./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_copy5_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 574ddb4e 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/array-examples/standard_copy5_ground-2.i -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 0541c5d3cb2bb522edbd5a6d03bcb344a1d82e4bcd281d695c3c7a0d3bc33956 --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 09:38:57,890 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 09:38:57,893 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 09:38:57,931 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 09:38:57,932 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 09:38:57,935 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 09:38:57,936 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 09:38:57,939 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 09:38:57,941 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 09:38:57,945 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 09:38:57,946 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 09:38:57,948 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 09:38:57,949 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 09:38:57,951 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 09:38:57,952 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 09:38:57,954 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 09:38:57,955 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 09:38:57,957 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 09:38:57,958 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 09:38:57,963 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 09:38:57,964 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 09:38:57,965 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 09:38:57,966 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 09:38:57,967 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 09:38:57,974 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 09:38:57,975 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 09:38:57,975 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 09:38:57,976 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 09:38:57,977 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 09:38:57,978 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 09:38:57,978 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 09:38:57,978 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 09:38:57,980 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 09:38:57,980 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 09:38:57,982 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 09:38:57,982 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 09:38:57,983 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 09:38:57,983 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 09:38:57,983 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 09:38:57,984 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 09:38:57,985 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 09:38:57,986 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 09:38:58,016 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 09:38:58,016 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 09:38:58,017 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 09:38:58,017 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 09:38:58,018 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 09:38:58,018 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 09:38:58,019 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 09:38:58,019 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 09:38:58,019 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 09:38:58,019 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 09:38:58,020 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 09:38:58,020 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 09:38:58,021 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 09:38:58,021 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 09:38:58,021 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 09:38:58,021 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 09:38:58,021 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 09:38:58,021 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 09:38:58,022 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 09:38:58,022 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 09:38:58,022 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 09:38:58,022 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 09:38:58,022 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 09:38:58,023 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 09:38:58,023 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 09:38:58,023 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 09:38:58,023 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 09:38:58,023 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 09:38:58,024 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 09:38:58,024 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 09:38:58,024 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 09:38:58,024 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 09:38:58,024 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 09:38:58,025 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 09:38:58,025 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 09:38:58,025 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0541c5d3cb2bb522edbd5a6d03bcb344a1d82e4bcd281d695c3c7a0d3bc33956 [2023-02-18 09:38:58,241 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 09:38:58,275 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 09:38:58,277 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 09:38:58,279 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 09:38:58,279 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 09:38:58,281 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_copy5_ground-2.i [2023-02-18 09:38:59,463 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 09:38:59,612 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 09:38:59,613 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy5_ground-2.i [2023-02-18 09:38:59,617 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b881f5a6f/7eb99268006643e0a84d86c5bdea5a4e/FLAG8de86feae [2023-02-18 09:38:59,629 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b881f5a6f/7eb99268006643e0a84d86c5bdea5a4e [2023-02-18 09:38:59,631 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 09:38:59,632 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 09:38:59,633 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 09:38:59,633 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 09:38:59,639 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 09:38:59,640 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 09:38:59" (1/1) ... [2023-02-18 09:38:59,641 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5aa62f7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:38:59, skipping insertion in model container [2023-02-18 09:38:59,641 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 09:38:59" (1/1) ... [2023-02-18 09:38:59,648 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 09:38:59,664 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 09:38:59,806 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy5_ground-2.i[816,829] [2023-02-18 09:38:59,839 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 09:38:59,847 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 09:38:59,861 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy5_ground-2.i[816,829] [2023-02-18 09:38:59,891 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 09:38:59,902 INFO L208 MainTranslator]: Completed translation [2023-02-18 09:38:59,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:38:59 WrapperNode [2023-02-18 09:38:59,904 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 09:38:59,905 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 09:38:59,905 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 09:38:59,905 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 09:38:59,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:38:59" (1/1) ... [2023-02-18 09:38:59,925 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:38:59" (1/1) ... [2023-02-18 09:38:59,952 INFO L138 Inliner]: procedures = 16, calls = 39, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 131 [2023-02-18 09:38:59,952 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 09:38:59,953 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 09:38:59,953 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 09:38:59,953 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 09:38:59,961 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:38:59" (1/1) ... [2023-02-18 09:38:59,961 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:38:59" (1/1) ... [2023-02-18 09:38:59,972 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:38:59" (1/1) ... [2023-02-18 09:38:59,973 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:38:59" (1/1) ... [2023-02-18 09:38:59,981 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:38:59" (1/1) ... [2023-02-18 09:38:59,989 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:38:59" (1/1) ... [2023-02-18 09:38:59,994 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:38:59" (1/1) ... [2023-02-18 09:38:59,997 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:38:59" (1/1) ... [2023-02-18 09:38:59,999 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 09:39:00,001 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 09:39:00,001 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 09:39:00,001 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 09:39:00,002 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:38:59" (1/1) ... [2023-02-18 09:39:00,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 09:39:00,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 09:39:00,034 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) [2023-02-18 09:39:00,067 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 [2023-02-18 09:39:00,082 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 09:39:00,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 09:39:00,083 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-18 09:39:00,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-18 09:39:00,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 09:39:00,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 09:39:00,083 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-18 09:39:00,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-18 09:39:00,166 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 09:39:00,170 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 09:39:00,405 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 09:39:00,410 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 09:39:00,410 INFO L300 CfgBuilder]: Removed 7 assume(true) statements. [2023-02-18 09:39:00,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 09:39:00 BoogieIcfgContainer [2023-02-18 09:39:00,412 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 09:39:00,413 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 09:39:00,422 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 09:39:00,425 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 09:39:00,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 09:38:59" (1/3) ... [2023-02-18 09:39:00,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@128a94e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 09:39:00, skipping insertion in model container [2023-02-18 09:39:00,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:38:59" (2/3) ... [2023-02-18 09:39:00,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@128a94e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 09:39:00, skipping insertion in model container [2023-02-18 09:39:00,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 09:39:00" (3/3) ... [2023-02-18 09:39:00,428 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copy5_ground-2.i [2023-02-18 09:39:00,452 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 09:39:00,452 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 09:39:00,502 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 09:39:00,508 INFO L357 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, mAutomataTypeConcurrency=PETRI_NET, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2b8d2226, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 09:39:00,510 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 09:39:00,513 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 29 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:39:00,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-18 09:39:00,520 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 09:39:00,521 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 09:39:00,522 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 09:39:00,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 09:39:00,528 INFO L85 PathProgramCache]: Analyzing trace with hash -18882701, now seen corresponding path program 1 times [2023-02-18 09:39:00,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 09:39:00,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425343360] [2023-02-18 09:39:00,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 09:39:00,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 09:39:00,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 09:39:00,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 09:39:00,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 09:39:00,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425343360] [2023-02-18 09:39:00,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425343360] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 09:39:00,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 09:39:00,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 09:39:00,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037006057] [2023-02-18 09:39:00,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 09:39:00,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 09:39:00,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 09:39:00,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 09:39:00,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 09:39:00,806 INFO L87 Difference]: Start difference. First operand has 30 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 29 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:39:00,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 09:39:00,854 INFO L93 Difference]: Finished difference Result 58 states and 86 transitions. [2023-02-18 09:39:00,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 09:39:00,857 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-02-18 09:39:00,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 09:39:00,864 INFO L225 Difference]: With dead ends: 58 [2023-02-18 09:39:00,864 INFO L226 Difference]: Without dead ends: 28 [2023-02-18 09:39:00,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 09:39:00,871 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 1 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 09:39:00,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 66 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 09:39:00,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-02-18 09:39:00,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2023-02-18 09:39:00,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:39:00,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2023-02-18 09:39:00,903 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 17 [2023-02-18 09:39:00,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 09:39:00,903 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2023-02-18 09:39:00,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:39:00,904 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2023-02-18 09:39:00,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-18 09:39:00,904 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 09:39:00,905 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 09:39:00,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 09:39:00,905 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 09:39:00,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 09:39:00,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1592499797, now seen corresponding path program 1 times [2023-02-18 09:39:00,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 09:39:00,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137005925] [2023-02-18 09:39:00,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 09:39:00,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 09:39:00,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 09:39:01,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 09:39:01,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 09:39:01,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137005925] [2023-02-18 09:39:01,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137005925] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 09:39:01,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643366529] [2023-02-18 09:39:01,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 09:39:01,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 09:39:01,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 09:39:01,021 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) [2023-02-18 09:39:01,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 09:39:01,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 09:39:01,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-18 09:39:01,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 09:39:01,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 09:39:01,144 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 09:39:01,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643366529] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 09:39:01,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 09:39:01,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-02-18 09:39:01,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711955906] [2023-02-18 09:39:01,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 09:39:01,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 09:39:01,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 09:39:01,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 09:39:01,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-18 09:39:01,147 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:39:01,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 09:39:01,204 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2023-02-18 09:39:01,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 09:39:01,205 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-02-18 09:39:01,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 09:39:01,207 INFO L225 Difference]: With dead ends: 56 [2023-02-18 09:39:01,209 INFO L226 Difference]: Without dead ends: 37 [2023-02-18 09:39:01,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-18 09:39:01,211 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 5 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 09:39:01,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 33 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 09:39:01,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-02-18 09:39:01,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2023-02-18 09:39:01,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:39:01,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2023-02-18 09:39:01,224 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 19 [2023-02-18 09:39:01,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 09:39:01,225 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2023-02-18 09:39:01,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:39:01,226 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2023-02-18 09:39:01,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-18 09:39:01,227 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 09:39:01,228 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 09:39:01,235 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-18 09:39:01,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 09:39:01,435 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 09:39:01,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 09:39:01,436 INFO L85 PathProgramCache]: Analyzing trace with hash 722749857, now seen corresponding path program 1 times [2023-02-18 09:39:01,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 09:39:01,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319949981] [2023-02-18 09:39:01,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 09:39:01,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 09:39:01,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 09:39:01,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 09:39:01,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 09:39:01,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319949981] [2023-02-18 09:39:01,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319949981] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 09:39:01,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277720140] [2023-02-18 09:39:01,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 09:39:01,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 09:39:01,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 09:39:01,584 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) [2023-02-18 09:39:01,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 09:39:01,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 09:39:01,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-18 09:39:01,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 09:39:01,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 09:39:01,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 09:39:01,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 09:39:01,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277720140] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 09:39:01,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 09:39:01,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-18 09:39:01,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062978791] [2023-02-18 09:39:01,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 09:39:01,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 09:39:01,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 09:39:01,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 09:39:01,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-18 09:39:01,718 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:39:01,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 09:39:01,744 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2023-02-18 09:39:01,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 09:39:01,744 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-02-18 09:39:01,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 09:39:01,745 INFO L225 Difference]: With dead ends: 65 [2023-02-18 09:39:01,745 INFO L226 Difference]: Without dead ends: 38 [2023-02-18 09:39:01,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-18 09:39:01,747 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 2 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 09:39:01,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 86 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 09:39:01,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-02-18 09:39:01,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-02-18 09:39:01,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 37 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:39:01,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2023-02-18 09:39:01,753 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 29 [2023-02-18 09:39:01,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 09:39:01,754 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2023-02-18 09:39:01,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:39:01,754 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2023-02-18 09:39:01,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-18 09:39:01,755 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 09:39:01,755 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 09:39:01,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-18 09:39:01,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-02-18 09:39:01,962 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 09:39:01,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 09:39:01,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1141885403, now seen corresponding path program 2 times [2023-02-18 09:39:01,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 09:39:01,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998109005] [2023-02-18 09:39:01,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 09:39:01,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 09:39:02,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 09:39:02,095 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-18 09:39:02,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 09:39:02,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998109005] [2023-02-18 09:39:02,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998109005] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 09:39:02,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029767951] [2023-02-18 09:39:02,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 09:39:02,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 09:39:02,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 09:39:02,098 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) [2023-02-18 09:39:02,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 09:39:02,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 09:39:02,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 09:39:02,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-18 09:39:02,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 09:39:02,287 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 09:39:02,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 09:39:02,348 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 09:39:02,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029767951] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 09:39:02,349 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 09:39:02,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2023-02-18 09:39:02,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802330246] [2023-02-18 09:39:02,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 09:39:02,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 09:39:02,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 09:39:02,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 09:39:02,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-18 09:39:02,354 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:39:02,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 09:39:02,491 INFO L93 Difference]: Finished difference Result 92 states and 114 transitions. [2023-02-18 09:39:02,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-18 09:39:02,491 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-02-18 09:39:02,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 09:39:02,494 INFO L225 Difference]: With dead ends: 92 [2023-02-18 09:39:02,494 INFO L226 Difference]: Without dead ends: 65 [2023-02-18 09:39:02,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-18 09:39:02,498 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 15 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 09:39:02,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 65 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 09:39:02,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-02-18 09:39:02,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 60. [2023-02-18 09:39:02,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.11864406779661) internal successors, (66), 59 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:39:02,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2023-02-18 09:39:02,514 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 35 [2023-02-18 09:39:02,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 09:39:02,514 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2023-02-18 09:39:02,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:39:02,515 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2023-02-18 09:39:02,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-18 09:39:02,517 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 09:39:02,517 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 09:39:02,526 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-18 09:39:02,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 09:39:02,724 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 09:39:02,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 09:39:02,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1504312005, now seen corresponding path program 3 times [2023-02-18 09:39:02,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 09:39:02,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445337021] [2023-02-18 09:39:02,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 09:39:02,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 09:39:02,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 09:39:03,018 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-18 09:39:03,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 09:39:03,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445337021] [2023-02-18 09:39:03,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445337021] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 09:39:03,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731746626] [2023-02-18 09:39:03,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 09:39:03,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 09:39:03,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 09:39:03,021 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) [2023-02-18 09:39:03,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 09:39:03,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-18 09:39:03,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 09:39:03,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-18 09:39:03,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 09:39:03,201 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2023-02-18 09:39:03,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 09:39:03,235 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2023-02-18 09:39:03,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731746626] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 09:39:03,236 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 09:39:03,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2023-02-18 09:39:03,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309776380] [2023-02-18 09:39:03,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 09:39:03,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-18 09:39:03,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 09:39:03,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-18 09:39:03,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-02-18 09:39:03,240 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:39:03,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 09:39:03,444 INFO L93 Difference]: Finished difference Result 140 states and 172 transitions. [2023-02-18 09:39:03,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-18 09:39:03,444 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2023-02-18 09:39:03,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 09:39:03,448 INFO L225 Difference]: With dead ends: 140 [2023-02-18 09:39:03,448 INFO L226 Difference]: Without dead ends: 103 [2023-02-18 09:39:03,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-02-18 09:39:03,450 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 43 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 09:39:03,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 65 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 09:39:03,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-02-18 09:39:03,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2023-02-18 09:39:03,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.0693069306930694) internal successors, (108), 101 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:39:03,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 108 transitions. [2023-02-18 09:39:03,477 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 108 transitions. Word has length 57 [2023-02-18 09:39:03,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 09:39:03,478 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 108 transitions. [2023-02-18 09:39:03,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:39:03,478 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 108 transitions. [2023-02-18 09:39:03,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-02-18 09:39:03,491 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 09:39:03,491 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 09:39:03,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-18 09:39:03,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 09:39:03,698 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 09:39:03,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 09:39:03,698 INFO L85 PathProgramCache]: Analyzing trace with hash 432076507, now seen corresponding path program 4 times [2023-02-18 09:39:03,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 09:39:03,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467006170] [2023-02-18 09:39:03,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 09:39:03,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 09:39:03,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 09:39:04,063 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-02-18 09:39:04,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 09:39:04,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467006170] [2023-02-18 09:39:04,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467006170] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 09:39:04,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299906439] [2023-02-18 09:39:04,065 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 09:39:04,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 09:39:04,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 09:39:04,069 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) [2023-02-18 09:39:04,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 09:39:04,242 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 09:39:04,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 09:39:04,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-18 09:39:04,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 09:39:04,336 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-02-18 09:39:04,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 09:39:04,523 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-02-18 09:39:04,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299906439] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 09:39:04,524 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 09:39:04,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2023-02-18 09:39:04,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591448328] [2023-02-18 09:39:04,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 09:39:04,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-18 09:39:04,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 09:39:04,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-18 09:39:04,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2023-02-18 09:39:04,529 INFO L87 Difference]: Start difference. First operand 102 states and 108 transitions. Second operand has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 27 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:39:04,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 09:39:04,600 INFO L93 Difference]: Finished difference Result 205 states and 229 transitions. [2023-02-18 09:39:04,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-18 09:39:04,600 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 27 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2023-02-18 09:39:04,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 09:39:04,601 INFO L225 Difference]: With dead ends: 205 [2023-02-18 09:39:04,601 INFO L226 Difference]: Without dead ends: 128 [2023-02-18 09:39:04,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 174 SyntacticMatches, 11 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2023-02-18 09:39:04,603 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 2 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 09:39:04,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 226 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 09:39:04,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-02-18 09:39:04,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2023-02-18 09:39:04,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.0551181102362204) internal successors, (134), 127 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:39:04,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 134 transitions. [2023-02-18 09:39:04,610 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 134 transitions. Word has length 99 [2023-02-18 09:39:04,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 09:39:04,610 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 134 transitions. [2023-02-18 09:39:04,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 27 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:39:04,611 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 134 transitions. [2023-02-18 09:39:04,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-02-18 09:39:04,612 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 09:39:04,612 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 09:39:04,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-18 09:39:04,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 09:39:04,820 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 09:39:04,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 09:39:04,820 INFO L85 PathProgramCache]: Analyzing trace with hash -450730367, now seen corresponding path program 5 times [2023-02-18 09:39:04,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 09:39:04,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179808308] [2023-02-18 09:39:04,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 09:39:04,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 09:39:04,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 09:39:05,790 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-02-18 09:39:05,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 09:39:05,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179808308] [2023-02-18 09:39:05,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179808308] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 09:39:05,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075057718] [2023-02-18 09:39:05,791 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 09:39:05,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 09:39:05,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 09:39:05,796 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) [2023-02-18 09:39:05,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process