./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive/Ackermann04.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a31fd051 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/Ackermann04.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 85f83c4bcdce9397140788b204098e14e4fa25f5b66f064340f4aaa544fbb462 --- Real Ultimate output --- This is Ultimate 0.2.2-?-a31fd05 [2023-02-15 12:36:33,859 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 12:36:33,861 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 12:36:33,894 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 12:36:33,895 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 12:36:33,897 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 12:36:33,899 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 12:36:33,901 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 12:36:33,903 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 12:36:33,907 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 12:36:33,908 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 12:36:33,910 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 12:36:33,910 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 12:36:33,912 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 12:36:33,913 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 12:36:33,914 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 12:36:33,915 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 12:36:33,916 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 12:36:33,917 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 12:36:33,921 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 12:36:33,922 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 12:36:33,923 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 12:36:33,925 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 12:36:33,925 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 12:36:33,932 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 12:36:33,932 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 12:36:33,932 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 12:36:33,934 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 12:36:33,934 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 12:36:33,935 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 12:36:33,936 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 12:36:33,936 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 12:36:33,937 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 12:36:33,938 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 12:36:33,939 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 12:36:33,939 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 12:36:33,939 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 12:36:33,940 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 12:36:33,940 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 12:36:33,940 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 12:36:33,941 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 12:36:33,942 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 12:36:33,975 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 12:36:33,976 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 12:36:33,976 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 12:36:33,976 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 12:36:33,977 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 12:36:33,977 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 12:36:33,978 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 12:36:33,978 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 12:36:33,978 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 12:36:33,978 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 12:36:33,979 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 12:36:33,979 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 12:36:33,979 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 12:36:33,979 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 12:36:33,979 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 12:36:33,980 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 12:36:33,980 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 12:36:33,980 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 12:36:33,980 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 12:36:33,980 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 12:36:33,980 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 12:36:33,981 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 12:36:33,981 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 12:36:33,981 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 12:36:33,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 12:36:33,981 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 12:36:33,981 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 12:36:33,981 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 12:36:33,982 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 12:36:33,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 12:36:33,982 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 12:36:33,982 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 12:36:33,983 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 12:36:33,983 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 12:36:33,983 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 12:36:33,983 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 85f83c4bcdce9397140788b204098e14e4fa25f5b66f064340f4aaa544fbb462 [2023-02-15 12:36:34,268 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 12:36:34,290 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 12:36:34,292 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 12:36:34,293 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 12:36:34,293 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 12:36:34,294 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Ackermann04.c [2023-02-15 12:36:35,490 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 12:36:35,648 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 12:36:35,648 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Ackermann04.c [2023-02-15 12:36:35,653 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f9b4b098/fc16ec82092447b0a9f65d1043f4f737/FLAGe2ea26b17 [2023-02-15 12:36:35,686 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f9b4b098/fc16ec82092447b0a9f65d1043f4f737 [2023-02-15 12:36:35,701 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 12:36:35,703 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 12:36:35,706 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 12:36:35,706 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 12:36:35,709 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 12:36:35,710 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 12:36:35" (1/1) ... [2023-02-15 12:36:35,710 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ff122d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:36:35, skipping insertion in model container [2023-02-15 12:36:35,711 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 12:36:35" (1/1) ... [2023-02-15 12:36:35,733 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 12:36:35,749 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 12:36:35,890 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/recursive/Ackermann04.c[1166,1179] [2023-02-15 12:36:35,894 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 12:36:35,903 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 12:36:35,919 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/recursive/Ackermann04.c[1166,1179] [2023-02-15 12:36:35,920 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 12:36:35,933 INFO L208 MainTranslator]: Completed translation [2023-02-15 12:36:35,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:36:35 WrapperNode [2023-02-15 12:36:35,934 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 12:36:35,935 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 12:36:35,935 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 12:36:35,935 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 12:36:35,941 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:36:35" (1/1) ... [2023-02-15 12:36:35,953 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:36:35" (1/1) ... [2023-02-15 12:36:35,967 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 32 [2023-02-15 12:36:35,968 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 12:36:35,969 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 12:36:35,969 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 12:36:35,969 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 12:36:35,976 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:36:35" (1/1) ... [2023-02-15 12:36:35,977 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:36:35" (1/1) ... [2023-02-15 12:36:35,984 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:36:35" (1/1) ... [2023-02-15 12:36:35,984 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:36:35" (1/1) ... [2023-02-15 12:36:35,994 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:36:35" (1/1) ... [2023-02-15 12:36:35,995 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:36:35" (1/1) ... [2023-02-15 12:36:35,997 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:36:35" (1/1) ... [2023-02-15 12:36:35,998 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:36:35" (1/1) ... [2023-02-15 12:36:36,002 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 12:36:36,003 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 12:36:36,003 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 12:36:36,003 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 12:36:36,004 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:36:35" (1/1) ... [2023-02-15 12:36:36,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 12:36:36,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:36:36,028 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) [2023-02-15 12:36:36,080 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 [2023-02-15 12:36:36,095 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 12:36:36,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 12:36:36,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 12:36:36,096 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2023-02-15 12:36:36,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2023-02-15 12:36:36,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 12:36:36,147 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 12:36:36,151 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 12:36:36,254 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 12:36:36,261 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 12:36:36,261 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2023-02-15 