./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 f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_11633a43-f9e8-42e9-8928-1bc6622fc788/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_11633a43-f9e8-42e9-8928-1bc6622fc788/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_11633a43-f9e8-42e9-8928-1bc6622fc788/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_11633a43-f9e8-42e9-8928-1bc6622fc788/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/BallRajamani-SPIN2000-Fig1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_11633a43-f9e8-42e9-8928-1bc6622fc788/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_11633a43-f9e8-42e9-8928-1bc6622fc788/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ccae6f392e1d87c0b193f39dee91a5c51306cb93 ......................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 17:07:15,367 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 17:07:15,368 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 17:07:15,375 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 17:07:15,376 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 17:07:15,376 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 17:07:15,377 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 17:07:15,379 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 17:07:15,381 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 17:07:15,381 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 17:07:15,382 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 17:07:15,383 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 17:07:15,383 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 17:07:15,384 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 17:07:15,384 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 17:07:15,385 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 17:07:15,386 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 17:07:15,386 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 17:07:15,388 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 17:07:15,389 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 17:07:15,390 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 17:07:15,391 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 17:07:15,391 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 17:07:15,392 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 17:07:15,394 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 17:07:15,394 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 17:07:15,394 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 17:07:15,394 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 17:07:15,395 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 17:07:15,395 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 17:07:15,396 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 17:07:15,396 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 17:07:15,397 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 17:07:15,397 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 17:07:15,398 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 17:07:15,398 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 17:07:15,399 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 17:07:15,399 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 17:07:15,399 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 17:07:15,400 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 17:07:15,400 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 17:07:15,401 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_11633a43-f9e8-42e9-8928-1bc6622fc788/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-07 17:07:15,414 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 17:07:15,414 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 17:07:15,415 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 17:07:15,415 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 17:07:15,415 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 17:07:15,415 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 17:07:15,416 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 17:07:15,416 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 17:07:15,416 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 17:07:15,416 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 17:07:15,416 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 17:07:15,417 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 17:07:15,417 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 17:07:15,417 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 17:07:15,417 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 17:07:15,417 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 17:07:15,417 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 17:07:15,418 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 17:07:15,418 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 17:07:15,418 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 17:07:15,418 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 17:07:15,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 17:07:15,419 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 17:07:15,419 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 17:07:15,419 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 17:07:15,419 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 17:07:15,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 17:07:15,420 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 17:07:15,420 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 17:07:15,420 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_11633a43-f9e8-42e9-8928-1bc6622fc788/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(__VERIFIER_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 -> ccae6f392e1d87c0b193f39dee91a5c51306cb93 [2019-12-07 17:07:15,524 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 17:07:15,531 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 17:07:15,533 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 17:07:15,534 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 17:07:15,535 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 17:07:15,535 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_11633a43-f9e8-42e9-8928-1bc6622fc788/bin/uautomizer/../../sv-benchmarks/c/recursive/BallRajamani-SPIN2000-Fig1.c [2019-12-07 17:07:15,571 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_11633a43-f9e8-42e9-8928-1bc6622fc788/bin/uautomizer/data/27abdf67d/7f73d437a2ab498281d17ef31b3321a4/FLAGf7cb33e29 [2019-12-07 17:07:15,991 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 17:07:15,992 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_11633a43-f9e8-42e9-8928-1bc6622fc788/sv-benchmarks/c/recursive/BallRajamani-SPIN2000-Fig1.c [2019-12-07 17:07:15,996 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_11633a43-f9e8-42e9-8928-1bc6622fc788/bin/uautomizer/data/27abdf67d/7f73d437a2ab498281d17ef31b3321a4/FLAGf7cb33e29 [2019-12-07 17:07:16,004 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_11633a43-f9e8-42e9-8928-1bc6622fc788/bin/uautomizer/data/27abdf67d/7f73d437a2ab498281d17ef31b3321a4 [2019-12-07 17:07:16,006 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 17:07:16,007 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 17:07:16,008 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 17:07:16,008 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 17:07:16,010 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 17:07:16,011 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 05:07:16" (1/1) ... [2019-12-07 17:07:16,012 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e36ea05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:07:16, skipping insertion in model container [2019-12-07 17:07:16,013 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 05:07:16" (1/1) ... [2019-12-07 17:07:16,017 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 17:07:16,029 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 17:07:16,133 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 17:07:16,136 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 17:07:16,193 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 17:07:16,206 INFO L208 MainTranslator]: Completed translation [2019-12-07 17:07:16,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:07:16 WrapperNode [2019-12-07 17:07:16,206 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 17:07:16,207 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 17:07:16,207 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 17:07:16,207 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 17:07:16,214 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:07:16" (1/1) ... [2019-12-07 17:07:16,217 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:07:16" (1/1) ... [2019-12-07 17:07:16,231 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 17:07:16,231 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 17:07:16,231 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 17:07:16,231 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 17:07:16,239 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:07:16" (1/1) ... [2019-12-07 17:07:16,240 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:07:16" (1/1) ... [2019-12-07 17:07:16,240 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:07:16" (1/1) ... [2019-12-07 17:07:16,240 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:07:16" (1/1) ... [2019-12-07 17:07:16,242 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:07:16" (1/1) ... [2019-12-07 17:07:16,244 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:07:16" (1/1) ... [2019-12-07 17:07:16,245 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:07:16" (1/1) ... [2019-12-07 17:07:16,246 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 17:07:16,246 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 17:07:16,246 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 17:07:16,246 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 17:07:16,247 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:07:16" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11633a43-f9e8-42e9-8928-1bc6622fc788/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 [2019-12-07 17:07:16,287 INFO L130 BoogieDeclarations]: Found specification of procedure A [2019-12-07 17:07:16,288 INFO L138 BoogieDeclarations]: Found implementation of procedure A [2019-12-07 17:07:16,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 17:07:16,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 17:07:16,381 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 17:07:16,381 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-12-07 17:07:16,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 05:07:16 BoogieIcfgContainer [2019-12-07 17:07:16,382 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 17:07:16,383 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 17:07:16,383 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 17:07:16,385 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 17:07:16,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 05:07:16" (1/3) ... [2019-12-07 17:07:16,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21b7adb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 05:07:16, skipping insertion in model container [2019-12-07 17:07:16,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:07:16" (2/3) ... [2019-12-07 17:07:16,386 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21b7adb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 05:07:16, skipping insertion in model container [2019-12-07 17:07:16,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 05:07:16" (3/3) ... [2019-12-07 17:07:16,387 INFO L109 eAbstractionObserver]: Analyzing ICFG BallRajamani-SPIN2000-Fig1.c [2019-12-07 17:07:16,393 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 17:07:16,397 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 17:07:16,405 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 17:07:16,419 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 17:07:16,419 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 17:07:16,419 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 17:07:16,419 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 17:07:16,419 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 17:07:16,419 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 17:07:16,419 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 17:07:16,419 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 17:07:16,429 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-12-07 17:07:16,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-07 17:07:16,433 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:07:16,433 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:07:16,434 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:07:16,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:07:16,438 INFO L82 PathProgramCache]: Analyzing trace with hash -103722487, now seen corresponding path program 1 times [2019-12-07 17:07:16,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:07:16,443 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207033201] [2019-12-07 17:07:16,443 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:07:16,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:07:16,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:07:16,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:07:16,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 17:07:16,609 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207033201] [2019-12-07 17:07:16,610 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416808838] [2019-12-07 17:07:16,610 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11633a43-f9e8-42e9-8928-1bc6622fc788/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 [2019-12-07 17:07:16,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:07:16,640 INFO L264 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-07 17:07:16,644 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:07:16,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 17:07:16,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:07:16,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2019-12-07 17:07:16,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217972771] [2019-12-07 17:07:16,675 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 17:07:16,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:07:16,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 17:07:16,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-12-07 17:07:16,685 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 6 states. [2019-12-07 17:07:16,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:07:16,784 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2019-12-07 17:07:16,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 17:07:16,786 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2019-12-07 17:07:16,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:07:16,794 INFO L225 Difference]: With dead ends: 39 [2019-12-07 17:07:16,794 INFO L226 Difference]: Without dead ends: 17 [2019-12-07 17:07:16,797 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-12-07 17:07:16,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-12-07 17:07:16,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-12-07 17:07:16,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-12-07 17:07:16,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2019-12-07 17:07:16,831 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 16 [2019-12-07 17:07:16,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:07:16,831 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-12-07 17:07:16,831 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 17:07:16,831 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2019-12-07 17:07:16,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-12-07 17:07:16,833 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:07:16,833 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:07:17,033 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:07:17,034 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:07:17,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:07:17,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1835094219, now seen corresponding path program 1 times [2019-12-07 17:07:17,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:07:17,035 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436197485] [2019-12-07 17:07:17,035 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:07:17,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 17:07:17,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 17:07:17,105 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 17:07:17,105 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 17:07:17,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 05:07:17 BoogieIcfgContainer [2019-12-07 17:07:17,125 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 17:07:17,125 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 17:07:17,125 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 17:07:17,125 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 17:07:17,126 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 05:07:16" (3/4) ... [2019-12-07 17:07:17,127 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-12-07 17:07:17,159 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_11633a43-f9e8-42e9-8928-1bc6622fc788/bin/uautomizer/witness.graphml [2019-12-07 17:07:17,160 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 17:07:17,162 INFO L168 Benchmark]: Toolchain (without parser) took 1153.67 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 122.7 MB). Free memory was 948.9 MB in the beginning and 1.0 GB in the end (delta: -92.5 MB). Peak memory consumption was 30.2 MB. Max. memory is 11.5 GB. [2019-12-07 17:07:17,162 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 963.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 17:07:17,163 INFO L168 Benchmark]: CACSL2BoogieTranslator took 198.87 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 122.7 MB). Free memory was 948.9 MB in the beginning and 1.1 GB in the end (delta: -168.6 MB). Peak memory consumption was 24.1 MB. Max. memory is 11.5 GB. [2019-12-07 17:07:17,163 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.19 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 17:07:17,163 INFO L168 Benchmark]: Boogie Preprocessor took 14.61 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 17:07:17,164 INFO L168 Benchmark]: RCFGBuilder took 136.05 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 11.5 GB. [2019-12-07 17:07:17,164 INFO L168 Benchmark]: TraceAbstraction took 742.34 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 54.3 MB). Peak memory consumption was 54.3 MB. Max. memory is 11.5 GB. [2019-12-07 17:07:17,164 INFO L168 Benchmark]: Witness Printer took 34.38 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-12-07 17:07:17,167 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 963.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 198.87 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 122.7 MB). Free memory was 948.9 MB in the beginning and 1.1 GB in the end (delta: -168.6 MB). Peak memory consumption was 24.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 24.19 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 14.61 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 136.05 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 742.34 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 54.3 MB). Peak memory consumption was 54.3 MB. Max. memory is 11.5 GB. * Witness Printer took 34.38 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 31]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int g; VAL [g=0] [L26] int g = __VERIFIER_nondet_int(); [L27] int h = !g; VAL [g=0] [L28] CALL A(g,h) VAL [\old(a1)=1, \old(a2)=0, \old(g)=0, g=0] [L17] COND TRUE \read(a1) VAL [\old(a1)=1, \old(a2)=0, \old(g)=0, a1=1, a2=0, g=0] [L18] CALL A(a2,a1) VAL [\old(a1)=0, \old(a2)=1, \old(g)=0, g=0] [L17] COND FALSE !(\read(a1)) [L20] g = a2 VAL [\old(a1)=0, \old(a2)=1, \old(g)=0, a1=0, a2=1, g=1] [L18] RET A(a2,a1) VAL [\old(a1)=1, \old(a2)=0, \old(g)=0, A(a2,a1)=0, a1=1, a2=0, g=1] [L28] RET A(g,h) VAL [g=1] [L29] CALL A(g,h) VAL [\old(a1)=1, \old(a2)=0, \old(g)=1, g=1] [L17] COND TRUE \read(a1) VAL [\old(a1)=1, \old(a2)=0, \old(g)=1, a1=1, a2=0, g=1] [L18] CALL A(a2,a1) VAL [\old(a1)=0, \old(a2)=1, \old(g)=1, g=1] [L17] COND FALSE !(\read(a1)) [L20] g = a2 VAL [\old(a1)=0, \old(a2)=1, \old(g)=1, a1=0, a2=1, g=1] [L18] RET A(a2,a1) VAL [\old(a1)=1, \old(a2)=0, \old(g)=1, A(a2,a1)=0, a1=1, a2=0, g=1] [L29] RET A(g,h) VAL [g=1] [L30] COND TRUE \read(g) VAL [g=1] [L31] __VERIFIER_error() VAL [g=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 18 locations, 1 error locations. Result: UNSAFE, OverallTime: 0.6s, OverallIterations: 2, TraceHistogramMax: 4, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 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, 19 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred 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, 1650 SizeOfPredicates, 2 NumberOfNonLiveVariables, 54 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, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...