./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/reducercommutativity/sep60-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 26d01a9c 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/reducercommutativity/sep60-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b065e6ebd473a7ead2bba44643aa633e2e19aa846c3de415abaad6e73d224b64 --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-16 23:20:56,018 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-16 23:20:56,019 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-16 23:20:56,059 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-16 23:20:56,059 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-16 23:20:56,062 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-16 23:20:56,063 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-16 23:20:56,065 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-16 23:20:56,067 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-16 23:20:56,071 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-16 23:20:56,072 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-16 23:20:56,073 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-16 23:20:56,073 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-16 23:20:56,075 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-16 23:20:56,076 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-16 23:20:56,077 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-16 23:20:56,078 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-16 23:20:56,079 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-16 23:20:56,079 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-16 23:20:56,083 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-16 23:20:56,084 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-16 23:20:56,085 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-16 23:20:56,086 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-16 23:20:56,086 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-16 23:20:56,092 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-16 23:20:56,092 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-16 23:20:56,092 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-16 23:20:56,094 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-16 23:20:56,095 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-16 23:20:56,095 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-16 23:20:56,095 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-16 23:20:56,096 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-16 23:20:56,097 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-16 23:20:56,097 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-16 23:20:56,098 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-16 23:20:56,098 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-16 23:20:56,098 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-16 23:20:56,099 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-16 23:20:56,099 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-16 23:20:56,100 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-16 23:20:56,100 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-16 23:20:56,102 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-16 23:20:56,123 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-16 23:20:56,124 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-16 23:20:56,130 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-16 23:20:56,130 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-16 23:20:56,131 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-16 23:20:56,131 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-16 23:20:56,132 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-16 23:20:56,132 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-16 23:20:56,132 INFO L138 SettingsManager]: * Use SBE=true [2023-02-16 23:20:56,132 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-16 23:20:56,133 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-16 23:20:56,133 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-16 23:20:56,133 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-16 23:20:56,133 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-16 23:20:56,134 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-16 23:20:56,134 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-16 23:20:56,134 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-16 23:20:56,134 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-16 23:20:56,134 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-16 23:20:56,135 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-16 23:20:56,135 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-16 23:20:56,138 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-16 23:20:56,138 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-16 23:20:56,138 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-16 23:20:56,139 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 23:20:56,139 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-16 23:20:56,139 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-16 23:20:56,139 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-16 23:20:56,139 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-16 23:20:56,139 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-16 23:20:56,139 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-16 23:20:56,140 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-16 23:20:56,140 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-16 23:20:56,140 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-16 23:20:56,140 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-16 23:20:56,140 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b065e6ebd473a7ead2bba44643aa633e2e19aa846c3de415abaad6e73d224b64 [2023-02-16 23:20:56,318 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-16 23:20:56,335 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-16 23:20:56,337 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-16 23:20:56,338 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-16 23:20:56,338 INFO L275 PluginConnector]: CDTParser initialized [2023-02-16 23:20:56,339 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/sep60-2.i [2023-02-16 23:20:57,347 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-16 23:20:57,555 INFO L351 CDTParser]: Found 1 translation units. [2023-02-16 23:20:57,556 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sep60-2.i [2023-02-16 23:20:57,561 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/247f5f59f/c691bc0ba5a54c458a6261223105d2fd/FLAG829d6106f [2023-02-16 23:20:57,579 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/247f5f59f/c691bc0ba5a54c458a6261223105d2fd [2023-02-16 23:20:57,581 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-16 23:20:57,582 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-16 23:20:57,583 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-16 23:20:57,584 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-16 23:20:57,586 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-16 23:20:57,586 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 11:20:57" (1/1) ... [2023-02-16 23:20:57,587 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22453d39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:20:57, skipping insertion in model container [2023-02-16 23:20:57,587 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 11:20:57" (1/1) ... [2023-02-16 23:20:57,593 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-16 23:20:57,609 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-16 23:20:57,704 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sep60-2.i[1293,1306] [2023-02-16 23:20:57,707 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 23:20:57,713 INFO L203 MainTranslator]: Completed pre-run [2023-02-16 23:20:57,726 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sep60-2.i[1293,1306] [2023-02-16 23:20:57,727 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 23:20:57,736 INFO L208 MainTranslator]: Completed translation [2023-02-16 23:20:57,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:20:57 WrapperNode [2023-02-16 23:20:57,737 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-16 23:20:57,738 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-16 23:20:57,738 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-16 23:20:57,738 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-16 23:20:57,743 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:20:57" (1/1) ... [2023-02-16 23:20:57,747 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:20:57" (1/1) ... [2023-02-16 23:20:57,759 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2023-02-16 23:20:57,760 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-16 23:20:57,760 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-16 23:20:57,760 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-16 23:20:57,760 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-16 23:20:57,766 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:20:57" (1/1) ... [2023-02-16 23:20:57,767 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:20:57" (1/1) ... [2023-02-16 23:20:57,768 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:20:57" (1/1) ... [2023-02-16 23:20:57,768 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:20:57" (1/1) ... [2023-02-16 23:20:57,772 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:20:57" (1/1) ... [2023-02-16 23:20:57,775 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:20:57" (1/1) ... [2023-02-16 23:20:57,776 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:20:57" (1/1) ... [2023-02-16 23:20:57,776 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:20:57" (1/1) ... [2023-02-16 23:20:57,778 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-16 23:20:57,779 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-16 23:20:57,779 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-16 23:20:57,779 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-16 23:20:57,779 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:20:57" (1/1) ... [2023-02-16 23:20:57,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 23:20:57,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:20:57,814 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-16 