./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 a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_4bea6803-f844-4fed-af00-64359206db69/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_4bea6803-f844-4fed-af00-64359206db69/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_4bea6803-f844-4fed-af00-64359206db69/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_4bea6803-f844-4fed-af00-64359206db69/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/BallRajamani-SPIN2000-Fig1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_4bea6803-f844-4fed-af00-64359206db69/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_4bea6803-f844-4fed-af00-64359206db69/bin/uautomizer --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 0.2.0-a4ecdab [2020-11-28 02:58:02,787 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 02:58:02,789 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 02:58:02,845 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 02:58:02,846 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 02:58:02,852 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 02:58:02,856 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 02:58:02,864 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 02:58:02,867 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 02:58:02,869 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 02:58:02,870 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 02:58:02,874 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 02:58:02,875 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 02:58:02,883 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 02:58:02,885 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 02:58:02,887 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 02:58:02,888 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 02:58:02,894 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 02:58:02,896 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 02:58:02,898 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 02:58:02,900 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 02:58:02,904 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 02:58:02,905 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 02:58:02,907 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 02:58:02,913 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 02:58:02,916 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 02:58:02,917 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 02:58:02,919 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 02:58:02,920 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 02:58:02,921 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 02:58:02,921 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 02:58:02,923 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 02:58:02,924 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 02:58:02,926 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 02:58:02,927 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 02:58:02,928 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 02:58:02,928 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 02:58:02,929 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 02:58:02,929 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 02:58:02,930 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 02:58:02,931 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 02:58:02,933 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_4bea6803-f844-4fed-af00-64359206db69/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-28 02:58:02,978 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 02:58:02,982 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 02:58:02,984 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 02:58:02,984 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 02:58:02,985 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 02:58:02,985 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 02:58:02,985 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 02:58:02,985 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 02:58:02,986 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 02:58:02,986 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 02:58:02,987 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 02:58:02,987 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 02:58:02,988 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 02:58:02,988 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 02:58:02,988 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 02:58:02,988 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 02:58:02,988 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 02:58:02,989 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 02:58:02,989 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 02:58:02,989 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 02:58:02,989 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 02:58:02,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 02:58:02,990 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 02:58:02,990 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 02:58:02,990 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 02:58:02,991 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 02:58:02,991 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 02:58:02,991 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 02:58:02,991 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 02:58:02,992 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_4bea6803-f844-4fed-af00-64359206db69/bin/uautomizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_4bea6803-f844-4fed-af00-64359206db69/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dc0ee77d2c77f6a72f7fe76138da8c8b9afd4553 [2020-11-28 02:58:03,236 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 02:58:03,274 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 02:58:03,278 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 02:58:03,279 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 02:58:03,280 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 02:58:03,281 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_4bea6803-f844-4fed-af00-64359206db69/bin/uautomizer/../../sv-benchmarks/c/recursive/BallRajamani-SPIN2000-Fig1.c [2020-11-28 02:58:03,346 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4bea6803-f844-4fed-af00-64359206db69/bin/uautomizer/data/dc2796407/96462324d3ab41bdadcbe6b176ba1bb2/FLAG7a5a82dc8 [2020-11-28 02:58:03,792 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 02:58:03,792 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_4bea6803-f844-4fed-af00-64359206db69/sv-benchmarks/c/recursive/BallRajamani-SPIN2000-Fig1.c [2020-11-28 02:58:03,797 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4bea6803-f844-4fed-af00-64359206db69/bin/uautomizer/data/dc2796407/96462324d3ab41bdadcbe6b176ba1bb2/FLAG7a5a82dc8 [2020-11-28 02:58:04,184 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_4bea6803-f844-4fed-af00-64359206db69/bin/uautomizer/data/dc2796407/96462324d3ab41bdadcbe6b176ba1bb2 [2020-11-28 02:58:04,186 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 