./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 54858612 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 0.2.0-5485861 [2020-10-25 23:09:06,849 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-25 23:09:06,852 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-25 23:09:06,905 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-25 23:09:06,906 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-25 23:09:06,912 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-25 23:09:06,915 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-25 23:09:06,922 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-25 23:09:06,925 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-25 23:09:06,932 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-25 23:09:06,933 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-25 23:09:06,939 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-25 23:09:06,939 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-25 23:09:06,943 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-25 23:09:06,945 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-25 23:09:06,946 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-25 23:09:06,947 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-25 23:09:06,951 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-25 23:09:06,955 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-25 23:09:06,963 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-25 23:09:06,965 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-25 23:09:06,966 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-25 23:09:06,968 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-25 23:09:06,970 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-25 23:09:06,979 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-25 23:09:06,980 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-25 23:09:06,980 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-25 23:09:06,982 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-25 23:09:06,983 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-25 23:09:06,984 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-25 23:09:06,984 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-25 23:09:06,985 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-25 23:09:06,988 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-25 23:09:06,989 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-25 23:09:06,996 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-25 23:09:06,996 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-25 23:09:06,997 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-25 23:09:06,998 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-25 23:09:06,998 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-25 23:09:07,000 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-25 23:09:07,003 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-25 23:09:07,005 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-25 23:09:07,060 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-25 23:09:07,061 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-25 23:09:07,064 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-25 23:09:07,066 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-25 23:09:07,066 INFO L138 SettingsManager]: * Use SBE=true [2020-10-25 23:09:07,066 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-25 23:09:07,067 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-25 23:09:07,067 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-25 23:09:07,067 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-25 23:09:07,068 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-25 23:09:07,069 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-25 23:09:07,069 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-25 23:09:07,069 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-25 23:09:07,070 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-25 23:09:07,070 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-25 23:09:07,070 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-25 23:09:07,070 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-25 23:09:07,071 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-25 23:09:07,071 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-25 23:09:07,071 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-25 23:09:07,072 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-25 23:09:07,072 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 23:09:07,072 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-25 23:09:07,073 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-25 23:09:07,073 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-25 23:09:07,073 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-25 23:09:07,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-25 23:09:07,074 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-25 23:09:07,074 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-25 23:09:07,074 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dc0ee77d2c77f6a72f7fe76138da8c8b9afd4553 [2020-10-25 23:09:07,568 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-25 23:09:07,601 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-25 23:09:07,604 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-25 23:09:07,606 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-25 23:09:07,607 INFO L275 PluginConnector]: CDTParser initialized [2020-10-25 23:09:07,608 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/BallRajamani-SPIN2000-Fig1.c [2020-10-25 23:09:07,698 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/541767545/db3c492ddd994870a2f6e9719d1d2087/FLAGd168c1fcf [2020-10-25 23:09:08,308 INFO L306 CDTParser]: Found 1 translation units. [2020-10-25 23:09:08,309 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/BallRajamani-SPIN2000-Fig1.c [2020-10-25 23:09:08,316 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/541767545/db3c492ddd994870a2f6e9719d1d2087/FLAGd168c1fcf [2020-10-25 23:09:08,680 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/541767545/db3c492ddd994870a2f6e9719d1d2087 [2020-10-25 23:09:08,683 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-25 23:09:08,690 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-25 23:09:08,693 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-25 23:09:08,694 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-25 23:09:08,698 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-25 23:09:08,699 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 11:09:08" (1/1) ... [2020-10-25 23:09:08,703 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@117acc34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:09:08, skipping