23:20:57,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-16 23:20:57,866 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-16 23:20:57,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-16 23:20:57,866 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-16 23:20:57,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-16 23:20:57,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-16 23:20:57,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-16 23:20:57,868 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-16 23:20:57,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-16 23:20:57,868 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2023-02-16 23:20:57,869 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2023-02-16 23:20:57,936 INFO L235 CfgBuilder]: Building ICFG [2023-02-16 23:20:57,937 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-16 23:20:58,085 INFO L276 CfgBuilder]: Performing block encoding [2023-02-16 23:20:58,089 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-16 23:20:58,089 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-16 23:20:58,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 11:20:58 BoogieIcfgContainer [2023-02-16 23:20:58,091 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-16 23:20:58,092 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-16 23:20:58,092 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-16 23:20:58,094 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-16 23:20:58,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.02 11:20:57" (1/3) ... [2023-02-16 23:20:58,095 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f6f8eb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 11:20:58, skipping insertion in model container [2023-02-16 23:20:58,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 11:20:57" (2/3) ... [2023-02-16 23:20:58,095 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f6f8eb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 11:20:58, skipping insertion in model container [2023-02-16 23:20:58,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 11:20:58" (3/3) ... [2023-02-16 23:20:58,096 INFO L112 eAbstractionObserver]: Analyzing ICFG sep60-2.i [2023-02-16 23:20:58,108 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-16 23:20:58,109 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-16 23:20:58,147 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-16 23:20:58,155 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@787ae2eb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-16 23:20:58,156 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-16 23:20:58,159 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 23:20:58,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-16 23:20:58,166 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:20:58,166 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:20:58,167 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:20:58,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:20:58,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1312709850, now seen corresponding path program 1 times [2023-02-16 23:20:58,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:20:58,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077371397] [2023-02-16 23:20:58,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:20:58,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:20:58,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:20:58,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-16 23:20:58,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:20:58,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-02-16 23:20:58,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:20:58,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-02-16 23:20:58,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:20:58,355 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-16 23:20:58,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:20:58,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077371397] [2023-02-16 23:20:58,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077371397] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 23:20:58,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 23:20:58,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-16 23:20:58,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746862040] [2023-02-16 23:20:58,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 23:20:58,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 23:20:58,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:20:58,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 23:20:58,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 23:20:58,398 INFO L87 Difference]: Start difference. First operand has 27 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-16 23:20:58,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:20:58,425 INFO L93 Difference]: Finished difference Result 52 states and 73 transitions. [2023-02-16 23:20:58,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 23:20:58,432 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2023-02-16 23:20:58,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:20:58,436 INFO L225 Difference]: With dead ends: 52 [2023-02-16 23:20:58,436 INFO L226 Difference]: Without dead ends: 25 [2023-02-16 23:20:58,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-16 23:20:58,440 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 23:20:58,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 58 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 23:20:58,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-02-16 23:20:58,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2023-02-16 23:20:58,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 23:20:58,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2023-02-16 23:20:58,468 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 28 [2023-02-16 23:20:58,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:20:58,469 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2023-02-16 23:20:58,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-16 23:20:58,470 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2023-02-16 23:20:58,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-16 23:20:58,472 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:20:58,473 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:20:58,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-16 23:20:58,474 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:20:58,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:20:58,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1845794557, now seen corresponding path program 1 times [2023-02-16 23:20:58,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:20:58,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55173241] [2023-02-16 23:20:58,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:20:58,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:20:58,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:20:58,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 23:20:58,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:20:58,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-16 23:20:58,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:20:58,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-02-16 23:20:58,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:20:58,667 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-16 23:20:58,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:20:58,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55173241] [2023-02-16 23:20:58,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55173241] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 23:20:58,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357135612] [2023-02-16 23:20:58,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:20:58,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:20:58,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:20:58,675 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 23:20:58,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-16 23:20:58,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:20:58,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-16 23:20:58,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:20:58,781 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-16 23:20:58,782 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 23:20:58,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357135612] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 23:20:58,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-16 23:20:58,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-02-16 23:20:58,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915220874] [2023-02-16 23:20:58,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 23:20:58,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 23:20:58,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:20:58,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 23:20:58,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-16 23:20:58,784 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-16 23:20:58,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:20:58,792 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2023-02-16 23:20:58,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 23:20:58,793 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2023-02-16 23:20:58,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:20:58,793 INFO L225 Difference]: With dead ends: 45 [2023-02-16 23:20:58,793 INFO L226 Difference]: Without dead ends: 27 [2023-02-16 23:20:58,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-16 23:20:58,795 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 3 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 23:20:58,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 50 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 23:20:58,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-16 23:20:58,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2023-02-16 23:20:58,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 23:20:58,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2023-02-16 23:20:58,798 