./Ultimate.py --spec /storage/repos/svcomp/c/properties/unreach-call.prp --file /storage/repos/svcomp/c/recursive-simple/id2_b3_o2_false-unreach-call_true-termination_true-no-overflow.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2e94e6aa 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-simple/id2_b3_o2_false-unreach-call_true-termination_true-no-overflow.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 a033d09eab07f8bc6e49bb4301ebd6c89110f535 ...................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.1.24-2e94e6a [2018-12-31 09:54:13,748 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-31 09:54:13,751 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-31 09:54:13,764 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-31 09:54:13,765 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-31 09:54:13,766 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-31 09:54:13,768 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-31 09:54:13,770 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-31 09:54:13,771 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-31 09:54:13,772 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-31 09:54:13,773 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-31 09:54:13,773 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-31 09:54:13,775 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-31 09:54:13,776 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-31 09:54:13,777 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-31 09:54:13,778 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-31 09:54:13,779 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-31 09:54:13,781 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-31 09:54:13,784 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-31 09:54:13,785 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-31 09:54:13,787 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-31 09:54:13,788 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-31 09:54:13,791 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-31 09:54:13,792 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-31 09:54:13,792 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-31 09:54:13,793 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-31 09:54:13,794 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-31 09:54:13,796 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-31 09:54:13,796 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-31 09:54:13,802 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-31 09:54:13,802 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-31 09:54:13,803 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-31 09:54:13,803 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-31 09:54:13,803 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-31 09:54:13,805 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-31 09:54:13,806 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-31 09:54:13,806 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-12-31 09:54:13,837 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-31 09:54:13,838 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-31 09:54:13,840 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-31 09:54:13,840 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-31 09:54:13,841 INFO L133 SettingsManager]: * Use SBE=true [2018-12-31 09:54:13,841 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-31 09:54:13,841 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-31 09:54:13,842 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-31 09:54:13,842 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-31 09:54:13,842 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-31 09:54:13,843 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-31 09:54:13,843 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-31 09:54:13,843 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-31 09:54:13,843 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-31 09:54:13,844 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-31 09:54:13,844 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-31 09:54:13,844 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-31 09:54:13,846 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-31 09:54:13,846 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-31 09:54:13,846 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-31 09:54:13,847 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-31 09:54:13,847 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-31 09:54:13,847 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-31 09:54:13,847 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-31 09:54:13,847 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-31 09:54:13,847 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-31 09:54:13,849 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-31 09:54:13,849 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-31 09:54:13,849 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 -> a033d09eab07f8bc6e49bb4301ebd6c89110f535 [2018-12-31 09:54:13,911 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-31 09:54:13,928 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-31 09:54:13,932 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-31 09:54:13,934 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-31 09:54:13,934 INFO L276 PluginConnector]: CDTParser initialized [2018-12-31 09:54:13,935 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/svcomp/c/recursive-simple/id2_b3_o2_false-unreach-call_true-termination_true-no-overflow.c [2018-12-31 09:54:14,006 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b55afa0e4/5a994e5f060444dba2f07f6928eeefa6/FLAG3249f972c [2018-12-31 09:54:14,462 INFO L307 CDTParser]: Found 1 translation units. [2018-12-31 09:54:14,463 INFO L161 CDTParser]: Scanning /storage/repos/svcomp/c/recursive-simple/id2_b3_o2_false-unreach-call_true-termination_true-no-overflow.c [2018-12-31 09:54:14,471 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b55afa0e4/5a994e5f060444dba2f07f6928eeefa6/FLAG3249f972c [2018-12-31 09:54:14,839 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b55afa0e4/5a994e5f060444dba2f07f6928eeefa6 [2018-12-31 09:54:14,844 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-31 09:54:14,846 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-31 09:54:14,847 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-31 09:54:14,848 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-31 09:54:14,854 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-31 09:54:14,855 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.12 09:54:14" (1/1) ... [2018-12-31 09:54:14,859 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55cc0ecf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 09:54:14, skipping insertion in model container [2018-12-31 09:54:14,860 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.12 09:54:14" (1/1) ... [2018-12-31 09:54:14,871 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-31 09:54:14,894 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-31 09:54:15,127 INFO L204 PostProcessor]: Analyzing one entry point: main [2018-12-31 09:54:15,134 INFO L191 MainTranslator]: Completed pre-run [2018-12-31 09:54:15,159 INFO L204 PostProcessor]: Analyzing one entry point: main [2018-12-31 09:54:15,178 INFO L195 MainTranslator]: Completed translation [2018-12-31 09:54:15,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 09:54:15 WrapperNode [2018-12-31 09:54:15,179 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-31 09:54:15,180 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-31 09:54:15,180 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-31 09:54:15,180 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-31 09:54:15,190 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 09:54:15" (1/1) ... [2018-12-31 09:54:15,196 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 09:54:15" (1/1) ... [2018-12-31 09:54:15,219 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-31 09:54:15,219 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-31 09:54:15,220 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-31 09:54:15,220 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-31 09:54:15,230 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 09:54:15" (1/1) ... [2018-12-31 09:54:15,231 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 09:54:15" (1/1) ... [2018-12-31 09:54:15,232 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 09:54:15" (1/1) ... [2018-12-31 09:54:15,232 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 09:54:15" (1/1) ... [2018-12-31 09:54:15,238 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 09:54:15" (1/1) ... [2018-12-31 09:54:15,241 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 09:54:15" (1/1) ... [2018-12-31 09:54:15,242 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 09:54:15" (1/1) ... [2018-12-31 09:54:15,244 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-31 09:54:15,244 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-31 09:54:15,245 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-31 09:54:15,245 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-31 09:54:15,246 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 09:54:15" (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 [2018-12-31 09:54:15,415 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2018-12-31 09:54:15,416 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2018-12-31 09:54:15,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-31 09:54:15,416 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-31 09:54:15,416 INFO L130 BoogieDeclarations]: Found specification of procedure id [2018-12-31 09:54:15,416 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2018-12-31 09:54:15,891 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-31 09:54:15,892 INFO L280 CfgBuilder]: Removed 4 assue(true) statements. [2018-12-31 09:54:15,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 09:54:15 BoogieIcfgContainer [2018-12-31 09:54:15,893 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-31 09:54:15,894 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-31 09:54:15,894 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-31 09:54:15,897 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-31 09:54:15,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.12 09:54:14" (1/3) ... [2018-12-31 09:54:15,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d790428 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.12 09:54:15, skipping insertion in model container [2018-12-31 09:54:15,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 09:54:15" (2/3) ... [2018-12-31 09:54:15,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d790428 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.12 09:54:15, skipping insertion in model container [2018-12-31 09:54:15,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 09:54:15" (3/3) ... [2018-12-31 09:54:15,901 INFO L112 eAbstractionObserver]: Analyzing ICFG id2_b3_o2_false-unreach-call_true-termination_true-no-overflow.c [2018-12-31 09:54:15,914 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-31 09:54:15,922 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-31 09:54:15,947 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-31 09:54:15,996 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-31 09:54:15,997 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-31 09:54:15,998 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-31 09:54:15,998 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-31 09:54:15,998 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-31 09:54:15,998 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-31 09:54:15,999 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-31 09:54:15,999 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-31 09:54:15,999 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-31 09:54:16,024 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2018-12-31 09:54:16,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-12-31 09:54:16,030 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 09:54:16,032 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 09:54:16,035 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 09:54:16,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 09:54:16,043 INFO L82 PathProgramCache]: Analyzing trace with hash -394807891, now seen corresponding path program 1 times [2018-12-31 09:54:16,045 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 09:54:16,046 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 09:54:16,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 09:54:16,096 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 09:54:16,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 09:54:16,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 09:54:16,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 09:54:16,392 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-31 09:54:16,392 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-31 09:54:16,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-31 09:54:16,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-31 09:54:16,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-31 09:54:16,414 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 5 states. [2018-12-31 09:54:16,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 09:54:16,480 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2018-12-31 09:54:16,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-31 09:54:16,482 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2018-12-31 09:54:16,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 09:54:16,493 INFO L225 Difference]: With dead ends: 35 [2018-12-31 09:54:16,493 INFO L226 Difference]: Without dead ends: 22 [2018-12-31 09:54:16,497 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-31 09:54:16,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-12-31 09:54:16,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-12-31 09:54:16,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-12-31 09:54:16,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2018-12-31 09:54:16,542 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 9 [2018-12-31 09:54:16,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 09:54:16,543 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2018-12-31 09:54:16,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-31 09:54:16,543 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2018-12-31 09:54:16,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-12-31 09:54:16,545 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 09:54:16,545 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 09:54:16,546 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 09:54:16,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 09:54:16,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1343664860, now seen corresponding path program 1 times [2018-12-31 09:54:16,546 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 09:54:16,547 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 09:54:16,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 09:54:16,548 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 09:54:16,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 09:54:16,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 09:54:16,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 09:54:16,685 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-31 09:54:16,685 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-31 09:54:16,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-31 09:54:16,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-31 09:54:16,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-31 09:54:16,688 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 5 states. [2018-12-31 09:54:16,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 09:54:16,799 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2018-12-31 09:54:16,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-31 09:54:16,800 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2018-12-31 09:54:16,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 09:54:16,802 INFO L225 Difference]: With dead ends: 40 [2018-12-31 09:54:16,802 INFO L226 Difference]: Without dead ends: 28 [2018-12-31 09:54:16,804 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-31 09:54:16,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-12-31 09:54:16,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2018-12-31 09:54:16,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-12-31 09:54:16,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2018-12-31 09:54:16,814 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 16 [2018-12-31 09:54:16,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 09:54:16,815 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2018-12-31 09:54:16,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-31 09:54:16,815 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2018-12-31 09:54:16,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-12-31 09:54:16,816 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 09:54:16,816 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 09:54:16,817 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 09:54:16,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 09:54:16,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1372294011, now seen corresponding path program 1 times [2018-12-31 09:54:16,817 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 09:54:16,817 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 09:54:16,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 09:54:16,819 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 09:54:16,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 09:54:16,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 09:54:17,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 09:54:17,310 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-31 09:54:17,310 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-12-31 09:54:17,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-31 09:54:17,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-31 09:54:17,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-12-31 09:54:17,311 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 8 states. [2018-12-31 09:54:17,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 09:54:17,505 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2018-12-31 09:54:17,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-31 09:54:17,508 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2018-12-31 09:54:17,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 09:54:17,509 INFO L225 Difference]: With dead ends: 32 [2018-12-31 09:54:17,509 INFO L226 Difference]: Without dead ends: 28 [2018-12-31 09:54:17,511 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-12-31 09:54:17,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-12-31 09:54:17,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2018-12-31 09:54:17,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-12-31 09:54:17,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2018-12-31 09:54:17,524 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 16 [2018-12-31 09:54:17,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 09:54:17,524 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2018-12-31 09:54:17,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-31 09:54:17,526 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2018-12-31 09:54:17,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-12-31 09:54:17,527 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 09:54:17,529 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 09:54:17,530 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 09:54:17,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 09:54:17,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1000474712, now seen corresponding path program 1 times [2018-12-31 09:54:17,531 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 09:54:17,531 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 09:54:17,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 09:54:17,536 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 09:54:17,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 09:54:17,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 09:54:17,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-31 09:54:17,723 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-31 09:54:17,723 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-31 09:54:17,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-31 09:54:17,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-31 09:54:17,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-31 09:54:17,725 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2018-12-31 09:54:17,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 09:54:17,774 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2018-12-31 09:54:17,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-31 09:54:17,776 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2018-12-31 09:54:17,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 09:54:17,777 INFO L225 Difference]: With dead ends: 44 [2018-12-31 09:54:17,778 INFO L226 Difference]: Without dead ends: 32 [2018-12-31 09:54:17,779 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-31 09:54:17,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-12-31 09:54:17,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2018-12-31 09:54:17,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-12-31 09:54:17,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2018-12-31 09:54:17,786 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 23 [2018-12-31 09:54:17,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 09:54:17,786 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2018-12-31 09:54:17,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-31 09:54:17,787 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2018-12-31 09:54:17,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-12-31 09:54:17,788 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 09:54:17,788 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 09:54:17,788 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 09:54:17,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 09:54:17,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1196988217, now seen corresponding path program 1 times [2018-12-31 09:54:17,789 