12:36:36,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 12:36:36 BoogieIcfgContainer [2023-02-15 12:36:36,263 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 12:36:36,265 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 12:36:36,265 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 12:36:36,268 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 12:36:36,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 12:36:35" (1/3) ... [2023-02-15 12:36:36,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53f969ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 12:36:36, skipping insertion in model container [2023-02-15 12:36:36,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:36:35" (2/3) ... [2023-02-15 12:36:36,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53f969ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 12:36:36, skipping insertion in model container [2023-02-15 12:36:36,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 12:36:36" (3/3) ... [2023-02-15 12:36:36,271 INFO L112 eAbstractionObserver]: Analyzing ICFG Ackermann04.c [2023-02-15 12:36:36,286 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 12:36:36,286 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 12:36:36,324 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 12:36:36,329 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;@2cd9a6e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 12:36:36,330 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 12:36:36,334 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 12:36:36,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-15 12:36:36,340 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:36:36,340 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:36:36,341 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:36:36,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:36:36,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1470704041, now seen corresponding path program 1 times [2023-02-15 12:36:36,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:36:36,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899974924] [2023-02-15 12:36:36,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:36:36,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:36:36,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:36,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:36:36,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:36,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 12:36:36,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:36:36,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899974924] [2023-02-15 12:36:36,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899974924] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 12:36:36,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 12:36:36,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 12:36:36,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559457773] [2023-02-15 12:36:36,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 12:36:36,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 12:36:36,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:36:36,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 12:36:36,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 12:36:36,675 INFO L87 Difference]: Start difference. First operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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) [2023-02-15 12:36:36,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:36:36,773 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2023-02-15 12:36:36,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 12:36:36,789 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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 12 [2023-02-15 12:36:36,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:36:36,807 INFO L225 Difference]: With dead ends: 51 [2023-02-15 12:36:36,807 INFO L226 Difference]: Without dead ends: 25 [2023-02-15 12:36:36,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 12:36:36,812 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 15 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 12:36:36,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 72 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 12:36:36,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-02-15 12:36:36,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-02-15 12:36:36,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2023-02-15 12:36:36,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2023-02-15 12:36:36,889 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 12 [2023-02-15 12:36:36,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:36:36,889 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2023-02-15 12:36:36,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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) [2023-02-15 12:36:36,890 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2023-02-15 12:36:36,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-15 12:36:36,894 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:36:36,894 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:36:36,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 12:36:36,895 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:36:36,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:36:36,896 INFO L85 PathProgramCache]: Analyzing trace with hash 941922339, now seen corresponding path program 1 times [2023-02-15 12:36:36,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:36:36,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318055975] [2023-02-15 12:36:36,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:36:36,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:36:36,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:37,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:36:37,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:37,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:37,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:37,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 12:36:37,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:36:37,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318055975] [2023-02-15 12:36:37,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318055975] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:36:37,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514732263] [2023-02-15 12:36:37,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:36:37,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:36:37,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:36:37,215 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) [2023-02-15 12:36:37,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 12:36:37,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:37,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 12:36:37,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:36:37,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 12:36:37,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:36:37,433 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 12:36:37,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514732263] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:36:37,434 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:36:37,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-02-15 12:36:37,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318274305] [2023-02-15 12:36:37,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:36:37,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 12:36:37,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:36:37,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 12:36:37,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-02-15 12:36:37,438 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-15 12:36:37,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:36:37,588 INFO L93 Difference]: Finished difference Result 74 states and 126 transitions. [2023-02-15 12:36:37,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 12:36:37,589 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 19 [2023-02-15 12:36:37,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:36:37,598 INFO L225 Difference]: With dead ends: 74 [2023-02-15 12:36:37,598 INFO L226 Difference]: Without dead ends: 50 [2023-02-15 12:36:37,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-02-15 12:36:37,609 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 21 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 12:36:37,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 91 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 12:36:37,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-02-15 12:36:37,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-02-15 12:36:37,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 34 states have internal predecessors, (39), 10 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (27), 12 states have call predecessors, (27), 10 states have call successors, (27) [2023-02-15 12:36:37,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 76 transitions. [2023-02-15 12:36:37,627 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 76 transitions. Word has length 19 [2023-02-15 12:36:37,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:36:37,627 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 76 transitions. [2023-02-15 12:36:37,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-15 12:36:37,628 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 76 transitions. [2023-02-15 12:36:37,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-15 12:36:37,632 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:36:37,633 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:36:37,639 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-15 12:36:37,837 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 [2023-02-15 12:36:37,837 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:36:37,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:36:37,838 INFO L85 PathProgramCache]: Analyzing trace with hash -574784801, now seen corresponding path program 1 times [2023-02-15 12:36:37,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:36:37,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147506383] [2023-02-15 12:36:37,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:36:37,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:36:37,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:38,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:36:38,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:38,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:38,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:38,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:38,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:38,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:38,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:38,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 