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 30 [2023-02-16 23:20:58,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:20:58,799 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2023-02-16 23:20:58,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-16 23:20:58,799 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2023-02-16 23:20:58,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-16 23:20:58,800 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:20:58,800 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:20:58,807 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-16 23:20:59,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:20:59,007 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:20:59,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:20:59,008 INFO L85 PathProgramCache]: Analyzing trace with hash -701057785, now seen corresponding path program 1 times [2023-02-16 23:20:59,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:20:59,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933691673] [2023-02-16 23:20:59,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:20:59,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:20:59,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:20:59,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 23:20:59,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:20:59,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-02-16 23:20:59,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:20:59,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-16 23:20:59,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:20:59,134 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-16 23:20:59,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:20:59,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933691673] [2023-02-16 23:20:59,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933691673] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 23:20:59,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127265566] [2023-02-16 23:20:59,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:20:59,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:20:59,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:20:59,138 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 23:20:59,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-16 23:20:59,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:20:59,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-16 23:20:59,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:20:59,202 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-16 23:20:59,202 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 23:20:59,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127265566] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 23:20:59,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-16 23:20:59,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-02-16 23:20:59,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157150213] [2023-02-16 23:20:59,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 23:20:59,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-16 23:20:59,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:20:59,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-16 23:20:59,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-16 23:20:59,205 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-16 23:20:59,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:20:59,212 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2023-02-16 23:20:59,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-16 23:20:59,213 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2023-02-16 23:20:59,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:20:59,214 INFO L225 Difference]: With dead ends: 41 [2023-02-16 23:20:59,214 INFO L226 Difference]: Without dead ends: 27 [2023-02-16 23:20:59,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-16 23:20:59,215 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 23:20:59,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 49 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 23:20:59,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-16 23:20:59,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2023-02-16 23:20:59,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 23:20:59,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2023-02-16 23:20:59,219 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 39 [2023-02-16 23:20:59,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:20:59,220 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2023-02-16 23:20:59,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-16 23:20:59,220 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2023-02-16 23:20:59,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-16 23:20:59,221 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:20:59,221 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:20:59,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-16 23:20:59,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-02-16 23:20:59,426 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:20:59,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:20:59,427 INFO L85 PathProgramCache]: Analyzing trace with hash -235909079, now seen corresponding path program 1 times [2023-02-16 23:20:59,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:20:59,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24220598] [2023-02-16 23:20:59,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:20:59,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:20:59,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:20:59,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-16 23:20:59,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:20:59,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-02-16 23:20:59,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:20:59,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-16 23:20:59,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:20:59,548 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-16 23:20:59,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:20:59,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24220598] [2023-02-16 23:20:59,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24220598] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 23:20:59,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468326074] [2023-02-16 23:20:59,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:20:59,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:20:59,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:20:59,551 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 23:20:59,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-16 23:20:59,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:20:59,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-16 23:20:59,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:20:59,619 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-16 23:20:59,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 23:20:59,636 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-16 23:20:59,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468326074] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 23:20:59,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 23:20:59,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2023-02-16 23:20:59,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547666679] [2023-02-16 23:20:59,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 23:20:59,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-16 23:20:59,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:20:59,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-16 23:20:59,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-02-16 23:20:59,639 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-16 23:20:59,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:20:59,680 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2023-02-16 23:20:59,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-16 23:20:59,681 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 41 [2023-02-16 23:20:59,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:20:59,692 INFO L225 Difference]: With dead ends: 58 [2023-02-16 23:20:59,693 INFO L226 Difference]: Without dead ends: 37 [2023-02-16 23:20:59,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-02-16 23:20:59,697 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 23:20:59,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 156 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 23:20:59,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-02-16 23:20:59,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2023-02-16 23:20:59,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 23:20:59,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2023-02-16 23:20:59,709 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 41 [2023-02-16 23:20:59,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:20:59,709 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2023-02-16 23:20:59,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-16 23:20:59,710 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2023-02-16 23:20:59,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-16 23:20:59,714 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:20:59,726 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:20:59,731 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-16 23:20:59,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:20:59,932 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:20:59,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:20:59,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1946429025, now seen corresponding path program 2 times [2023-02-16 23:20:59,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:20:59,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198918918] [2023-02-16 23:20:59,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:20:59,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:20:59,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:21:00,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-16 23:21:00,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:21:00,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-16 23:21:00,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:21:00,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-02-16 23:21:00,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:21:00,040 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-02-16 23:21:00,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:21:00,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198918918] [2023-02-16 23:21:00,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198918918] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 23:21:00,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511311834] [2023-02-16 23:21:00,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 23:21:00,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:21:00,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:21:00,042 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 23:21:00,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-16 23:21:00,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 23:21:00,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 23:21:00,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-16 23:21:00,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:21:00,159 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-02-16 23:21:00,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 23:21:00,207 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-02-16 23:21:00,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511311834] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 23:21:00,208 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 23:21:00,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2023-02-16 23:21:00,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130385237] [2023-02-16 23:21:00,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 23:21:00,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-16 23:21:00,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:21:00,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-16 23:21:00,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-16 23:21:00,211 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-16 23:21:00,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:21:00,255 INFO L93 Difference]: Finished difference Result 74 states and 92 transitions. [2023-02-16 23:21:00,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-16 23:21:00,256 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 56 [2023-02-16 23:21:00,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:21:00,257 INFO L225 Difference]: With dead ends: 74 [2023-02-16 23:21:00,258 INFO L226 Difference]: Without dead ends: 50 [2023-02-16 23:21:00,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-16 23:21:00,258 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 3 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 23:21:00,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 111 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 23:21:00,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-02-16 23:21:00,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2023-02-16 23:21:00,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 44 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 23:21:00,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2023-02-16 23:21:00,272 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 56 [2023-02-16 23:21:00,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:21:00,272 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2023-02-16 23:21:00,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-16 23:21:00,272 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2023-02-16 23:21:00,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-02-16 23:21:00,275 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:21:00,276 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:21:00,280 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-16 23:21:00,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:21:00,481 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:21:00,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:21:00,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1341839115, now seen corresponding path program 3 times [2023-02-16 23:21:00,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:21:00,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768319723] [2023-02-16 23:21:00,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:21:00,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:21:00,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:21:00,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-16 23:21:00,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:21:00,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-16 23:21:00,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:21:00,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-02-16 23:21:00,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:21:00,712 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-02-16 23:21:00,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:21:00,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768319723] [2023-02-16 23:21:00,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768319723] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 23:21:00,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824494528] [2023-02-16 23:21:00,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 23:21:00,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:21:00,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:21:00,715 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 23:21:00,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-16 23:21:00,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-16 23:21:00,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 23:21:00,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-16 23:21:00,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:21:00,807 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2023-02-16 23:21:00,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 23:21:00,843 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2023-02-16 23:21:00,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824494528] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 23:21:00,844 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 23:21:00,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2023-02-16 23:21:00,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408862800] [2023-02-16 23:21:00,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 23:21:00,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-16 23:21:00,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:21:00,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-16 23:21:00,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-02-16 23:21:00,851 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-16 23:21:00,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:21:00,900 INFO L93 Difference]: Finished difference Result 90 states and 113 transitions. [2023-02-16 23:21:00,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-16 23:21:00,900 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 70 [2023-02-16 23:21:00,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:21:00,902 INFO L225 Difference]: With dead ends: 90 [2023-02-16 23:21:00,903 INFO L226 Difference]: Without dead ends: 64 [2023-02-16 23:21:00,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-02-16 23:21:00,904 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 18 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 23:21:00,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 118 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 23:21:00,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-02-16 23:21:00,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2023-02-16 23:21:00,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 58 states have internal predecessors, (67), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 23:21:00,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2023-02-16 23:21:00,912 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 70 [2023-02-16 23:21:00,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:21:00,913 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2023-02-16 23:21:00,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-16 23:21:00,913 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2023-02-16 23:21:00,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-02-16 23:21:00,916 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:21:00,916 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 11, 11, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:21:00,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-16 23:21:01,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:21:01,121 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:21:01,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:21:01,122 INFO L85 PathProgramCache]: Analyzing trace with hash 2138241293, now seen corresponding path program 4 times [2023-02-16 23:21:01,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:21:01,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298588495] [2023-02-16 23:21:01,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:21:01,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:21:01,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:21:01,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-02-16 23:21:01,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:21:01,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-02-16 23:21:01,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:21:01,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-02-16 23:21:01,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:21:01,423 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2023-02-16 23:21:01,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:21:01,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298588495] [2023-02-16 23:21:01,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298588495] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 23:21:01,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14894343] [2023-02-16 23:21:01,426 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-16 