02:58:04,187 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 02:58:04,189 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 02:58:04,189 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 02:58:04,193 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 02:58:04,194 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:58:04" (1/1) ... [2020-11-28 02:58:04,196 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1891538e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:04, skipping insertion in model container [2020-11-28 02:58:04,197 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:58:04" (1/1) ... [2020-11-28 02:58:04,205 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 02:58:04,219 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 02:58:04,367 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 02:58:04,375 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 02:58:04,389 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 02:58:04,402 INFO L208 MainTranslator]: Completed translation [2020-11-28 02:58:04,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:04 WrapperNode [2020-11-28 02:58:04,403 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 02:58:04,404 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 02:58:04,404 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 02:58:04,404 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 02:58:04,412 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:04" (1/1) ... [2020-11-28 02:58:04,419 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:04" (1/1) ... [2020-11-28 02:58:04,434 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 02:58:04,435 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 02:58:04,435 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 02:58:04,435 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 02:58:04,443 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:04" (1/1) ... [2020-11-28 02:58:04,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:04" (1/1) ... [2020-11-28 02:58:04,445 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:04" (1/1) ... [2020-11-28 02:58:04,445 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:04" (1/1) ... [2020-11-28 02:58:04,448 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:04" (1/1) ... [2020-11-28 02:58:04,450 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:04" (1/1) ... [2020-11-28 02:58:04,451 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:04" (1/1) ... [2020-11-28 02:58:04,452 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 02:58:04,453 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 02:58:04,453 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 02:58:04,454 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 02:58:04,454 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:04" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4bea6803-f844-4fed-af00-64359206db69/bin/uautomizer/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 [2020-11-28 02:58:04,513 INFO L130 BoogieDeclarations]: Found specification of procedure A [2020-11-28 02:58:04,513 INFO L138 BoogieDeclarations]: Found implementation of procedure A [2020-11-28 02:58:04,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 02:58:04,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 02:58:04,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 02:58:04,514 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 02:58:04,825 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 02:58:04,826 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-28 02:58:04,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:58:04 BoogieIcfgContainer [2020-11-28 02:58:04,827 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 02:58:04,834 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 02:58:04,834 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 02:58:04,837 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 02:58:04,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 02:58:04" (1/3) ... [2020-11-28 02:58:04,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17222459 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:58:04, skipping insertion in model container [2020-11-28 02:58:04,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:04" (2/3) ... [2020-11-28 02:58:04,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17222459 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:58:04, skipping insertion in model container [2020-11-28 02:58:04,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:58:04" (3/3) ... [2020-11-28 02:58:04,840 INFO L111 eAbstractionObserver]: Analyzing ICFG BallRajamani-SPIN2000-Fig1.c [2020-11-28 02:58:04,848 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 02:58:04,852 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 02:58:04,860 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 02:58:04,880 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 02:58:04,881 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 02:58:04,881 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 02:58:04,881 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 02:58:04,881 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 02:58:04,881 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 02:58:04,882 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 02:58:04,882 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 02:58:04,896 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-11-28 02:58:04,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-28 02:58:04,902 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:04,904 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:58:04,904 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:58:04,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:04,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1977813505, now seen corresponding path program 1 times [2020-11-28 02:58:04,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:04,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991082329] [2020-11-28 02:58:04,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:05,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:05,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 02:58:05,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:05,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-28 02:58:05,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:05,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 02:58:05,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991082329] [2020-11-28 02:58:05,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432498782] [2020-11-28 02:58:05,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4bea6803-f844-4fed-af00-64359206db69/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:05,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:05,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 02:58:05,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:05,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 02:58:05,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 02:58:05,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2020-11-28 