insertion in model container [2020-10-25 23:09:08,704 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 11:09:08" (1/1) ... [2020-10-25 23:09:08,712 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-25 23:09:08,729 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-25 23:09:08,927 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 23:09:08,939 INFO L203 MainTranslator]: Completed pre-run [2020-10-25 23:09:08,957 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 23:09:08,974 INFO L208 MainTranslator]: Completed translation [2020-10-25 23:09:08,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:09:08 WrapperNode [2020-10-25 23:09:08,975 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-25 23:09:08,977 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-25 23:09:08,977 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-25 23:09:08,977 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-25 23:09:08,987 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:09:08" (1/1) ... [2020-10-25 23:09:08,995 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:09:08" (1/1) ... [2020-10-25 23:09:09,014 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-25 23:09:09,015 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-25 23:09:09,015 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-25 23:09:09,016 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-25 23:09:09,026 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:09:08" (1/1) ... [2020-10-25 23:09:09,026 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:09:08" (1/1) ... [2020-10-25 23:09:09,028 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:09:08" (1/1) ... [2020-10-25 23:09:09,028 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:09:08" (1/1) ... [2020-10-25 23:09:09,032 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:09:08" (1/1) ... [2020-10-25 23:09:09,034 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:09:08" (1/1) ... [2020-10-25 23:09:09,035 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:09:08" (1/1) ... [2020-10-25 23:09:09,037 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-25 23:09:09,038 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-25 23:09:09,038 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-25 23:09:09,038 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-25 23:09:09,039 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:09:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-25 23:09:09,117 INFO L130 BoogieDeclarations]: Found specification of procedure A [2020-10-25 23:09:09,117 INFO L138 BoogieDeclarations]: Found implementation of procedure A [2020-10-25 23:09:09,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-25 23:09:09,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-25 23:09:09,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-25 23:09:09,118 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-25 23:09:09,415 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-25 23:09:09,415 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-25 23:09:09,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 11:09:09 BoogieIcfgContainer [2020-10-25 23:09:09,417 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-25 23:09:09,419 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-25 23:09:09,419 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-25 23:09:09,428 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-25 23:09:09,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 11:09:08" (1/3) ... [2020-10-25 23:09:09,429 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@480cc035 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 11:09:09, skipping insertion in model container [2020-10-25 23:09:09,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:09:08" (2/3) ... [2020-10-25 23:09:09,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@480cc035 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 11:09:09, skipping insertion in model container [2020-10-25 23:09:09,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 11:09:09" (3/3) ... [2020-10-25 23:09:09,433 INFO L111 eAbstractionObserver]: Analyzing ICFG BallRajamani-SPIN2000-Fig1.c [2020-10-25 23:09:09,445 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-25 23:09:09,450 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-25 23:09:09,464 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-25 23:09:09,493 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-25 23:09:09,493 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-25 23:09:09,493 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-25 23:09:09,493 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-25 23:09:09,493 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-25 23:09:09,494 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-25 23:09:09,494 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-25 23:09:09,494 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-25 23:09:09,514 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-10-25 23:09:09,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-25 23:09:09,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:09:09,522 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:09:09,522 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:09:09,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:09:09,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1977813505, now seen corresponding path program 1 times [2020-10-25 23:09:09,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:09:09,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308528968] [2020-10-25 23:09:09,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:09:09,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:09:09,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:09:09,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:09:09,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-25 23:09:09,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:09:09,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-25 23:09:09,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308528968] [2020-10-25 23:09:09,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505981528] [2020-10-25 23:09:09,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-25 23:09:09,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:09:09,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-25 23:09:09,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 23:09:09,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-25 23:09:09,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 23:09:09,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2020-10-25 23:09:09,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782523972] [2020-10-25 