-29 16:17:37,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-08-29 16:17:37,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-08-29 16:17:37,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 12 states have internal predecessors, (12), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-08-29 16:17:37,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-08-29 16:17:37,825 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 16 [2021-08-29 16:17:37,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 16:17:37,825 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-08-29 16:17:37,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-29 16:17:37,825 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-08-29 16:17:37,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-29 16:17:37,826 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 16:17:37,827 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 16:17:37,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-29 16:17:38,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-08-29 16:17:38,041 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 16:17:38,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 16:17:38,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1835094219, now seen corresponding path program 1 times [2021-08-29 16:17:38,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 16:17:38,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180724301] [2021-08-29 16:17:38,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 16:17:38,042 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 16:17:38,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-29 16:17:38,061 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-29 16:17:38,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-29 16:17:38,099 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-29 16:17:38,100 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-08-29 16:17:38,101 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-08-29 16:17:38,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-29 16:17:38,110 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-29 16:17:38,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 04:17:38 BoogieIcfgContainer [2021-08-29 16:17:38,146 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-29 16:17:38,147 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-29 16:17:38,147 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-29 16:17:38,147 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-29 16:17:38,147 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 04:17:37" (3/4) ... [2021-08-29 16:17:38,149 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-29 16:17:38,172 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-29 16:17:38,173 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-29 16:17:38,173 INFO L158 Benchmark]: Toolchain (without parser) took 1449.19ms. Allocated memory was 58.7MB in the beginning and 71.3MB in the end (delta: 12.6MB). Free memory was 37.4MB in the beginning and 33.4MB in the end (delta: 4.0MB). Peak memory consumption was 15.3MB. Max. memory is 16.1GB. [2021-08-29 16:17:38,173 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 58.7MB. Free memory was 40.5MB in the beginning and 40.5MB in the end (delta: 44.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 16:17:38,173 INFO L158 Benchmark]: CACSL2BoogieTranslator took 131.79ms. Allocated memory is still 58.7MB. Free memory was 37.2MB in the beginning and 28.1MB in the end (delta: 9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-08-29 16:17:38,174 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.93ms. Allocated memory was 58.7MB in the beginning and 71.3MB in the end (delta: 12.6MB). Free memory was 28.0MB in the beginning and 55.2MB in the end (delta: -27.3MB). Peak memory consumption was 5.0MB. Max. memory is 16.1GB. [2021-08-29 16:17:38,174 INFO L158 Benchmark]: Boogie Preprocessor took 26.84ms. Allocated memory is still 71.3MB. Free memory was 55.2MB in the beginning and 54.3MB in the end (delta: 907.9kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 16:17:38,174 INFO L158 Benchmark]: RCFGBuilder took 180.99ms. Allocated memory is still 71.3MB. Free memory was 54.3MB in the beginning and 46.1MB in the end (delta: 8.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-08-29 16:17:38,174 INFO L158 Benchmark]: TraceAbstraction took 1037.29ms. Allocated memory is still 71.3MB. Free memory was 45.5MB in the beginning and 35.9MB in the end (delta: 9.6MB). Peak memory consumption was 12.3MB. Max. memory is 16.1GB. [2021-08-29 16:17:38,175 INFO L158 Benchmark]: Witness Printer took 25.78ms. Allocated memory is still 71.3MB. Free memory was 35.9MB in the beginning and 33.4MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 16:17:38,179 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 58.7MB. Free memory was 40.5MB in the beginning and 40.5MB in the end (delta: 44.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 131.79ms. Allocated memory is still 58.7MB. Free memory was 37.2MB in the beginning and 28.1MB in the end (delta: 9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 40.93ms. Allocated memory was 58.7MB in the beginning and 71.3MB in the end (delta: 12.6MB). Free memory was 28.0MB in the beginning and 55.2MB in the end (delta: -27.3MB). Peak memory consumption was 5.0MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.84ms. Allocated memory is still 71.3MB. Free memory was 55.2MB in the beginning and 54.3MB in the end (delta: 907.9kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 180.99ms. Allocated memory is still 71.3MB. Free memory was 54.3MB in the beginning and 46.1MB in the end (delta: 8.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * TraceAbstraction took 1037.29ms. Allocated memory is still 71.3MB. Free memory was 45.5MB in the beginning and 35.9MB in the end (delta: 9.6MB). Peak memory consumption was 12.3MB. Max. memory is 16.1GB. * Witness Printer took 25.78ms. Allocated memory is still 71.3MB. Free memory was 35.9MB in the beginning and 33.4MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 33]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L16] int g; VAL [g=0] [L28] int g = __VERIFIER_nondet_int(); [L29] int h = !g; VAL [g=0] [L30] CALL A(g,h) VAL [\old(a1)=-1, \old(a2)=0, \old(g)=0, g=0] [L19] COND TRUE \read(a1) VAL [\old(a1)=-1, \old(a2)=0, \old(g)=0, a1=-1, a2=0, g=0] [L20] CALL A(a2,a1) VAL [\old(a1)=0, \old(a2)=-1, \old(g)=0, g=0] [L19] COND FALSE !(\read(a1)) [L22] g = a2 VAL [\old(a1)=0, \old(a2)=-1, \old(g)=0, a1=0, a2=-1, g=-1] [L20] RET A(a2,a1) VAL [\old(a1)=-1, \old(a2)=0, \old(g)=0, A(a2,a1)=-2, a1=-1, a2=0, g=-1] [L30] RET A(g,h) VAL [g=-1] [L31] CALL A(g,h) VAL [\old(a1)=-1, \old(a2)=0, \old(g)=-1, g=-1] [L19] COND TRUE \read(a1) VAL [\old(a1)=-1, \old(a2)=0, \old(g)=-1, a1=-1, a2=0, g=-1] [L20] CALL A(a2,a1) VAL [\old(a1)=0, \old(a2)=-1, \old(g)=-1, g=-1] [L19] COND FALSE !(\read(a1)) [L22] g = a2 VAL [\old(a1)=0, \old(a2)=-1, \old(g)=-1, a1=0, a2=-1, g=-1] [L20] RET A(a2,a1) VAL [\old(a1)=-1, \old(a2)=0, \old(g)=-1, A(a2,a1)=-4, a1=-1, a2=0, g=-1] [L31] RET A(g,h) VAL [g=-1] [L32] COND TRUE \read(g) VAL [g=-1] [L33] reach_error() VAL [g=-1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 966.21ms, OverallIterations: 2, TraceHistogramMax: 4, EmptinessCheckTime: 6.57ms, AutomataDifference: 124.28ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 0.00ms, InitialAbstractionConstructionTime: 7.25ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 10 SdHoareTripleChecker+Valid, 52.01ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 10 mSDsluCounter, 5 SdHoareTripleChecker+Invalid, 41.68ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 44 mSDsCounter, 9 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 104 IncrementalHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 9 mSolverCounterUnsat, 3 mSDtfsCounter, 104 mSolverCounterSat, 1.50ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 50.45ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, InterpolantAutomatonStates: 9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 12.75ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 12.18ms SsaConstructionTime, 77.11ms SatisfiabilityAnalysisTime, 317.89ms InterpolantComputationTime, 60 NumberOfCodeBlocks, 60 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 45 ConstructedInterpolants, 0 QuantifiedInterpolants, 96 SizeOfPredicates, 1 NumberOfNonLiveVariables, 83 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 3 InterpolantComputations, 0 PerfectInterpolantSequences, 3/12 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! [2021-08-29 16:17:38,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...