02:58:05,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121528405] [2020-11-28 02:58:05,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 02:58:05,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:05,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 02:58:05,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-28 02:58:05,318 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 6 states. [2020-11-28 02:58:05,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:05,509 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2020-11-28 02:58:05,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-28 02:58:05,511 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-11-28 02:58:05,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:05,521 INFO L225 Difference]: With dead ends: 40 [2020-11-28 02:58:05,521 INFO L226 Difference]: Without dead ends: 17 [2020-11-28 02:58:05,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-11-28 02:58:05,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-11-28 02:58:05,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-11-28 02:58:05,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-28 02:58:05,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-11-28 02:58:05,558 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 16 [2020-11-28 02:58:05,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:05,558 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-11-28 02:58:05,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 02:58:05,559 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-11-28 02:58:05,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-28 02:58:05,561 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:05,561 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:58:05,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-11-28 02:58:05,772 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:58:05,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:05,773 INFO L82 PathProgramCache]: Analyzing trace with hash -528523467, now seen corresponding path program 1 times [2020-11-28 02:58:05,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:05,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586413345] [2020-11-28 02:58:05,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:05,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:05,803 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:05,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:05,829 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:05,855 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 02:58:05,855 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 02:58:05,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 02:58:05,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 02:58:05 BoogieIcfgContainer [2020-11-28 02:58:05,894 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 02:58:05,895 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 02:58:05,895 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 02:58:05,895 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 02:58:05,896 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:58:04" (3/4) ... [2020-11-28 02:58:05,898 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 02:58:05,946 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_4bea6803-f844-4fed-af00-64359206db69/bin/uautomizer/witness.graphml [2020-11-28 02:58:05,946 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 02:58:05,948 INFO L168 Benchmark]: Toolchain (without parser) took 1760.43 ms. Allocated memory is still 127.9 MB. Free memory was 95.1 MB in the beginning and 38.0 MB in the end (delta: 57.0 MB). Peak memory consumption was 53.8 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:05,949 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 73.4 MB. Free memory was 31.2 MB in the beginning and 31.2 MB in the end (delta: 63.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 02:58:05,950 INFO L168 Benchmark]: CACSL2BoogieTranslator took 214.19 ms. Allocated memory is still 127.9 MB. Free memory was 95.1 MB in the beginning and 103.7 MB in the end (delta: -8.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:05,951 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.77 ms. Allocated memory is still 127.9 MB. Free memory was 103.7 MB in the beginning and 102.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:05,951 INFO L168 Benchmark]: Boogie Preprocessor took 17.34 ms. Allocated memory is still 127.9 MB. Free memory was 102.3 MB in the beginning and 101.6 MB in the end (delta: 729.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 02:58:05,952 INFO L168 Benchmark]: RCFGBuilder took 374.40 ms. Allocated memory is still 127.9 MB. Free memory was 101.6 MB in the beginning and 89.7 MB in the end (delta: 11.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:05,953 INFO L168 Benchmark]: TraceAbstraction took 1060.62 ms. Allocated memory is still 127.9 MB. Free memory was 89.7 MB in the beginning and 40.7 MB in the end (delta: 49.0 MB). Peak memory consumption was 48.2 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:05,953 INFO L168 Benchmark]: Witness Printer took 51.59 ms. Allocated memory is still 127.9 MB. Free memory was 40.7 MB in the beginning and 38.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:05,957 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 73.4 MB. Free memory was 31.2 MB in the beginning and 31.2 MB in the end (delta: 63.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 214.19 ms. Allocated memory is still 127.9 MB. Free memory was 95.1 MB in the beginning and 103.7 MB in the end (delta: -8.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 30.77 ms. Allocated memory is still 127.9 MB. Free memory was 103.7 MB in the beginning and 102.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 17.34 ms. Allocated memory is still 127.9 MB. Free memory was 102.3 MB in the beginning and 101.6 MB in the end (delta: 729.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 374.40 ms. Allocated memory is still 127.9 MB. Free memory was 101.6 MB in the beginning and 89.7 MB in the end (delta: 11.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1060.62 ms. Allocated memory is still 127.9 MB. Free memory was 89.7 MB in the beginning and 40.7 MB in the end (delta: 49.0 MB). Peak memory consumption was 48.2 MB. Max. memory is 16.1 GB. * Witness Printer took 51.59 ms. Allocated memory is still 127.9 MB. Free memory was 40.7 MB in the beginning and 38.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_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] [L3] __assert_fail("0", "BallRajamani-SPIN2000-Fig1.c", 3, "reach_error") VAL [g=-1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 4, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 14 SDtfs, 10 SDslu, 36 SDs, 0 SdLazy, 44 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 60 NumberOfCodeBlocks, 60 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 30 ConstructedInterpolants, 0 QuantifiedInterpolants, 930 SizeOfPredicates, 1 NumberOfNonLiveVariables, 83 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 2 InterpolantComputations, 0 PerfectInterpolantSequences, 2/8 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...