23:09:09,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-25 23:09:09,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:09:10,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-25 23:09:10,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-25 23:09:10,012 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 6 states. [2020-10-25 23:09:10,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:09:10,228 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2020-10-25 23:09:10,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-25 23:09:10,230 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-25 23:09:10,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:09:10,240 INFO L225 Difference]: With dead ends: 40 [2020-10-25 23:09:10,240 INFO L226 Difference]: Without dead ends: 17 [2020-10-25 23:09:10,244 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 [2020-10-25 23:09:10,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-25 23:09:10,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-25 23:09:10,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-25 23:09:10,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-10-25 23:09:10,289 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 16 [2020-10-25 23:09:10,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:09:10,290 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-10-25 23:09:10,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-25 23:09:10,291 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-10-25 23:09:10,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-25 23:09:10,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:09:10,293 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:09:10,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-10-25 23:09:10,502 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:09:10,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:09:10,505 INFO L82 PathProgramCache]: Analyzing trace with hash -528523467, now seen corresponding path program 1 times [2020-10-25 23:09:10,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:09:10,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150294725] [2020-10-25 23:09:10,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:09:10,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 23:09:10,539 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 23:09:10,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 23:09:10,568 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 23:09:10,599 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-25 23:09:10,599 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-25 23:09:10,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-25 23:09:10,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 11:09:10 BoogieIcfgContainer [2020-10-25 23:09:10,647 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-25 23:09:10,648 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-25 23:09:10,648 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-25 23:09:10,649 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-25 23:09:10,649 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 11:09:09" (3/4) ... [2020-10-25 23:09:10,652 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-25 23:09:10,725 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-25 23:09:10,725 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-25 23:09:10,728 INFO L168 Benchmark]: Toolchain (without parser) took 2041.76 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 25.7 MB in the beginning and 25.0 MB in the end (delta: 642.3 kB). Peak memory consumption was 14.0 MB. Max. memory is 16.1 GB. [2020-10-25 23:09:10,730 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 39.8 MB. Free memory was 23.5 MB in the beginning and 23.4 MB in the end (delta: 42.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 23:09:10,731 INFO L168 Benchmark]: CACSL2BoogieTranslator took 282.38 ms. Allocated memory is still 48.2 MB. Free memory was 25.0 MB in the beginning and 27.2 MB in the end (delta: -2.2 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. [2020-10-25 23:09:10,732 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.06 ms. Allocated memory is still 48.2 MB. Free memory was 27.2 MB in the beginning and 25.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 23:09:10,733 INFO L168 Benchmark]: Boogie Preprocessor took 21.96 ms. Allocated memory is still 48.2 MB. Free memory was 25.8 MB in the beginning and 24.9 MB in the end (delta: 940.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 23:09:10,734 INFO L168 Benchmark]: RCFGBuilder took 378.99 ms. Allocated memory is still 48.2 MB. Free memory was 24.9 MB in the beginning and 25.3 MB in the end (delta: -435.7 kB). Peak memory consumption was 7.4 MB. Max. memory is 16.1 GB. [2020-10-25 23:09:10,735 INFO L168 Benchmark]: TraceAbstraction took 1228.85 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 24.7 MB in the beginning and 27.9 MB in the end (delta: -3.1 MB). Peak memory consumption was 7.4 MB. Max. memory is 16.1 GB. [2020-10-25 23:09:10,736 INFO L168 Benchmark]: Witness Printer took 77.02 ms. Allocated memory is still 58.7 MB. Free memory was 27.9 MB in the beginning and 25.0 MB in the end (delta: 2.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-10-25 23:09:10,742 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 39.8 MB. Free memory was 23.5 MB in the beginning and 23.4 MB in the end (delta: 42.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 282.38 ms. Allocated memory is still 48.2 MB. Free memory was 25.0 MB in the beginning and 27.2 MB in the end (delta: -2.2 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.06 ms. Allocated memory is still 48.2 MB. Free memory was 27.2 MB in the beginning and 25.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.96 ms. Allocated memory is still 48.2 MB. Free memory was 25.8 MB in the beginning and 24.9 MB in the end (delta: 940.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 378.99 ms. Allocated memory is still 48.2 MB. Free memory was 24.9 MB in the beginning and 25.3 MB in the end (delta: -435.7 kB). Peak memory consumption was 7.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1228.85 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 24.7 MB in the beginning and 27.9 MB in the end (delta: -3.1 MB). Peak memory consumption was 7.4 MB. Max. memory is 16.1 GB. * Witness Printer took 77.02 ms. Allocated memory is still 58.7 MB. Free memory was 27.9 MB in the beginning and 25.0 MB in the end (delta: 2.8 MB). Peak memory consumption was 4.2 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: 1.1s, 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, 0.1s 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...