./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/fibo_2calls_6-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive-simple/fibo_2calls_6-2.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 31de98bafea1eb3233157f378400eba30060b6561e9e0a6257ecfebe8e53877a --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 06:26:27,895 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 06:26:27,902 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 06:26:27,966 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 06:26:27,967 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 06:26:27,968 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 06:26:27,970 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 06:26:27,972 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 06:26:27,974 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 06:26:27,977 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 06:26:27,978 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 06:26:27,980 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 06:26:27,981 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 06:26:27,982 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 06:26:27,983 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 06:26:27,986 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 06:26:27,987 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 06:26:27,989 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 06:26:27,990 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 06:26:27,995 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 06:26:27,997 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 06:26:27,998 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 06:26:27,999 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 06:26:28,000 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 06:26:28,002 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 06:26:28,008 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 06:26:28,008 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 06:26:28,009 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 06:26:28,010 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 06:26:28,010 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 06:26:28,011 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 06:26:28,012 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 06:26:28,014 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 06:26:28,014 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 06:26:28,015 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 06:26:28,016 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 06:26:28,016 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 06:26:28,016 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 06:26:28,017 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 06:26:28,017 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 06:26:28,017 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 06:26:28,019 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 06:26:28,020 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 06:26:28,048 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 06:26:28,048 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 06:26:28,049 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 06:26:28,049 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 06:26:28,049 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 06:26:28,050 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 06:26:28,050 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 06:26:28,050 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 06:26:28,050 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 06:26:28,051 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 06:26:28,052 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 06:26:28,052 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 06:26:28,052 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 06:26:28,052 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 06:26:28,052 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 06:26:28,052 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 06:26:28,053 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 06:26:28,053 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 06:26:28,053 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 06:26:28,054 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 06:26:28,054 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 06:26:28,055 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 06:26:28,055 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 06:26:28,055 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 06:26:28,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 06:26:28,055 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 06:26:28,056 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 06:26:28,056 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 06:26:28,056 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 06:26:28,056 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 06:26:28,056 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 06:26:28,057 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 06:26:28,057 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 06:26:28,057 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 31de98bafea1eb3233157f378400eba30060b6561e9e0a6257ecfebe8e53877a [2022-07-12 06:26:28,298 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 06:26:28,326 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 06:26:28,328 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 06:26:28,329 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 06:26:28,330 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 06:26:28,331 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_2calls_6-2.c [2022-07-12 06:26:28,388 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bef3fea32/619f305d25034363bd6f0a9ba83cbf5a/FLAG271593ed8 [2022-07-12 06:26:28,825 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 06:26:28,826 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_6-2.c [2022-07-12 06:26:28,839 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bef3fea32/619f305d25034363bd6f0a9ba83cbf5a/FLAG271593ed8 [2022-07-12 06:26:28,855 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bef3fea32/619f305d25034363bd6f0a9ba83cbf5a [2022-07-12 06:26:28,857 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 06:26:28,858 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 06:26:28,865 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 06:26:28,865 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 06:26:28,868 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 06:26:28,869 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:26:28" (1/1) ... [2022-07-12 06:26:28,870 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47711c7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:26:28, skipping insertion in model container [2022-07-12 06:26:28,870 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:26:28" (1/1) ... [2022-07-12 06:26:28,876 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 06:26:28,890 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 06:26:29,057 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_6-2.c[946,959] [2022-07-12 06:26:29,060 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 06:26:29,067 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 06:26:29,085 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_6-2.c[946,959] [2022-07-12 06:26:29,086 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 06:26:29,099 INFO L208 MainTranslator]: Completed translation [2022-07-12 06:26:29,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:26:29 WrapperNode [2022-07-12 06:26:29,100 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 06:26:29,101 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 06:26:29,101 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 06:26:29,102 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 06:26:29,107 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:26:29" (1/1) ... [2022-07-12 06:26:29,113 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:26:29" (1/1) ... [2022-07-12 06:26:29,126 INFO L137 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 21 [2022-07-12 06:26:29,126 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 06:26:29,128 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 06:26:29,128 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 06:26:29,128 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 06:26:29,134 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:26:29" (1/1) ... [2022-07-12 06:26:29,134 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:26:29" (1/1) ... [2022-07-12 06:26:29,142 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:26:29" (1/1) ... [2022-07-12 06:26:29,143 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:26:29" (1/1) ... [2022-07-12 06:26:29,152 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:26:29" (1/1) ... [2022-07-12 06:26:29,153 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:26:29" (1/1) ... [2022-07-12 06:26:29,155 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:26:29" (1/1) ... [2022-07-12 06:26:29,158 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 06:26:29,160 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 06:26:29,161 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 06:26:29,161 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 06:26:29,162 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:26:29" (1/1) ... [2022-07-12 06:26:29,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 06:26:29,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:26:29,188 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) [2022-07-12 06:26:29,217 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 [2022-07-12 06:26:29,237 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 06:26:29,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 06:26:29,237 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2022-07-12 06:26:29,237 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2022-07-12 06:26:29,238 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2022-07-12 06:26:29,238 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2022-07-12 06:26:29,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 06:26:29,238 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 06:26:29,288 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 06:26:29,290 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 06:26:29,429 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 06:26:29,434 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 06:26:29,441 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-12 06:26:29,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:26:29 BoogieIcfgContainer [2022-07-12 06:26:29,457 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 06:26:29,458 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 06:26:29,458 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 06:26:29,461 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 06:26:29,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 06:26:28" (1/3) ... [2022-07-12 06:26:29,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@361ad02a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:26:29, skipping insertion in model container [2022-07-12 06:26:29,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:26:29" (2/3) ... [2022-07-12 06:26:29,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@361ad02a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:26:29, skipping insertion in model container [2022-07-12 06:26:29,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:26:29" (3/3) ... [2022-07-12 06:26:29,464 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_6-2.c [2022-07-12 06:26:29,490 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 06:26:29,490 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 06:26:29,540 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 06:26:29,548 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@20a78b14, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@37c86e4b [2022-07-12 06:26:29,548 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-12 06:26:29,552 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-12 06:26:29,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-12 06:26:29,568 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:26:29,569 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:26:29,569 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:26:29,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:26:29,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1123300790, now seen corresponding path program 1 times [2022-07-12 06:26:29,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:26:29,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465496295] [2022-07-12 06:26:29,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:26:29,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:26:29,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:29,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:26:29,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:29,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 06:26:29,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:26:29,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465496295] [2022-07-12 06:26:29,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465496295] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 06:26:29,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 06:26:29,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 06:26:29,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119870240] [2022-07-12 06:26:29,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 06:26:29,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 06:26:29,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:26:29,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 06:26:29,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 06:26:29,851 INFO L87 Difference]: Start difference. First operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 06:26:29,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:26:29,909 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2022-07-12 06:26:29,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 06:26:29,912 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-07-12 06:26:29,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:26:29,922 INFO L225 Difference]: With dead ends: 43 [2022-07-12 06:26:29,922 INFO L226 Difference]: Without dead ends: 27 [2022-07-12 06:26:29,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 06:26:29,928 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 4 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 06:26:29,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 123 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 06:26:29,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-12 06:26:29,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-07-12 06:26:29,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-12 06:26:29,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2022-07-12 06:26:30,001 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2022-07-12 06:26:30,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:26:30,002 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2022-07-12 06:26:30,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 06:26:30,003 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2022-07-12 06:26:30,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-12 06:26:30,006 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:26:30,006 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:26:30,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 06:26:30,007 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:26:30,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:26:30,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1177745932, now seen corresponding path program 1 times [2022-07-12 06:26:30,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:26:30,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092660660] [2022-07-12 06:26:30,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:26:30,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:26:30,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:30,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:26:30,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:30,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 06:26:30,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:26:30,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092660660] [2022-07-12 06:26:30,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092660660] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 06:26:30,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 06:26:30,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 06:26:30,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321871788] [2022-07-12 06:26:30,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 06:26:30,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 06:26:30,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:26:30,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 06:26:30,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 06:26:30,107 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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) [2022-07-12 06:26:30,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:26:30,137 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2022-07-12 06:26:30,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 06:26:30,138 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 11 [2022-07-12 06:26:30,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:26:30,141 INFO L225 Difference]: With dead ends: 33 [2022-07-12 06:26:30,141 INFO L226 Difference]: Without dead ends: 29 [2022-07-12 06:26:30,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 06:26:30,154 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 06:26:30,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 122 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 06:26:30,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-12 06:26:30,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2022-07-12 06:26:30,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-12 06:26:30,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2022-07-12 06:26:30,166 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2022-07-12 06:26:30,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:26:30,167 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2022-07-12 06:26:30,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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) [2022-07-12 06:26:30,168 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2022-07-12 06:26:30,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-12 06:26:30,170 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:26:30,170 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:26:30,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 06:26:30,173 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:26:30,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:26:30,174 INFO L85 PathProgramCache]: Analyzing trace with hash 2110588723, now seen corresponding path program 1 times [2022-07-12 06:26:30,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:26:30,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620179481] [2022-07-12 06:26:30,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:26:30,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:26:30,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:30,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:26:30,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:30,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:30,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:30,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-12 06:26:30,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:30,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 06:26:30,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:26:30,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620179481] [2022-07-12 06:26:30,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620179481] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:26:30,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826517166] [2022-07-12 06:26:30,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:26:30,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:26:30,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:26:30,271 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) [2022-07-12 06:26:30,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 06:26:30,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:30,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 06:26:30,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:26:30,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 06:26:30,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:26:30,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 06:26:30,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826517166] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:26:30,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:26:30,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 13 [2022-07-12 06:26:30,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907862859] [2022-07-12 06:26:30,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:26:30,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 06:26:30,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:26:30,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 06:26:30,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-07-12 06:26:30,563 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 13 states, 10 states have (on average 3.2) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-12 06:26:30,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:26:30,720 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2022-07-12 06:26:30,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 06:26:30,720 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 3.2) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) Word has length 23 [2022-07-12 06:26:30,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:26:30,721 INFO L225 Difference]: With dead ends: 55 [2022-07-12 06:26:30,722 INFO L226 Difference]: Without dead ends: 31 [2022-07-12 06:26:30,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-07-12 06:26:30,723 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 32 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 06:26:30,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 112 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 06:26:30,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-12 06:26:30,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2022-07-12 06:26:30,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-12 06:26:30,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2022-07-12 06:26:30,734 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2022-07-12 06:26:30,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:26:30,735 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2022-07-12 06:26:30,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 3.2) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-12 06:26:30,735 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2022-07-12 06:26:30,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-12 06:26:30,738 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:26:30,739 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:26:30,762 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-12 06:26:30,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:26:30,961 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:26:30,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:26:30,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1277869167, now seen corresponding path program 1 times [2022-07-12 06:26:30,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:26:30,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209005484] [2022-07-12 06:26:30,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:26:30,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:26:30,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:31,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:26:31,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:31,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:31,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:31,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-12 06:26:31,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:31,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 06:26:31,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:26:31,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209005484] [2022-07-12 06:26:31,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209005484] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:26:31,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108965717] [2022-07-12 06:26:31,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:26:31,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:26:31,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:26:31,086 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) [2022-07-12 06:26:31,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 06:26:31,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:31,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 06:26:31,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:26:31,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 06:26:31,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:26:31,284 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 06:26:31,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108965717] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:26:31,284 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:26:31,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-07-12 06:26:31,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163305204] [2022-07-12 06:26:31,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:26:31,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 06:26:31,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:26:31,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 06:26:31,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-07-12 06:26:31,286 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-12 06:26:31,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:26:31,448 INFO L93 Difference]: Finished difference Result 51 states and 71 transitions. [2022-07-12 06:26:31,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 06:26:31,449 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) Word has length 24 [2022-07-12 06:26:31,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:26:31,451 INFO L225 