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 09:54:17,789 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 09:54:17,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 09:54:17,791 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 09:54:17,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 09:54:17,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 09:54:17,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-31 09:54:17,919 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-31 09:54:17,919 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-31 09:54:17,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-31 09:54:17,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-31 09:54:17,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-31 09:54:17,921 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 5 states. [2018-12-31 09:54:17,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 09:54:17,953 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2018-12-31 09:54:17,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-31 09:54:17,954 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2018-12-31 09:54:17,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 09:54:17,955 INFO L225 Difference]: With dead ends: 36 [2018-12-31 09:54:17,956 INFO L226 Difference]: Without dead ends: 32 [2018-12-31 09:54:17,956 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-31 09:54:17,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-12-31 09:54:17,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2018-12-31 09:54:17,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-12-31 09:54:17,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2018-12-31 09:54:17,963 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 23 [2018-12-31 09:54:17,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 09:54:17,963 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2018-12-31 09:54:17,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-31 09:54:17,964 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2018-12-31 09:54:17,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-12-31 09:54:17,965 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 09:54:17,965 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 09:54:17,965 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 09:54:17,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 09:54:17,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1168359066, now seen corresponding path program 1 times [2018-12-31 09:54:17,966 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 09:54:17,966 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 09:54:17,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 09:54:17,968 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 09:54:17,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 09:54:17,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-31 09:54:18,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-31 09:54:18,026 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-31 09:54:18,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.12 09:54:18 BoogieIcfgContainer [2018-12-31 09:54:18,060 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-31 09:54:18,061 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-31 09:54:18,061 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-31 09:54:18,061 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-31 09:54:18,062 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 09:54:15" (3/4) ... [2018-12-31 09:54:18,065 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-12-31 09:54:18,134 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2018-12-31 09:54:18,135 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-31 09:54:18,136 INFO L168 Benchmark]: Toolchain (without parser) took 3291.07 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.8 MB). Free memory was 951.4 MB in the beginning and 1.0 GB in the end (delta: -72.8 MB). Peak memory consumption was 63.0 MB. Max. memory is 11.5 GB. [2018-12-31 09:54:18,142 INFO L168 Benchmark]: CDTParser took 0.15 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. [2018-12-31 09:54:18,143 INFO L168 Benchmark]: CACSL2BoogieTranslator took 332.26 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. [2018-12-31 09:54:18,148 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.92 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. [2018-12-31 09:54:18,149 INFO L168 Benchmark]: Boogie Preprocessor took 24.67 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. [2018-12-31 09:54:18,149 INFO L168 Benchmark]: RCFGBuilder took 648.22 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.8 MB). Free memory was 940.6 MB in the beginning and 1.1 GB in the end (delta: -165.8 MB). Peak memory consumption was 24.9 MB. Max. memory is 11.5 GB. [2018-12-31 09:54:18,150 INFO L168 Benchmark]: TraceAbstraction took 2166.51 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: 75.4 MB). Peak memory consumption was 75.4 MB. Max. memory is 11.5 GB. [2018-12-31 09:54:18,150 INFO L168 Benchmark]: Witness Printer took 74.24 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: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. [2018-12-31 09:54:18,155 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 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 332.26 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 38.92 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 24.67 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 648.22 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.8 MB). Free memory was 940.6 MB in the beginning and 1.1 GB in the end (delta: -165.8 MB). Peak memory consumption was 24.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2166.51 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: 75.4 MB). Peak memory consumption was 75.4 MB. Max. memory is 11.5 GB. * Witness Printer took 74.24 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: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 25]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L22] unsigned int input = __VERIFIER_nondet_uint(); [L23] CALL, EXPR id(input) VAL [\old(x)=2] [L8] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L9] CALL, EXPR id2(x-1) VAL [\old(x)=1] [L15] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L16] CALL, EXPR id(x-1) VAL [\old(x)=0] [L8] COND TRUE x==0 [L8] return 0; VAL [\old(x)=0, \result=0, x=0] [L16] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L16] unsigned int ret = id(x-1) + 1; [L17] COND FALSE !(ret > 3) [L18] return ret; VAL [\old(x)=1, \result=1, ret=1, x=1] [L9] RET, EXPR id2(x-1) VAL [\old(x)=2, id2(x-1)=1, x=2] [L9] unsigned int ret = id2(x-1) + 1; [L10] COND FALSE !(ret > 3) [L11] return ret; VAL [\old(x)=2, \result=2, ret=2, x=2] [L23] RET, EXPR id(input) [L23] unsigned int result = id(input); [L24] COND TRUE result == 2 [L25] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 23 locations, 1 error locations. UNSAFE Result, 2.0s OverallTime, 6 OverallIterations, 2 TraceHistogramMax, 0.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 121 SDtfs, 9 SDslu, 398 SDs, 0 SdLazy, 73 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=4, 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, 5 MinimizatonAttempts, 8 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 110 NumberOfCodeBlocks, 110 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 82 ConstructedInterpolants, 0 QuantifiedInterpolants, 4062 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 8/8 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...