23:21:01,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:21:01,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:21:01,438 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 23:21:01,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-16 23:21:01,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-16 23:21:01,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 23:21:01,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-16 23:21:01,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:21:01,619 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2023-02-16 23:21:01,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 23:21:01,788 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2023-02-16 23:21:01,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14894343] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 23:21:01,788 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 23:21:01,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2023-02-16 23:21:01,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311134753] [2023-02-16 23:21:01,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 23:21:01,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-16 23:21:01,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:21:01,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-16 23:21:01,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2023-02-16 23:21:01,790 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand has 27 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 27 states have internal predecessors, (75), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-16 23:21:01,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:21:01,858 INFO L93 Difference]: Finished difference Result 127 states and 159 transitions. [2023-02-16 23:21:01,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-16 23:21:01,859 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 27 states have internal predecessors, (75), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 108 [2023-02-16 23:21:01,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:21:01,859 INFO L225 Difference]: With dead ends: 127 [2023-02-16 23:21:01,859 INFO L226 Difference]: Without dead ends: 89 [2023-02-16 23:21:01,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 198 SyntacticMatches, 11 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2023-02-16 23:21:01,860 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 2 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 23:21:01,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 74 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 23:21:01,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-02-16 23:21:01,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2023-02-16 23:21:01,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.1071428571428572) internal successors, (93), 84 states have internal predecessors, (93), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 23:21:01,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2023-02-16 23:21:01,865 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 108 [2023-02-16 23:21:01,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:21:01,865 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2023-02-16 23:21:01,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 27 states have internal predecessors, (75), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-16 23:21:01,865 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2023-02-16 23:21:01,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-02-16 23:21:01,866 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:21:01,866 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 18, 18, 18, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:21:01,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-16 23:21:02,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:21:02,072 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:21:02,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:21:02,073 INFO L85 PathProgramCache]: Analyzing trace with hash 819840039, now seen corresponding path program 5 times [2023-02-16 23:21:02,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:21:02,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849817777] [2023-02-16 23:21:02,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:21:02,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:21:02,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:21:02,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-02-16 23:21:02,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:21:02,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2023-02-16 23:21:02,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:21:02,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2023-02-16 23:21:02,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:21:02,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2023-02-16 23:21:02,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:21:02,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849817777] [2023-02-16 23:21:02,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849817777] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 23:21:02,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771226898] [2023-02-16 23:21:02,696 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-16 23:21:02,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:21:02,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:21:02,697 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 23:21:02,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-16 23:21:04,912 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2023-02-16 23:21:04,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 23:21:04,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-16 23:21:04,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:21:05,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 244 proven. 51 refuted. 0 times theorem prover too weak. 813 trivial. 0 not checked. [2023-02-16 23:21:05,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 23:21:05,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 809 trivial. 0 not checked. [2023-02-16 23:21:05,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771226898] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 23:21:05,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 23:21:05,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 9, 9] total 41 [2023-02-16 23:21:05,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36064212] [2023-02-16 23:21:05,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 23:21:05,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-02-16 23:21:05,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:21:05,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-02-16 23:21:05,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=1170, Unknown=0, NotChecked=0, Total=1640 [2023-02-16 23:21:05,172 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand has 41 states, 41 states have (on average 2.8780487804878048) internal successors, (118), 41 states have internal predecessors, (118), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-16 23:21:05,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:21:05,260 INFO L93 Difference]: Finished difference Result 154 states and 193 transitions. [2023-02-16 23:21:05,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-02-16 23:21:05,261 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.8780487804878048) internal successors, (118), 41 states have internal predecessors, (118), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 134 [2023-02-16 23:21:05,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:21:05,261 INFO L225 Difference]: With dead ends: 154 [2023-02-16 23:21:05,261 INFO L226 Difference]: Without dead ends: 116 [2023-02-16 23:21:05,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=470, Invalid=1170, Unknown=0, NotChecked=0, Total=1640 [2023-02-16 23:21:05,263 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 40 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 23:21:05,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 194 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 23:21:05,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-02-16 23:21:05,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2023-02-16 23:21:05,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.1545454545454545) internal successors, (127), 110 states have internal predecessors, (127), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 23:21:05,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 133 transitions. [2023-02-16 23:21:05,267 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 133 transitions. Word has length 134 [2023-02-16 23:21:05,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:21:05,268 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 133 transitions. [2023-02-16 23:21:05,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.8780487804878048) internal successors, (118), 41 states have internal predecessors, (118), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-16 23:21:05,268 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 133 transitions. [2023-02-16 23:21:05,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2023-02-16 23:21:05,269 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:21:05,269 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 25, 25, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:21:05,286 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-16 23:21:05,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:21:05,480 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:21:05,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:21:05,480 INFO L85 PathProgramCache]: Analyzing trace with hash 412352681, now seen corresponding path program 6 times [2023-02-16 23:21:05,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:21:05,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104658045] [2023-02-16 23:21:05,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:21:05,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:21:05,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:21:06,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-02-16 23:21:06,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:21:06,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2023-02-16 23:21:06,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:21:06,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2023-02-16 23:21:06,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:21:06,215 INFO L134 CoverageAnalysis]: Checked inductivity of 3353 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 2728 trivial. 0 not checked. [2023-02-16 23:21:06,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:21:06,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104658045] [2023-02-16 23:21:06,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104658045] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 23:21:06,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454851987] [2023-02-16 23:21:06,216 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-16 23:21:06,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:21:06,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:21:06,217 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 23:21:06,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-16 23:21:06,332 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-16 23:21:06,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 23:21:06,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-16 23:21:06,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:21:06,388 INFO L134 CoverageAnalysis]: Checked inductivity of 3353 backedges. 1242 proven. 4 refuted. 0 times theorem prover too weak. 2107 trivial. 0 not checked. [2023-02-16 23:21:06,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 23:21:06,421 INFO L134 CoverageAnalysis]: Checked inductivity of 3353 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3349 trivial. 0 not checked. [2023-02-16 23:21:06,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454851987] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 23:21:06,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 23:21:06,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 5, 5] total 34 [2023-02-16 23:21:06,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351876383] [2023-02-16 23:21:06,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 23:21:06,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-16 23:21:06,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:21:06,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-16 23:21:06,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=717, Unknown=0, NotChecked=0, Total=1122 [2023-02-16 23:21:06,424 INFO L87 Difference]: Start difference. First operand 115 states and 133 transitions. Second operand has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 34 states have internal predecessors, (93), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-16 23:21:06,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:21:06,495 INFO L93 Difference]: Finished difference Result 188 states and 228 transitions. [2023-02-16 23:21:06,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-16 23:21:06,496 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 34 states have internal predecessors, (93), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 208 [2023-02-16 23:21:06,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:21:06,497 INFO L225 Difference]: With dead ends: 188 [2023-02-16 23:21:06,497 INFO L226 Difference]: Without dead ends: 126 [2023-02-16 23:21:06,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 416 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=405, Invalid=717, Unknown=0, NotChecked=0, Total=1122 [2023-02-16 23:21:06,498 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 3 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 23:21:06,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 199 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 23:21:06,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-02-16 23:21:06,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2023-02-16 23:21:06,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.1416666666666666) internal successors, (137), 120 states have internal predecessors, (137), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 23:21:06,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 143 transitions. [2023-02-16 23:21:06,503 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 143 transitions. Word has length 208 [2023-02-16 23:21:06,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:21:06,503 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 143 transitions. [2023-02-16 23:21:06,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 34 states have internal predecessors, (93), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-16 23:21:06,503 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 143 transitions. [2023-02-16 23:21:06,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2023-02-16 23:21:06,504 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:21:06,504 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 26, 26, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:21:06,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-16 23:21:06,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-02-16 23:21:06,710 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:21:06,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:21:06,710 INFO L85 PathProgramCache]: Analyzing trace with hash 559440675, now seen corresponding path program 7 times [2023-02-16 23:21:06,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:21:06,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406807173] [2023-02-16 23:21:06,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:21:06,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:21:06,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:21:07,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-02-16 23:21:07,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:21:07,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2023-02-16 23:21:07,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:21:07,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2023-02-16 23:21:07,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:21:07,527 INFO L134 CoverageAnalysis]: Checked inductivity of 3436 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 2760 trivial. 0 not checked. [2023-02-16 23:21:07,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:21:07,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406807173] [2023-02-16 23:21:07,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406807173] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 23:21:07,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083687923] [2023-02-16 23:21:07,528 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-16 23:21:07,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:21:07,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:21:07,545 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) [2023-02-16 23:21:07,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-16 23:21:07,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:21:07,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-16 23:21:07,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:21:08,029 INFO L134 CoverageAnalysis]: Checked inductivity of 3436 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 2760 trivial. 0 not checked. [2023-02-16 23:21:08,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 23:21:08,776 INFO L134 CoverageAnalysis]: Checked inductivity of 3436 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 2760 trivial. 0 not checked. [2023-02-16 23:21:08,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083687923] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 23:21:08,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 23:21:08,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 57 [2023-02-16 23:21:08,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072927636] [2023-02-16 23:21:08,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 23:21:08,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-02-16 23:21:08,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:21:08,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-02-16 23:21:08,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2023-02-16 23:21:08,780 INFO L87 Difference]: Start difference. First operand 125 states and 143 transitions. Second operand has 57 states, 57 states have (on average 2.3684210526315788) internal successors, (135), 57 states have internal predecessors, (135), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-16 23:21:08,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:21:08,894 INFO L93 Difference]: Finished difference Result 251 states and 314 transitions. [2023-02-16 23:21:08,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-02-16 23:21:08,895 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.3684210526315788) internal successors, (135), 57 states have internal predecessors, (135), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 218 [2023-02-16 23:21:08,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:21:08,896 INFO L225 Difference]: With dead ends: 251 [2023-02-16 23:21:08,896 INFO L226 Difference]: Without dead ends: 181 [2023-02-16 23:21:08,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 388 SyntacticMatches, 26 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2023-02-16 23:21:08,897 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 2 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 23:21:08,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 170 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 23:21:08,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-02-16 23:21:08,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2023-02-16 23:21:08,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.0965909090909092) internal successors, (193), 176 states have internal predecessors, (193), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 23:21:08,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 199 transitions. [2023-02-16 23:21:08,902 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 199 transitions. Word has length 218 [2023-02-16 23:21:08,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:21:08,903 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 199 transitions. [2023-02-16 23:21:08,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.3684210526315788) internal successors, (135), 57 states have internal predecessors, (135), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-16 23:21:08,903 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 199 transitions. [2023-02-16 23:21:08,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2023-02-16 23:21:08,920 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:21:08,921 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 42, 42, 42, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:21:08,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-16 23:21:09,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-16 23:21:09,122 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:21:09,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:21:09,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1032547419, now seen corresponding path program 8 times [2023-02-16 23:21:09,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:21:09,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298272211] [2023-02-16 23:21:09,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:21:09,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:21:09,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:21:11,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2023-02-16 23:21:11,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:21:11,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2023-02-16 23:21:11,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:21:11,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2023-02-16 23:21:11,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:21:11,089 INFO L134 CoverageAnalysis]: Checked inductivity of 5676 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 2760 trivial. 0 not checked. [2023-02-16 23:21:11,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:21:11,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298272211] [2023-02-16 23:21:11,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298272211] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 23:21:11,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470951073] [2023-02-16 23:21:11,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 23:21:11,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:21:11,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:21:11,091 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) [2023-02-16 23:21:11,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-16 23:21:11,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 23:21:11,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 23:21:11,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 1033 conjuncts, 56 conjunts are in the unsatisfiable core [2023-02-16 23:21:11,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:21:12,224 INFO L134 CoverageAnalysis]: Checked inductivity of 5676 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 2760 trivial. 0 not checked. [2023-02-16 23:21:12,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 23:21:13,391 INFO L134 CoverageAnalysis]: Checked inductivity of 5676 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 2760 trivial. 0 not checked. [2023-02-16 23:21:13,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470951073] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 23:21:13,391 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 23:21:13,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 63 [2023-02-16 23:21:13,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46807968] [2023-02-16 23:21:13,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 23:21:13,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-02-16 23:21:13,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:21:13,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-02-16 23:21:13,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2023-02-16 23:21:13,409 INFO L87 Difference]: Start difference. First operand 181 states and 199 transitions. Second operand has 63 states, 63 states have (on average 2.365079365079365) internal successors, (149), 63 states have internal predecessors, (149), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-16 23:21:13,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:21:13,505 INFO L93 Difference]: Finished difference Result 263 states and 304 transitions. [2023-02-16 23:21:13,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-02-16 23:21:13,505 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.365079365079365) internal successors, (149), 63 states have internal predecessors, (149), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 274 [2023-02-16 23:21:13,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:21:13,508 INFO L225 Difference]: With dead ends: 263 [2023-02-16 23:21:13,508 INFO L226 Difference]: Without dead ends: 193 [2023-02-16 23:21:13,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 609 GetRequests, 444 SyntacticMatches, 104 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3229 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2023-02-16 23:21:13,509 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 23:21:13,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 98 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 23:21:13,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2023-02-16 23:21:13,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2023-02-16 23:21:13,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.0904255319148937) internal successors, (205), 188 states have internal predecessors, (205), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 23:21:13,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 211 transitions. [2023-02-16 23:21:13,524 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 211 transitions. Word has length 274 [2023-02-16 23:21:13,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:21:13,525 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 211 transitions. [2023-02-16 23:21:13,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.365079365079365) internal successors, (149), 63 states have internal predecessors, (149), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-16 23:21:13,525 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 211 transitions. [2023-02-16 23:21:13,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2023-02-16 23:21:13,527 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:21:13,527 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 42, 42, 42, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:21:13,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-16 23:21:13,734 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,SelfDestructingSolverStorable10 [2023-02-16 23:21:13,734 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:21:13,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:21:13,734 INFO L85 PathProgramCache]: Analyzing trace with hash -33288217, now seen corresponding path program 9 times [2023-02-16 23:21:13,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:21:13,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471941329] [2023-02-16 23:21:13,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:21:13,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:21:13,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:21:14,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2023-02-16 23:21:14,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:21:14,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2023-02-16 23:21:14,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:21:14,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 235 [2023-02-16 23:21:14,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:21:14,267 INFO L134 CoverageAnalysis]: Checked inductivity of 6360 backedges. 0 proven. 1527 refuted. 0 times theorem prover too weak. 4833 trivial. 0 not checked. [2023-02-16 23:21:14,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:21:14,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471941329] [2023-02-16 23:21:14,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471941329] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 23:21:14,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103216074] [2023-02-16 23:21:14,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 23:21:14,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:21:14,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:21:14,269 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) [2023-02-16 23:21:14,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-16 23:21:14,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-02-16 23:21:14,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 23:21:14,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-16 23:21:14,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:21:14,607 INFO L134 CoverageAnalysis]: Checked inductivity of 6360 backedges. 1242 proven. 36 refuted. 0 times theorem prover too weak. 5082 trivial. 0 not checked. [2023-02-16 23:21:14,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 23:21:14,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6360 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6324 trivial. 0 not checked. [2023-02-16 23:21:14,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103216074] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 23:21:14,723 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 23:21:14,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 31 [2023-02-16 23:21:14,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871685477] [2023-02-16 23:21:14,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 23:21:14,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-16 23:21:14,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:21:14,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-16 23:21:14,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2023-02-16 23:21:14,725 INFO L87 Difference]: Start difference. First operand 193 states and 211 transitions. Second operand has 31 states, 31 states have (on average 3.2580645161290325) internal successors, (101), 31 states have internal predecessors, (101), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-16 23:21:14,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:21:14,782 INFO L93 Difference]: Finished difference Result 283 states and 331 transitions. [2023-02-16 23:21:14,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-16 23:21:14,783 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.2580645161290325) internal successors, (101), 31 states have internal predecessors, (101), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 286 [2023-02-16 23:21:14,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:21:14,784 INFO L225 Difference]: With dead ends: 283 [2023-02-16 23:21:14,784 INFO L226 Difference]: Without dead ends: 214 [2023-02-16 23:21:14,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 564 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2023-02-16 23:21:14,785 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 52 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 23:21:14,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 137 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 23:21:14,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2023-02-16 23:21:14,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 212. [2023-02-16 23:21:14,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 207 states have (on average 1.0869565217391304) internal successors, (225), 207 states have internal predecessors, (225), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 23:21:14,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 231 transitions. [2023-02-16 23:21:14,790 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 231 transitions. Word has length 286 [2023-02-16 23:21:14,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:21:14,791 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 231 transitions. [2023-02-16 23:21:14,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.2580645161290325) internal successors, (101), 31 states have internal predecessors, (101), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-16 23:21:14,791 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 231 transitions. [2023-02-16 23:21:14,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2023-02-16 23:21:14,793 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:21:14,793 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 45, 45, 45, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:21:14,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-16 23:21:14,999 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,SelfDestructingSolverStorable11 [2023-02-16 23:21:14,999 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:21:15,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:21:15,000 INFO L85 PathProgramCache]: Analyzing trace with hash -512401555, now seen corresponding path program 10 times [2023-02-16 23:21:15,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:21:15,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981816095] [2023-02-16 23:21:15,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:21:15,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:21:15,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:21:15,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2023-02-16 23:21:15,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:21:15,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2023-02-16 23:21:15,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:21:15,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2023-02-16 23:21:15,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:21:15,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6916 backedges. 0 proven. 1748 refuted. 0 times theorem prover too weak. 5168 trivial. 0 not checked. [2023-02-16 23:21:15,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:21:15,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981816095] [2023-02-16 23:21:15,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981816095] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 23:21:15,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154893542] [2023-02-16 23:21:15,534 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-16 23:21:15,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:21:15,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:21:15,536 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 23:21:15,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-16 23:21:15,778 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-16 23:21:15,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 23:21:15,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 1170 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-16 23:21:15,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 23:21:15,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6916 backedges. 1418 proven. 330 refuted. 0 times theorem prover too weak. 5168 trivial. 0 not checked. [2023-02-16 23:21:15,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 23:21:16,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6916 backedges. 1418 proven. 330 refuted. 0 times theorem prover too weak. 5168 trivial. 0 not checked. [2023-02-16 23:21:16,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154893542] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 23:21:16,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 23:21:16,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 34 [2023-02-16 23:21:16,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519217044] [2023-02-16 23:21:16,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 23:21:16,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-16 23:21:16,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 23:21:16,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-16 23:21:16,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2023-02-16 23:21:16,215 INFO L87 Difference]: Start difference. First operand 212 states and 231 transitions. Second operand has 34 states, 34 states have (on average 3.6176470588235294) internal successors, (123), 34 states have internal predecessors, (123), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-16 23:21:16,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 23:21:16,284 INFO L93 Difference]: Finished difference Result 351 states and 424 transitions. [2023-02-16 23:21:16,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-16 23:21:16,284 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.6176470588235294) internal successors, (123), 34 states have internal predecessors, (123), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 311 [2023-02-16 23:21:16,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 23:21:16,285 INFO L225 Difference]: With dead ends: 351 [2023-02-16 23:21:16,285 INFO L226 Difference]: Without dead ends: 263 [2023-02-16 23:21:16,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 644 GetRequests, 597 SyntacticMatches, 15 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2023-02-16 23:21:16,286 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 97 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 23:21:16,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 154 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 23:21:16,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2023-02-16 23:21:16,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2023-02-16 23:21:16,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 258 states have (on average 1.1356589147286822) internal successors, (293), 258 states have internal predecessors, (293), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-16 23:21:16,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 299 transitions. [2023-02-16 23:21:16,292 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 299 transitions. Word has length 311 [2023-02-16 23:21:16,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 23:21:16,293 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 299 transitions. [2023-02-16 23:21:16,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.6176470588235294) internal successors, (123), 34 states have internal predecessors, (123), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-16 23:21:16,293 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 299 transitions. [2023-02-16 23:21:16,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2023-02-16 23:21:16,296 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 23:21:16,296 INFO L195 NwaCegarLoop]: trace histogram [96, 96, 96, 60, 60, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 23:21:16,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-16 23:21:16,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-16 23:21:16,504 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 23:21:16,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 23:21:16,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1295900265, now seen corresponding path program 11 times [2023-02-16 23:21:16,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 23:21:16,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735240230] [2023-02-16 23:21:16,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 23:21:16,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 23:21:16,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:21:17,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2023-02-16 23:21:17,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:21:18,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 226 [2023-02-16 23:21:18,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:21:18,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 359 [2023-02-16 23:21:18,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 23:21:18,062 INFO L134 CoverageAnalysis]: Checked inductivity of 17779 backedges. 0 proven. 7800 refuted. 0 times theorem prover too weak. 9979 trivial. 0 not checked. [2023-02-16 23:21:18,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 23:21:18,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735240230] [2023-02-16 23:21:18,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735240230] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 23:21:18,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654888064] [2023-02-16 23:21:18,063 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-16 23:21:18,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 23:21:18,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 23:21:18,064 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 23:21:18,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process