Difference]: With dead ends: 51 [2022-07-12 06:26:31,454 INFO L226 Difference]: Without dead ends: 47 [2022-07-12 06:26:31,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-07-12 06:26:31,456 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 32 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 06:26:31,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 92 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 06:26:31,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-07-12 06:26:31,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2022-07-12 06:26:31,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 31 states have internal predecessors, (38), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) [2022-07-12 06:26:31,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2022-07-12 06:26:31,464 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 24 [2022-07-12 06:26:31,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:26:31,465 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2022-07-12 06:26:31,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-12 06:26:31,465 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2022-07-12 06:26:31,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-12 06:26:31,466 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:26:31,467 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:26:31,490 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-12 06:26:31,679 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,SelfDestructingSolverStorable3 [2022-07-12 06:26:31,680 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:26:31,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:26:31,680 INFO L85 PathProgramCache]: Analyzing trace with hash -2061621832, now seen corresponding path program 1 times [2022-07-12 06:26:31,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:26:31,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324111391] [2022-07-12 06:26:31,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:26:31,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:26:31,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:31,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:26:31,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:31,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:31,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:31,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:31,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:31,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-12 06:26:31,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:31,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-12 06:26:31,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:31,768 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 06:26:31,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:26:31,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324111391] [2022-07-12 06:26:31,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324111391] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:26:31,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976900009] [2022-07-12 06:26:31,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:26:31,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:26:31,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:26:31,775 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) [2022-07-12 06:26:31,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 06:26:31,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:31,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 06:26:31,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:26:31,873 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 06:26:31,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:26:32,187 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 06:26:32,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976900009] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:26:32,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:26:32,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 15 [2022-07-12 06:26:32,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120740486] [2022-07-12 06:26:32,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:26:32,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-12 06:26:32,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:26:32,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-12 06:26:32,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-07-12 06:26:32,190 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand has 15 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 15 states have internal predecessors, (47), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2022-07-12 06:26:32,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:26:32,427 INFO L93 Difference]: Finished difference Result 105 states and 167 transitions. [2022-07-12 06:26:32,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 06:26:32,428 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 15 states have internal predecessors, (47), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) Word has length 36 [2022-07-12 06:26:32,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:26:32,430 INFO L225 Difference]: With dead ends: 105 [2022-07-12 06:26:32,430 INFO L226 Difference]: Without dead ends: 63 [2022-07-12 06:26:32,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 75 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2022-07-12 06:26:32,432 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 65 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 06:26:32,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 95 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 06:26:32,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-07-12 06:26:32,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-07-12 06:26:32,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 44 states have internal predecessors, (51), 12 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (29), 13 states have call predecessors, (29), 12 states have call successors, (29) [2022-07-12 06:26:32,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 92 transitions. [2022-07-12 06:26:32,442 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 92 transitions. Word has length 36 [2022-07-12 06:26:32,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:26:32,443 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 92 transitions. [2022-07-12 06:26:32,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 15 states have internal predecessors, (47), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2022-07-12 06:26:32,443 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 92 transitions. [2022-07-12 06:26:32,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-12 06:26:32,444 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:26:32,445 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:26:32,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-12 06:26:32,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:26:32,647 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:26:32,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:26:32,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1167294498, now seen corresponding path program 1 times [2022-07-12 06:26:32,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:26:32,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805644825] [2022-07-12 06:26:32,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:26:32,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:26:32,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:32,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:26:32,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:32,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:32,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:32,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:32,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:32,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-12 06:26:32,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:32,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-12 06:26:32,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:32,757 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-12 06:26:32,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:26:32,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805644825] [2022-07-12 06:26:32,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805644825] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:26:32,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575687289] [2022-07-12 06:26:32,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:26:32,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:26:32,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:26:32,764 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) [2022-07-12 06:26:32,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 06:26:32,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:32,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 06:26:32,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:26:32,912 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 06:26:32,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:26:33,193 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 06:26:33,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575687289] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:26:33,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:26:33,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 18 [2022-07-12 06:26:33,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372653075] [2022-07-12 06:26:33,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:26:33,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 06:26:33,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:26:33,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 06:26:33,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-07-12 06:26:33,195 INFO L87 Difference]: Start difference. First operand 63 states and 92 transitions. Second operand has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2022-07-12 06:26:33,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:26:33,573 INFO L93 Difference]: Finished difference Result 177 states and 321 transitions. [2022-07-12 06:26:33,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-12 06:26:33,573 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) Word has length 37 [2022-07-12 06:26:33,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:26:33,584 INFO L225 Difference]: With dead ends: 177 [2022-07-12 06:26:33,587 INFO L226 Difference]: Without dead ends: 117 [2022-07-12 06:26:33,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2022-07-12 06:26:33,590 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 60 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 06:26:33,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 222 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 06:26:33,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-07-12 06:26:33,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 103. [2022-07-12 06:26:33,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 69 states have internal predecessors, (80), 21 states have call successors, (21), 7 states have call predecessors, (21), 15 states have return successors, (65), 26 states have call predecessors, (65), 21 states have call successors, (65) [2022-07-12 06:26:33,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 166 transitions. [2022-07-12 06:26:33,610 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 166 transitions. Word has length 37 [2022-07-12 06:26:33,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:26:33,610 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 166 transitions. [2022-07-12 06:26:33,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2022-07-12 06:26:33,610 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 166 transitions. [2022-07-12 06:26:33,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-12 06:26:33,613 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:26:33,613 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:26:33,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 06:26:33,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:26:33,828 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:26:33,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:26:33,828 INFO L85 PathProgramCache]: Analyzing trace with hash 384535367, now seen corresponding path program 1 times [2022-07-12 06:26:33,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:26:33,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127214500] [2022-07-12 06:26:33,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:26:33,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:26:33,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:33,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:26:33,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:33,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:33,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:33,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:33,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:33,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:33,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:33,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-12 06:26:33,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:33,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-12 06:26:33,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:33,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-12 