./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/id_i5_o5-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30f4e4ab Calling Ultimate with: /usr/bin/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 ../sv-benchmarks/c/recursive-simple/id_i5_o5-1.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 bd8a40b9ab0ccbf5be4fcc211d81cb04996473fb ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.1.24-30f4e4a [2019-11-28 00:25:47,820 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 00:25:47,823 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 00:25:47,839 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 00:25:47,840 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 00:25:47,841 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 00:25:47,842 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 00:25:47,844 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 00:25:47,846 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 00:25:47,847 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 00:25:47,848 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 00:25:47,850 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 00:25:47,850 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 00:25:47,851 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 00:25:47,852 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 00:25:47,854 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 00:25:47,854 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 00:25:47,856 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 00:25:47,858 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 00:25:47,860 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 00:25:47,861 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 00:25:47,863 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 00:25:47,864 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 00:25:47,865 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 00:25:47,867 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 00:25:47,868 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 00:25:47,868 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 00:25:47,869 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 00:25:47,870 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 00:25:47,871 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 00:25:47,871 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 00:25:47,872 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 00:25:47,873 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 00:25:47,874 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 00:25:47,875 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 00:25:47,875 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 00:25:47,876 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 00:25:47,876 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 00:25:47,877 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 00:25:47,878 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 00:25:47,879 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 00:25:47,880 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-28 00:25:47,900 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 00:25:47,901 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 00:25:47,902 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 00:25:47,902 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 00:25:47,902 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 00:25:47,903 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 00:25:47,903 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 00:25:47,903 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 00:25:47,903 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 00:25:47,904 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 00:25:47,904 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 00:25:47,904 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 00:25:47,904 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 00:25:47,904 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 00:25:47,905 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 00:25:47,905 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 00:25:47,905 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 00:25:47,905 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 00:25:47,906 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 00:25:47,906 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 00:25:47,906 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 00:25:47,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 00:25:47,907 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 00:25:47,907 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 00:25:47,907 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 00:25:47,907 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 00:25:47,907 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 00:25:47,908 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 00:25:47,908 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 -> /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 -> bd8a40b9ab0ccbf5be4fcc211d81cb04996473fb [2019-11-28 00:25:48,255 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 00:25:48,276 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 00:25:48,280 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 00:25:48,282 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 00:25:48,282 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 00:25:48,283 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id_i5_o5-1.c [2019-11-28 00:25:48,353 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecd1b5489/78939ccdc12945788ff0285d61cb74a0/FLAG9c5cb2655 [2019-11-28 00:25:48,798 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 00:25:48,801 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_i5_o5-1.c [2019-11-28 00:25:48,807 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecd1b5489/78939ccdc12945788ff0285d61cb74a0/FLAG9c5cb2655 [2019-11-28 00:25:49,204 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecd1b5489/78939ccdc12945788ff0285d61cb74a0 [2019-11-28 00:25:49,208 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 00:25:49,210 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 00:25:49,211 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 00:25:49,212 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 00:25:49,215 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 00:25:49,216 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 12:25:49" (1/1) ... [2019-11-28 00:25:49,220 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b4753fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:49, skipping insertion in model container [2019-11-28 00:25:49,220 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 12:25:49" (1/1) ... [2019-11-28 00:25:49,228 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 00:25:49,247 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 00:25:49,400 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 00:25:49,404 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 00:25:49,417 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 00:25:49,429 INFO L208 MainTranslator]: Completed translation [2019-11-28 00:25:49,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:49 WrapperNode [2019-11-28 00:25:49,430 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 00:25:49,431 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 00:25:49,431 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 00:25:49,431 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 00:25:49,440 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:49" (1/1) ... [2019-11-28 00:25:49,445 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:49" (1/1) ... [2019-11-28 00:25:49,463 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 00:25:49,464 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 00:25:49,464 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 00:25:49,464 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 00:25:49,534 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:49" (1/1) ... [2019-11-28 00:25:49,534 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:49" (1/1) ... [2019-11-28 00:25:49,535 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:49" (1/1) ... [2019-11-28 00:25:49,535 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:49" (1/1) ... [2019-11-28 00:25:49,537 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:49" (1/1) ... [2019-11-28 00:25:49,539 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:49" (1/1) ... [2019-11-28 00:25:49,540 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:49" (1/1) ... [2019-11-28 00:25:49,541 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 00:25:49,541 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 00:25:49,541 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 00:25:49,542 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 00:25:49,542 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:49" (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 [2019-11-28 00:25:49,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 00:25:49,601 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 00:25:49,601 INFO L130 BoogieDeclarations]: Found specification of procedure id [2019-11-28 00:25:49,601 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2019-11-28 00:25:49,755 INFO L292 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 00:25:49,756 INFO L297 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-28 00:25:49,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:25:49 BoogieIcfgContainer [2019-11-28 00:25:49,757 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 00:25:49,758 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 00:25:49,758 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 00:25:49,761 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 00:25:49,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 12:25:49" (1/3) ... [2019-11-28 00:25:49,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@390aef6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 12:25:49, skipping insertion in model container [2019-11-28 00:25:49,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:49" (2/3) ... [2019-11-28 00:25:49,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@390aef6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 12:25:49, skipping insertion in model container [2019-11-28 00:25:49,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:25:49" (3/3) ... [2019-11-28 00:25:49,765 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i5_o5-1.c [2019-11-28 00:25:49,774 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 00:25:49,779 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-28 00:25:49,789 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-28 00:25:49,813 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 00:25:49,813 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 00:25:49,813 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 00:25:49,813 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 00:25:49,813 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 00:25:49,814 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 00:25:49,814 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 00:25:49,814 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 00:25:49,833 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-11-28 00:25:49,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-28 00:25:49,839 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:49,840 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:49,841 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:49,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:49,848 INFO L82 PathProgramCache]: Analyzing trace with hash 389977641, now seen corresponding path program 1 times [2019-11-28 00:25:49,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:49,858 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949836626] [2019-11-28 00:25:49,858 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:49,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:50,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:50,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 00:25:50,245 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949836626] [2019-11-28 00:25:50,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 00:25:50,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-28 00:25:50,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46239051] [2019-11-28 00:25:50,257 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-28 00:25:50,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:25:50,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-28 00:25:50,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-28 00:25:50,277 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 7 states. [2019-11-28 00:25:50,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:25:50,425 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2019-11-28 00:25:50,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 00:25:50,427 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2019-11-28 00:25:50,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:25:50,436 INFO L225 Difference]: With dead ends: 24 [2019-11-28 00:25:50,436 INFO L226 Difference]: Without dead ends: 14 [2019-11-28 00:25:50,440 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-28 00:25:50,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-28 00:25:50,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-28 00:25:50,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-28 00:25:50,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-11-28 00:25:50,482 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2019-11-28 00:25:50,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:25:50,483 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-11-28 00:25:50,483 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-28 00:25:50,483 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-11-28 00:25:50,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-28 00:25:50,485 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:50,485 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:50,486 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:50,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:50,486 INFO L82 PathProgramCache]: Analyzing trace with hash -881029229, now seen corresponding path program 1 times [2019-11-28 00:25:50,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:50,487 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943953755] [2019-11-28 00:25:50,487 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:50,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:50,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:50,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:50,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-28 00:25:50,644 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943953755] [2019-11-28 00:25:50,645 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025825834] [2019-11-28 00:25:50,645 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:50,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:50,695 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 00:25:50,701 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:25:50,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-28 00:25:50,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:25:50,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 10 [2019-11-28 00:25:50,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627411387] [2019-11-28 00:25:50,777 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-28 00:25:50,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:25:50,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-28 00:25:50,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-11-28 00:25:50,778 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 10 states. [2019-11-28 00:25:50,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:25:50,887 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2019-11-28 00:25:50,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-28 00:25:50,889 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2019-11-28 00:25:50,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:25:50,890 INFO L225 Difference]: With dead ends: 21 [2019-11-28 00:25:50,890 INFO L226 Difference]: Without dead ends: 17 [2019-11-28 00:25:50,892 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-11-28 00:25:50,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-28 00:25:50,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-28 00:25:50,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-28 00:25:50,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-11-28 00:25:50,903 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2019-11-28 00:25:50,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:25:50,903 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-11-28 00:25:50,904 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-28 00:25:50,904 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-11-28 00:25:50,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-28 00:25:50,905 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:50,905 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:51,106 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:51,106 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:51,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:51,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1824240471, now seen corresponding path program 2 times [2019-11-28 00:25:51,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:51,107 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198518129] [2019-11-28 00:25:51,108 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:51,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:51,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:51,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:51,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:51,298 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-28 00:25:51,298 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198518129] [2019-11-28 00:25:51,299 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448267781] [2019-11-28 00:25:51,299 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-11-28 00:25:51,330 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 00:25:51,330 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:51,332 INFO L255 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-28 00:25:51,334 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:25:51,375 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-28 00:25:51,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:25:51,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 11 [2019-11-28 00:25:51,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682136070] [2019-11-28 00:25:51,377 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-28 00:25:51,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:25:51,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-28 00:25:51,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-11-28 00:25:51,379 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 11 states. [2019-11-28 00:25:51,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:25:51,479 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2019-11-28 00:25:51,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-28 00:25:51,480 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2019-11-28 00:25:51,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:25:51,481 INFO L225 Difference]: With dead ends: 24 [2019-11-28 00:25:51,481 INFO L226 Difference]: Without dead ends: 20 [2019-11-28 00:25:51,482 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-11-28 00:25:51,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-28 00:25:51,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-28 00:25:51,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-28 00:25:51,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-11-28 00:25:51,488 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2019-11-28 00:25:51,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:25:51,488 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-11-28 00:25:51,489 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-28 00:25:51,489 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-11-28 00:25:51,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-28 00:25:51,490 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:51,490 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:51,701 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:51,702 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:51,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:51,703 INFO L82 PathProgramCache]: Analyzing trace with hash -28473709, now seen corresponding path program 3 times [2019-11-28 00:25:51,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:51,704 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286166451] [2019-11-28 00:25:51,704 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:51,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:51,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:51,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:51,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:51,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:51,919 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-28 00:25:51,921 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286166451] [2019-11-28 00:25:51,921 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596257351] [2019-11-28 00:25:51,922 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:51,959 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-28 00:25:51,960 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 00:25:51,961 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-28 00:25:51,964 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:25:52,011 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-28 00:25:52,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:25:52,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 12 [2019-11-28 00:25:52,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997268443] [2019-11-28 00:25:52,013 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-28 00:25:52,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:25:52,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-28 00:25:52,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-11-28 00:25:52,014 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 12 states. [2019-11-28 00:25:52,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:25:52,123 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2019-11-28 00:25:52,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-28 00:25:52,123 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2019-11-28 00:25:52,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:25:52,125 INFO L225 Difference]: With dead ends: 27 [2019-11-28 00:25:52,125 INFO L226 Difference]: Without dead ends: 23 [2019-11-28 00:25:52,126 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-11-28 00:25:52,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-28 00:25:52,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-28 00:25:52,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-28 00:25:52,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-11-28 00:25:52,134 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 27 [2019-11-28 00:25:52,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:25:52,134 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-11-28 00:25:52,134 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-28 00:25:52,135 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-11-28 00:25:52,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-28 00:25:52,136 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:52,136 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:52,337 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:52,337 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:52,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:52,338 INFO L82 PathProgramCache]: Analyzing trace with hash -2080894167, now seen corresponding path program 4 times [2019-11-28 00:25:52,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:52,339 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017353493] [2019-11-28 00:25:52,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:52,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:52,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:52,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:52,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:52,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:52,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:52,577 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-28 00:25:52,578 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017353493] [2019-11-28 00:25:52,578 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16388545] [2019-11-28 00:25:52,578 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-11-28 00:25:52,612 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-28 00:25:52,612 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:52,614 INFO L255 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-28 00:25:52,620 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:25:52,665 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-28 00:25:52,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:25:52,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 13 [2019-11-28 00:25:52,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401888293] [2019-11-28 00:25:52,667 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-28 00:25:52,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:25:52,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-28 00:25:52,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2019-11-28 00:25:52,668 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 13 states. [2019-11-28 00:25:52,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:25:52,766 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2019-11-28 00:25:52,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-28 00:25:52,766 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2019-11-28 00:25:52,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:25:52,767 INFO L225 Difference]: With dead ends: 30 [2019-11-28 00:25:52,768 INFO L226 Difference]: Without dead ends: 26 [2019-11-28 00:25:52,768 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2019-11-28 00:25:52,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-28 00:25:52,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-28 00:25:52,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-28 00:25:52,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-11-28 00:25:52,775 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 33 [2019-11-28 00:25:52,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:25:52,775 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-11-28 00:25:52,775 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-28 00:25:52,776 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-11-28 00:25:52,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-28 00:25:52,777 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:52,777 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:52,980 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:52,981 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:52,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:52,982 INFO L82 PathProgramCache]: Analyzing trace with hash -687460973, now seen corresponding path program 5 times [2019-11-28 00:25:52,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:52,983 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849294071] [2019-11-28 00:25:52,983 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:52,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 00:25:53,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 00:25:53,025 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 00:25:53,025 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-28 00:25:53,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 12:25:53 BoogieIcfgContainer [2019-11-28 00:25:53,064 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 00:25:53,065 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 00:25:53,065 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 00:25:53,065 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 00:25:53,065 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:25:49" (3/4) ... [2019-11-28 00:25:53,067 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-28 00:25:53,120 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 00:25:53,120 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 00:25:53,123 INFO L168 Benchmark]: Toolchain (without parser) took 3912.84 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 102.2 MB). Free memory was 963.1 MB in the beginning and 866.5 MB in the end (delta: 96.6 MB). Peak memory consumption was 198.8 MB. Max. memory is 11.5 GB. [2019-11-28 00:25:53,124 INFO L168 Benchmark]: CDTParser took 0.53 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 00:25:53,128 INFO L168 Benchmark]: CACSL2BoogieTranslator took 219.08 ms. Allocated memory is still 1.0 GB. Free memory was 963.1 MB in the beginning and 951.0 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. [2019-11-28 00:25:53,131 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.69 ms. Allocated memory is still 1.0 GB. Free memory is still 951.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 00:25:53,134 INFO L168 Benchmark]: Boogie Preprocessor took 77.30 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 102.2 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -147.2 MB). Peak memory consumption was 9.9 MB. Max. memory is 11.5 GB. [2019-11-28 00:25:53,135 INFO L168 Benchmark]: RCFGBuilder took 215.96 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 11.5 GB. [2019-11-28 00:25:53,137 INFO L168 Benchmark]: TraceAbstraction took 3306.02 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 873.3 MB in the end (delta: 205.5 MB). Peak memory consumption was 205.5 MB. Max. memory is 11.5 GB. [2019-11-28 00:25:53,138 INFO L168 Benchmark]: Witness Printer took 56.07 ms. Allocated memory is still 1.1 GB. Free memory was 873.3 MB in the beginning and 866.5 MB in the end (delta: 6.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 11.5 GB. [2019-11-28 00:25:53,145 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.53 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 219.08 ms. Allocated memory is still 1.0 GB. Free memory was 963.1 MB in the beginning and 951.0 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 32.69 ms. Allocated memory is still 1.0 GB. Free memory is still 951.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 77.30 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 102.2 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -147.2 MB). Peak memory consumption was 9.9 MB. Max. memory is 11.5 GB. * RCFGBuilder took 215.96 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3306.02 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 873.3 MB in the end (delta: 205.5 MB). Peak memory consumption was 205.5 MB. Max. memory is 11.5 GB. * Witness Printer took 56.07 ms. Allocated memory is still 1.1 GB. Free memory was 873.3 MB in the beginning and 866.5 MB in the end (delta: 6.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int input = 5; [L11] CALL, EXPR id(input) VAL [\old(x)=5] [L5] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L6] CALL, EXPR id(x-1) VAL [\old(x)=4] [L5] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L6] CALL, EXPR id(x-1) VAL [\old(x)=3] [L5] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L6] CALL, EXPR id(x-1) VAL [\old(x)=2] [L5] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L6] CALL, EXPR id(x-1) VAL [\old(x)=1] [L5] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L6] CALL, EXPR id(x-1) VAL [\old(x)=0] [L5] COND TRUE x==0 [L5] return 0; VAL [\old(x)=0, \result=0, x=0] [L6] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=5, id(x-1)=4, x=5] [L6] return id(x-1) + 1; [L11] RET, EXPR id(input) [L11] int result = id(input); [L12] COND TRUE result == 5 [L13] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. Result: UNSAFE, OverallTime: 3.2s, OverallIterations: 6, TraceHistogramMax: 6, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 48 SDtfs, 69 SDslu, 194 SDs, 0 SdLazy, 208 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 172 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=5, 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, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 240 NumberOfCodeBlocks, 235 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 192 ConstructedInterpolants, 0 QuantifiedInterpolants, 11960 SizeOfPredicates, 18 NumberOfNonLiveVariables, 216 ConjunctsInSsa, 36 ConjunctsInUnsatCore, 9 InterpolantComputations, 1 PerfectInterpolantSequences, 100/200 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...