./Ultimate.py --spec /storage/repos/svcomp/c/properties/unreach-call.prp --file /storage/repos/svcomp/c/recursive/BallRajamani-SPIN2000-Fig1_false-unreach-call_true-no-overflow_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0ed9222f Calling Ultimate with: java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/svcomp/c/recursive/BallRajamani-SPIN2000-Fig1_false-unreach-call_true-no-overflow_true-termination.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(__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 0.1.24-0ed9222-m [2019-01-12 14:56:18,340 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-12 14:56:18,341 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-12 14:56:18,353 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-01-12 14:56:18,354 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-01-12 14:56:18,355 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-01-12 14:56:18,356 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-01-12 14:56:18,358 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2019-01-12 14:56:18,359 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-01-12 14:56:18,360 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-01-12 14:56:18,361 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-01-12 14:56:18,361 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-01-12 14:56:18,362 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-01-12 14:56:18,363 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-01-12 14:56:18,364 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-01-12 14:56:18,365 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-01-12 14:56:18,365 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-01-12 14:56:18,367 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-01-12 14:56:18,369 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2019-01-12 14:56:18,371 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-01-12 14:56:18,372 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-01-12 14:56:18,373 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-01-12 14:56:18,376 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-01-12 14:56:18,376 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-01-12 14:56:18,376 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-01-12 14:56:18,377 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-01-12 14:56:18,378 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-01-12 14:56:18,379 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-01-12 14:56:18,380 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2019-01-12 14:56:18,381 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-01-12 14:56:18,382 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2019-01-12 14:56:18,382 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-01-12 14:56:18,383 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-01-12 14:56:18,383 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2019-01-12 14:56:18,384 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2019-01-12 14:56:18,385 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2019-01-12 14:56:18,389 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-01-12 14:56:18,418 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-12 14:56:18,419 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-12 14:56:18,421 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-12 14:56:18,422 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-12 14:56:18,422 INFO L133 SettingsManager]: * Use SBE=true [2019-01-12 14:56:18,422 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-12 14:56:18,422 INFO L133 SettingsManager]: * sizeof long=4 [2019-01-12 14:56:18,423 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-12 14:56:18,423 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-01-12 14:56:18,423 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-12 14:56:18,423 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-01-12 14:56:18,423 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-01-12 14:56:18,423 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-01-12 14:56:18,424 INFO L133 SettingsManager]: * sizeof long double=12 [2019-01-12 14:56:18,424 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-01-12 14:56:18,424 INFO L133 SettingsManager]: * Use constant arrays=true [2019-01-12 14:56:18,424 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-01-12 14:56:18,424 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-12 14:56:18,424 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-12 14:56:18,425 INFO L133 SettingsManager]: * To the following directory=./dump/ [2019-01-12 14:56:18,425 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-01-12 14:56:18,425 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-01-12 14:56:18,425 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-12 14:56:18,425 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-01-12 14:56:18,425 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-01-12 14:56:18,429 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2019-01-12 14:56:18,429 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-01-12 14:56:18,429 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-01-12 14:56:18,429 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true 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(__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 [2019-01-12 14:56:18,473 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-12 14:56:18,493 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-12 14:56:18,497 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-12 14:56:18,498 INFO L271 PluginConnector]: Initializing CDTParser... [2019-01-12 14:56:18,499 INFO L276 PluginConnector]: CDTParser initialized [2019-01-12 14:56:18,499 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/svcomp/c/recursive/BallRajamani-SPIN2000-Fig1_false-unreach-call_true-no-overflow_true-termination.c [2019-01-12 14:56:18,570 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/533233f0d/b6e6c972fa5d4aae860c2f840ab73a40/FLAGf6d366750 [2019-01-12 14:56:18,963 INFO L307 CDTParser]: Found 1 translation units. [2019-01-12 14:56:18,964 INFO L161 CDTParser]: Scanning /storage/repos/svcomp/c/recursive/BallRajamani-SPIN2000-Fig1_false-unreach-call_true-no-overflow_true-termination.c [2019-01-12 14:56:18,970 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/533233f0d/b6e6c972fa5d4aae860c2f840ab73a40/FLAGf6d366750 [2019-01-12 14:56:19,350 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/533233f0d/b6e6c972fa5d4aae860c2f840ab73a40 [2019-01-12 14:56:19,355 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-12 14:56:19,357 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-01-12 14:56:19,358 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-01-12 14:56:19,358 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-01-12 14:56:19,363 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2019-01-12 14:56:19,364 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.01 02:56:19" (1/1) ... [2019-01-12 14:56:19,369 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79b6e4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 02:56:19, skipping insertion in model container [2019-01-12 14:56:19,369 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.01 02:56:19" (1/1) ... [2019-01-12 14:56:19,379 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-01-12 14:56:19,400 INFO L176 MainTranslator]: Built tables and reachable declarations [2019-01-12 14:56:19,622 INFO L208 PostProcessor]: Analyzing one entry point: main [2019-01-12 14:56:19,629 INFO L191 MainTranslator]: Completed pre-run [2019-01-12 14:56:19,647 INFO L208 PostProcessor]: Analyzing one entry point: main [2019-01-12 14:56:19,660 INFO L195 MainTranslator]: Completed translation [2019-01-12 14:56:19,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 02:56:19 WrapperNode [2019-01-12 14:56:19,661 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-01-12 14:56:19,661 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-01-12 14:56:19,662 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-01-12 14:56:19,662 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-01-12 14:56:19,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 02:56:19" (1/1) ... [2019-01-12 14:56:19,675 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 02:56:19" (1/1) ... [2019-01-12 14:56:19,692 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-01-12 14:56:19,693 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-12 14:56:19,693 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-12 14:56:19,693 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-12 14:56:19,703 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 02:56:19" (1/1) ... [2019-01-12 14:56:19,704 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 02:56:19" (1/1) ... [2019-01-12 14:56:19,704 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 02:56:19" (1/1) ... [2019-01-12 14:56:19,705 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 02:56:19" (1/1) ... [2019-01-12 14:56:19,710 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 02:56:19" (1/1) ... [2019-01-12 14:56:19,712 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 02:56:19" (1/1) ... [2019-01-12 14:56:19,713 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 02:56:19" (1/1) ... [2019-01-12 14:56:19,714 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-12 14:56:19,715 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-12 14:56:19,716 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-12 14:56:19,716 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-12 14:56:19,717 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 02:56:19" (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 [2019-01-12 14:56:19,841 INFO L130 BoogieDeclarations]: Found specification of procedure A [2019-01-12 14:56:19,841 INFO L138 BoogieDeclarations]: Found implementation of procedure A [2019-01-12 14:56:19,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-01-12 14:56:19,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-01-12 14:56:20,041 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-01-12 14:56:20,042 INFO L286 CfgBuilder]: Removed 4 assue(true) statements. [2019-01-12 14:56:20,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.01 02:56:20 BoogieIcfgContainer [2019-01-12 14:56:20,043 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-12 14:56:20,044 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-01-12 14:56:20,044 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-01-12 14:56:20,047 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-01-12 14:56:20,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.01 02:56:19" (1/3) ... [2019-01-12 14:56:20,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8be5b97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.01 02:56:20, skipping insertion in model container [2019-01-12 14:56:20,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 02:56:19" (2/3) ... [2019-01-12 14:56:20,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8be5b97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.01 02:56:20, skipping insertion in model container [2019-01-12 14:56:20,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.01 02:56:20" (3/3) ... [2019-01-12 14:56:20,051 INFO L112 eAbstractionObserver]: Analyzing ICFG BallRajamani-SPIN2000-Fig1_false-unreach-call_true-no-overflow_true-termination.c [2019-01-12 14:56:20,061 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-01-12 14:56:20,069 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-01-12 14:56:20,085 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-01-12 14:56:20,115 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2019-01-12 14:56:20,116 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-01-12 14:56:20,116 INFO L383 AbstractCegarLoop]: Hoare is true [2019-01-12 14:56:20,116 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-01-12 14:56:20,116 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-01-12 14:56:20,116 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-01-12 14:56:20,116 INFO L387 AbstractCegarLoop]: Difference is false [2019-01-12 14:56:20,116 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-01-12 14:56:20,117 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-01-12 14:56:20,134 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-01-12 14:56:20,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-01-12 14:56:20,140 INFO L394 BasicCegarLoop]: Found error trace [2019-01-12 14:56:20,141 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-01-12 14:56:20,143 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-01-12 14:56:20,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-12 14:56:20,150 INFO L82 PathProgramCache]: Analyzing trace with hash -103722487, now seen corresponding path program 1 times [2019-01-12 14:56:20,152 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-12 14:56:20,152 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-12 14:56:20,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-12 14:56:20,194 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-12 14:56:20,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-12 14:56:20,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-12 14:56:20,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-12 14:56:20,551 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-01-12 14:56:20,551 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-01-12 14:56:20,567 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-12 14:56:20,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-12 14:56:20,598 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2019-01-12 14:56:20,677 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-01-12 14:56:20,698 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-01-12 14:56:20,699 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2019-01-12 14:56:20,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-01-12 14:56:20,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-01-12 14:56:20,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-01-12 14:56:20,716 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 5 states. [2019-01-12 14:56:21,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-12 14:56:21,175 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2019-01-12 14:56:21,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-01-12 14:56:21,177 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2019-01-12 14:56:21,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-12 14:56:21,186 INFO L225 Difference]: With dead ends: 39 [2019-01-12 14:56:21,186 INFO L226 Difference]: Without dead ends: 17 [2019-01-12 14:56:21,190 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-01-12 14:56:21,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-01-12 14:56:21,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-01-12 14:56:21,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-01-12 14:56:21,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2019-01-12 14:56:21,232 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 16 [2019-01-12 14:56:21,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-12 14:56:21,232 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-01-12 14:56:21,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-01-12 14:56:21,233 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2019-01-12 14:56:21,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-01-12 14:56:21,235 INFO L394 BasicCegarLoop]: Found error trace [2019-01-12 14:56:21,235 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-01-12 14:56:21,235 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-01-12 14:56:21,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-12 14:56:21,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1835094219, now seen corresponding path program 1 times [2019-01-12 14:56:21,236 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-12 14:56:21,236 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-12 14:56:21,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-12 14:56:21,238 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-12 14:56:21,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-12 14:56:21,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-01-12 14:56:21,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-01-12 14:56:21,318 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2019-01-12 14:56:21,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.01 02:56:21 BoogieIcfgContainer [2019-01-12 14:56:21,350 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-01-12 14:56:21,351 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-01-12 14:56:21,351 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-01-12 14:56:21,351 INFO L276 PluginConnector]: Witness Printer initialized [2019-01-12 14:56:21,352 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.01 02:56:20" (3/4) ... [2019-01-12 14:56:21,354 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2019-01-12 14:56:21,409 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-01-12 14:56:21,409 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-01-12 14:56:21,410 INFO L168 Benchmark]: Toolchain (without parser) took 2054.44 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 114.8 MB). Free memory was 951.4 MB in the beginning and 1.0 GB in the end (delta: -91.0 MB). Peak memory consumption was 23.9 MB. Max. memory is 11.5 GB. [2019-01-12 14:56:21,412 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-01-12 14:56:21,413 INFO L168 Benchmark]: CACSL2BoogieTranslator took 302.98 ms. Allocated memory is still 1.0 GB. Free memory was 951.4 MB in the beginning and 940.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-01-12 14:56:21,413 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.03 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-01-12 14:56:21,414 INFO L168 Benchmark]: Boogie Preprocessor took 21.67 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-01-12 14:56:21,414 INFO L168 Benchmark]: RCFGBuilder took 327.91 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 114.8 MB). Free memory was 940.6 MB in the beginning and 1.1 GB in the end (delta: -149.0 MB). Peak memory consumption was 12.8 MB. Max. memory is 11.5 GB. [2019-01-12 14:56:21,415 INFO L168 Benchmark]: TraceAbstraction took 1306.54 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 47.3 MB). Peak memory consumption was 47.3 MB. Max. memory is 11.5 GB. [2019-01-12 14:56:21,416 INFO L168 Benchmark]: Witness Printer took 58.13 ms. Allocated memory is still 1.1 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-01-12 14:56:21,420 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 302.98 ms. Allocated memory is still 1.0 GB. Free memory was 951.4 MB in the beginning and 940.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 31.03 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 21.67 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 327.91 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 114.8 MB). Free memory was 940.6 MB in the beginning and 1.1 GB in the end (delta: -149.0 MB). Peak memory consumption was 12.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1306.54 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 47.3 MB). Peak memory consumption was 47.3 MB. Max. memory is 11.5 GB. * Witness Printer took 58.13 ms. Allocated memory is still 1.1 GB. Free memory is still 1.0 GB. There was no memory consumed. 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)=2, \old(a2)=0, \old(g)=0, g=0] [L17] COND TRUE \read(a1) VAL [\old(a1)=2, \old(a2)=0, \old(g)=0, a1=2, a2=0, g=0] [L18] CALL A(a2,a1) VAL [\old(a1)=0, \old(a2)=2, \old(g)=0, g=0] [L17] COND FALSE !(\read(a1)) [L20] g = a2 VAL [\old(a1)=0, \old(a2)=2, \old(g)=0, a1=0, a2=2, g=2] [L18] RET A(a2,a1) VAL [\old(a1)=2, \old(a2)=0, \old(g)=0, A(a2,a1)=0, a1=2, a2=0, g=2] [L28] RET A(g,h) VAL [g=2] [L29] CALL A(g,h) VAL [\old(a1)=2, \old(a2)=0, \old(g)=2, g=2] [L17] COND TRUE \read(a1) VAL [\old(a1)=2, \old(a2)=0, \old(g)=2, a1=2, a2=0, g=2] [L18] CALL A(a2,a1) VAL [\old(a1)=0, \old(a2)=2, \old(g)=2, g=2] [L17] COND FALSE !(\read(a1)) [L20] g = a2 VAL [\old(a1)=0, \old(a2)=2, \old(g)=2, a1=0, a2=2, g=2] [L18] RET A(a2,a1) VAL [\old(a1)=2, \old(a2)=0, \old(g)=2, A(a2,a1)=0, a1=2, a2=0, g=2] [L29] RET A(g,h) VAL [g=2] [L30] COND TRUE \read(g) VAL [g=2] [L31] __VERIFIER_error() VAL [g=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 18 locations, 1 error locations. UNSAFE Result, 1.2s OverallTime, 2 OverallIterations, 4 TraceHistogramMax, 0.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 14 SDtfs, 9 SDslu, 27 SDs, 0 SdLazy, 36 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s 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 AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 60 NumberOfCodeBlocks, 60 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 30 ConstructedInterpolants, 0 QuantifiedInterpolants, 1950 SizeOfPredicates, 2 NumberOfNonLiveVariables, 54 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 2 InterpolantComputations, 0 PerfectInterpolantSequences, 2/8 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...