06:26:33,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:33,976 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-12 06:26:33,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:26:33,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127214500] [2022-07-12 06:26:33,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127214500] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:26:33,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443868622] [2022-07-12 06:26:33,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:26:33,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:26:33,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:26:33,980 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) [2022-07-12 06:26:33,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 06:26:34,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:34,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-12 06:26:34,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:26:34,139 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-12 06:26:34,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:26:34,559 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 06:26:34,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443868622] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:26:34,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:26:34,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11] total 20 [2022-07-12 06:26:34,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111572048] [2022-07-12 06:26:34,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:26:34,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-12 06:26:34,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:26:34,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-12 06:26:34,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-07-12 06:26:34,565 INFO L87 Difference]: Start difference. First operand 103 states and 166 transitions. Second operand has 20 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 20 states have internal predecessors, (60), 14 states have call successors, (16), 1 states have call predecessors, (16), 8 states have return successors, (18), 7 states have call predecessors, (18), 14 states have call successors, (18) [2022-07-12 06:26:35,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:26:35,004 INFO L93 Difference]: Finished difference Result 255 states and 495 transitions. [2022-07-12 06:26:35,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-12 06:26:35,008 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 20 states have internal predecessors, (60), 14 states have call successors, (16), 1 states have call predecessors, (16), 8 states have return successors, (18), 7 states have call predecessors, (18), 14 states have call successors, (18) Word has length 51 [2022-07-12 06:26:35,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:26:35,011 INFO L225 Difference]: With dead ends: 255 [2022-07-12 06:26:35,011 INFO L226 Difference]: Without dead ends: 155 [2022-07-12 06:26:35,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2022-07-12 06:26:35,013 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 76 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 06:26:35,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 227 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 06:26:35,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-07-12 06:26:35,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 109. [2022-07-12 06:26:35,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 71 states have (on average 1.2253521126760563) internal successors, (87), 72 states have internal predecessors, (87), 24 states have call successors, (24), 9 states have call predecessors, (24), 13 states have return successors, (66), 27 states have call predecessors, (66), 24 states have call successors, (66) [2022-07-12 06:26:35,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 177 transitions. [2022-07-12 06:26:35,035 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 177 transitions. Word has length 51 [2022-07-12 06:26:35,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:26:35,035 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 177 transitions. [2022-07-12 06:26:35,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 20 states have internal predecessors, (60), 14 states have call successors, (16), 1 states have call predecessors, (16), 8 states have return successors, (18), 7 states have call predecessors, (18), 14 states have call successors, (18) [2022-07-12 06:26:35,035 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 177 transitions. [2022-07-12 06:26:35,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-12 06:26:35,039 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:26:35,040 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:26:35,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-12 06:26:35,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:26:35,264 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:26:35,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:26:35,264 INFO L85 PathProgramCache]: Analyzing trace with hash -586612948, now seen corresponding path program 1 times [2022-07-12 06:26:35,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:26:35,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245188119] [2022-07-12 06:26:35,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:26:35,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:26:35,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:35,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:26:35,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:35,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:35,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:35,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:35,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:35,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:35,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:35,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:35,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:35,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-12 06:26:35,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:35,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-12 06:26:35,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:35,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-12 06:26:35,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:35,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-12 06:26:35,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:35,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:35,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:35,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:35,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:35,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-12 06:26:35,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:35,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-12 06:26:35,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:35,483 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 40 proven. 57 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-07-12 06:26:35,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:26:35,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245188119] [2022-07-12 06:26:35,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245188119] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:26:35,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929937203] [2022-07-12 06:26:35,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:26:35,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:26:35,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:26:35,485 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) [2022-07-12 06:26:35,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 06:26:35,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:35,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-12 06:26:35,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:26:35,688 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 13 proven. 92 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-07-12 06:26:35,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:26:36,398 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 13 proven. 102 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-12 06:26:36,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929937203] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:26:36,399 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:26:36,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 23 [2022-07-12 06:26:36,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628067244] [2022-07-12 06:26:36,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:26:36,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-12 06:26:36,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:26:36,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-12 06:26:36,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-07-12 06:26:36,401 INFO L87 Difference]: Start difference. First operand 109 states and 177 transitions. Second operand has 23 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 23 states have internal predecessors, (76), 17 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (26), 11 states have call predecessors, (26), 17 states have call successors, (26) [2022-07-12 06:26:36,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:26:36,849 INFO L93 Difference]: Finished difference Result 240 states and 462 transitions. [2022-07-12 06:26:36,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-12 06:26:36,850 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 23 states have internal predecessors, (76), 17 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (26), 11 states have call predecessors, (26), 17 states have call successors, (26) Word has length 93 [2022-07-12 06:26:36,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:26:36,852 INFO L225 Difference]: With dead ends: 240 [2022-07-12 06:26:36,852 INFO L226 Difference]: Without dead ends: 107 [2022-07-12 06:26:36,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 198 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=972, Unknown=0, NotChecked=0, Total=1190 [2022-07-12 06:26:36,854 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 115 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 06:26:36,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 185 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 06:26:36,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-07-12 06:26:36,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2022-07-12 06:26:36,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 57 states have (on average 1.1754385964912282) internal successors, (67), 58 states have internal predecessors, (67), 14 states have call successors, (14), 8 states have call predecessors, (14), 12 states have return successors, (35), 17 states have call predecessors, (35), 14 states have call successors, (35) [2022-07-12 06:26:36,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 116 transitions. [2022-07-12 06:26:36,865 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 116 transitions. Word has length 93 [2022-07-12 06:26:36,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:26:36,866 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 116 transitions. [2022-07-12 06:26:36,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 23 states have internal predecessors, (76), 17 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (26), 11 states have call predecessors, (26), 17 states have call successors, (26) [2022-07-12 06:26:36,866 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 116 transitions. [2022-07-12 06:26:36,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-07-12 06:26:36,870 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:26:36,871 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:26:36,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-12 06:26:37,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:26:37,090 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:26:37,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:26:37,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1129417830, now seen corresponding path program 1 times [2022-07-12 06:26:37,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:26:37,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84436924] [2022-07-12 06:26:37,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:26:37,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:26:37,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:37,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:26:37,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:37,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:37,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:37,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:37,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:37,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:37,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:37,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:37,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:37,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:37,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:37,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-12 06:26:37,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:37,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-12 06:26:37,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:37,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-12 06:26:37,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:37,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-12 06:26:37,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:37,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:37,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:37,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:37,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:37,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:37,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:37,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-12 06:26:37,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:37,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-12 06:26:37,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:37,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-12 06:26:37,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:37,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-07-12 06:26:37,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:37,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:37,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:37,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:37,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:37,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-12 06:26:37,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:37,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-12 06:26:37,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:37,315 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 73 proven. 