12:36:38,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:38,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-15 12:36:38,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:38,246 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-15 12:36:38,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:36:38,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147506383] [2023-02-15 12:36:38,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147506383] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:36:38,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113886112] [2023-02-15 12:36:38,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:36:38,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:36:38,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:36:38,251 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) [2023-02-15 12:36:38,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 12:36:38,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:38,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-15 12:36:38,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:36:38,413 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-02-15 12:36:38,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:36:38,893 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-15 12:36:38,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113886112] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:36:38,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:36:38,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 11 [2023-02-15 12:36:38,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885762860] [2023-02-15 12:36:38,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:36:38,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 12:36:38,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:36:38,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 12:36:38,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-02-15 12:36:38,899 INFO L87 Difference]: Start difference. First operand 50 states and 76 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 5 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 5 states have call successors, (8) [2023-02-15 12:36:39,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:36:39,000 INFO L93 Difference]: Finished difference Result 120 states and 227 transitions. [2023-02-15 12:36:39,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 12:36:39,002 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 5 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 5 states have call successors, (8) Word has length 45 [2023-02-15 12:36:39,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:36:39,004 INFO L225 Difference]: With dead ends: 120 [2023-02-15 12:36:39,004 INFO L226 Difference]: Without dead ends: 53 [2023-02-15 12:36:39,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 96 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2023-02-15 12:36:39,006 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 47 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 12:36:39,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 81 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 12:36:39,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-02-15 12:36:39,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2023-02-15 12:36:39,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 37 states have internal predecessors, (40), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (28), 11 states have call predecessors, (28), 8 states have call successors, (28) [2023-02-15 12:36:39,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 76 transitions. [2023-02-15 12:36:39,017 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 76 transitions. Word has length 45 [2023-02-15 12:36:39,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:36:39,018 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 76 transitions. [2023-02-15 12:36:39,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 5 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 5 states have call successors, (8) [2023-02-15 12:36:39,018 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 76 transitions. [2023-02-15 12:36:39,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-02-15 12:36:39,024 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:36:39,024 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 11, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:36:39,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 12:36:39,231 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 [2023-02-15 12:36:39,232 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:36:39,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:36:39,232 INFO L85 PathProgramCache]: Analyzing trace with hash 2049356910, now seen corresponding path program 2 times [2023-02-15 12:36:39,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:36:39,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385732939] [2023-02-15 12:36:39,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:36:39,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:36:39,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:39,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:36:39,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:39,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:39,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:39,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:39,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:39,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:39,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:39,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:39,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:39,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:39,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:39,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 12:36:39,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:39,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 12:36:39,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:39,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:39,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:39,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:39,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:40,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:40,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:40,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 12:36:40,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:40,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2023-02-15 12:36:40,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:40,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:40,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:40,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:40,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:40,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:40,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:40,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 12:36:40,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:40,057 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 127 proven. 266 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-02-15 12:36:40,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:36:40,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385732939] [2023-02-15 12:36:40,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385732939] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:36:40,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375832983] [2023-02-15 12:36:40,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 12:36:40,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:36:40,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:36:40,078 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) [2023-02-15 12:36:40,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 12:36:40,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 12:36:40,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:36:40,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-15 12:36:40,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:36:40,313 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 360 proven. 86 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2023-02-15 12:36:40,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:36:41,397 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 115 proven. 179 refuted. 0 times theorem prover too weak. 375 trivial. 0 not checked. [2023-02-15 12:36:41,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375832983] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:36:41,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:36:41,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 15] total 32 [2023-02-15 12:36:41,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679812061] [2023-02-15 12:36:41,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:36:41,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-15 12:36:41,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:36:41,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-15 12:36:41,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2023-02-15 12:36:41,406 INFO L87 Difference]: Start difference. First operand 53 states and 76 transitions. Second operand has 32 states, 32 states have (on average 2.34375) internal successors, (75), 26 states have internal predecessors, (75), 11 states have call successors, (18), 2 states have call predecessors, (18), 15 states have return successors, (32), 18 states have call predecessors, (32), 11 states have call successors, (32) [2023-02-15 12:36:42,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:36:42,217 INFO L93 Difference]: Finished difference Result 126 states and 253 transitions. [2023-02-15 12:36:42,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-02-15 12:36:42,218 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 26 states have internal predecessors, (75), 11 states have call successors, (18), 2 states have call predecessors, (18), 15 states have return successors, (32), 18 states have call predecessors, (32), 11 states have call successors, (32) Word has length 119 [2023-02-15 12:36:42,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:36:42,220 INFO L225 Difference]: With dead ends: 126 [2023-02-15 12:36:42,221 INFO L226 Difference]: Without dead ends: 78 [2023-02-15 12:36:42,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 252 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=585, Invalid=2721, Unknown=0, NotChecked=0, Total=3306 [2023-02-15 12:36:42,223 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 126 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 12:36:42,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 177 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 12:36:42,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-02-15 12:36:42,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2023-02-15 12:36:42,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 53 states have internal predecessors, (58), 13 states have call successors, (13), 7 states have call predecessors, (13), 11 states have return successors, (46), 16 states have call predecessors, (46), 13 states have call successors, (46) [2023-02-15 12:36:42,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 117 transitions. [2023-02-15 12:36:42,236 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 117 transitions. Word has length 119 [2023-02-15 12:36:42,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:36:42,236 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 117 transitions. [2023-02-15 12:36:42,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 26 states have internal predecessors, (75), 11 states have call successors, (18), 2 states have call predecessors, (18), 15 states have return successors, (32), 18 states have call predecessors, (32), 11 states have call successors, (32) [2023-02-15 12:36:42,237 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 117 transitions. [2023-02-15 12:36:42,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-02-15 12:36:42,240 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:36:42,241 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 11, 8, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:36:42,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 12:36:42,447 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 [2023-02-15 12:36:42,447 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:36:42,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:36:42,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1538229242, now seen corresponding path program 3 times [2023-02-15 12:36:42,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:36:42,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591722543] [2023-02-15 12:36:42,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:36:42,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:36:42,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:42,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:36:42,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:42,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:42,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:42,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:42,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:42,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:42,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:42,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:42,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:42,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:42,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:42,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 12:36:42,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:42,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 12:36:42,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:42,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:42,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:42,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:42,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:42,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 12:36:42,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:42,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-02-15 12:36:42,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:42,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:42,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:42,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:42,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:42,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:42,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:42,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:42,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:42,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 12:36:42,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:42,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-15 12:36:42,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:42,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-15 12:36:42,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:42,941 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 125 proven. 275 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2023-02-15 12:36:42,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:36:42,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591722543] [2023-02-15 12:36:42,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591722543] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:36:42,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437086715] [2023-02-15 12:36:42,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 12:36:42,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:36:42,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:36:42,957 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) [2023-02-15 12:36:42,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 12:36:43,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2023-02-15 12:36:43,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:36:43,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-15 12:36:43,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:36:43,122 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 484 proven. 71 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2023-02-15 12:36:43,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:36:44,320 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 131 proven. 269 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2023-02-15 12:36:44,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437086715] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:36:44,320 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:36:44,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 16] total 27 [2023-02-15 12:36:44,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528901651] [2023-02-15 12:36:44,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:36:44,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-15 12:36:44,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:36:44,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-15 12:36:44,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2023-02-15 12:36:44,328 INFO L87 Difference]: Start difference. First operand 77 states and 117 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 22 states have internal predecessors, (70), 11 states have call successors, (17), 2 states have call predecessors, (17), 12 states have return successors, (27), 13 states have call predecessors, (27), 11 states have call successors, (27) [2023-02-15 12:36:44,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:36:44,622 INFO L93 Difference]: Finished difference Result 153 states and 265 transitions. [2023-02-15 12:36:44,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-15 12:36:44,625 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 22 states have internal predecessors, (70), 11 states have call successors, (17), 2 states have call predecessors, (17), 12 states have return successors, (27), 13 states have call predecessors, (27), 11 states have call successors, (27) Word has length 131 [2023-02-15 12:36:44,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:36:44,628 INFO L225 Difference]: With dead ends: 153 [2023-02-15 12:36:44,628 INFO L226 Difference]: Without dead ends: 85 [2023-02-15 12:36:44,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 282 SyntacticMatches, 7 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=417, Invalid=1563, Unknown=0, NotChecked=0, Total=1980 [2023-02-15 12:36:44,630 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 50 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 12:36:44,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 163 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 12:36:44,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-02-15 12:36:44,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2023-02-15 12:36:44,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 59 states have internal predecessors, (66), 15 states have call successors, (15), 9 states have call predecessors, (15), 11 states have return successors, (46), 16 states have call predecessors, (46), 15 states have call successors, (46) [2023-02-15 12:36:44,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 127 transitions. [2023-02-15 12:36:44,641 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 127 transitions. Word has length 131 [2023-02-15 12:36:44,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:36:44,641 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 127 transitions. [2023-02-15 12:36:44,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 22 states have internal predecessors, (70), 11 states have call successors, (17), 2 states have call predecessors, (17), 12 states have return successors, (27), 13 states have call predecessors, (27), 11 states have call successors, (27) [2023-02-15 12:36:44,642 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 127 transitions. [2023-02-15 12:36:44,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-02-15 12:36:44,643 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:36:44,643 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 11, 8, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:36:44,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 12:36:44,849 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 [2023-02-15 12:36:44,850 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:36:44,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:36:44,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1811622132, now seen corresponding path program 4 times [2023-02-15 12:36:44,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:36:44,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150275952] [2023-02-15 12:36:44,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:36:44,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:36:44,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:44,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:36:45,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:45,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:45,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:45,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:45,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:45,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:45,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:45,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:45,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:45,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:45,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:45,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 12:36:45,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:45,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 12:36:45,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:45,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:45,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:45,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:45,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:45,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:45,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:45,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 12:36:45,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:45,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-15 12:36:45,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:45,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2023-02-15 12:36:45,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:45,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:45,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:45,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:45,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:45,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:45,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:45,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 12:36:45,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:45,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-15 12:36:45,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:45,401 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 152 proven. 295 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2023-02-15 12:36:45,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:36:45,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150275952] [2023-02-15 12:36:45,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150275952] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:36:45,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98486428] [2023-02-15 12:36:45,402 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 12:36:45,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:36:45,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:36:45,417 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) [2023-02-15 12:36:45,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 12:36:45,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 12:36:45,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:36:45,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-15 12:36:45,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:36:45,649 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 475 proven. 114 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2023-02-15 12:36:45,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:36:46,961 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 155 proven. 295 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2023-02-15 12:36:46,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98486428] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:36:46,961 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:36:46,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 17] total 24 [2023-02-15 12:36:46,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128545825] [2023-02-15 12:36:46,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:36:46,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-15 12:36:46,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:36:46,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-15 12:36:46,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2023-02-15 12:36:46,963 INFO L87 Difference]: Start difference. First operand 85 states and 127 transitions. Second operand has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 21 states have internal predecessors, (71), 12 states have call successors, (18), 2 states have call predecessors, (18), 12 states have return successors, (28), 11 states have call predecessors, (28), 12 states have call successors, (28) [2023-02-15 12:36:47,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:36:47,327 INFO L93 Difference]: Finished difference Result 176 states and 301 transitions. [2023-02-15 12:36:47,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-15 12:36:47,328 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 21 states have internal predecessors, (71), 12 states have call successors, (18), 2 states have call predecessors, (18), 12 states have return successors, (28), 11 states have call predecessors, (28), 12 states have call successors, (28) Word has length 131 [2023-02-15 12:36:47,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:36:47,329 INFO L225 Difference]: With dead ends: 176 [2023-02-15 12:36:47,329 INFO L226 Difference]: Without dead ends: 100 [2023-02-15 12:36:47,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 280 SyntacticMatches, 13 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=461, Invalid=1519, Unknown=0, NotChecked=0, Total=1980 [2023-02-15 12:36:47,331 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 40 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 12:36:47,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 218 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 12:36:47,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-02-15 12:36:47,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2023-02-15 12:36:47,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 67 states have (on average 1.1194029850746268) internal successors, (75), 68 states have internal predecessors, (75), 18 states have call successors, (18), 9 states have call predecessors, (18), 14 states have return successors, (59), 22 states have call predecessors, (59), 18 states have call successors, (59) [2023-02-15 12:36:47,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 152 transitions. [2023-02-15 12:36:47,341 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 152 transitions. Word has length 131 [2023-02-15 12:36:47,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:36:47,341 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 152 transitions. [2023-02-15 12:36:47,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 21 states have internal predecessors, (71), 12 states have call successors, (18), 2 states have call predecessors, (18), 12 states have return successors, (28), 11 states have call predecessors, (28), 12 states have call successors, (28) [2023-02-15 12:36:47,342 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 152 transitions. [2023-02-15 12:36:47,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-02-15 12:36:47,343 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:36:47,343 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 13, 10, 9, 9, 9, 9, 9, 9, 9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:36:47,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 12:36:47,549 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 [2023-02-15 12:36:47,549 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:36:47,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:36:47,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1701842998, now seen corresponding path program 5 times [2023-02-15 12:36:47,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:36:47,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573130831] [2023-02-15 12:36:47,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:36:47,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:36:47,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:47,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:36:47,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:48,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:48,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:48,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:48,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:48,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:48,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:48,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:48,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:48,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:48,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:48,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 12:36:48,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:48,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 12:36:48,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:48,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:48,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:48,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:48,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:48,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:48,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:48,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:48,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:48,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 12:36:48,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:48,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-15 12:36:48,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:48,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-15 12:36:48,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:48,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-02-15 12:36:48,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:48,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:48,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:48,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:48,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:48,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:48,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:48,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:48,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:48,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 12:36:48,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:48,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-15 12:36:48,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:48,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-15 12:36:48,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:48,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 445 proven. 284 refuted. 0 times theorem prover too weak. 517 trivial. 0 not checked. [2023-02-15 12:36:48,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:36:48,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573130831] [2023-02-15 12:36:48,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573130831] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:36:48,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614359721] [2023-02-15 12:36:48,478 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 12:36:48,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:36:48,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:36:48,493 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) [2023-02-15 12:36:48,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 12:36:48,618 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2023-02-15 12:36:48,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:36:48,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-15 12:36:48,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:36:48,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 421 proven. 286 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2023-02-15 12:36:48,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:36:51,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 467 proven. 286 refuted. 0 times theorem prover too weak. 493 trivial. 0 not checked. [2023-02-15 12:36:51,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614359721] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:36:51,753 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:36:51,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20, 27] total 38 [2023-02-15 12:36:51,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421221483] [2023-02-15 12:36:51,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:36:51,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-02-15 12:36:51,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:36:51,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-02-15 12:36:51,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1220, Unknown=0, NotChecked=0, Total=1406 [2023-02-15 12:36:51,755 INFO L87 Difference]: Start difference. First operand 100 states and 152 transitions. Second operand has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 32 states have internal predecessors, (84), 16 states have call successors, (19), 1 states have call predecessors, (19), 18 states have return successors, (36), 18 states have call predecessors, (36), 16 states have call successors, (36) [2023-02-15 12:36:52,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:36:52,533 INFO L93 Difference]: Finished difference Result 206 states and 359 transitions. [2023-02-15 12:36:52,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-15 12:36:52,534 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 32 states have internal predecessors, (84), 16 states have call successors, (19), 1 states have call predecessors, (19), 18 states have return successors, (36), 18 states have call predecessors, (36), 16 states have call successors, (36) Word has length 157 [2023-02-15 12:36:52,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:36:52,537 INFO L225 Difference]: With dead ends: 206 [2023-02-15 12:36:52,537 INFO L226 Difference]: Without dead ends: 115 [2023-02-15 12:36:52,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 330 SyntacticMatches, 17 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1049 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=799, Invalid=3361, Unknown=0, NotChecked=0, Total=4160 [2023-02-15 12:36:52,541 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 54 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 12:36:52,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 248 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 12:36:52,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-02-15 12:36:52,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2023-02-15 12:36:52,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 76 states have (on average 1.105263157894737) internal successors, (84), 77 states have internal predecessors, (84), 21 states have call successors, (21), 9 states have call predecessors, (21), 17 states have return successors, (80), 28 states have call predecessors, (80), 21 states have call successors, (80) [2023-02-15 12:36:52,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 185 transitions. [2023-02-15 12:36:52,576 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 185 transitions. Word has length 157 [2023-02-15 12:36:52,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:36:52,579 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 185 transitions. [2023-02-15 12:36:52,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 32 states have internal predecessors, (84), 16 states have call successors, (19), 1 states have call predecessors, (19), 18 states have return successors, (36), 18 states have call predecessors, (36), 16 states have call successors, (36) [2023-02-15 12:36:52,579 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 185 transitions. [2023-02-15 12:36:52,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2023-02-15 12:36:52,582 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:36:52,582 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 15, 12, 11, 11, 11, 11, 11, 11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:36:52,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 12:36:52,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:36:52,790 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:36:52,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:36:52,791 INFO L85 PathProgramCache]: Analyzing trace with hash 332854534, now seen corresponding path program 6 times [2023-02-15 12:36:52,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:36:52,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331340340] [2023-02-15 12:36:52,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:36:52,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:36:52,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:53,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:36:53,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:53,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:53,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:53,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:53,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:53,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:53,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:53,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:53,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:53,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:53,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:53,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 12:36:53,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:53,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 12:36:53,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:53,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:53,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:53,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:53,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:53,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:53,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:53,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:53,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:53,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 12:36:53,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:53,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-15 12:36:53,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:53,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-15 12:36:53,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:53,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-02-15 12:36:53,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:53,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:53,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:53,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:53,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:53,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:53,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:53,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:53,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:53,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:53,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:53,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:53,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:53,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 12:36:53,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:53,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-15 12:36:53,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:53,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-15 12:36:53,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:53,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-02-15 12:36:53,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:53,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-02-15 12:36:53,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:53,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 686 proven. 70 refuted. 0 times theorem prover too weak. 985 trivial. 0 not checked. [2023-02-15 12:36:53,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:36:53,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331340340] [2023-02-15 12:36:53,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331340340] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:36:53,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662560109] [2023-02-15 12:36:53,738 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 12:36:53,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:36:53,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:36:53,741 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) [2023-02-15 12:36:53,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 12:36:53,944 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2023-02-15 12:36:53,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 12:36:53,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-15 12:36:53,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:36:54,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 657 proven. 84 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2023-02-15 12:36:54,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:36:57,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 711 proven. 75 refuted. 0 times theorem prover too weak. 955 trivial. 0 not checked. [2023-02-15 12:36:57,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662560109] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:36:57,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:36:57,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 33] total 38 [2023-02-15 12:36:57,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848658143] [2023-02-15 12:36:57,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:36:57,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-02-15 12:36:57,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:36:57,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-02-15 12:36:57,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1248, Unknown=0, NotChecked=0, Total=1406 [2023-02-15 12:36:57,972 INFO L87 Difference]: Start difference. First operand 115 states and 185 transitions. Second operand has 38 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 31 states have internal predecessors, (59), 6 states have call successors, (9), 1 states have call predecessors, (9), 15 states have return successors, (23), 13 states have call predecessors, (23), 6 states have call successors, (23) [2023-02-15 12:36:58,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:36:58,764 INFO L93 Difference]: Finished difference Result 155 states and 272 transitions. [2023-02-15 12:36:58,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-15 12:36:58,764 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 31 states have internal predecessors, (59), 6 states have call successors, (9), 1 states have call predecessors, (9), 15 states have return successors, (23), 13 states have call predecessors, (23), 6 states have call successors, (23) Word has length 183 [2023-02-15 12:36:58,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:36:58,766 INFO L225 Difference]: With dead ends: 155 [2023-02-15 12:36:58,766 INFO L226 Difference]: Without dead ends: 151 [2023-02-15 12:36:58,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 391 SyntacticMatches, 20 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=710, Invalid=3450, Unknown=0, NotChecked=0, Total=4160 [2023-02-15 12:36:58,768 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 81 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 902 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 1045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 12:36:58,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 277 Invalid, 1045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 902 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 12:36:58,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2023-02-15 12:36:58,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 138. [2023-02-15 12:36:58,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 91 states have (on average 1.0879120879120878) internal successors, (99), 92 states have internal predecessors, (99), 22 states have call successors, (22), 9 states have call predecessors, (22), 24 states have return successors, (121), 36 states have call predecessors, (121), 22 states have call successors, (121) [2023-02-15 12:36:58,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 242 transitions. [2023-02-15 12:36:58,777 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 242 transitions. Word has length 183 [2023-02-15 12:36:58,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:36:58,778 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 242 transitions. [2023-02-15 12:36:58,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 31 states have internal predecessors, (59), 6 states have call successors, (9), 1 states have call predecessors, (9), 15 states have return successors, (23), 13 states have call predecessors, (23), 6 states have call successors, (23) [2023-02-15 12:36:58,778 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 242 transitions. [2023-02-15 12:36:58,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-02-15 12:36:58,779 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 12:36:58,780 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 14, 11, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 12:36:58,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-15 12:36:58,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:36:58,986 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 12:36:58,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 12:36:58,987 INFO L85 PathProgramCache]: Analyzing trace with hash -860565711, now seen corresponding path program 7 times [2023-02-15 12:36:58,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 12:36:58,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071577614] [2023-02-15 12:36:58,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 12:36:58,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 12:36:59,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:59,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 12:36:59,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:59,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:59,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:59,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:59,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:59,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:59,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:59,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:59,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:59,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:59,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:59,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 12:36:59,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:59,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 12:36:59,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:59,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:59,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:59,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:59,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:59,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:59,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:59,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:59,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:59,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 12:36:59,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:59,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-15 12:36:59,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:59,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-15 12:36:59,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:59,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-02-15 12:36:59,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:59,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:59,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:59,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:59,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:59,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:59,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:59,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:59,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:59,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 12:36:59,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:59,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 12:36:59,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:59,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-15 12:36:59,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:59,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-15 12:36:59,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:59,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-02-15 12:36:59,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:59,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 502 proven. 372 refuted. 0 times theorem prover too weak. 609 trivial. 0 not checked. [2023-02-15 12:36:59,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 12:36:59,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071577614] [2023-02-15 12:36:59,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071577614] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 12:36:59,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035438968] [2023-02-15 12:36:59,699 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 12:36:59,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 12:36:59,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 12:36:59,701 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) [2023-02-15 12:36:59,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 12:36:59,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 12:36:59,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 37 conjunts are in the unsatisfiable core [2023-02-15 12:36:59,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 12:37:00,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 477 proven. 372 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2023-02-15 12:37:00,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 12:37:02,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 525 proven. 384 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2023-02-15 12:37:02,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035438968] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 12:37:02,951 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 12:37:02,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 28] total 35 [2023-02-15 12:37:02,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238501519] [2023-02-15 12:37:02,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 12:37:02,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-15 12:37:02,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 12:37:02,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-15 12:37:02,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2023-02-15 12:37:02,953 INFO L87 Difference]: Start difference. First operand 138 states and 242 transitions. Second operand has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 31 states have internal predecessors, (85), 17 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (37), 16 states have call predecessors, (37), 17 states have call successors, (37) [2023-02-15 12:37:03,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 12:37:03,504 INFO L93 Difference]: Finished difference Result 255 states and 507 transitions. [2023-02-15 12:37:03,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-02-15 12:37:03,505 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 31 states have internal predecessors, (85), 17 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (37), 16 states have call predecessors, (37), 17 states have call successors, (37) Word has length 170 [2023-02-15 12:37:03,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 12:37:03,506 INFO L225 Difference]: With dead ends: 255 [2023-02-15 12:37:03,506 INFO L226 Difference]: Without dead ends: 0 [2023-02-15 12:37:03,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 358 SyntacticMatches, 23 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1170 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=865, Invalid=3295, Unknown=0, NotChecked=0, Total=4160 [2023-02-15 12:37:03,511 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 90 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 12:37:03,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 192 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 12:37:03,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-02-15 12:37:03,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-02-15 12:37:03,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2023-02-15 12:37:03,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-02-15 12:37:03,513 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 170 [2023-02-15 12:37:03,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 12:37:03,513 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-02-15 12:37:03,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 31 states have internal predecessors, (85), 17 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (37), 16 states have call predecessors, (37), 17 states have call successors, (37) [2023-02-15 12:37:03,513 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-02-15 12:37:03,513 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-02-15 12:37:03,517 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-02-15 12:37:03,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 12:37:03,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-02-15 12:37:03,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-02-15 12:37:04,307 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-02-15 12:37:04,308 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2023-02-15 12:37:04,308 INFO L899 garLoopResultBuilder]: For program point L29(lines 29 33) no Hoare annotation was computed. [2023-02-15 12:37:04,308 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2023-02-15 12:37:04,308 INFO L902 garLoopResultBuilder]: At program point L27(lines 27 47) the Hoare annotation is: true [2023-02-15 12:37:04,308 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 45) no Hoare annotation was computed. [2023-02-15 12:37:04,309 INFO L899 garLoopResultBuilder]: For program point L45(line 45) no Hoare annotation was computed. [2023-02-15 12:37:04,309 INFO L899 garLoopResultBuilder]: For program point L42(lines 42 46) no Hoare annotation was computed. [2023-02-15 12:37:04,309 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-02-15 12:37:04,309 INFO L902 garLoopResultBuilder]: At program point L41(line 41) the Hoare annotation is: true [2023-02-15 12:37:04,309 INFO L899 garLoopResultBuilder]: For program point L41-1(line 41) no Hoare annotation was computed. [2023-02-15 12:37:04,309 INFO L899 garLoopResultBuilder]: For program point L35(lines 35 40) no Hoare annotation was computed. [2023-02-15 12:37:04,309 INFO L899 garLoopResultBuilder]: For program point ackermannEXIT(lines 16 24) no Hoare annotation was computed. [2023-02-15 12:37:04,310 INFO L895 garLoopResultBuilder]: At program point L23(line 23) the Hoare annotation is: (and (or (not (= |ackermann_#in~m| 0)) (not (< |ackermann_#in~n| 2))) (= ackermann_~n |ackermann_#in~n|) (= ackermann_~m |ackermann_#in~m|)) [2023-02-15 12:37:04,310 INFO L899 garLoopResultBuilder]: For program point L23-1(line 23) no Hoare annotation was computed. [2023-02-15 12:37:04,311 INFO L895 garLoopResultBuilder]: At program point L21(line 21) the Hoare annotation is: (and (= |ackermann_#in~n| 0) (= ackermann_~n |ackermann_#in~n|) (= ackermann_~m |ackermann_#in~m|)) [2023-02-15 12:37:04,312 INFO L895 garLoopResultBuilder]: At program point L23-2(line 23) the Hoare annotation is: (let ((.cse1 (= ackermann_~n |ackermann_#in~n|)) (.cse2 (= ackermann_~m |ackermann_#in~m|)) (.cse0 (= |ackermann_#in~m| 0))) (and (or (not (<= |ackermann_#in~m| 0)) (and .cse0 .cse1 .cse2)) (let ((.cse4 (<= |ackermann_#in~n| 2)) (.cse3 (<= 5 |ackermann_#t~ret5|)) (.cse6 (<= |ackermann_#in~m| 1)) (.cse5 (<= 3 |ackermann_#t~ret5|)) (.cse7 (<= |ackermann_#in~n| 1))) (or (and .cse3 .cse4 .cse1 (<= ackermann_~m 2) .cse2) (and .cse4 .cse5 .cse1 .cse2 .cse6) (and .cse1 (<= 2 |ackermann_#t~ret5|) .cse2 .cse6 .cse7) (and (<= |ackermann_#in~n| 3) .cse1 .cse2 .cse6 (<= 4 |ackermann_#t~ret5|)) (not (<= 1 |ackermann_#in~m|)) (and .cse3 .cse1 .cse2 (<= |ackermann_#in~n| 4) .cse6) (and .cse5 .cse1 .cse2 .cse7) (and (<= 6 |ackermann_#t~ret5|) .cse1 .cse2))) (or .cse0 (not (<= |ackermann_#in~n| 0))))) [2023-02-15 12:37:04,312 INFO L899 garLoopResultBuilder]: For program point L20(lines 20 22) no Hoare annotation was computed. [2023-02-15 12:37:04,312 INFO L899 garLoopResultBuilder]: For program point L21-1(line 21) no Hoare annotation was computed. [2023-02-15 12:37:04,312 INFO L899 garLoopResultBuilder]: For program point L23-3(line 23) no Hoare annotation was computed. [2023-02-15 12:37:04,313 INFO L899 garLoopResultBuilder]: For program point L17(lines 17 19) no Hoare annotation was computed. [2023-02-15 12:37:04,313 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 16 24) the Hoare annotation is: true [2023-02-15 12:37:04,313 INFO L899 garLoopResultBuilder]: For program point ackermannFINAL(lines 16 24) no Hoare annotation was computed. [2023-02-15 12:37:04,315 INFO L445 BasicCegarLoop]: Path program histogram: [7, 1, 1] [2023-02-15 12:37:04,317 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-02-15 12:37:04,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.02 12:37:04 BoogieIcfgContainer [2023-02-15 12:37:04,329 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-02-15 12:37:04,329 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-15 12:37:04,329 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-15 12:37:04,330 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-15 12:37:04,330 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 12:36:36" (3/4) ... [2023-02-15 12:37:04,332 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-02-15 12:37:04,337 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure ackermann [2023-02-15 12:37:04,340 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2023-02-15 12:37:04,341 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2023-02-15 12:37:04,341 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-02-15 12:37:04,341 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-02-15 12:37:04,371 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-02-15 12:37:04,371 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-15 12:37:04,371 INFO L158 Benchmark]: Toolchain (without parser) took 28668.19ms. Allocated memory was 138.4MB in the beginning and 423.6MB in the end (delta: 285.2MB). Free memory was 99.4MB in the beginning and 269.4MB in the end (delta: -170.0MB). Peak memory consumption was 118.4MB. Max. memory is 16.1GB. [2023-02-15 12:37:04,372 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 138.4MB. Free memory is still 104.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 12:37:04,372 INFO L158 Benchmark]: CACSL2BoogieTranslator took 228.33ms. Allocated memory is still 138.4MB. Free memory was 99.0MB in the beginning and 89.2MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-02-15 12:37:04,373 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.15ms. Allocated memory is still 138.4MB. Free memory was 89.2MB in the beginning and 87.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-15 12:37:04,373 INFO L158 Benchmark]: Boogie Preprocessor took 33.92ms. Allocated memory is still 138.4MB. Free memory was 87.6MB in the beginning and 86.8MB in the end (delta: 762.0kB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 12:37:04,373 INFO L158 Benchmark]: RCFGBuilder took 260.14ms. Allocated memory is still 138.4MB. Free memory was 86.8MB in the beginning and 76.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-15 12:37:04,373 INFO L158 Benchmark]: TraceAbstraction took 28063.86ms. Allocated memory was 138.4MB in the beginning and 423.6MB in the end (delta: 285.2MB). Free memory was 75.4MB in the beginning and 271.5MB in the end (delta: -196.0MB). Peak memory consumption was 91.1MB. Max. memory is 16.1GB. [2023-02-15 12:37:04,374 INFO L158 Benchmark]: Witness Printer took 41.68ms. Allocated memory is still 423.6MB. Free memory was 271.5MB in the beginning and 269.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-15 12:37:04,378 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 138.4MB. Free memory is still 104.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 228.33ms. Allocated memory is still 138.4MB. Free memory was 99.0MB in the beginning and 89.2MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.15ms. Allocated memory is still 138.4MB. Free memory was 89.2MB in the beginning and 87.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 33.92ms. Allocated memory is still 138.4MB. Free memory was 87.6MB in the beginning and 86.8MB in the end (delta: 762.0kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 260.14ms. Allocated memory is still 138.4MB. Free memory was 86.8MB in the beginning and 76.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 28063.86ms. Allocated memory was 138.4MB in the beginning and 423.6MB in the end (delta: 285.2MB). Free memory was 75.4MB in the beginning and 271.5MB in the end (delta: -196.0MB). Peak memory consumption was 91.1MB. Max. memory is 16.1GB. * Witness Printer took 41.68ms. Allocated memory is still 423.6MB. Free memory was 271.5MB in the beginning and 269.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 45]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 28.0s, OverallIterations: 9, TraceHistogramMax: 27, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 4.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 563 SdHoareTripleChecker+Valid, 1.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 524 mSDsluCounter, 1519 SdHoareTripleChecker+Invalid, 1.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1300 mSDsCounter, 883 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3558 IncrementalHoareTripleChecker+Invalid, 4441 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 883 mSolverCounterUnsat, 219 mSDtfsCounter, 3558 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2476 GetRequests, 2032 SyntacticMatches, 86 SemanticMatches, 358 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4572 ImplicationChecksByTransitivity, 3.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=138occurred in iteration=8, InterpolantAutomatonStates: 206, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 9 MinimizatonAttempts, 14 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 462 PreInvPairs, 942 NumberOfFragments, 161 HoareAnnotationTreeSize, 462 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 6 FomulaSimplificationsInter, 5108 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 19.9s InterpolantComputationTime, 1922 NumberOfCodeBlocks, 1901 NumberOfCodeBlocksAsserted, 60 NumberOfCheckSat, 2852 ConstructedInterpolants, 0 QuantifiedInterpolants, 5595 SizeOfPredicates, 63 NumberOfNonLiveVariables, 2894 ConjunctsInSsa, 183 ConjunctsInUnsatCore, 25 InterpolantComputations, 1 PerfectInterpolantSequences, 16496/20640 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2023-02-15 12:37:04,412 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE