./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/id_i10_o10-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive-simple/id_i10_o10-1.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(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 68fd8ffa149cd68eb012d97df5d4befaa28f95fa ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 09:00:38,771 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 09:00:38,773 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 09:00:38,811 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 09:00:38,812 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 09:00:38,814 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 09:00:38,815 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 09:00:38,819 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 09:00:38,821 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 09:00:38,824 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 09:00:38,825 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 09:00:38,828 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 09:00:38,828 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 09:00:38,830 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 09:00:38,831 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 09:00:38,833 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 09:00:38,834 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 09:00:38,834 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 09:00:38,836 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 09:00:38,840 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 09:00:38,841 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 09:00:38,842 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 09:00:38,843 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 09:00:38,844 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 09:00:38,849 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 09:00:38,849 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 09:00:38,849 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 09:00:38,850 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 09:00:38,850 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 09:00:38,851 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 09:00:38,851 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 09:00:38,851 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 09:00:38,853 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 09:00:38,853 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 09:00:38,854 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 09:00:38,854 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 09:00:38,855 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 09:00:38,855 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 09:00:38,855 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 09:00:38,856 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 09:00:38,856 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 09:00:38,857 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 09:00:38,886 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 09:00:38,887 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 09:00:38,888 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 09:00:38,888 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 09:00:38,889 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 09:00:38,889 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 09:00:38,889 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 09:00:38,889 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 09:00:38,890 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 09:00:38,890 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 09:00:38,890 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 09:00:38,890 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 09:00:38,890 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 09:00:38,891 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 09:00:38,891 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 09:00:38,891 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 09:00:38,891 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 09:00:38,891 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 09:00:38,891 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 09:00:38,891 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 09:00:38,891 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 09:00:38,891 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 09:00:38,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 09:00:38,892 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 09:00:38,892 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 09:00:38,892 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 09:00:38,892 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 09:00:38,892 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 09:00:38,892 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 09:00:38,892 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 09:00:38,892 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68fd8ffa149cd68eb012d97df5d4befaa28f95fa [2021-08-26 09:00:39,168 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 09:00:39,191 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 09:00:39,194 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 09:00:39,195 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 09:00:39,195 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 09:00:39,196 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id_i10_o10-1.c [2021-08-26 09:00:39,248 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc030db22/bcdbbf0fa0994ed1ac59fed877403271/FLAG53d4a42f5 [2021-08-26 09:00:39,589 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 09:00:39,590 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_i10_o10-1.c [2021-08-26 09:00:39,594 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc030db22/bcdbbf0fa0994ed1ac59fed877403271/FLAG53d4a42f5 [2021-08-26 09:00:39,603 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc030db22/bcdbbf0fa0994ed1ac59fed877403271 [2021-08-26 09:00:39,605 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 09:00:39,607 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 09:00:39,609 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 09:00:39,610 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 09:00:39,612 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 09:00:39,612 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 09:00:39" (1/1) ... [2021-08-26 09:00:39,613 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f68360f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:00:39, skipping insertion in model container [2021-08-26 09:00:39,613 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 09:00:39" (1/1) ... [2021-08-26 09:00:39,618 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 09:00:39,626 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 09:00:39,750 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_i10_o10-1.c[454,467] [2021-08-26 09:00:39,753 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 09:00:39,764 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 09:00:39,776 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_i10_o10-1.c[454,467] [2021-08-26 09:00:39,776 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 09:00:39,785 INFO L208 MainTranslator]: Completed translation [2021-08-26 09:00:39,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:00:39 WrapperNode [2021-08-26 09:00:39,787 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 09:00:39,788 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 09:00:39,788 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 09:00:39,788 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 09:00:39,794 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:00:39" (1/1) ... [2021-08-26 09:00:39,805 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:00:39" (1/1) ... [2021-08-26 09:00:39,833 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 09:00:39,834 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 09:00:39,834 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 09:00:39,834 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 09:00:39,839 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:00:39" (1/1) ... [2021-08-26 09:00:39,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:00:39" (1/1) ... [2021-08-26 09:00:39,849 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:00:39" (1/1) ... [2021-08-26 09:00:39,849 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:00:39" (1/1) ... [2021-08-26 09:00:39,853 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:00:39" (1/1) ... [2021-08-26 09:00:39,854 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:00:39" (1/1) ... [2021-08-26 09:00:39,857 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:00:39" (1/1) ... [2021-08-26 09:00:39,859 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 09:00:39,860 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 09:00:39,860 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 09:00:39,860 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 09:00:39,861 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:00:39" (1/1) ... [2021-08-26 09:00:39,866 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 09:00:39,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 09:00:39,883 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-26 09:00:39,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 09:00:39,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 09:00:39,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 09:00:39,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-26 09:00:39,917 INFO L130 BoogieDeclarations]: Found specification of procedure id [2021-08-26 09:00:39,919 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2021-08-26 09:00:39,919 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 09:00:40,079 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 09:00:40,080 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-08-26 09:00:40,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 09:00:40 BoogieIcfgContainer [2021-08-26 09:00:40,081 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 09:00:40,082 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 09:00:40,082 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 09:00:40,084 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 09:00:40,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 09:00:39" (1/3) ... [2021-08-26 09:00:40,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@759ac4be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 09:00:40, skipping insertion in model container [2021-08-26 09:00:40,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 09:00:39" (2/3) ... [2021-08-26 09:00:40,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@759ac4be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 09:00:40, skipping insertion in model container [2021-08-26 09:00:40,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 09:00:40" (3/3) ... [2021-08-26 09:00:40,086 INFO L111 eAbstractionObserver]: Analyzing ICFG id_i10_o10-1.c [2021-08-26 09:00:40,089 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 09:00:40,090 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-26 09:00:40,125 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 09:00:40,130 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-26 09:00:40,130 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-26 09:00:40,141 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-26 09:00:40,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-26 09:00:40,145 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 09:00:40,146 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 09:00:40,146 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 09:00:40,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 09:00:40,150 INFO L82 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2021-08-26 09:00:40,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 09:00:40,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934843360] [2021-08-26 09:00:40,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:00:40,157 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 09:00:40,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:40,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:40,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:40,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 09:00:40,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 09:00:40,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934843360] [2021-08-26 09:00:40,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934843360] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 09:00:40,351 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 09:00:40,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-26 09:00:40,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972332321] [2021-08-26 09:00:40,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 09:00:40,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 09:00:40,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 09:00:40,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-26 09:00:40,365 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-26 09:00:40,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 09:00:40,447 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2021-08-26 09:00:40,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 09:00:40,449 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-08-26 09:00:40,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 09:00:40,454 INFO L225 Difference]: With dead ends: 28 [2021-08-26 09:00:40,455 INFO L226 Difference]: Without dead ends: 15 [2021-08-26 09:00:40,457 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.7ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-26 09:00:40,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-08-26 09:00:40,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-08-26 09:00:40,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-26 09:00:40,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-08-26 09:00:40,483 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2021-08-26 09:00:40,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 09:00:40,483 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-08-26 09:00:40,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-26 09:00:40,484 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-08-26 09:00:40,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-26 09:00:40,485 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 09:00:40,485 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 09:00:40,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 09:00:40,486 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 09:00:40,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 09:00:40,488 INFO L82 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2021-08-26 09:00:40,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 09:00:40,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56187196] [2021-08-26 09:00:40,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:00:40,489 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 09:00:40,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:40,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:40,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:40,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:40,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:40,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-26 09:00:40,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 09:00:40,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56187196] [2021-08-26 09:00:40,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56187196] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:00:40,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295396439] [2021-08-26 09:00:40,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:00:40,601 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:00:40,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 09:00:40,613 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 09:00:40,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-26 09:00:40,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:40,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-26 09:00:40,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 09:00:40,901 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-26 09:00:40,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295396439] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:00:40,902 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 09:00:40,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-26 09:00:40,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574725277] [2021-08-26 09:00:40,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 09:00:40,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 09:00:40,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 09:00:40,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-26 09:00:40,906 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-26 09:00:40,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 09:00:40,968 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2021-08-26 09:00:40,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 09:00:40,969 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 16 [2021-08-26 09:00:40,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 09:00:40,970 INFO L225 Difference]: With dead ends: 22 [2021-08-26 09:00:40,970 INFO L226 Difference]: Without dead ends: 18 [2021-08-26 09:00:40,972 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 89.8ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-26 09:00:40,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-08-26 09:00:40,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-08-26 09:00:40,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-26 09:00:40,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-08-26 09:00:40,977 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2021-08-26 09:00:40,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 09:00:40,978 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-08-26 09:00:40,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-26 09:00:40,978 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-08-26 09:00:40,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-26 09:00:40,979 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 09:00:40,979 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 09:00:40,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-26 09:00:41,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:00:41,193 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 09:00:41,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 09:00:41,194 INFO L82 PathProgramCache]: Analyzing trace with hash -41010676, now seen corresponding path program 2 times [2021-08-26 09:00:41,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 09:00:41,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101141209] [2021-08-26 09:00:41,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:00:41,194 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 09:00:41,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:41,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:41,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:41,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:41,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:41,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:41,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:41,342 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-26 09:00:41,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 09:00:41,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101141209] [2021-08-26 09:00:41,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101141209] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:00:41,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744963407] [2021-08-26 09:00:41,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 09:00:41,342 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:00:41,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 09:00:41,353 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 09:00:41,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-26 09:00:41,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 09:00:41,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 09:00:41,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-26 09:00:41,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 09:00:41,587 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-26 09:00:41,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744963407] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:00:41,588 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 09:00:41,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-26 09:00:41,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335005921] [2021-08-26 09:00:41,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-26 09:00:41,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 09:00:41,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-26 09:00:41,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-26 09:00:41,589 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 9 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-08-26 09:00:41,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 09:00:41,670 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2021-08-26 09:00:41,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-26 09:00:41,670 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 9 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 22 [2021-08-26 09:00:41,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 09:00:41,671 INFO L225 Difference]: With dead ends: 25 [2021-08-26 09:00:41,671 INFO L226 Difference]: Without dead ends: 21 [2021-08-26 09:00:41,672 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 89.0ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-26 09:00:41,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-08-26 09:00:41,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-08-26 09:00:41,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-08-26 09:00:41,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-08-26 09:00:41,675 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2021-08-26 09:00:41,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 09:00:41,675 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-08-26 09:00:41,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 9 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-08-26 09:00:41,675 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-08-26 09:00:41,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-26 09:00:41,676 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 09:00:41,676 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 09:00:41,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-26 09:00:41,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-08-26 09:00:41,897 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 09:00:41,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 09:00:41,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 3 times [2021-08-26 09:00:41,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 09:00:41,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891737888] [2021-08-26 09:00:41,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:00:41,898 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 09:00:41,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:41,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:41,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:41,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:41,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:41,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:41,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:41,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:41,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:41,988 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-26 09:00:41,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 09:00:41,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891737888] [2021-08-26 09:00:41,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891737888] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:00:41,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452924082] [2021-08-26 09:00:41,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 09:00:41,989 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:00:41,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 09:00:41,990 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 09:00:41,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-26 09:00:42,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-26 09:00:42,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 09:00:42,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-26 09:00:42,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 09:00:42,234 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-26 09:00:42,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452924082] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:00:42,235 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 09:00:42,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-08-26 09:00:42,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914886666] [2021-08-26 09:00:42,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-26 09:00:42,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 09:00:42,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-26 09:00:42,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-08-26 09:00:42,236 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (4), 1 states have call predecessors, (4), 8 states have return successors, (8), 8 states have call predecessors, (8), 3 states have call successors, (8) [2021-08-26 09:00:42,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 09:00:42,387 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-08-26 09:00:42,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-26 09:00:42,388 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (4), 1 states have call predecessors, (4), 8 states have return successors, (8), 8 states have call predecessors, (8), 3 states have call successors, (8) Word has length 28 [2021-08-26 09:00:42,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 09:00:42,388 INFO L225 Difference]: With dead ends: 28 [2021-08-26 09:00:42,389 INFO L226 Difference]: Without dead ends: 24 [2021-08-26 09:00:42,389 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 176.5ms TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-08-26 09:00:42,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-08-26 09:00:42,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-08-26 09:00:42,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.0625) internal successors, (17), 17 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2021-08-26 09:00:42,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-08-26 09:00:42,392 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2021-08-26 09:00:42,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 09:00:42,393 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-08-26 09:00:42,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (4), 1 states have call predecessors, (4), 8 states have return successors, (8), 8 states have call predecessors, (8), 3 states have call successors, (8) [2021-08-26 09:00:42,393 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-08-26 09:00:42,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-26 09:00:42,394 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 09:00:42,394 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 09:00:42,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-26 09:00:42,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:00:42,615 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 09:00:42,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 09:00:42,616 INFO L82 PathProgramCache]: Analyzing trace with hash 371264716, now seen corresponding path program 4 times [2021-08-26 09:00:42,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 09:00:42,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404131043] [2021-08-26 09:00:42,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:00:42,616 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 09:00:42,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:42,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:42,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:42,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:42,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:42,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:42,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:42,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:42,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:42,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:42,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:42,766 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-08-26 09:00:42,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 09:00:42,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404131043] [2021-08-26 09:00:42,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404131043] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:00:42,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746690434] [2021-08-26 09:00:42,767 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 09:00:42,767 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:00:42,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 09:00:42,769 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 09:00:42,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-26 09:00:42,840 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 09:00:42,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 09:00:42,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-26 09:00:42,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 09:00:43,036 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-08-26 09:00:43,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746690434] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:00:43,037 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 09:00:43,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-08-26 09:00:43,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081707900] [2021-08-26 09:00:43,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-26 09:00:43,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 09:00:43,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-26 09:00:43,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-08-26 09:00:43,039 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2021-08-26 09:00:43,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 09:00:43,097 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-08-26 09:00:43,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-26 09:00:43,098 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) Word has length 34 [2021-08-26 09:00:43,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 09:00:43,099 INFO L225 Difference]: With dead ends: 31 [2021-08-26 09:00:43,099 INFO L226 Difference]: Without dead ends: 27 [2021-08-26 09:00:43,099 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 100.1ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-08-26 09:00:43,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-08-26 09:00:43,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-08-26 09:00:43,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 19 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2021-08-26 09:00:43,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-08-26 09:00:43,102 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2021-08-26 09:00:43,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 09:00:43,103 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-08-26 09:00:43,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2021-08-26 09:00:43,103 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-08-26 09:00:43,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-26 09:00:43,104 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 09:00:43,104 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 09:00:43,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-26 09:00:43,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:00:43,321 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 09:00:43,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 09:00:43,322 INFO L82 PathProgramCache]: Analyzing trace with hash -886339242, now seen corresponding path program 5 times [2021-08-26 09:00:43,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 09:00:43,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530162823] [2021-08-26 09:00:43,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:00:43,322 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 09:00:43,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:43,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:43,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:43,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:43,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:43,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:43,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:43,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:43,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:43,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:43,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:43,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:43,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:43,436 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-08-26 09:00:43,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 09:00:43,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530162823] [2021-08-26 09:00:43,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530162823] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:00:43,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012585864] [2021-08-26 09:00:43,437 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 09:00:43,437 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:00:43,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 09:00:43,449 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 09:00:43,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-26 09:00:43,551 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-26 09:00:43,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 09:00:43,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-26 09:00:43,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 09:00:43,700 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-08-26 09:00:43,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012585864] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:00:43,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 09:00:43,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-08-26 09:00:43,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997390521] [2021-08-26 09:00:43,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-26 09:00:43,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 09:00:43,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-26 09:00:43,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-26 09:00:43,702 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 12 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 7 states have return successors, (11), 6 states have call predecessors, (11), 3 states have call successors, (11) [2021-08-26 09:00:43,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 09:00:43,774 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2021-08-26 09:00:43,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-26 09:00:43,774 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 12 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 7 states have return successors, (11), 6 states have call predecessors, (11), 3 states have call successors, (11) Word has length 40 [2021-08-26 09:00:43,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 09:00:43,775 INFO L225 Difference]: With dead ends: 34 [2021-08-26 09:00:43,775 INFO L226 Difference]: Without dead ends: 30 [2021-08-26 09:00:43,775 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 84.5ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-08-26 09:00:43,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-08-26 09:00:43,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-08-26 09:00:43,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.05) internal successors, (21), 21 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2021-08-26 09:00:43,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-08-26 09:00:43,779 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2021-08-26 09:00:43,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 09:00:43,779 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-08-26 09:00:43,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 12 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 7 states have return successors, (11), 6 states have call predecessors, (11), 3 states have call successors, (11) [2021-08-26 09:00:43,779 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-08-26 09:00:43,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-26 09:00:43,780 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 09:00:43,780 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 09:00:43,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-08-26 09:00:43,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:00:43,989 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 09:00:43,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 09:00:43,990 INFO L82 PathProgramCache]: Analyzing trace with hash -918712436, now seen corresponding path program 6 times [2021-08-26 09:00:43,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 09:00:43,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967403775] [2021-08-26 09:00:43,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:00:43,990 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 09:00:43,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:44,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:44,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:44,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:44,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:44,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:44,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:44,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:44,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:44,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:44,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:44,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:44,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:44,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:44,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:44,145 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-08-26 09:00:44,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 09:00:44,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967403775] [2021-08-26 09:00:44,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967403775] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:00:44,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897002119] [2021-08-26 09:00:44,146 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 09:00:44,146 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:00:44,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 09:00:44,147 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 09:00:44,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-26 09:00:44,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-26 09:00:44,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 09:00:44,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-26 09:00:44,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 09:00:44,530 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-08-26 09:00:44,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897002119] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:00:44,530 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 09:00:44,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 26 [2021-08-26 09:00:44,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491576381] [2021-08-26 09:00:44,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-26 09:00:44,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 09:00:44,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-26 09:00:44,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-08-26 09:00:44,532 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 26 states, 25 states have (on average 1.6) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (4), 1 states have call predecessors, (4), 14 states have return successors, (14), 14 states have call predecessors, (14), 3 states have call successors, (14) [2021-08-26 09:00:44,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 09:00:44,774 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2021-08-26 09:00:44,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-26 09:00:44,774 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.6) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (4), 1 states have call predecessors, (4), 14 states have return successors, (14), 14 states have call predecessors, (14), 3 states have call successors, (14) Word has length 46 [2021-08-26 09:00:44,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 09:00:44,775 INFO L225 Difference]: With dead ends: 37 [2021-08-26 09:00:44,775 INFO L226 Difference]: Without dead ends: 33 [2021-08-26 09:00:44,776 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 332.2ms TimeCoverageRelationStatistics Valid=279, Invalid=1203, Unknown=0, NotChecked=0, Total=1482 [2021-08-26 09:00:44,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-08-26 09:00:44,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-08-26 09:00:44,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2021-08-26 09:00:44,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-08-26 09:00:44,780 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2021-08-26 09:00:44,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 09:00:44,780 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-08-26 09:00:44,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.6) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (4), 1 states have call predecessors, (4), 14 states have return successors, (14), 14 states have call predecessors, (14), 3 states have call successors, (14) [2021-08-26 09:00:44,780 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-08-26 09:00:44,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-26 09:00:44,781 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 09:00:44,781 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 09:00:44,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-26 09:00:44,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:00:44,997 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 09:00:44,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 09:00:44,998 INFO L82 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 7 times [2021-08-26 09:00:44,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 09:00:44,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070590018] [2021-08-26 09:00:44,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:00:44,998 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 09:00:45,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:45,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:45,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:45,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:45,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:45,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:45,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:45,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:45,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:45,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:45,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:45,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:45,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:45,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:45,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:45,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:45,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:45,165 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-08-26 09:00:45,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 09:00:45,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070590018] [2021-08-26 09:00:45,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070590018] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:00:45,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991155234] [2021-08-26 09:00:45,168 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 09:00:45,168 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:00:45,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 09:00:45,169 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 09:00:45,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-26 09:00:45,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:45,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-26 09:00:45,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 09:00:45,503 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-08-26 09:00:45,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991155234] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:00:45,503 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 09:00:45,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-08-26 09:00:45,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030208137] [2021-08-26 09:00:45,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-26 09:00:45,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 09:00:45,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-26 09:00:45,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-08-26 09:00:45,504 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 14 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 9 states have return successors, (15), 8 states have call predecessors, (15), 3 states have call successors, (15) [2021-08-26 09:00:45,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 09:00:45,596 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2021-08-26 09:00:45,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-26 09:00:45,597 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 14 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 9 states have return successors, (15), 8 states have call predecessors, (15), 3 states have call successors, (15) Word has length 52 [2021-08-26 09:00:45,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 09:00:45,598 INFO L225 Difference]: With dead ends: 40 [2021-08-26 09:00:45,598 INFO L226 Difference]: Without dead ends: 36 [2021-08-26 09:00:45,598 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 103.4ms TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2021-08-26 09:00:45,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-08-26 09:00:45,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-08-26 09:00:45,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 25 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (10), 9 states have call predecessors, (10), 2 states have call successors, (10) [2021-08-26 09:00:45,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-08-26 09:00:45,602 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2021-08-26 09:00:45,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 09:00:45,602 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-08-26 09:00:45,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 14 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 9 states have return successors, (15), 8 states have call predecessors, (15), 3 states have call successors, (15) [2021-08-26 09:00:45,602 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-08-26 09:00:45,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-08-26 09:00:45,603 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 09:00:45,603 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 09:00:45,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-26 09:00:45,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:00:45,821 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 09:00:45,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 09:00:45,821 INFO L82 PathProgramCache]: Analyzing trace with hash -960511412, now seen corresponding path program 8 times [2021-08-26 09:00:45,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 09:00:45,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802786064] [2021-08-26 09:00:45,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:00:45,821 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 09:00:45,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:45,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:45,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:45,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:45,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:45,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:45,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:45,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:45,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:45,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:45,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:45,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:45,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:45,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:45,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:45,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:45,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:45,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:45,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:45,971 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-08-26 09:00:45,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 09:00:45,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802786064] [2021-08-26 09:00:45,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802786064] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:00:45,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031594888] [2021-08-26 09:00:45,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 09:00:45,972 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:00:45,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 09:00:45,973 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 09:00:45,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-26 09:00:46,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 09:00:46,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 09:00:46,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-26 09:00:46,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 09:00:46,331 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-08-26 09:00:46,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031594888] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:00:46,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 09:00:46,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-08-26 09:00:46,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777848658] [2021-08-26 09:00:46,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-26 09:00:46,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 09:00:46,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-26 09:00:46,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-08-26 09:00:46,334 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 15 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 10 states have return successors, (17), 9 states have call predecessors, (17), 3 states have call successors, (17) [2021-08-26 09:00:46,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 09:00:46,444 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2021-08-26 09:00:46,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-26 09:00:46,444 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 15 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 10 states have return successors, (17), 9 states have call predecessors, (17), 3 states have call successors, (17) Word has length 58 [2021-08-26 09:00:46,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 09:00:46,445 INFO L225 Difference]: With dead ends: 43 [2021-08-26 09:00:46,445 INFO L226 Difference]: Without dead ends: 39 [2021-08-26 09:00:46,445 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 113.9ms TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2021-08-26 09:00:46,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-08-26 09:00:46,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-08-26 09:00:46,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 27 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (11), 10 states have call predecessors, (11), 2 states have call successors, (11) [2021-08-26 09:00:46,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-08-26 09:00:46,448 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2021-08-26 09:00:46,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 09:00:46,448 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-08-26 09:00:46,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 15 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 10 states have return successors, (17), 9 states have call predecessors, (17), 3 states have call successors, (17) [2021-08-26 09:00:46,449 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-08-26 09:00:46,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-08-26 09:00:46,449 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 09:00:46,449 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 09:00:46,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-26 09:00:46,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-08-26 09:00:46,650 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 09:00:46,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 09:00:46,650 INFO L82 PathProgramCache]: Analyzing trace with hash -366706730, now seen corresponding path program 9 times [2021-08-26 09:00:46,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 09:00:46,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675793627] [2021-08-26 09:00:46,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:00:46,651 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 09:00:46,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:46,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:46,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:46,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:46,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:46,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:46,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:46,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:46,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:46,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:46,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:46,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:46,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:46,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:46,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:46,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:46,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:46,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:46,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:46,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-26 09:00:46,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 09:00:46,870 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-08-26 09:00:46,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 09:00:46,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675793627] [2021-08-26 09:00:46,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675793627] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:00:46,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56610095] [2021-08-26 09:00:46,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 09:00:46,870 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 09:00:46,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 09:00:46,871 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 09:00:46,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-26 09:00:47,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-08-26 09:00:47,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 09:00:47,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-26 09:00:47,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 09:00:47,469 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-08-26 09:00:47,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56610095] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 09:00:47,469 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 09:00:47,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 35 [2021-08-26 09:00:47,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219071337] [2021-08-26 09:00:47,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-26 09:00:47,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 09:00:47,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-26 09:00:47,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=997, Unknown=0, NotChecked=0, Total=1190 [2021-08-26 09:00:47,471 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 35 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (4), 1 states have call predecessors, (4), 20 states have return successors, (20), 20 states have call predecessors, (20), 3 states have call successors, (20) [2021-08-26 09:00:47,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 09:00:47,783 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2021-08-26 09:00:47,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-26 09:00:47,784 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (4), 1 states have call predecessors, (4), 20 states have return successors, (20), 20 states have call predecessors, (20), 3 states have call successors, (20) Word has length 64 [2021-08-26 09:00:47,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 09:00:47,788 INFO L225 Difference]: With dead ends: 46 [2021-08-26 09:00:47,788 INFO L226 Difference]: Without dead ends: 42 [2021-08-26 09:00:47,789 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 551.2ms TimeCoverageRelationStatistics Valid=531, Invalid=2331, Unknown=0, NotChecked=0, Total=2862 [2021-08-26 09:00:47,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-08-26 09:00:47,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-08-26 09:00:47,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 29 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (12), 11 states have call predecessors, (12), 2 states have call successors, (12) [2021-08-26 09:00:47,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-08-26 09:00:47,804 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2021-08-26 09:00:47,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 09:00:47,804 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-08-26 09:00:47,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (4), 1 states have call predecessors, (4), 20 states have return successors, (20), 20 states have call predecessors, (20), 3 states have call successors, (20) [2021-08-26 09:00:47,804 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-08-26 09:00:47,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-08-26 09:00:47,807 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 09:00:47,808 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 09:00:47,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-26 09:00:48,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-26 09:00:48,025 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 09:00:48,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 09:00:48,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1719425780, now seen corresponding path program 10 times [2021-08-26 09:00:48,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 09:00:48,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928045179] [2021-08-26 09:00:48,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 09:00:48,025 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 09:00:48,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 09:00:48,034 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-26 09:00:48,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 09:00:48,066 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-26 09:00:48,066 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-26 09:00:48,067 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 09:00:48,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-26 09:00:48,073 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 09:00:48,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 09:00:48 BoogieIcfgContainer [2021-08-26 09:00:48,120 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 09:00:48,120 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 09:00:48,120 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 09:00:48,120 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 09:00:48,121 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 09:00:40" (3/4) ... [2021-08-26 09:00:48,122 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-26 09:00:48,153 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 09:00:48,153 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 09:00:48,154 INFO L168 Benchmark]: Toolchain (without parser) took 8546.80 ms. Allocated memory was 50.3 MB in the beginning and 107.0 MB in the end (delta: 56.6 MB). Free memory was 27.2 MB in the beginning and 56.2 MB in the end (delta: -29.0 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. [2021-08-26 09:00:48,154 INFO L168 Benchmark]: CDTParser took 0.52 ms. Allocated memory is still 50.3 MB. Free memory was 31.7 MB in the beginning and 31.7 MB in the end (delta: 26.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 09:00:48,154 INFO L168 Benchmark]: CACSL2BoogieTranslator took 178.06 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 27.0 MB in the beginning and 39.5 MB in the end (delta: -12.5 MB). Peak memory consumption was 5.3 MB. Max. memory is 16.1 GB. [2021-08-26 09:00:48,155 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.39 ms. Allocated memory is still 60.8 MB. Free memory was 39.5 MB in the beginning and 44.3 MB in the end (delta: -4.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-26 09:00:48,155 INFO L168 Benchmark]: Boogie Preprocessor took 24.83 ms. Allocated memory is still 60.8 MB. Free memory was 44.3 MB in the beginning and 43.5 MB in the end (delta: 857.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 09:00:48,155 INFO L168 Benchmark]: RCFGBuilder took 220.88 ms. Allocated memory is still 60.8 MB. Free memory was 43.3 MB in the beginning and 32.2 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-08-26 09:00:48,155 INFO L168 Benchmark]: TraceAbstraction took 8037.63 ms. Allocated memory was 60.8 MB in the beginning and 107.0 MB in the end (delta: 46.1 MB). Free memory was 31.9 MB in the beginning and 59.4 MB in the end (delta: -27.5 MB). Peak memory consumption was 19.5 MB. Max. memory is 16.1 GB. [2021-08-26 09:00:48,156 INFO L168 Benchmark]: Witness Printer took 33.07 ms. Allocated memory is still 107.0 MB. Free memory was 59.4 MB in the beginning and 56.2 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-26 09:00:48,157 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.52 ms. Allocated memory is still 50.3 MB. Free memory was 31.7 MB in the beginning and 31.7 MB in the end (delta: 26.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 178.06 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 27.0 MB in the beginning and 39.5 MB in the end (delta: -12.5 MB). Peak memory consumption was 5.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 45.39 ms. Allocated memory is still 60.8 MB. Free memory was 39.5 MB in the beginning and 44.3 MB in the end (delta: -4.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.83 ms. Allocated memory is still 60.8 MB. Free memory was 44.3 MB in the beginning and 43.5 MB in the end (delta: 857.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 220.88 ms. Allocated memory is still 60.8 MB. Free memory was 43.3 MB in the beginning and 32.2 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 8037.63 ms. Allocated memory was 60.8 MB in the beginning and 107.0 MB in the end (delta: 46.1 MB). Free memory was 31.9 MB in the beginning and 59.4 MB in the end (delta: -27.5 MB). Peak memory consumption was 19.5 MB. Max. memory is 16.1 GB. * Witness Printer took 33.07 ms. Allocated memory is still 107.0 MB. Free memory was 59.4 MB in the beginning and 56.2 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L12] int input = 10; [L13] CALL, EXPR id(input) VAL [\old(x)=10] [L7] COND FALSE !(x==0) VAL [\old(x)=10, x=10] [L8] CALL, EXPR id(x-1) VAL [\old(x)=9] [L7] COND FALSE !(x==0) VAL [\old(x)=9, x=9] [L8] CALL, EXPR id(x-1) VAL [\old(x)=8] [L7] COND FALSE !(x==0) VAL [\old(x)=8, x=8] [L8] CALL, EXPR id(x-1) VAL [\old(x)=7] [L7] COND FALSE !(x==0) VAL [\old(x)=7, x=7] [L8] CALL, EXPR id(x-1) VAL [\old(x)=6] [L7] COND FALSE !(x==0) VAL [\old(x)=6, x=6] [L8] CALL, EXPR id(x-1) VAL [\old(x)=5] [L7] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L8] CALL, EXPR id(x-1) VAL [\old(x)=4] [L7] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L8] CALL, EXPR id(x-1) VAL [\old(x)=3] [L7] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L8] CALL, EXPR id(x-1) VAL [\old(x)=2] [L7] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L8] CALL, EXPR id(x-1) VAL [\old(x)=1] [L7] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L8] CALL, EXPR id(x-1) VAL [\old(x)=0] [L7] COND TRUE x==0 [L7] return 0; VAL [\old(x)=0, \result=0, x=0] [L8] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=5, id(x-1)=4, x=5] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=6, id(x-1)=5, x=6] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=7, id(x-1)=6, x=7] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=8, id(x-1)=7, x=8] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=9, id(x-1)=8, x=9] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=10, id(x-1)=9, x=10] [L8] return id(x-1) + 1; [L13] RET, EXPR id(input) [L13] int result = id(input); [L14] COND TRUE result == 10 [L15] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 7951.9ms, OverallIterations: 11, TraceHistogramMax: 11, EmptinessCheckTime: 16.1ms, AutomataDifference: 1307.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 102 SDtfs, 178 SDslu, 521 SDs, 0 SdLazy, 480 SolverSat, 69 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 400.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 619 GetRequests, 415 SyntacticMatches, 0 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 1663.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=10, InterpolantAutomatonStates: 113, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 58.8ms AutomataMinimizationTime, 10 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 96.7ms SsaConstructionTime, 282.9ms SatisfiabilityAnalysisTime, 3397.8ms InterpolantComputationTime, 800 NumberOfCodeBlocks, 794 NumberOfCodeBlocksAsserted, 45 NumberOfCheckSat, 711 ConstructedInterpolants, 0 QuantifiedInterpolants, 1691 SizeOfPredicates, 33 NumberOfNonLiveVariables, 1058 ConjunctsInSsa, 126 ConjunctsInUnsatCore, 19 InterpolantComputations, 1 PerfectInterpolantSequences, 900/1800 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-08-26 09:00:48,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...