135 refuted. 0 times theorem prover too weak. 356 trivial. 0 not checked. [2022-07-12 06:26:37,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:26:37,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84436924] [2022-07-12 06:26:37,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84436924] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:26:37,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343484111] [2022-07-12 06:26:37,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:26:37,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:26:37,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:26:37,317 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) [2022-07-12 06:26:37,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 06:26:37,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:37,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-12 06:26:37,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:26:37,501 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 60 proven. 121 refuted. 0 times theorem prover too weak. 383 trivial. 0 not checked. [2022-07-12 06:26:37,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:26:38,109 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 60 proven. 126 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-07-12 06:26:38,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343484111] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:26:38,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:26:38,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 11] total 21 [2022-07-12 06:26:38,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182525483] [2022-07-12 06:26:38,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:26:38,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-12 06:26:38,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:26:38,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-12 06:26:38,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-07-12 06:26:38,115 INFO L87 Difference]: Start difference. First operand 84 states and 116 transitions. Second operand has 21 states, 20 states have (on average 3.5) internal successors, (70), 21 states have internal predecessors, (70), 14 states have call successors, (21), 1 states have call predecessors, (21), 8 states have return successors, (26), 12 states have call predecessors, (26), 14 states have call successors, (26) [2022-07-12 06:26:38,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:26:38,443 INFO L93 Difference]: Finished difference Result 169 states and 248 transitions. [2022-07-12 06:26:38,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 06:26:38,443 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.5) internal successors, (70), 21 states have internal predecessors, (70), 14 states have call successors, (21), 1 states have call predecessors, (21), 8 states have return successors, (26), 12 states have call predecessors, (26), 14 states have call successors, (26) Word has length 148 [2022-07-12 06:26:38,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:26:38,445 INFO L225 Difference]: With dead ends: 169 [2022-07-12 06:26:38,445 INFO L226 Difference]: Without dead ends: 93 [2022-07-12 06:26:38,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 329 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2022-07-12 06:26:38,447 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 88 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 06:26:38,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 208 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 06:26:38,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-12 06:26:38,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 87. [2022-07-12 06:26:38,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 59 states have (on average 1.1694915254237288) internal successors, (69), 60 states have internal predecessors, (69), 14 states have call successors, (14), 8 states have call predecessors, (14), 13 states have return successors, (35), 18 states have call predecessors, (35), 14 states have call successors, (35) [2022-07-12 06:26:38,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 118 transitions. [2022-07-12 06:26:38,455 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 118 transitions. Word has length 148 [2022-07-12 06:26:38,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:26:38,456 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 118 transitions. [2022-07-12 06:26:38,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.5) internal successors, (70), 21 states have internal predecessors, (70), 14 states have call successors, (21), 1 states have call predecessors, (21), 8 states have return successors, (26), 12 states have call predecessors, (26), 14 states have call successors, (26) [2022-07-12 06:26:38,456 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 118 transitions. [2022-07-12 06:26:38,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-07-12 06:26:38,458 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:26:38,458 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 10, 9, 9, 8, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:26:38,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-12 06:26:38,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:26:38,664 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:26:38,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:26:38,664 INFO L85 PathProgramCache]: Analyzing trace with hash -2043735506, now seen corresponding path program 2 times [2022-07-12 06:26:38,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:26:38,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770244335] [2022-07-12 06:26:38,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:26:38,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:26:38,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:38,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:26:38,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:38,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:38,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:38,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:38,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:38,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:38,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:38,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:38,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:38,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:38,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:38,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-12 06:26:38,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:38,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-12 06:26:38,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:38,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-12 06:26:38,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:38,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:38,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:38,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-12 06:26:38,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:38,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-12 06:26:38,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:38,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:38,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:38,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-12 06:26:38,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:38,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-07-12 06:26:38,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:38,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:38,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:38,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:38,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:38,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-12 06:26:38,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:38,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-12 06:26:38,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:38,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:38,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:38,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-12 06:26:38,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:38,931 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 112 proven. 115 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2022-07-12 06:26:38,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:26:38,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770244335] [2022-07-12 06:26:38,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770244335] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:26:38,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971080590] [2022-07-12 06:26:38,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 06:26:38,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:26:38,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:26:38,933 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) [2022-07-12 06:26:38,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 06:26:39,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 06:26:39,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:26:39,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-12 06:26:39,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:26:39,102 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 80 proven. 101 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2022-07-12 06:26:39,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:26:39,598 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 80 proven. 106 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2022-07-12 06:26:39,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971080590] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:26:39,599 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:26:39,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 11] total 21 [2022-07-12 06:26:39,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535688168] [2022-07-12 06:26:39,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:26:39,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-12 06:26:39,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:26:39,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-12 06:26:39,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-07-12 06:26:39,600 INFO L87 Difference]: Start difference. First operand 87 states and 118 transitions. Second operand has 21 states, 20 states have (on average 3.6) internal successors, (72), 21 states have internal predecessors, (72), 14 states have call successors, (21), 1 states have call predecessors, (21), 8 states have return successors, (26), 13 states have call predecessors, (26), 14 states have call successors, (26) [2022-07-12 06:26:39,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:26:39,899 INFO L93 Difference]: Finished difference Result 184 states and 267 transitions. [2022-07-12 06:26:39,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-12 06:26:39,900 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.6) internal successors, (72), 21 states have internal predecessors, (72), 14 states have call successors, (21), 1 states have call predecessors, (21), 8 states have return successors, (26), 13 states have call predecessors, (26), 14 states have call successors, (26) Word has length 148 [2022-07-12 06:26:39,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:26:39,901 INFO L225 Difference]: With dead ends: 184 [2022-07-12 06:26:39,901 INFO L226 Difference]: Without dead ends: 107 [2022-07-12 06:26:39,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 328 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=711, Unknown=0, NotChecked=0, Total=870 [2022-07-12 06:26:39,903 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 70 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 06:26:39,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 207 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 06:26:39,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-07-12 06:26:39,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 87. [2022-07-12 06:26:39,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 59 states have (on average 1.1694915254237288) internal successors, (69), 60 states have internal predecessors, (69), 14 states have call successors, (14), 8 states have call predecessors, (14), 13 states have return successors, (33), 18 states have call predecessors, (33), 14 states have call successors, (33) [2022-07-12 06:26:39,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 116 transitions. [2022-07-12 06:26:39,928 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 116 transitions. Word has length 148 [2022-07-12 06:26:39,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:26:39,929 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 116 transitions. [2022-07-12 06:26:39,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.6) internal successors, (72), 21 states have internal predecessors, (72), 14 states have call successors, (21), 1 states have call predecessors, (21), 8 states have return successors, (26), 13 states have call predecessors, (26), 14 states have call successors, (26) [2022-07-12 06:26:39,929 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 116 transitions. [2022-07-12 06:26:39,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-07-12 06:26:39,931 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:26:39,931 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 11, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:26:39,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-12 06:26:40,139 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,SelfDestructingSolverStorable9 [2022-07-12 06:26:40,140 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:26:40,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:26:40,140 INFO L85 PathProgramCache]: Analyzing trace with hash -552714558, now seen corresponding path program 3 times [2022-07-12 06:26:40,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:26:40,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165212406] [2022-07-12 06:26:40,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:26:40,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:26:40,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:40,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:26:40,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:40,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:40,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:40,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:40,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:40,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:40,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:40,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:40,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:40,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:40,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:40,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-12 06:26:40,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:40,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-12 06:26:40,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:40,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-12 06:26:40,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:40,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:40,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:40,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-12 06:26:40,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:40,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-12 06:26:40,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:40,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:40,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:40,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:40,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:40,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:40,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:40,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-12 06:26:40,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:40,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-12 06:26:40,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:40,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-12 06:26:40,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:40,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:40,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:40,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-12 06:26:40,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:40,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-07-12 06:26:40,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:40,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:40,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:40,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:40,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:40,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-12 06:26:40,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:40,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-12 06:26:40,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:40,469 INFO L134 CoverageAnalysis]: Checked inductivity of 787 backedges. 207 proven. 121 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2022-07-12 06:26:40,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:26:40,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165212406] [2022-07-12 06:26:40,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165212406] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:26:40,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085766676] [2022-07-12 06:26:40,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 06:26:40,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:26:40,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:26:40,471 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 06:26:40,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-12 06:26:40,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-12 06:26:40,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:26:40,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 06:26:40,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:26:40,614 INFO L134 CoverageAnalysis]: Checked inductivity of 787 backedges. 135 proven. 32 refuted. 0 times theorem prover too weak. 620 trivial. 0 not checked. [2022-07-12 06:26:40,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:26:41,045 INFO L134 CoverageAnalysis]: Checked inductivity of 787 backedges. 135 proven. 34 refuted. 0 times theorem prover too weak. 618 trivial. 0 not checked. [2022-07-12 06:26:41,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085766676] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:26:41,045 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:26:41,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8, 9] total 24 [2022-07-12 06:26:41,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469151357] [2022-07-12 06:26:41,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:26:41,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-12 06:26:41,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:26:41,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-12 06:26:41,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2022-07-12 06:26:41,049 INFO L87 Difference]: Start difference. First operand 87 states and 116 transitions. Second operand has 24 states, 23 states have (on average 3.130434782608696) internal successors, (72), 24 states have internal predecessors, (72), 13 states have call successors, (22), 1 states have call predecessors, (22), 10 states have return successors, (26), 18 states have call predecessors, (26), 13 states have call successors, (26) [2022-07-12 06:26:41,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:26:41,394 INFO L93 Difference]: Finished difference Result 187 states and 270 transitions. [2022-07-12 06:26:41,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-12 06:26:41,395 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.130434782608696) internal successors, (72), 24 states have internal predecessors, (72), 13 states have call successors, (22), 1 states have call predecessors, (22), 10 states have return successors, (26), 18 states have call predecessors, (26), 13 states have call successors, (26) Word has length 174 [2022-07-12 06:26:41,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:26:41,396 INFO L225 Difference]: With dead ends: 187 [2022-07-12 06:26:41,396 INFO L226 Difference]: Without dead ends: 106 [2022-07-12 06:26:41,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 388 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2022-07-12 06:26:41,398 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 90 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 06:26:41,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 220 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 06:26:41,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-07-12 06:26:41,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 87. [2022-07-12 06:26:41,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 59 states have (on average 1.1694915254237288) internal successors, (69), 60 states have internal predecessors, (69), 14 states have call successors, (14), 8 states have call predecessors, (14), 13 states have return successors, (29), 18 states have call predecessors, (29), 14 states have call successors, (29) [2022-07-12 06:26:41,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 112 transitions. [2022-07-12 06:26:41,405 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 112 transitions. Word has length 174 [2022-07-12 06:26:41,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:26:41,406 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 112 transitions. [2022-07-12 06:26:41,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.130434782608696) internal successors, (72), 24 states have internal predecessors, (72), 13 states have call successors, (22), 1 states have call predecessors, (22), 10 states have return successors, (26), 18 states have call predecessors, (26), 13 states have call successors, (26) [2022-07-12 06:26:41,406 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 112 transitions. [2022-07-12 06:26:41,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-07-12 06:26:41,413 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:26:41,413 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 15, 14, 14, 12, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:26:41,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-12 06:26:41,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:26:41,631 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:26:41,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:26:41,632 INFO L85 PathProgramCache]: Analyzing trace with hash -712391191, now seen corresponding path program 4 times [2022-07-12 06:26:41,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:26:41,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26150281] [2022-07-12 06:26:41,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:26:41,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:26:41,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:41,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:26:41,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:41,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:41,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:41,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:41,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:41,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:41,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:41,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:41,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:41,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:41,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:41,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-12 06:26:41,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:41,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-12 06:26:41,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:41,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-12 06:26:41,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:41,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:41,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:41,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-12 06:26:41,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:41,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-12 06:26:41,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:41,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:41,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:41,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:41,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:41,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-12 06:26:41,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:41,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-12 06:26:41,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:41,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-07-12 06:26:41,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:41,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:41,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:41,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:41,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:41,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:41,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:41,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:41,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:41,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-12 06:26:41,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:41,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-12 06:26:41,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:41,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-12 06:26:41,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:41,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:41,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:42,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-12 06:26:42,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:42,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-12 06:26:42,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:42,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:42,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:42,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:42,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:42,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-12 06:26:42,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:42,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-12 06:26:42,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:42,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 194 proven. 345 refuted. 0 times theorem prover too weak. 736 trivial. 0 not checked. [2022-07-12 06:26:42,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:26:42,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26150281] [2022-07-12 06:26:42,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26150281] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:26:42,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14491546] [2022-07-12 06:26:42,015 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 06:26:42,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:26:42,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:26:42,017 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 06:26:42,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-12 06:26:42,118 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 06:26:42,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:26:42,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-12 06:26:42,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:26:42,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 97 proven. 261 refuted. 0 times theorem prover too weak. 917 trivial. 0 not checked. [2022-07-12 06:26:42,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:26:43,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 101 proven. 265 refuted. 0 times theorem prover too weak. 909 trivial. 0 not checked. [2022-07-12 06:26:43,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14491546] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:26:43,120 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:26:43,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 10, 13] total 33 [2022-07-12 06:26:43,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860572590] [2022-07-12 06:26:43,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:26:43,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-12 06:26:43,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:26:43,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-12 06:26:43,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2022-07-12 06:26:43,137 INFO L87 Difference]: Start difference. First operand 87 states and 112 transitions. Second operand has 33 states, 32 states have (on average 2.875) internal successors, (92), 33 states have internal predecessors, (92), 19 states have call successors, (28), 1 states have call predecessors, (28), 15 states have return successors, (36), 25 states have call predecessors, (36), 19 states have call successors, (36) [2022-07-12 06:26:44,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:26:44,069 INFO L93 Difference]: Finished difference Result 250 states and 417 transitions. [2022-07-12 06:26:44,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-12 06:26:44,070 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.875) internal successors, (92), 33 states have internal predecessors, (92), 19 states have call successors, (28), 1 states have call predecessors, (28), 15 states have return successors, (36), 25 states have call predecessors, (36), 19 states have call successors, (36) Word has length 217 [2022-07-12 06:26:44,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:26:44,071 INFO L225 Difference]: With dead ends: 250 [2022-07-12 06:26:44,071 INFO L226 Difference]: Without dead ends: 131 [2022-07-12 06:26:44,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 538 GetRequests, 481 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 925 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=444, Invalid=2748, Unknown=0, NotChecked=0, Total=3192 [2022-07-12 06:26:44,073 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 147 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 1232 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 1517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 1232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 06:26:44,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 404 Invalid, 1517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 1232 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-12 06:26:44,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-07-12 06:26:44,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 123. [2022-07-12 06:26:44,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 86 states have (on average 1.1162790697674418) internal successors, (96), 83 states have internal predecessors, (96), 22 states have call successors, (22), 16 states have call predecessors, (22), 14 states have return successors, (30), 23 states have call predecessors, (30), 22 states have call successors, (30) [2022-07-12 06:26:44,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 148 transitions. [2022-07-12 06:26:44,081 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 148 transitions. Word has length 217 [2022-07-12 06:26:44,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:26:44,082 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 148 transitions. [2022-07-12 06:26:44,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.875) internal successors, (92), 33 states have internal predecessors, (92), 19 states have call successors, (28), 1 states have call predecessors, (28), 15 states have return successors, (36), 25 states have call predecessors, (36), 19 states have call successors, (36) [2022-07-12 06:26:44,082 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 148 transitions. [2022-07-12 06:26:44,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-07-12 06:26:44,088 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:26:44,088 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 12, 11, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:26:44,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-12 06:26:44,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-12 06:26:44,311 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:26:44,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:26:44,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1374317944, now seen corresponding path program 5 times [2022-07-12 06:26:44,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:26:44,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007849507] [2022-07-12 06:26:44,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:26:44,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:26:44,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:44,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:26:44,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:44,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:44,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:44,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:44,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:44,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:44,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:44,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:44,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:44,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:44,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:44,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:44,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:44,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-12 06:26:44,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:44,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-12 06:26:44,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:44,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-12 06:26:44,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:44,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:44,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:44,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-12 06:26:44,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:44,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-12 06:26:44,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:44,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:44,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:44,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-12 06:26:44,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:44,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-07-12 06:26:44,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:44,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:44,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:44,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:44,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:44,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-12 06:26:44,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:44,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-12 06:26:44,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:44,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-07-12 06:26:44,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:44,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:44,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:44,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:44,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:44,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:44,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:44,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-12 06:26:44,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:44,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-12 06:26:44,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:44,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-12 06:26:44,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:44,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:44,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:44,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-12 06:26:44,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:44,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 155 proven. 209 refuted. 0 times theorem prover too weak. 709 trivial. 0 not checked. [2022-07-12 06:26:44,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:26:44,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007849507] [2022-07-12 06:26:44,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007849507] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:26:44,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062591490] [2022-07-12 06:26:44,628 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 06:26:44,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:26:44,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:26:44,630 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 06:26:44,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-12 06:26:44,715 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-12 06:26:44,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:26:44,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-12 06:26:44,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:26:44,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 638 proven. 46 refuted. 0 times theorem prover too weak. 389 trivial. 0 not checked. [2022-07-12 06:26:44,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:26:45,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 143 proven. 256 refuted. 0 times theorem prover too weak. 674 trivial. 0 not checked. [2022-07-12 06:26:45,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062591490] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:26:45,702 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:26:45,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 25 [2022-07-12 06:26:45,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301078659] [2022-07-12 06:26:45,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:26:45,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-12 06:26:45,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:26:45,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-12 06:26:45,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-07-12 06:26:45,704 INFO L87 Difference]: Start difference. First operand 123 states and 148 transitions. Second operand has 25 states, 24 states have (on average 3.8333333333333335) internal successors, (92), 25 states have internal predecessors, (92), 14 states have call successors, (29), 2 states have call predecessors, (29), 9 states have return successors, (33), 14 states have call predecessors, (33), 14 states have call successors, (33) [2022-07-12 06:26:45,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:26:45,978 INFO L93 Difference]: Finished difference Result 226 states and 275 transitions. [2022-07-12 06:26:45,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-12 06:26:45,979 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.8333333333333335) internal successors, (92), 25 states have internal predecessors, (92), 14 states have call successors, (29), 2 states have call predecessors, (29), 9 states have return successors, (33), 14 states have call predecessors, (33), 14 states have call successors, (33) Word has length 201 [2022-07-12 06:26:45,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:26:45,980 INFO L225 Difference]: With dead ends: 226 [2022-07-12 06:26:45,980 INFO L226 Difference]: Without dead ends: 106 [2022-07-12 06:26:45,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 447 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=164, Invalid=828, Unknown=0, NotChecked=0, Total=992 [2022-07-12 06:26:45,981 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 87 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 06:26:45,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 264 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 06:26:45,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-07-12 06:26:45,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2022-07-12 06:26:45,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 77 states have (on average 1.077922077922078) internal successors, (83), 72 states have internal predecessors, (83), 16 states have call successors, (16), 16 states have call predecessors, (16), 12 states have return successors, (18), 17 states have call predecessors, (18), 16 states have call successors, (18) [2022-07-12 06:26:45,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 117 transitions. [2022-07-12 06:26:45,988 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 117 transitions. Word has length 201 [2022-07-12 06:26:45,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:26:45,988 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 117 transitions. [2022-07-12 06:26:45,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.8333333333333335) internal successors, (92), 25 states have internal predecessors, (92), 14 states have call successors, (29), 2 states have call predecessors, (29), 9 states have return successors, (33), 14 states have call predecessors, (33), 14 states have call successors, (33) [2022-07-12 06:26:45,989 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 117 transitions. [2022-07-12 06:26:45,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-07-12 06:26:45,990 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:26:45,990 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:26:46,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-12 06:26:46,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-12 06:26:46,199 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:26:46,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:26:46,200 INFO L85 PathProgramCache]: Analyzing trace with hash 521886258, now seen corresponding path program 6 times [2022-07-12 06:26:46,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:26:46,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846236069] [2022-07-12 06:26:46,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:26:46,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:26:46,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 06:26:46,225 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 06:26:46,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 06:26:46,269 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 06:26:46,269 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 06:26:46,270 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-12 06:26:46,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-12 06:26:46,274 INFO L356 BasicCegarLoop]: Path program histogram: [6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:26:46,277 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-12 06:26:46,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.07 06:26:46 BoogieIcfgContainer [2022-07-12 06:26:46,338 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-12 06:26:46,338 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-12 06:26:46,338 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-12 06:26:46,339 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-12 06:26:46,339 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:26:29" (3/4) ... [2022-07-12 06:26:46,340 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-07-12 06:26:46,402 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-12 06:26:46,403 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-12 06:26:46,403 INFO L158 Benchmark]: Toolchain (without parser) took 17545.00ms. Allocated memory was 100.7MB in the beginning and 237.0MB in the end (delta: 136.3MB). Free memory was 71.6MB in the beginning and 165.3MB in the end (delta: -93.7MB). Peak memory consumption was 42.8MB. Max. memory is 16.1GB. [2022-07-12 06:26:46,403 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 100.7MB. Free memory is still 57.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-12 06:26:46,404 INFO L158 Benchmark]: CACSL2BoogieTranslator took 235.28ms. Allocated memory was 100.7MB in the beginning and 136.3MB in the end (delta: 35.7MB). Free memory was 71.3MB in the beginning and 112.4MB in the end (delta: -41.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-12 06:26:46,404 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.31ms. Allocated memory is still 136.3MB. Free memory was 112.0MB in the beginning and 110.8MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-12 06:26:46,405 INFO L158 Benchmark]: Boogie Preprocessor took 32.11ms. Allocated memory is still 136.3MB. Free memory was 110.8MB in the beginning and 109.9MB in the end (delta: 908.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-12 06:26:46,405 INFO L158 Benchmark]: RCFGBuilder took 296.30ms. Allocated memory is still 136.3MB. Free memory was 109.9MB in the beginning and 100.4MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-12 06:26:46,405 INFO L158 Benchmark]: TraceAbstraction took 16879.68ms. Allocated memory was 136.3MB in the beginning and 237.0MB in the end (delta: 100.7MB). Free memory was 99.9MB in the beginning and 170.6MB in the end (delta: -70.7MB). Peak memory consumption was 33.4MB. Max. memory is 16.1GB. [2022-07-12 06:26:46,405 INFO L158 Benchmark]: Witness Printer took 64.35ms. Allocated memory is still 237.0MB. Free memory was 170.6MB in the beginning and 165.3MB in the end (delta: 5.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-07-12 06:26:46,407 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 100.7MB. Free memory is still 57.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 235.28ms. Allocated memory was 100.7MB in the beginning and 136.3MB in the end (delta: 35.7MB). Free memory was 71.3MB in the beginning and 112.4MB in the end (delta: -41.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 25.31ms. Allocated memory is still 136.3MB. Free memory was 112.0MB in the beginning and 110.8MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 32.11ms. Allocated memory is still 136.3MB. Free memory was 110.8MB in the beginning and 109.9MB in the end (delta: 908.6kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 296.30ms. Allocated memory is still 136.3MB. Free memory was 109.9MB in the beginning and 100.4MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 16879.68ms. Allocated memory was 136.3MB in the beginning and 237.0MB in the end (delta: 100.7MB). Free memory was 99.9MB in the beginning and 170.6MB in the end (delta: -70.7MB). Peak memory consumption was 33.4MB. Max. memory is 16.1GB. * Witness Printer took 64.35ms. Allocated memory is still 237.0MB. Free memory was 170.6MB in the beginning and 165.3MB in the end (delta: 5.3MB). Peak memory consumption was 4.2MB. 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 - CounterExampleResult [Line: 41]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L38] int x = 6; VAL [x=6] [L39] CALL, EXPR fibo1(x) VAL [\old(n)=6] [L10] COND FALSE !(n < 1) VAL [\old(n)=6, n=6] [L12] COND FALSE !(n == 1) VAL [\old(n)=6, n=6] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=5] [L20] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L22] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=4] [L10] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L12] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=3] [L20] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L22] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L10] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L12] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1, n=1] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L20] COND TRUE n < 1 [L21] return 0; VAL [\old(n)=0, \result=0, n=0] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1, n=1] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=4, fibo2(n-1)=2, n=4] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=2] [L20] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L22] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1, n=1] [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L10] COND TRUE n < 1 [L11] return 0; VAL [\old(n)=0, \result=0, n=0] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=4, fibo2(n-1)=2, fibo2(n-2)=1, n=4] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=5, fibo1(n-1)=3, n=5] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=3] [L10] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L12] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L20] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L22] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1, n=1] [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L10] COND TRUE n < 1 [L11] return 0; VAL [\old(n)=0, \result=0, n=0] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1, n=1] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=5, fibo1(n-1)=3, fibo1(n-2)=2, n=5] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=6, fibo2(n-1)=5, n=6] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=4] [L20] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L22] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=3] [L10] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L12] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L20] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L22] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1, n=1] [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L10] COND TRUE n < 1 [L11] return 0; VAL [\old(n)=0, \result=0, n=0] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1, n=1] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=4, fibo1(n-1)=2, n=4] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=2] [L10] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L12] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1, n=1] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L20] COND TRUE n < 1 [L21] return 0; VAL [\old(n)=0, \result=0, n=0] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=4, fibo1(n-1)=2, fibo1(n-2)=1, n=4] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=6, fibo2(n-1)=5, fibo2(n-2)=3, n=6] [L15] return fibo2(n-1) + fibo2(n-2); [L39] RET, EXPR fibo1(x) VAL [fibo1(x)=8, x=6] [L39] int result = fibo1(x); [L40] COND TRUE result == 8 VAL [result=8, x=6] [L41] reach_error() VAL [result=8, x=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 16.7s, OverallIterations: 14, TraceHistogramMax: 17, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.1s, AutomataDifference: 4.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 935 SdHoareTripleChecker+Valid, 2.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 866 mSDsluCounter, 2481 SdHoareTripleChecker+Invalid, 2.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2097 mSDsCounter, 989 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5109 IncrementalHoareTripleChecker+Invalid, 6098 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 989 mSolverCounterUnsat, 384 mSDtfsCounter, 5109 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2869 GetRequests, 2540 SyntacticMatches, 19 SemanticMatches, 310 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2151 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=123occurred in iteration=12, InterpolantAutomatonStates: 233, 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, 13 MinimizatonAttempts, 142 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 8.5s InterpolantComputationTime, 2499 NumberOfCodeBlocks, 2231 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 3442 ConstructedInterpolants, 0 QuantifiedInterpolants, 5883 SizeOfPredicates, 40 NumberOfNonLiveVariables, 2157 ConjunctsInSsa, 102 ConjunctsInUnsatCore, 35 InterpolantComputations, 2 PerfectInterpolantSequences, 10983/13626 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-07-12 06:26:46,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE