./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/in-de41.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 574ddb4e Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops-crafted-1/in-de41.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 71e52c2f7da6d5380080fb621ed04f7c322fd22e434b0426cf7577ab025ae680 --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 15:50:11,297 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 15:50:11,298 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 15:50:11,325 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 15:50:11,325 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 15:50:11,328 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 15:50:11,329 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 15:50:11,331 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 15:50:11,332 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 15:50:11,335 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 15:50:11,336 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 15:50:11,337 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 15:50:11,338 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 15:50:11,339 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 15:50:11,340 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 15:50:11,341 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 15:50:11,341 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 15:50:11,342 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 15:50:11,343 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 15:50:11,347 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 15:50:11,347 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 15:50:11,348 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 15:50:11,349 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 15:50:11,349 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 15:50:11,355 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 15:50:11,355 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 15:50:11,355 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 15:50:11,356 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 15:50:11,357 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 15:50:11,357 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 15:50:11,357 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 15:50:11,358 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 15:50:11,359 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 15:50:11,360 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 15:50:11,361 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 15:50:11,361 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 15:50:11,362 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 15:50:11,362 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 15:50:11,362 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 15:50:11,363 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 15:50:11,363 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 15:50:11,364 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 15:50:11,384 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 15:50:11,384 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 15:50:11,385 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 15:50:11,385 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 15:50:11,385 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 15:50:11,386 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 15:50:11,386 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 15:50:11,386 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 15:50:11,386 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 15:50:11,386 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 15:50:11,387 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 15:50:11,387 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 15:50:11,387 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 15:50:11,387 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 15:50:11,388 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 15:50:11,388 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 15:50:11,388 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 15:50:11,388 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 15:50:11,388 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 15:50:11,388 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 15:50:11,388 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 15:50:11,388 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 15:50:11,389 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 15:50:11,389 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 15:50:11,389 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 15:50:11,389 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 15:50:11,389 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 15:50:11,389 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 15:50:11,390 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 15:50:11,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 15:50:11,390 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 15:50:11,390 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 15:50:11,390 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 15:50:11,390 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 15:50:11,390 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 15:50:11,391 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 71e52c2f7da6d5380080fb621ed04f7c322fd22e434b0426cf7577ab025ae680 [2023-02-18 15:50:11,572 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 15:50:11,586 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 15:50:11,588 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 15:50:11,588 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 15:50:11,589 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 15:50:11,589 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/in-de41.c [2023-02-18 15:50:12,504 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 15:50:12,684 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 15:50:12,685 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de41.c [2023-02-18 15:50:12,688 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eadafd291/28d949b735ff497eb669ddd3dc44d123/FLAGa4b686459 [2023-02-18 15:50:12,696 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eadafd291/28d949b735ff497eb669ddd3dc44d123 [2023-02-18 15:50:12,698 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 15:50:12,699 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 15:50:12,700 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 15:50:12,700 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 15:50:12,702 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 15:50:12,702 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 03:50:12" (1/1) ... [2023-02-18 15:50:12,703 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@617d7fec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:50:12, skipping insertion in model container [2023-02-18 15:50:12,703 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 03:50:12" (1/1) ... [2023-02-18 15:50:12,707 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 15:50:12,716 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 15:50:12,791 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/loops-crafted-1/in-de41.c[368,381] [2023-02-18 15:50:12,802 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 15:50:12,809 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 15:50:12,817 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/loops-crafted-1/in-de41.c[368,381] [2023-02-18 15:50:12,823 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 15:50:12,831 INFO L208 MainTranslator]: Completed translation [2023-02-18 15:50:12,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:50:12 WrapperNode [2023-02-18 15:50:12,832 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 15:50:12,833 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 15:50:12,833 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 15:50:12,833 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 15:50:12,837 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:50:12" (1/1) ... [2023-02-18 15:50:12,841 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:50:12" (1/1) ... [2023-02-18 15:50:12,855 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2023-02-18 15:50:12,856 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 15:50:12,856 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 15:50:12,856 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 15:50:12,856 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 15:50:12,861 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:50:12" (1/1) ... [2023-02-18 15:50:12,862 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:50:12" (1/1) ... [2023-02-18 15:50:12,868 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:50:12" (1/1) ... [2023-02-18 15:50:12,868 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:50:12" (1/1) ... [2023-02-18 15:50:12,870 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:50:12" (1/1) ... [2023-02-18 15:50:12,874 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:50:12" (1/1) ... [2023-02-18 15:50:12,885 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:50:12" (1/1) ... [2023-02-18 15:50:12,885 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:50:12" (1/1) ... [2023-02-18 15:50:12,886 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 15:50:12,887 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 15:50:12,887 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 15:50:12,887 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 15:50:12,887 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:50:12" (1/1) ... [2023-02-18 15:50:12,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 15:50:12,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:50:12,915 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-18 15:50:12,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-18 15:50:12,943 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 15:50:12,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 15:50:12,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 15:50:12,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 15:50:12,990 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 15:50:12,991 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 15:50:13,130 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 15:50:13,140 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 15:50:13,140 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2023-02-18 15:50:13,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 03:50:13 BoogieIcfgContainer [2023-02-18 15:50:13,146 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 15:50:13,147 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 15:50:13,148 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 15:50:13,150 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 15:50:13,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 03:50:12" (1/3) ... [2023-02-18 15:50:13,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73a2b22d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 03:50:13, skipping insertion in model container [2023-02-18 15:50:13,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:50:12" (2/3) ... [2023-02-18 15:50:13,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73a2b22d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 03:50:13, skipping insertion in model container [2023-02-18 15:50:13,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 03:50:13" (3/3) ... [2023-02-18 15:50:13,167 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de41.c [2023-02-18 15:50:13,178 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 15:50:13,178 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 15:50:13,225 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 15:50:13,233 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;@64e1b642, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 15:50:13,233 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 15:50:13,236 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:13,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-18 15:50:13,242 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:50:13,243 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:50:13,244 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:50:13,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:50:13,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1522018600, now seen corresponding path program 1 times [2023-02-18 15:50:13,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:50:13,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464259376] [2023-02-18 15:50:13,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:50:13,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:50:13,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:50:13,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:50:13,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:50:13,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464259376] [2023-02-18 15:50:13,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464259376] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 15:50:13,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 15:50:13,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 15:50:13,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980624544] [2023-02-18 15:50:13,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 15:50:13,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 15:50:13,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:50:13,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 15:50:13,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 15:50:13,429 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:13,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:50:13,442 INFO L93 Difference]: Finished difference Result 27 states and 41 transitions. [2023-02-18 15:50:13,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 15:50:13,444 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-18 15:50:13,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:50:13,449 INFO L225 Difference]: With dead ends: 27 [2023-02-18 15:50:13,449 INFO L226 Difference]: Without dead ends: 11 [2023-02-18 15:50:13,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 15:50:13,455 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 15:50:13,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 15:50:13,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-02-18 15:50:13,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2023-02-18 15:50:13,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:13,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2023-02-18 15:50:13,480 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 10 [2023-02-18 15:50:13,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:50:13,481 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2023-02-18 15:50:13,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:13,482 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2023-02-18 15:50:13,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-18 15:50:13,482 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:50:13,482 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:50:13,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 15:50:13,483 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:50:13,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:50:13,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1522137764, now seen corresponding path program 1 times [2023-02-18 15:50:13,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:50:13,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281799794] [2023-02-18 15:50:13,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:50:13,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:50:13,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:50:13,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:50:13,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:50:13,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281799794] [2023-02-18 15:50:13,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281799794] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 15:50:13,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 15:50:13,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-18 15:50:13,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894709250] [2023-02-18 15:50:13,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 15:50:13,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 15:50:13,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:50:13,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 15:50:13,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-18 15:50:13,836 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:13,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:50:13,917 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2023-02-18 15:50:13,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 15:50:13,918 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-18 15:50:13,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:50:13,918 INFO L225 Difference]: With dead ends: 29 [2023-02-18 15:50:13,919 INFO L226 Difference]: Without dead ends: 17 [2023-02-18 15:50:13,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-02-18 15:50:13,920 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 11 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 15:50:13,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 22 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 15:50:13,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-02-18 15:50:13,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-02-18 15:50:13,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:13,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2023-02-18 15:50:13,925 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 10 [2023-02-18 15:50:13,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:50:13,925 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2023-02-18 15:50:13,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:13,926 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2023-02-18 15:50:13,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-18 15:50:13,926 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:50:13,926 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:50:13,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-18 15:50:13,927 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:50:13,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:50:13,927 INFO L85 PathProgramCache]: Analyzing trace with hash 923648321, now seen corresponding path program 1 times [2023-02-18 15:50:13,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:50:13,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965802333] [2023-02-18 15:50:13,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:50:13,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:50:13,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:50:13,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:50:13,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:50:13,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965802333] [2023-02-18 15:50:13,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965802333] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:50:13,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983476620] [2023-02-18 15:50:13,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:50:13,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:50:13,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:50:13,977 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 15:50:13,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 15:50:14,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:50:14,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-18 15:50:14,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:50:14,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:50:14,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:50:14,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:50:14,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983476620] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:50:14,068 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:50:14,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-02-18 15:50:14,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503332129] [2023-02-18 15:50:14,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:50:14,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 15:50:14,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:50:14,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 15:50:14,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-02-18 15:50:14,069 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:14,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:50:14,150 INFO L93 Difference]: Finished difference Result 65 states and 85 transitions. [2023-02-18 15:50:14,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 15:50:14,150 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-18 15:50:14,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:50:14,152 INFO L225 Difference]: With dead ends: 65 [2023-02-18 15:50:14,152 INFO L226 Difference]: Without dead ends: 59 [2023-02-18 15:50:14,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-02-18 15:50:14,153 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 47 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 15:50:14,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 62 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 15:50:14,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-02-18 15:50:14,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 29. [2023-02-18 15:50:14,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:14,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2023-02-18 15:50:14,160 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 11 [2023-02-18 15:50:14,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:50:14,160 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2023-02-18 15:50:14,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:14,161 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2023-02-18 15:50:14,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-18 15:50:14,161 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:50:14,161 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:50:14,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-18 15:50:14,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:50:14,368 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:50:14,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:50:14,369 INFO L85 PathProgramCache]: Analyzing trace with hash -491381764, now seen corresponding path program 1 times [2023-02-18 15:50:14,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:50:14,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559957547] [2023-02-18 15:50:14,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:50:14,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:50:14,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:50:14,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 15:50:14,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:50:14,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559957547] [2023-02-18 15:50:14,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559957547] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 15:50:14,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 15:50:14,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 15:50:14,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308793534] [2023-02-18 15:50:14,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 15:50:14,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 15:50:14,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:50:14,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 15:50:14,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 15:50:14,417 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:14,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:50:14,438 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2023-02-18 15:50:14,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 15:50:14,438 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-18 15:50:14,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:50:14,439 INFO L225 Difference]: With dead ends: 34 [2023-02-18 15:50:14,439 INFO L226 Difference]: Without dead ends: 24 [2023-02-18 15:50:14,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 15:50:14,440 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 15:50:14,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 27 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 15:50:14,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-02-18 15:50:14,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-02-18 15:50:14,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:14,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2023-02-18 15:50:14,448 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 12 [2023-02-18 15:50:14,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:50:14,449 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2023-02-18 15:50:14,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:14,449 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2023-02-18 15:50:14,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-18 15:50:14,450 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:50:14,451 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:50:14,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-18 15:50:14,451 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:50:14,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:50:14,451 INFO L85 PathProgramCache]: Analyzing trace with hash 607187538, now seen corresponding path program 1 times [2023-02-18 15:50:14,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:50:14,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638056661] [2023-02-18 15:50:14,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:50:14,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:50:14,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:50:14,522 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 15:50:14,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:50:14,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638056661] [2023-02-18 15:50:14,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638056661] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:50:14,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701447994] [2023-02-18 15:50:14,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:50:14,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:50:14,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:50:14,525 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 15:50:14,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 15:50:14,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:50:14,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-18 15:50:14,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:50:14,610 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 15:50:14,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:50:14,625 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 15:50:14,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701447994] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:50:14,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:50:14,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2023-02-18 15:50:14,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302089263] [2023-02-18 15:50:14,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:50:14,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 15:50:14,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:50:14,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 15:50:14,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 15:50:14,627 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:14,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:50:14,646 INFO L93 Difference]: Finished difference Result 39 states and 54 transitions. [2023-02-18 15:50:14,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 15:50:14,646 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-02-18 15:50:14,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:50:14,647 INFO L225 Difference]: With dead ends: 39 [2023-02-18 15:50:14,647 INFO L226 Difference]: Without dead ends: 35 [2023-02-18 15:50:14,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 15:50:14,647 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 15:50:14,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 28 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 15:50:14,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-02-18 15:50:14,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2023-02-18 15:50:14,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.4375) internal successors, (46), 32 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:14,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2023-02-18 15:50:14,665 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 13 [2023-02-18 15:50:14,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:50:14,665 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2023-02-18 15:50:14,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:14,665 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2023-02-18 15:50:14,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-18 15:50:14,666 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:50:14,666 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:50:14,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-18 15:50:14,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:50:14,869 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:50:14,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:50:14,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1644609900, now seen corresponding path program 1 times [2023-02-18 15:50:14,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:50:14,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33831207] [2023-02-18 15:50:14,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:50:14,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:50:14,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:50:15,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 15:50:15,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:50:15,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33831207] [2023-02-18 15:50:15,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33831207] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:50:15,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87202640] [2023-02-18 15:50:15,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:50:15,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:50:15,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:50:15,088 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 15:50:15,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 15:50:15,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:50:15,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-18 15:50:15,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:50:15,293 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:50:15,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:50:15,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:50:15,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87202640] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:50:15,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:50:15,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 16 [2023-02-18 15:50:15,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555659270] [2023-02-18 15:50:15,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:50:15,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-18 15:50:15,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:50:15,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-18 15:50:15,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-02-18 15:50:15,491 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:15,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:50:15,935 INFO L93 Difference]: Finished difference Result 71 states and 92 transitions. [2023-02-18 15:50:15,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-18 15:50:15,937 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-02-18 15:50:15,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:50:15,937 INFO L225 Difference]: With dead ends: 71 [2023-02-18 15:50:15,937 INFO L226 Difference]: Without dead ends: 65 [2023-02-18 15:50:15,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=200, Invalid=556, Unknown=0, NotChecked=0, Total=756 [2023-02-18 15:50:15,938 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 61 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 15:50:15,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 66 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 15:50:15,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-02-18 15:50:15,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 37. [2023-02-18 15:50:15,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.4722222222222223) internal successors, (53), 36 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:15,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 53 transitions. [2023-02-18 15:50:15,948 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 53 transitions. Word has length 14 [2023-02-18 15:50:15,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:50:15,949 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 53 transitions. [2023-02-18 15:50:15,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:15,949 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 53 transitions. [2023-02-18 15:50:15,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-18 15:50:15,949 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:50:15,949 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:50:15,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-18 15:50:16,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:50:16,150 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:50:16,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:50:16,150 INFO L85 PathProgramCache]: Analyzing trace with hash -2067097458, now seen corresponding path program 2 times [2023-02-18 15:50:16,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:50:16,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885821541] [2023-02-18 15:50:16,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:50:16,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:50:16,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:50:16,180 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 15:50:16,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:50:16,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885821541] [2023-02-18 15:50:16,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885821541] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:50:16,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565077558] [2023-02-18 15:50:16,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 15:50:16,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:50:16,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:50:16,182 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 15:50:16,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 15:50:16,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 15:50:16,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:50:16,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-18 15:50:16,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:50:16,229 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 15:50:16,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:50:16,258 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 15:50:16,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565077558] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:50:16,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:50:16,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-02-18 15:50:16,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524426644] [2023-02-18 15:50:16,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:50:16,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 15:50:16,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:50:16,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 15:50:16,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-02-18 15:50:16,262 INFO L87 Difference]: Start difference. First operand 37 states and 53 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:16,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:50:16,354 INFO L93 Difference]: Finished difference Result 74 states and 95 transitions. [2023-02-18 15:50:16,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-18 15:50:16,354 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-02-18 15:50:16,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:50:16,356 INFO L225 Difference]: With dead ends: 74 [2023-02-18 15:50:16,356 INFO L226 Difference]: Without dead ends: 63 [2023-02-18 15:50:16,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-02-18 15:50:16,357 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 54 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 15:50:16,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 70 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 15:50:16,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-02-18 15:50:16,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 34. [2023-02-18 15:50:16,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.393939393939394) internal successors, (46), 33 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:16,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 46 transitions. [2023-02-18 15:50:16,375 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 46 transitions. Word has length 14 [2023-02-18 15:50:16,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:50:16,375 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 46 transitions. [2023-02-18 15:50:16,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:16,375 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 46 transitions. [2023-02-18 15:50:16,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-18 15:50:16,376 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:50:16,376 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:50:16,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-18 15:50:16,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:50:16,576 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:50:16,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:50:16,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1219996004, now seen corresponding path program 2 times [2023-02-18 15:50:16,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:50:16,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622911353] [2023-02-18 15:50:16,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:50:16,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:50:16,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:50:16,617 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:50:16,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:50:16,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622911353] [2023-02-18 15:50:16,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622911353] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:50:16,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874827969] [2023-02-18 15:50:16,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 15:50:16,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:50:16,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:50:16,619 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 15:50:16,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 15:50:16,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 15:50:16,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:50:16,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-18 15:50:16,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:50:16,672 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:50:16,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:50:16,730 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:50:16,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874827969] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:50:16,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:50:16,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-02-18 15:50:16,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268703235] [2023-02-18 15:50:16,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:50:16,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-18 15:50:16,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:50:16,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-18 15:50:16,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-02-18 15:50:16,732 INFO L87 Difference]: Start difference. First operand 34 states and 46 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:17,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:50:17,140 INFO L93 Difference]: Finished difference Result 166 states and 229 transitions. [2023-02-18 15:50:17,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-18 15:50:17,141 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-02-18 15:50:17,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:50:17,142 INFO L225 Difference]: With dead ends: 166 [2023-02-18 15:50:17,142 INFO L226 Difference]: Without dead ends: 156 [2023-02-18 15:50:17,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=301, Invalid=691, Unknown=0, NotChecked=0, Total=992 [2023-02-18 15:50:17,143 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 303 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 15:50:17,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 182 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 15:50:17,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2023-02-18 15:50:17,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 60. [2023-02-18 15:50:17,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.4067796610169492) internal successors, (83), 59 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:17,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 83 transitions. [2023-02-18 15:50:17,153 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 83 transitions. Word has length 14 [2023-02-18 15:50:17,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:50:17,153 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 83 transitions. [2023-02-18 15:50:17,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:17,154 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 83 transitions. [2023-02-18 15:50:17,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-18 15:50:17,154 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:50:17,154 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:50:17,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-18 15:50:17,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:50:17,369 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:50:17,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:50:17,369 INFO L85 PathProgramCache]: Analyzing trace with hash -555035246, now seen corresponding path program 2 times [2023-02-18 15:50:17,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:50:17,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687202887] [2023-02-18 15:50:17,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:50:17,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:50:17,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:50:17,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 15:50:17,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:50:17,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687202887] [2023-02-18 15:50:17,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687202887] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:50:17,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484622248] [2023-02-18 15:50:17,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 15:50:17,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:50:17,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:50:17,416 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 15:50:17,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-18 15:50:17,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 15:50:17,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:50:17,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-18 15:50:17,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:50:17,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 15:50:17,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:50:17,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 15:50:17,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484622248] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:50:17,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:50:17,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2023-02-18 15:50:17,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353359179] [2023-02-18 15:50:17,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:50:17,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 15:50:17,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:50:17,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 15:50:17,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 15:50:17,482 INFO L87 Difference]: Start difference. First operand 60 states and 83 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:17,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:50:17,504 INFO L93 Difference]: Finished difference Result 70 states and 96 transitions. [2023-02-18 15:50:17,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 15:50:17,505 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-18 15:50:17,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:50:17,505 INFO L225 Difference]: With dead ends: 70 [2023-02-18 15:50:17,505 INFO L226 Difference]: Without dead ends: 58 [2023-02-18 15:50:17,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 7 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 15:50:17,507 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 7 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 15:50:17,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 29 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 15:50:17,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-02-18 15:50:17,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2023-02-18 15:50:17,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.4385964912280702) internal successors, (82), 57 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:17,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 82 transitions. [2023-02-18 15:50:17,523 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 82 transitions. Word has length 15 [2023-02-18 15:50:17,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:50:17,523 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 82 transitions. [2023-02-18 15:50:17,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:17,524 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 82 transitions. [2023-02-18 15:50:17,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-18 15:50:17,527 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:50:17,527 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:50:17,533 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-18 15:50:17,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:50:17,731 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:50:17,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:50:17,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1176713020, now seen corresponding path program 3 times [2023-02-18 15:50:17,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:50:17,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190126029] [2023-02-18 15:50:17,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:50:17,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:50:17,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:50:17,771 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 15:50:17,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:50:17,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190126029] [2023-02-18 15:50:17,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190126029] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:50:17,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630793426] [2023-02-18 15:50:17,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 15:50:17,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:50:17,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:50:17,773 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) [2023-02-18 15:50:17,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-18 15:50:17,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-18 15:50:17,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:50:17,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-18 15:50:17,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:50:17,818 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 15:50:17,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:50:17,856 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 15:50:17,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630793426] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:50:17,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:50:17,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-02-18 15:50:17,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240851905] [2023-02-18 15:50:17,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:50:17,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-18 15:50:17,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:50:17,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-18 15:50:17,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-02-18 15:50:17,857 INFO L87 Difference]: Start difference. First operand 58 states and 82 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:17,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:50:17,979 INFO L93 Difference]: Finished difference Result 109 states and 137 transitions. [2023-02-18 15:50:17,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-18 15:50:17,980 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-02-18 15:50:17,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:50:17,980 INFO L225 Difference]: With dead ends: 109 [2023-02-18 15:50:17,980 INFO L226 Difference]: Without dead ends: 93 [2023-02-18 15:50:17,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-02-18 15:50:17,981 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 38 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 15:50:17,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 112 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 15:50:17,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-02-18 15:50:17,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 56. [2023-02-18 15:50:17,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.4181818181818182) internal successors, (78), 55 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:17,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 78 transitions. [2023-02-18 15:50:17,989 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 78 transitions. Word has length 16 [2023-02-18 15:50:17,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:50:17,990 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 78 transitions. [2023-02-18 15:50:17,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:17,990 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 78 transitions. [2023-02-18 15:50:17,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-18 15:50:17,990 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:50:17,990 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:50:17,997 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-18 15:50:18,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:50:18,195 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:50:18,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:50:18,196 INFO L85 PathProgramCache]: Analyzing trace with hash 720326044, now seen corresponding path program 3 times [2023-02-18 15:50:18,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:50:18,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302492762] [2023-02-18 15:50:18,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:50:18,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:50:18,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:50:18,241 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 15:50:18,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:50:18,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302492762] [2023-02-18 15:50:18,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302492762] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:50:18,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286874231] [2023-02-18 15:50:18,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 15:50:18,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:50:18,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:50:18,243 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) [2023-02-18 15:50:18,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-18 15:50:18,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-18 15:50:18,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:50:18,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-18 15:50:18,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:50:18,296 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 15:50:18,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:50:18,322 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 15:50:18,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286874231] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:50:18,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:50:18,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2023-02-18 15:50:18,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512059238] [2023-02-18 15:50:18,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:50:18,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 15:50:18,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:50:18,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 15:50:18,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-02-18 15:50:18,325 INFO L87 Difference]: Start difference. First operand 56 states and 78 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:18,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:50:18,360 INFO L93 Difference]: Finished difference Result 77 states and 108 transitions. [2023-02-18 15:50:18,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 15:50:18,360 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-02-18 15:50:18,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:50:18,361 INFO L225 Difference]: With dead ends: 77 [2023-02-18 15:50:18,361 INFO L226 Difference]: Without dead ends: 73 [2023-02-18 15:50:18,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-02-18 15:50:18,362 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 27 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 15:50:18,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 48 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 15:50:18,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-02-18 15:50:18,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2023-02-18 15:50:18,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.4142857142857144) internal successors, (99), 70 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:18,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 99 transitions. [2023-02-18 15:50:18,375 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 99 transitions. Word has length 16 [2023-02-18 15:50:18,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:50:18,375 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 99 transitions. [2023-02-18 15:50:18,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:18,375 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 99 transitions. [2023-02-18 15:50:18,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-18 15:50:18,377 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:50:18,377 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:50:18,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-18 15:50:18,582 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,SelfDestructingSolverStorable10 [2023-02-18 15:50:18,582 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:50:18,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:50:18,583 INFO L85 PathProgramCache]: Analyzing trace with hash 796886620, now seen corresponding path program 4 times [2023-02-18 15:50:18,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:50:18,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614522169] [2023-02-18 15:50:18,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:50:18,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:50:18,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:50:18,768 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 15:50:18,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:50:18,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614522169] [2023-02-18 15:50:18,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614522169] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:50:18,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466796498] [2023-02-18 15:50:18,768 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 15:50:18,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:50:18,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:50:18,769 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) [2023-02-18 15:50:18,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-18 15:50:18,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 15:50:18,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:50:18,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-18 15:50:18,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:50:18,975 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 15:50:18,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:50:19,187 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 15:50:19,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466796498] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:50:19,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:50:19,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 25 [2023-02-18 15:50:19,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798859679] [2023-02-18 15:50:19,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:50:19,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-18 15:50:19,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:50:19,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-18 15:50:19,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2023-02-18 15:50:19,189 INFO L87 Difference]: Start difference. First operand 71 states and 99 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:19,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:50:19,865 INFO L93 Difference]: Finished difference Result 143 states and 177 transitions. [2023-02-18 15:50:19,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-18 15:50:19,874 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-02-18 15:50:19,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:50:19,874 INFO L225 Difference]: With dead ends: 143 [2023-02-18 15:50:19,874 INFO L226 Difference]: Without dead ends: 133 [2023-02-18 15:50:19,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=371, Invalid=1609, Unknown=0, NotChecked=0, Total=1980 [2023-02-18 15:50:19,876 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 72 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 15:50:19,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 137 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 15:50:19,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-02-18 15:50:19,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 91. [2023-02-18 15:50:19,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.3888888888888888) internal successors, (125), 90 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:19,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 125 transitions. [2023-02-18 15:50:19,890 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 125 transitions. Word has length 18 [2023-02-18 15:50:19,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:50:19,891 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 125 transitions. [2023-02-18 15:50:19,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:19,891 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 125 transitions. [2023-02-18 15:50:19,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-18 15:50:19,891 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:50:19,892 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:50:19,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-18 15:50:20,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:50:20,096 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:50:20,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:50:20,097 INFO L85 PathProgramCache]: Analyzing trace with hash -922594724, now seen corresponding path program 4 times [2023-02-18 15:50:20,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:50:20,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211250002] [2023-02-18 15:50:20,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:50:20,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:50:20,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:50:20,142 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 15:50:20,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:50:20,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211250002] [2023-02-18 15:50:20,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211250002] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:50:20,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529398991] [2023-02-18 15:50:20,142 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 15:50:20,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:50:20,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:50:20,144 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) [2023-02-18 15:50:20,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-18 15:50:20,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 15:50:20,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:50:20,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-18 15:50:20,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:50:20,194 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 15:50:20,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:50:20,245 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 15:50:20,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529398991] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:50:20,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:50:20,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-02-18 15:50:20,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708582627] [2023-02-18 15:50:20,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:50:20,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-18 15:50:20,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:50:20,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-18 15:50:20,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2023-02-18 15:50:20,247 INFO L87 Difference]: Start difference. First operand 91 states and 125 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:20,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:50:20,403 INFO L93 Difference]: Finished difference Result 141 states and 177 transitions. [2023-02-18 15:50:20,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-18 15:50:20,403 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-02-18 15:50:20,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:50:20,403 INFO L225 Difference]: With dead ends: 141 [2023-02-18 15:50:20,404 INFO L226 Difference]: Without dead ends: 125 [2023-02-18 15:50:20,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2023-02-18 15:50:20,404 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 73 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 15:50:20,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 107 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 15:50:20,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-02-18 15:50:20,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 80. [2023-02-18 15:50:20,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.3544303797468353) internal successors, (107), 79 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:20,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 107 transitions. [2023-02-18 15:50:20,417 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 107 transitions. Word has length 18 [2023-02-18 15:50:20,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:50:20,417 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 107 transitions. [2023-02-18 15:50:20,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:20,418 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 107 transitions. [2023-02-18 15:50:20,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-18 15:50:20,418 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:50:20,418 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:50:20,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-18 15:50:20,622 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,SelfDestructingSolverStorable12 [2023-02-18 15:50:20,623 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:50:20,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:50:20,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1064653150, now seen corresponding path program 5 times [2023-02-18 15:50:20,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:50:20,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655285] [2023-02-18 15:50:20,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:50:20,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:50:20,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:50:20,685 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 15:50:20,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:50:20,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655285] [2023-02-18 15:50:20,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655285] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:50:20,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722688245] [2023-02-18 15:50:20,686 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 15:50:20,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:50:20,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:50:20,687 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) [2023-02-18 15:50:20,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-18 15:50:20,722 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-02-18 15:50:20,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:50:20,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-18 15:50:20,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:50:20,743 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 15:50:20,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:50:20,763 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 15:50:20,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722688245] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:50:20,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:50:20,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2023-02-18 15:50:20,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975675344] [2023-02-18 15:50:20,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:50:20,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 15:50:20,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:50:20,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 15:50:20,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-18 15:50:20,765 INFO L87 Difference]: Start difference. First operand 80 states and 107 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:20,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:50:20,804 INFO L93 Difference]: Finished difference Result 103 states and 138 transitions. [2023-02-18 15:50:20,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 15:50:20,805 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-02-18 15:50:20,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:50:20,805 INFO L225 Difference]: With dead ends: 103 [2023-02-18 15:50:20,805 INFO L226 Difference]: Without dead ends: 88 [2023-02-18 15:50:20,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 11 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-18 15:50:20,806 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 16 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 15:50:20,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 50 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 15:50:20,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-02-18 15:50:20,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 71. [2023-02-18 15:50:20,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.3857142857142857) internal successors, (97), 70 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:20,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 97 transitions. [2023-02-18 15:50:20,817 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 97 transitions. Word has length 19 [2023-02-18 15:50:20,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:50:20,818 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 97 transitions. [2023-02-18 15:50:20,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:20,818 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 97 transitions. [2023-02-18 15:50:20,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-18 15:50:20,818 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:50:20,818 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:50:20,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-18 15:50:21,023 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,SelfDestructingSolverStorable13 [2023-02-18 15:50:21,023 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:50:21,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:50:21,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1610400402, now seen corresponding path program 5 times [2023-02-18 15:50:21,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:50:21,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648084388] [2023-02-18 15:50:21,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:50:21,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:50:21,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:50:21,082 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 15:50:21,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:50:21,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648084388] [2023-02-18 15:50:21,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648084388] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:50:21,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257211594] [2023-02-18 15:50:21,083 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 15:50:21,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:50:21,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:50:21,085 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) [2023-02-18 15:50:21,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-18 15:50:21,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-02-18 15:50:21,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:50:21,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-18 15:50:21,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:50:21,152 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 15:50:21,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:50:21,184 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 15:50:21,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257211594] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:50:21,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:50:21,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 11 [2023-02-18 15:50:21,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801773485] [2023-02-18 15:50:21,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:50:21,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-18 15:50:21,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:50:21,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-18 15:50:21,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-02-18 15:50:21,186 INFO L87 Difference]: Start difference. First operand 71 states and 97 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:21,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:50:21,247 INFO L93 Difference]: Finished difference Result 95 states and 132 transitions. [2023-02-18 15:50:21,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 15:50:21,248 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-02-18 15:50:21,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:50:21,248 INFO L225 Difference]: With dead ends: 95 [2023-02-18 15:50:21,249 INFO L226 Difference]: Without dead ends: 91 [2023-02-18 15:50:21,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 8 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-02-18 15:50:21,249 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 30 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 15:50:21,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 93 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 15:50:21,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-02-18 15:50:21,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2023-02-18 15:50:21,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.3793103448275863) internal successors, (120), 87 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:21,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 120 transitions. [2023-02-18 15:50:21,263 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 120 transitions. Word has length 19 [2023-02-18 15:50:21,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:50:21,263 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 120 transitions. [2023-02-18 15:50:21,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:21,264 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 120 transitions. [2023-02-18 15:50:21,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-18 15:50:21,264 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:50:21,264 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:50:21,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-18 15:50:21,468 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,SelfDestructingSolverStorable14 [2023-02-18 15:50:21,469 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:50:21,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:50:21,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1793951343, now seen corresponding path program 6 times [2023-02-18 15:50:21,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:50:21,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202490546] [2023-02-18 15:50:21,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:50:21,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:50:21,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:50:21,529 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 15:50:21,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:50:21,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202490546] [2023-02-18 15:50:21,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202490546] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:50:21,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293359075] [2023-02-18 15:50:21,530 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 15:50:21,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:50:21,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:50:21,531 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) [2023-02-18 15:50:21,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-18 15:50:21,566 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-18 15:50:21,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:50:21,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-18 15:50:21,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:50:21,597 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 15:50:21,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:50:21,669 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 15:50:21,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293359075] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:50:21,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:50:21,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 18 [2023-02-18 15:50:21,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613525299] [2023-02-18 15:50:21,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:50:21,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-18 15:50:21,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:50:21,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-18 15:50:21,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2023-02-18 15:50:21,670 INFO L87 Difference]: Start difference. First operand 88 states and 120 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:22,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:50:22,602 INFO L93 Difference]: Finished difference Result 339 states and 450 transitions. [2023-02-18 15:50:22,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-02-18 15:50:22,603 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-02-18 15:50:22,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:50:22,603 INFO L225 Difference]: With dead ends: 339 [2023-02-18 15:50:22,604 INFO L226 Difference]: Without dead ends: 311 [2023-02-18 15:50:22,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 9 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=428, Invalid=904, Unknown=0, NotChecked=0, Total=1332 [2023-02-18 15:50:22,605 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 291 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 15:50:22,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 310 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 15:50:22,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2023-02-18 15:50:22,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 111. [2023-02-18 15:50:22,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.3909090909090909) internal successors, (153), 110 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:22,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 153 transitions. [2023-02-18 15:50:22,632 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 153 transitions. Word has length 19 [2023-02-18 15:50:22,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:50:22,632 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 153 transitions. [2023-02-18 15:50:22,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:22,632 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 153 transitions. [2023-02-18 15:50:22,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-18 15:50:22,633 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:50:22,633 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:50:22,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-18 15:50:22,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-18 15:50:22,837 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:50:22,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:50:22,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1979130930, now seen corresponding path program 7 times [2023-02-18 15:50:22,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:50:22,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768791877] [2023-02-18 15:50:22,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:50:22,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:50:22,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:50:22,882 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-18 15:50:22,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:50:22,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768791877] [2023-02-18 15:50:22,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768791877] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:50:22,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446133182] [2023-02-18 15:50:22,883 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 15:50:22,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:50:22,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:50:22,884 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 15:50:22,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-18 15:50:22,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:50:22,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-18 15:50:22,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:50:22,941 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-18 15:50:22,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:50:22,988 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-18 15:50:22,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446133182] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:50:22,989 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:50:22,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2023-02-18 15:50:22,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470380724] [2023-02-18 15:50:22,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:50:22,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-18 15:50:22,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:50:22,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-18 15:50:22,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2023-02-18 15:50:22,989 INFO L87 Difference]: Start difference. First operand 111 states and 153 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:23,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:50:23,242 INFO L93 Difference]: Finished difference Result 198 states and 243 transitions. [2023-02-18 15:50:23,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-18 15:50:23,243 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-02-18 15:50:23,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:50:23,243 INFO L225 Difference]: With dead ends: 198 [2023-02-18 15:50:23,243 INFO L226 Difference]: Without dead ends: 172 [2023-02-18 15:50:23,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2023-02-18 15:50:23,244 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 65 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 15:50:23,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 236 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 15:50:23,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2023-02-18 15:50:23,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 105. [2023-02-18 15:50:23,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.3557692307692308) internal successors, (141), 104 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:23,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 141 transitions. [2023-02-18 15:50:23,263 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 141 transitions. Word has length 20 [2023-02-18 15:50:23,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:50:23,263 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 141 transitions. [2023-02-18 15:50:23,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:23,263 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 141 transitions. [2023-02-18 15:50:23,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-18 15:50:23,264 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:50:23,264 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:50:23,270 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-02-18 15:50:23,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:50:23,468 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:50:23,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:50:23,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1987539476, now seen corresponding path program 8 times [2023-02-18 15:50:23,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:50:23,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475074945] [2023-02-18 15:50:23,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:50:23,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:50:23,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:50:23,732 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 15:50:23,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:50:23,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475074945] [2023-02-18 15:50:23,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475074945] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:50:23,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340662390] [2023-02-18 15:50:23,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 15:50:23,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:50:23,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:50:23,733 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 15:50:23,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-18 15:50:23,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 15:50:23,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:50:23,808 WARN L261 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 52 conjunts are in the unsatisfiable core [2023-02-18 15:50:23,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:50:25,226 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:50:25,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:50:25,807 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:50:25,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340662390] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:50:25,807 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:50:25,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18, 18] total 41 [2023-02-18 15:50:25,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330806048] [2023-02-18 15:50:25,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:50:25,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-02-18 15:50:25,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:50:25,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-02-18 15:50:25,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=1299, Unknown=0, NotChecked=0, Total=1640 [2023-02-18 15:50:25,809 INFO L87 Difference]: Start difference. First operand 105 states and 141 transitions. Second operand has 41 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 41 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:29,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:50:29,395 INFO L93 Difference]: Finished difference Result 206 states and 257 transitions. [2023-02-18 15:50:29,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-02-18 15:50:29,395 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 41 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-02-18 15:50:29,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:50:29,396 INFO L225 Difference]: With dead ends: 206 [2023-02-18 15:50:29,396 INFO L226 Difference]: Without dead ends: 187 [2023-02-18 15:50:29,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2002 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1294, Invalid=5348, Unknown=0, NotChecked=0, Total=6642 [2023-02-18 15:50:29,398 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 253 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-18 15:50:29,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 170 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-18 15:50:29,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2023-02-18 15:50:29,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 127. [2023-02-18 15:50:29,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.3492063492063493) internal successors, (170), 126 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:29,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 170 transitions. [2023-02-18 15:50:29,426 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 170 transitions. Word has length 22 [2023-02-18 15:50:29,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:50:29,426 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 170 transitions. [2023-02-18 15:50:29,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 41 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:29,427 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 170 transitions. [2023-02-18 15:50:29,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-18 15:50:29,430 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:50:29,430 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:50:29,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-18 15:50:29,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-18 15:50:29,635 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:50:29,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:50:29,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1562904434, now seen corresponding path program 6 times [2023-02-18 15:50:29,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:50:29,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444755590] [2023-02-18 15:50:29,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:50:29,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:50:29,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:50:29,696 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-18 15:50:29,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:50:29,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444755590] [2023-02-18 15:50:29,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444755590] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:50:29,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093962826] [2023-02-18 15:50:29,697 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 15:50:29,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:50:29,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:50:29,698 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 15:50:29,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-18 15:50:29,734 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-18 15:50:29,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:50:29,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-18 15:50:29,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:50:29,772 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-18 15:50:29,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:50:29,855 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-18 15:50:29,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093962826] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:50:29,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:50:29,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2023-02-18 15:50:29,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942621289] [2023-02-18 15:50:29,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:50:29,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-18 15:50:29,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:50:29,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-18 15:50:29,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2023-02-18 15:50:29,856 INFO L87 Difference]: Start difference. First operand 127 states and 170 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:30,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:50:30,101 INFO L93 Difference]: Finished difference Result 172 states and 217 transitions. [2023-02-18 15:50:30,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-18 15:50:30,102 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-02-18 15:50:30,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:50:30,102 INFO L225 Difference]: With dead ends: 172 [2023-02-18 15:50:30,102 INFO L226 Difference]: Without dead ends: 147 [2023-02-18 15:50:30,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=166, Invalid=590, Unknown=0, NotChecked=0, Total=756 [2023-02-18 15:50:30,103 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 116 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 15:50:30,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 105 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 15:50:30,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-02-18 15:50:30,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 105. [2023-02-18 15:50:30,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.3461538461538463) internal successors, (140), 104 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:30,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 140 transitions. [2023-02-18 15:50:30,126 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 140 transitions. Word has length 22 [2023-02-18 15:50:30,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:50:30,126 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 140 transitions. [2023-02-18 15:50:30,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:30,126 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 140 transitions. [2023-02-18 15:50:30,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-18 15:50:30,126 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:50:30,126 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:50:30,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-18 15:50:30,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:50:30,327 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:50:30,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:50:30,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1894811100, now seen corresponding path program 7 times [2023-02-18 15:50:30,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:50:30,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395650972] [2023-02-18 15:50:30,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:50:30,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:50:30,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:50:30,418 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-18 15:50:30,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:50:30,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395650972] [2023-02-18 15:50:30,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395650972] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:50:30,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165316368] [2023-02-18 15:50:30,419 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 15:50:30,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:50:30,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:50:30,420 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 15:50:30,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-18 15:50:30,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:50:30,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-18 15:50:30,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:50:30,504 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-18 15:50:30,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:50:30,533 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-18 15:50:30,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165316368] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:50:30,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:50:30,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 14 [2023-02-18 15:50:30,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893930750] [2023-02-18 15:50:30,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:50:30,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 15:50:30,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:50:30,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 15:50:30,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-02-18 15:50:30,534 INFO L87 Difference]: Start difference. First operand 105 states and 140 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:30,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:50:30,633 INFO L93 Difference]: Finished difference Result 135 states and 184 transitions. [2023-02-18 15:50:30,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 15:50:30,634 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-02-18 15:50:30,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:50:30,634 INFO L225 Difference]: With dead ends: 135 [2023-02-18 15:50:30,634 INFO L226 Difference]: Without dead ends: 131 [2023-02-18 15:50:30,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 10 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-02-18 15:50:30,635 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 15:50:30,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 140 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 15:50:30,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-02-18 15:50:30,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 124. [2023-02-18 15:50:30,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.3495934959349594) internal successors, (166), 123 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:30,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 166 transitions. [2023-02-18 15:50:30,662 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 166 transitions. Word has length 22 [2023-02-18 15:50:30,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:50:30,662 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 166 transitions. [2023-02-18 15:50:30,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:30,662 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 166 transitions. [2023-02-18 15:50:30,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-18 15:50:30,662 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:50:30,663 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:50:30,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-18 15:50:30,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:50:30,863 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:50:30,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:50:30,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1912260034, now seen corresponding path program 8 times [2023-02-18 15:50:30,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:50:30,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570487765] [2023-02-18 15:50:30,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:50:30,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:50:30,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:50:30,935 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-18 15:50:30,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:50:30,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570487765] [2023-02-18 15:50:30,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570487765] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:50:30,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718178679] [2023-02-18 15:50:30,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 15:50:30,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:50:30,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:50:30,937 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 15:50:30,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-18 15:50:30,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 15:50:30,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:50:30,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-18 15:50:30,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:50:31,031 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-18 15:50:31,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:50:31,167 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-18 15:50:31,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718178679] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:50:31,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:50:31,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2023-02-18 15:50:31,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21789930] [2023-02-18 15:50:31,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:50:31,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-18 15:50:31,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:50:31,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-18 15:50:31,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2023-02-18 15:50:31,168 INFO L87 Difference]: Start difference. First operand 124 states and 166 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:31,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:50:31,830 INFO L93 Difference]: Finished difference Result 280 states and 337 transitions. [2023-02-18 15:50:31,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-02-18 15:50:31,830 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-02-18 15:50:31,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:50:31,831 INFO L225 Difference]: With dead ends: 280 [2023-02-18 15:50:31,831 INFO L226 Difference]: Without dead ends: 254 [2023-02-18 15:50:31,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=489, Invalid=1863, Unknown=0, NotChecked=0, Total=2352 [2023-02-18 15:50:31,832 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 144 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 15:50:31,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 218 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 15:50:31,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2023-02-18 15:50:31,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 139. [2023-02-18 15:50:31,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.318840579710145) internal successors, (182), 138 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:31,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 182 transitions. [2023-02-18 15:50:31,867 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 182 transitions. Word has length 23 [2023-02-18 15:50:31,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:50:31,868 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 182 transitions. [2023-02-18 15:50:31,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:31,868 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 182 transitions. [2023-02-18 15:50:31,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-18 15:50:31,868 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:50:31,868 INFO L195 NwaCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:50:31,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-18 15:50:32,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:50:32,069 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:50:32,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:50:32,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1236870529, now seen corresponding path program 3 times [2023-02-18 15:50:32,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:50:32,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326947566] [2023-02-18 15:50:32,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:50:32,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:50:32,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:50:32,188 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:50:32,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:50:32,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326947566] [2023-02-18 15:50:32,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326947566] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:50:32,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572461904] [2023-02-18 15:50:32,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 15:50:32,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:50:32,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:50:32,198 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 15:50:32,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-18 15:50:32,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-02-18 15:50:32,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:50:32,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-18 15:50:32,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:50:32,438 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:50:32,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:50:32,713 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:50:32,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572461904] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:50:32,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:50:32,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2023-02-18 15:50:32,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640787826] [2023-02-18 15:50:32,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:50:32,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-18 15:50:32,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:50:32,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-18 15:50:32,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=795, Unknown=0, NotChecked=0, Total=1056 [2023-02-18 15:50:32,715 INFO L87 Difference]: Start difference. First operand 139 states and 182 transitions. Second operand has 33 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:58,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:50:58,282 INFO L93 Difference]: Finished difference Result 848 states and 1135 transitions. [2023-02-18 15:50:58,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-02-18 15:50:58,282 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-02-18 15:50:58,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:50:58,284 INFO L225 Difference]: With dead ends: 848 [2023-02-18 15:50:58,284 INFO L226 Difference]: Without dead ends: 808 [2023-02-18 15:50:58,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 16 SyntacticMatches, 14 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1705 ImplicationChecksByTransitivity, 23.8s TimeCoverageRelationStatistics Valid=2101, Invalid=4705, Unknown=0, NotChecked=0, Total=6806 [2023-02-18 15:50:58,286 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 1608 mSDsluCounter, 1024 mSDsCounter, 0 mSdLazyCounter, 1380 mSolverCounterSat, 550 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1608 SdHoareTripleChecker+Valid, 1088 SdHoareTripleChecker+Invalid, 1930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 550 IncrementalHoareTripleChecker+Valid, 1380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-02-18 15:50:58,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1608 Valid, 1088 Invalid, 1930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [550 Valid, 1380 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-02-18 15:50:58,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2023-02-18 15:50:58,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 199. [2023-02-18 15:50:58,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.3686868686868687) internal successors, (271), 198 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:58,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 271 transitions. [2023-02-18 15:50:58,351 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 271 transitions. Word has length 23 [2023-02-18 15:50:58,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:50:58,352 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 271 transitions. [2023-02-18 15:50:58,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:58,352 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 271 transitions. [2023-02-18 15:50:58,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-18 15:50:58,352 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:50:58,352 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:50:58,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-02-18 15:50:58,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:50:58,557 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:50:58,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:50:58,557 INFO L85 PathProgramCache]: Analyzing trace with hash -510369070, now seen corresponding path program 9 times [2023-02-18 15:50:58,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:50:58,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692049793] [2023-02-18 15:50:58,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:50:58,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:50:58,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:50:58,691 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 15:50:58,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:50:58,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692049793] [2023-02-18 15:50:58,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692049793] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:50:58,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609540090] [2023-02-18 15:50:58,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 15:50:58,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:50:58,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:50:58,693 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 15:50:58,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-18 15:50:58,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-18 15:50:58,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:50:58,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-18 15:50:58,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:50:58,835 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-18 15:50:58,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:50:58,887 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-18 15:50:58,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609540090] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:50:58,888 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:50:58,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 23 [2023-02-18 15:50:58,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382242749] [2023-02-18 15:50:58,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:50:58,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-18 15:50:58,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:50:58,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-18 15:50:58,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2023-02-18 15:50:58,889 INFO L87 Difference]: Start difference. First operand 199 states and 271 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:59,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:50:59,816 INFO L93 Difference]: Finished difference Result 459 states and 653 transitions. [2023-02-18 15:50:59,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-18 15:50:59,816 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-02-18 15:50:59,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:50:59,817 INFO L225 Difference]: With dead ends: 459 [2023-02-18 15:50:59,818 INFO L226 Difference]: Without dead ends: 454 [2023-02-18 15:50:59,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=433, Invalid=973, Unknown=0, NotChecked=0, Total=1406 [2023-02-18 15:50:59,818 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 91 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 15:50:59,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 235 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 15:50:59,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2023-02-18 15:50:59,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 322. [2023-02-18 15:50:59,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 1.4797507788161994) internal successors, (475), 321 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:59,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 475 transitions. [2023-02-18 15:50:59,924 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 475 transitions. Word has length 25 [2023-02-18 15:50:59,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:50:59,924 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 475 transitions. [2023-02-18 15:50:59,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:50:59,924 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 475 transitions. [2023-02-18 15:50:59,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-18 15:50:59,925 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:50:59,925 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:50:59,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-18 15:51:00,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-02-18 15:51:00,127 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:51:00,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:51:00,128 INFO L85 PathProgramCache]: Analyzing trace with hash -955275428, now seen corresponding path program 9 times [2023-02-18 15:51:00,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:51:00,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723751431] [2023-02-18 15:51:00,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:51:00,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:51:00,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:51:00,461 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-18 15:51:00,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:51:00,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723751431] [2023-02-18 15:51:00,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723751431] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:51:00,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008309279] [2023-02-18 15:51:00,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 15:51:00,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:51:00,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:51:00,463 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 15:51:00,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-18 15:51:00,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-18 15:51:00,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:51:00,557 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 62 conjunts are in the unsatisfiable core [2023-02-18 15:51:00,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:51:00,951 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:51:00,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:51:01,401 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:51:01,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008309279] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:51:01,402 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:51:01,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21, 16] total 45 [2023-02-18 15:51:01,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074743074] [2023-02-18 15:51:01,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:51:01,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-02-18 15:51:01,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:51:01,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-02-18 15:51:01,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=342, Invalid=1638, Unknown=0, NotChecked=0, Total=1980 [2023-02-18 15:51:01,403 INFO L87 Difference]: Start difference. First operand 322 states and 475 transitions. Second operand has 45 states, 45 states have (on average 1.5333333333333334) internal successors, (69), 45 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:51:03,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:51:03,245 INFO L93 Difference]: Finished difference Result 456 states and 608 transitions. [2023-02-18 15:51:03,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-02-18 15:51:03,245 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.5333333333333334) internal successors, (69), 45 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-02-18 15:51:03,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:51:03,247 INFO L225 Difference]: With dead ends: 456 [2023-02-18 15:51:03,247 INFO L226 Difference]: Without dead ends: 436 [2023-02-18 15:51:03,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=786, Invalid=3636, Unknown=0, NotChecked=0, Total=4422 [2023-02-18 15:51:03,248 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 128 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-18 15:51:03,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 99 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-18 15:51:03,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2023-02-18 15:51:03,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 316. [2023-02-18 15:51:03,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 1.4857142857142858) internal successors, (468), 315 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:51:03,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 468 transitions. [2023-02-18 15:51:03,356 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 468 transitions. Word has length 26 [2023-02-18 15:51:03,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:51:03,356 INFO L495 AbstractCegarLoop]: Abstraction has 316 states and 468 transitions. [2023-02-18 15:51:03,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.5333333333333334) internal successors, (69), 45 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:51:03,356 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 468 transitions. [2023-02-18 15:51:03,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-18 15:51:03,357 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:51:03,357 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:51:03,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-18 15:51:03,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-02-18 15:51:03,562 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:51:03,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:51:03,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1118982868, now seen corresponding path program 10 times [2023-02-18 15:51:03,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:51:03,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576359981] [2023-02-18 15:51:03,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:51:03,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:51:03,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:51:03,642 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-18 15:51:03,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:51:03,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576359981] [2023-02-18 15:51:03,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576359981] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:51:03,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429311752] [2023-02-18 15:51:03,642 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 15:51:03,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:51:03,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:51:03,644 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 15:51:03,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-18 15:51:03,676 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 15:51:03,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:51:03,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-18 15:51:03,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:51:03,727 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-18 15:51:03,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:51:03,829 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-18 15:51:03,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429311752] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:51:03,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:51:03,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 24 [2023-02-18 15:51:03,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404412738] [2023-02-18 15:51:03,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:51:03,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-18 15:51:03,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:51:03,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-18 15:51:03,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2023-02-18 15:51:03,830 INFO L87 Difference]: Start difference. First operand 316 states and 468 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:51:04,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:51:04,482 INFO L93 Difference]: Finished difference Result 517 states and 669 transitions. [2023-02-18 15:51:04,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-02-18 15:51:04,483 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-02-18 15:51:04,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:51:04,490 INFO L225 Difference]: With dead ends: 517 [2023-02-18 15:51:04,490 INFO L226 Difference]: Without dead ends: 446 [2023-02-18 15:51:04,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 34 SyntacticMatches, 7 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=180, Invalid=942, Unknown=0, NotChecked=0, Total=1122 [2023-02-18 15:51:04,491 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 99 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 15:51:04,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 523 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 15:51:04,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2023-02-18 15:51:04,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 299. [2023-02-18 15:51:04,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 1.4630872483221478) internal successors, (436), 298 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:51:04,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 436 transitions. [2023-02-18 15:51:04,594 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 436 transitions. Word has length 26 [2023-02-18 15:51:04,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:51:04,594 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 436 transitions. [2023-02-18 15:51:04,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:51:04,594 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 436 transitions. [2023-02-18 15:51:04,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-18 15:51:04,595 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:51:04,595 INFO L195 NwaCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:51:04,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-18 15:51:04,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:51:04,799 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:51:04,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:51:04,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1509115665, now seen corresponding path program 11 times [2023-02-18 15:51:04,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:51:04,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458806374] [2023-02-18 15:51:04,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:51:04,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:51:04,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:51:04,969 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 15:51:04,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:51:04,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458806374] [2023-02-18 15:51:04,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458806374] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:51:04,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774982] [2023-02-18 15:51:04,969 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 15:51:04,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:51:04,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:51:04,970 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 15:51:04,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-18 15:51:05,306 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-02-18 15:51:05,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:51:05,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-18 15:51:05,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:51:05,423 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 15:51:05,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:51:05,769 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 15:51:05,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774982] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:51:05,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:51:05,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2023-02-18 15:51:05,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264715258] [2023-02-18 15:51:05,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:51:05,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-02-18 15:51:05,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:51:05,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-02-18 15:51:05,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=1030, Unknown=0, NotChecked=0, Total=1332 [2023-02-18 15:51:05,771 INFO L87 Difference]: Start difference. First operand 299 states and 436 transitions. Second operand has 37 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:52:48,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:52:48,836 INFO L93 Difference]: Finished difference Result 1275 states and 1693 transitions. [2023-02-18 15:52:48,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2023-02-18 15:52:48,837 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-18 15:52:48,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:52:48,839 INFO L225 Difference]: With dead ends: 1275 [2023-02-18 15:52:48,839 INFO L226 Difference]: Without dead ends: 1240 [2023-02-18 15:52:48,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 21 SyntacticMatches, 16 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9195 ImplicationChecksByTransitivity, 96.7s TimeCoverageRelationStatistics Valid=6620, Invalid=17560, Unknown=0, NotChecked=0, Total=24180 [2023-02-18 15:52:48,844 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 2150 mSDsluCounter, 1164 mSDsCounter, 0 mSdLazyCounter, 1547 mSolverCounterSat, 845 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2150 SdHoareTripleChecker+Valid, 1243 SdHoareTripleChecker+Invalid, 2392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 845 IncrementalHoareTripleChecker+Valid, 1547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2023-02-18 15:52:48,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2150 Valid, 1243 Invalid, 2392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [845 Valid, 1547 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2023-02-18 15:52:48,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2023-02-18 15:52:48,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 322. [2023-02-18 15:52:48,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 1.4641744548286604) internal successors, (470), 321 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:52:48,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 470 transitions. [2023-02-18 15:52:48,971 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 470 transitions. Word has length 27 [2023-02-18 15:52:48,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:52:48,971 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 470 transitions. [2023-02-18 15:52:48,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:52:48,971 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 470 transitions. [2023-02-18 15:52:48,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-18 15:52:48,972 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:52:48,972 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:52:48,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-02-18 15:52:49,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:52:49,172 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:52:49,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:52:49,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1507034516, now seen corresponding path program 12 times [2023-02-18 15:52:49,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:52:49,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328438564] [2023-02-18 15:52:49,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:52:49,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:52:49,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:52:49,600 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 15:52:49,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:52:49,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328438564] [2023-02-18 15:52:49,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328438564] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:52:49,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101093467] [2023-02-18 15:52:49,601 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 15:52:49,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:52:49,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:52:49,605 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 15:52:49,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-18 15:52:49,724 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-18 15:52:49,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:52:49,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 53 conjunts are in the unsatisfiable core [2023-02-18 15:52:49,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:52:50,063 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 15:52:50,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:52:50,501 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 15:52:50,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101093467] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:52:50,501 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:52:50,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 40 [2023-02-18 15:52:50,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599010737] [2023-02-18 15:52:50,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:52:50,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-02-18 15:52:50,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:52:50,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-02-18 15:52:50,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1366, Unknown=0, NotChecked=0, Total=1560 [2023-02-18 15:52:50,503 INFO L87 Difference]: Start difference. First operand 322 states and 470 transitions. Second operand has 40 states, 40 states have (on average 1.8) internal successors, (72), 40 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:52:54,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:52:54,962 INFO L93 Difference]: Finished difference Result 526 states and 674 transitions. [2023-02-18 15:52:54,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-02-18 15:52:54,963 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.8) internal successors, (72), 40 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-02-18 15:52:54,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:52:54,964 INFO L225 Difference]: With dead ends: 526 [2023-02-18 15:52:54,964 INFO L226 Difference]: Without dead ends: 510 [2023-02-18 15:52:54,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 33 SyntacticMatches, 7 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=596, Invalid=3960, Unknown=0, NotChecked=0, Total=4556 [2023-02-18 15:52:54,965 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 111 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-18 15:52:54,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 289 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-18 15:52:54,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2023-02-18 15:52:55,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 340. [2023-02-18 15:52:55,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 1.4513274336283186) internal successors, (492), 339 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:52:55,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 492 transitions. [2023-02-18 15:52:55,111 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 492 transitions. Word has length 30 [2023-02-18 15:52:55,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:52:55,111 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 492 transitions. [2023-02-18 15:52:55,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.8) internal successors, (72), 40 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:52:55,111 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 492 transitions. [2023-02-18 15:52:55,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-18 15:52:55,112 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:52:55,112 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:52:55,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-02-18 15:52:55,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-02-18 15:52:55,312 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:52:55,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:52:55,313 INFO L85 PathProgramCache]: Analyzing trace with hash 52816604, now seen corresponding path program 13 times [2023-02-18 15:52:55,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:52:55,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205609713] [2023-02-18 15:52:55,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:52:55,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:52:55,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:52:55,430 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-02-18 15:52:55,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:52:55,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205609713] [2023-02-18 15:52:55,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205609713] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:52:55,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278178179] [2023-02-18 15:52:55,430 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 15:52:55,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:52:55,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:52:55,431 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 15:52:55,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-02-18 15:52:55,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:52:55,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-18 15:52:55,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:52:55,538 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-02-18 15:52:55,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:52:55,679 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-18 15:52:55,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278178179] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:52:55,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:52:55,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 29 [2023-02-18 15:52:55,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219174431] [2023-02-18 15:52:55,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:52:55,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-18 15:52:55,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:52:55,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-18 15:52:55,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2023-02-18 15:52:55,681 INFO L87 Difference]: Start difference. First operand 340 states and 492 transitions. Second operand has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:52:56,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:52:56,907 INFO L93 Difference]: Finished difference Result 555 states and 708 transitions. [2023-02-18 15:52:56,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-02-18 15:52:56,908 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-02-18 15:52:56,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:52:56,909 INFO L225 Difference]: With dead ends: 555 [2023-02-18 15:52:56,909 INFO L226 Difference]: Without dead ends: 474 [2023-02-18 15:52:56,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 38 SyntacticMatches, 8 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=327, Invalid=2123, Unknown=0, NotChecked=0, Total=2450 [2023-02-18 15:52:56,910 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 177 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-18 15:52:56,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 604 Invalid, 895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-18 15:52:56,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2023-02-18 15:52:57,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 324. [2023-02-18 15:52:57,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 1.4272445820433437) internal successors, (461), 323 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:52:57,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 461 transitions. [2023-02-18 15:52:57,036 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 461 transitions. Word has length 30 [2023-02-18 15:52:57,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:52:57,036 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 461 transitions. [2023-02-18 15:52:57,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:52:57,036 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 461 transitions. [2023-02-18 15:52:57,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-18 15:52:57,037 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:52:57,037 INFO L195 NwaCegarLoop]: trace histogram [15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:52:57,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-02-18 15:52:57,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-02-18 15:52:57,237 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:52:57,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:52:57,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1397313151, now seen corresponding path program 14 times [2023-02-18 15:52:57,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:52:57,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702647332] [2023-02-18 15:52:57,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:52:57,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:52:57,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:52:57,442 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 15:52:57,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:52:57,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702647332] [2023-02-18 15:52:57,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702647332] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:52:57,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777026645] [2023-02-18 15:52:57,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 15:52:57,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:52:57,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:52:57,443 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 15:52:57,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-02-18 15:52:57,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 15:52:57,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:52:57,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 39 conjunts are in the unsatisfiable core [2023-02-18 15:52:57,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:52:57,606 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 15:52:57,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:52:58,030 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 15:52:58,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777026645] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:52:58,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:52:58,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 41 [2023-02-18 15:52:58,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71442003] [2023-02-18 15:52:58,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:52:58,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-02-18 15:52:58,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:52:58,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-02-18 15:52:58,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=1293, Unknown=0, NotChecked=0, Total=1640 [2023-02-18 15:52:58,032 INFO L87 Difference]: Start difference. First operand 324 states and 461 transitions. Second operand has 41 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 41 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:55:49,059 WARN L837 $PredicateComparison]: unable to prove that (and (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 8) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967295) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 7) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 9) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 12) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 5) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 6) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 1) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 10) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 11) 4294967296) 0) (> (mod |c_ULTIMATE.start_main_~y~0#1| 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 3) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967294) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 2) 4294967296) 0)) is different from false [2023-02-18 15:57:31,850 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 15:57:41,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:41,878 INFO L93 Difference]: Finished difference Result 1328 states and 1722 transitions. [2023-02-18 15:57:41,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 207 states. [2023-02-18 15:57:41,878 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 41 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-02-18 15:57:41,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:41,881 INFO L225 Difference]: With dead ends: 1328 [2023-02-18 15:57:41,881 INFO L226 Difference]: Without dead ends: 1284 [2023-02-18 15:57:41,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 25 SyntacticMatches, 18 SemanticMatches, 226 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 20884 ImplicationChecksByTransitivity, 268.3s TimeCoverageRelationStatistics Valid=12255, Invalid=39041, Unknown=10, NotChecked=450, Total=51756 [2023-02-18 15:57:41,884 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 2740 mSDsluCounter, 1706 mSDsCounter, 0 mSdLazyCounter, 2254 mSolverCounterSat, 952 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2740 SdHoareTripleChecker+Valid, 1796 SdHoareTripleChecker+Invalid, 3207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 952 IncrementalHoareTripleChecker+Valid, 2254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 15.6s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:41,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2740 Valid, 1796 Invalid, 3207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [952 Valid, 2254 Invalid, 0 Unknown, 1 Unchecked, 15.6s Time] [2023-02-18 15:57:41,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2023-02-18 15:57:42,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 346. [2023-02-18 15:57:42,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 1.4289855072463769) internal successors, (493), 345 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:57:42,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 493 transitions. [2023-02-18 15:57:42,043 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 493 transitions. Word has length 31 [2023-02-18 15:57:42,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:42,043 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 493 transitions. [2023-02-18 15:57:42,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 41 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:57:42,043 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 493 transitions. [2023-02-18 15:57:42,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-18 15:57:42,044 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:42,044 INFO L195 NwaCegarLoop]: trace histogram [12, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:42,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-02-18 15:57:42,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-02-18 15:57:42,244 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:42,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:42,244 INFO L85 PathProgramCache]: Analyzing trace with hash 2001387790, now seen corresponding path program 10 times [2023-02-18 15:57:42,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:42,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906368819] [2023-02-18 15:57:42,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:42,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:42,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:42,345 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-18 15:57:42,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:42,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906368819] [2023-02-18 15:57:42,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906368819] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:57:42,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038742522] [2023-02-18 15:57:42,346 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 15:57:42,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:42,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:57:42,347 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 15:57:42,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-02-18 15:57:42,387 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 15:57:42,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:57:42,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-18 15:57:42,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:57:42,475 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-18 15:57:42,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:57:42,686 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-18 15:57:42,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038742522] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:57:42,687 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:57:42,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2023-02-18 15:57:42,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144060785] [2023-02-18 15:57:42,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:57:42,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-18 15:57:42,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:42,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-18 15:57:42,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2023-02-18 15:57:42,688 INFO L87 Difference]: Start difference. First operand 346 states and 493 transitions. Second operand has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:57:43,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:43,737 INFO L93 Difference]: Finished difference Result 540 states and 690 transitions. [2023-02-18 15:57:43,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-02-18 15:57:43,738 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-02-18 15:57:43,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:43,739 INFO L225 Difference]: With dead ends: 540 [2023-02-18 15:57:43,739 INFO L226 Difference]: Without dead ends: 497 [2023-02-18 15:57:43,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 45 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=446, Invalid=1716, Unknown=0, NotChecked=0, Total=2162 [2023-02-18 15:57:43,740 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 263 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:43,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 188 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 15:57:43,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2023-02-18 15:57:43,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 317. [2023-02-18 15:57:43,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 1.4335443037974684) internal successors, (453), 316 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:57:43,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 453 transitions. [2023-02-18 15:57:43,894 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 453 transitions. Word has length 32 [2023-02-18 15:57:43,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:43,894 INFO L495 AbstractCegarLoop]: Abstraction has 317 states and 453 transitions. [2023-02-18 15:57:43,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:57:43,894 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 453 transitions. [2023-02-18 15:57:43,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-18 15:57:43,895 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:43,895 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:43,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-02-18 15:57:44,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:44,100 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:44,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:44,100 INFO L85 PathProgramCache]: Analyzing trace with hash 240430434, now seen corresponding path program 15 times [2023-02-18 15:57:44,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:44,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010804816] [2023-02-18 15:57:44,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:44,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:44,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:44,215 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-18 15:57:44,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:44,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010804816] [2023-02-18 15:57:44,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010804816] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:57:44,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568250105] [2023-02-18 15:57:44,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 15:57:44,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:44,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:57:44,217 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 15:57:44,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-02-18 15:57:44,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-18 15:57:44,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:57:44,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-18 15:57:44,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:57:44,353 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-18 15:57:44,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:57:44,414 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-18 15:57:44,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568250105] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:57:44,415 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:57:44,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 9 [2023-02-18 15:57:44,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543448128] [2023-02-18 15:57:44,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:57:44,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 15:57:44,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:44,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 15:57:44,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-02-18 15:57:44,416 INFO L87 Difference]: Start difference. First operand 317 states and 453 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:57:44,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:44,916 INFO L93 Difference]: Finished difference Result 367 states and 506 transitions. [2023-02-18 15:57:44,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-18 15:57:44,916 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-02-18 15:57:44,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:44,917 INFO L225 Difference]: With dead ends: 367 [2023-02-18 15:57:44,917 INFO L226 Difference]: Without dead ends: 363 [2023-02-18 15:57:44,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 46 SyntacticMatches, 25 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=586, Unknown=0, NotChecked=0, Total=756 [2023-02-18 15:57:44,918 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 45 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:44,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 114 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 15:57:44,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2023-02-18 15:57:45,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 342. [2023-02-18 15:57:45,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 1.4076246334310851) internal successors, (480), 341 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:57:45,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 480 transitions. [2023-02-18 15:57:45,093 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 480 transitions. Word has length 33 [2023-02-18 15:57:45,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:45,093 INFO L495 AbstractCegarLoop]: Abstraction has 342 states and 480 transitions. [2023-02-18 15:57:45,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:57:45,093 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 480 transitions. [2023-02-18 15:57:45,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-18 15:57:45,094 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:45,094 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:45,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-02-18 15:57:45,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:45,298 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:45,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:45,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1134925732, now seen corresponding path program 16 times [2023-02-18 15:57:45,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:45,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156256299] [2023-02-18 15:57:45,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:45,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:45,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:45,784 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-18 15:57:45,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:45,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156256299] [2023-02-18 15:57:45,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156256299] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:57:45,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283135542] [2023-02-18 15:57:45,784 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 15:57:45,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:45,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:57:45,785 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 15:57:45,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-02-18 15:57:45,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 15:57:45,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:57:45,965 WARN L261 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 88 conjunts are in the unsatisfiable core [2023-02-18 15:57:45,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:57:58,094 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:57:58,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:57:59,713 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:57:59,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283135542] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:57:59,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:57:59,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 29, 22] total 61 [2023-02-18 15:57:59,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271322636] [2023-02-18 15:57:59,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:57:59,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-02-18 15:57:59,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:59,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-02-18 15:57:59,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=590, Invalid=3066, Unknown=4, NotChecked=0, Total=3660 [2023-02-18 15:57:59,715 INFO L87 Difference]: Start difference. First operand 342 states and 480 transitions. Second operand has 61 states, 61 states have (on average 1.459016393442623) internal successors, (89), 61 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:58:09,956 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-02-18 15:58:28,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-02-18 15:58:34,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:58:34,236 INFO L93 Difference]: Finished difference Result 618 states and 766 transitions. [2023-02-18 15:58:34,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2023-02-18 15:58:34,236 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.459016393442623) internal successors, (89), 61 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-02-18 15:58:34,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:58:34,238 INFO L225 Difference]: With dead ends: 618 [2023-02-18 15:58:34,238 INFO L226 Difference]: Without dead ends: 595 [2023-02-18 15:58:34,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 22 SyntacticMatches, 8 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7037 ImplicationChecksByTransitivity, 39.1s TimeCoverageRelationStatistics Valid=3019, Invalid=18730, Unknown=7, NotChecked=0, Total=21756 [2023-02-18 15:58:34,239 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 316 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 1302 mSolverCounterSat, 378 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 1683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 378 IncrementalHoareTripleChecker+Valid, 1302 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2023-02-18 15:58:34,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 245 Invalid, 1683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [378 Valid, 1302 Invalid, 3 Unknown, 0 Unchecked, 8.5s Time] [2023-02-18 15:58:34,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2023-02-18 15:58:34,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 363. [2023-02-18 15:58:34,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 1.3977900552486189) internal successors, (506), 362 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:58:34,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 506 transitions. [2023-02-18 15:58:34,451 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 506 transitions. Word has length 34 [2023-02-18 15:58:34,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:58:34,451 INFO L495 AbstractCegarLoop]: Abstraction has 363 states and 506 transitions. [2023-02-18 15:58:34,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.459016393442623) internal successors, (89), 61 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:58:34,452 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 506 transitions. [2023-02-18 15:58:34,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-18 15:58:34,452 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:58:34,452 INFO L195 NwaCegarLoop]: trace histogram [12, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:58:34,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-02-18 15:58:34,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:58:34,657 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:58:34,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:58:34,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1676934236, now seen corresponding path program 11 times [2023-02-18 15:58:34,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:58:34,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615442538] [2023-02-18 15:58:34,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:58:34,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:58:34,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:58:34,785 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-18 15:58:34,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:58:34,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615442538] [2023-02-18 15:58:34,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615442538] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:58:34,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605275025] [2023-02-18 15:58:34,786 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 15:58:34,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:58:34,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:58:34,787 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 15:58:34,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-02-18 15:58:35,184 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-02-18 15:58:35,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:58:35,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-18 15:58:35,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:58:35,303 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-18 15:58:35,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:58:35,557 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-18 15:58:35,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605275025] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:58:35,557 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:58:35,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2023-02-18 15:58:35,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806510705] [2023-02-18 15:58:35,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:58:35,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-02-18 15:58:35,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:58:35,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-02-18 15:58:35,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1100, Unknown=0, NotChecked=0, Total=1332 [2023-02-18 15:58:35,558 INFO L87 Difference]: Start difference. First operand 363 states and 506 transitions. Second operand has 37 states, 37 states have (on average 1.4324324324324325) internal successors, (53), 37 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:58:37,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:58:37,447 INFO L93 Difference]: Finished difference Result 646 states and 794 transitions. [2023-02-18 15:58:37,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-02-18 15:58:37,448 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.4324324324324325) internal successors, (53), 37 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-02-18 15:58:37,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:58:37,449 INFO L225 Difference]: With dead ends: 646 [2023-02-18 15:58:37,449 INFO L226 Difference]: Without dead ends: 594 [2023-02-18 15:58:37,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 46 SyntacticMatches, 7 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=673, Invalid=2633, Unknown=0, NotChecked=0, Total=3306 [2023-02-18 15:58:37,450 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 196 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 15:58:37,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 238 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 15:58:37,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2023-02-18 15:58:37,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 333. [2023-02-18 15:58:37,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 1.4066265060240963) internal successors, (467), 332 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:58:37,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 467 transitions. [2023-02-18 15:58:37,645 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 467 transitions. Word has length 34 [2023-02-18 15:58:37,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:58:37,646 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 467 transitions. [2023-02-18 15:58:37,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.4324324324324325) internal successors, (53), 37 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:58:37,646 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 467 transitions. [2023-02-18 15:58:37,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-18 15:58:37,646 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:58:37,646 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:58:37,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-02-18 15:58:37,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-02-18 15:58:37,851 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:58:37,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:58:37,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1930698324, now seen corresponding path program 17 times [2023-02-18 15:58:37,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:58:37,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048173587] [2023-02-18 15:58:37,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:58:37,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:58:37,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:58:37,990 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-02-18 15:58:37,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:58:37,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048173587] [2023-02-18 15:58:37,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048173587] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:58:37,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284926403] [2023-02-18 15:58:37,990 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 15:58:37,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:58:37,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:58:37,992 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 15:58:37,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-02-18 15:58:38,418 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-02-18 15:58:38,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:58:38,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-18 15:58:38,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:58:38,518 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-02-18 15:58:38,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:58:38,725 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-02-18 15:58:38,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284926403] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:58:38,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:58:38,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 14] total 34 [2023-02-18 15:58:38,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285689419] [2023-02-18 15:58:38,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:58:38,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-18 15:58:38,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:58:38,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-18 15:58:38,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=956, Unknown=0, NotChecked=0, Total=1122 [2023-02-18 15:58:38,727 INFO L87 Difference]: Start difference. First operand 333 states and 467 transitions. Second operand has 34 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:58:40,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:58:40,974 INFO L93 Difference]: Finished difference Result 570 states and 704 transitions. [2023-02-18 15:58:40,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-02-18 15:58:40,975 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-02-18 15:58:40,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:58:40,976 INFO L225 Difference]: With dead ends: 570 [2023-02-18 15:58:40,976 INFO L226 Difference]: Without dead ends: 484 [2023-02-18 15:58:40,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 42 SyntacticMatches, 9 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=313, Invalid=1943, Unknown=0, NotChecked=0, Total=2256 [2023-02-18 15:58:40,977 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 184 mSDsluCounter, 790 mSDsCounter, 0 mSdLazyCounter, 1103 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 1163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-18 15:58:40,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 838 Invalid, 1163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1103 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-18 15:58:40,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2023-02-18 15:58:41,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 315. [2023-02-18 15:58:41,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 1.3789808917197452) internal successors, (433), 314 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:58:41,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 433 transitions. [2023-02-18 15:58:41,150 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 433 transitions. Word has length 34 [2023-02-18 15:58:41,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:58:41,151 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 433 transitions. [2023-02-18 15:58:41,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:58:41,151 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 433 transitions. [2023-02-18 15:58:41,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-18 15:58:41,151 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:58:41,152 INFO L195 NwaCegarLoop]: trace histogram [16, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:58:41,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-02-18 15:58:41,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:58:41,353 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:58:41,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:58:41,353 INFO L85 PathProgramCache]: Analyzing trace with hash -214196591, now seen corresponding path program 18 times [2023-02-18 15:58:41,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:58:41,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068133514] [2023-02-18 15:58:41,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:58:41,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:58:41,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:58:41,576 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 15:58:41,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:58:41,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068133514] [2023-02-18 15:58:41,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068133514] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:58:41,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434908344] [2023-02-18 15:58:41,577 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 15:58:41,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:58:41,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:58:41,578 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 15:58:41,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-02-18 15:58:42,063 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-02-18 15:58:42,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:58:42,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 43 conjunts are in the unsatisfiable core [2023-02-18 15:58:42,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:58:42,222 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 15:58:42,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:58:42,741 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 15:58:42,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434908344] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:58:42,741 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:58:42,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 45 [2023-02-18 15:58:42,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800374198] [2023-02-18 15:58:42,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:58:42,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-02-18 15:58:42,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:58:42,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-02-18 15:58:42,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=396, Invalid=1584, Unknown=0, NotChecked=0, Total=1980 [2023-02-18 15:58:42,743 INFO L87 Difference]: Start difference. First operand 315 states and 433 transitions. Second operand has 45 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 45 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:00:22,620 WARN L837 $PredicateComparison]: unable to prove that (and (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 8) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967295) 4294967296) 0) (> (mod |c_ULTIMATE.start_main_~z~0#1| 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 7) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 9) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 12) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 5) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 6) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 1) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 10) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 11) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967293) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 13) 4294967296) 0) (> (mod |c_ULTIMATE.start_main_~y~0#1| 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 3) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967294) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 2) 4294967296) 0)) is different from false [2023-02-18 16:00:35,495 WARN L837 $PredicateComparison]: unable to prove that (and (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 8) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967295) 4294967296) 0) (> (mod |c_ULTIMATE.start_main_~z~0#1| 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 7) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 9) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 5) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 6) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 1) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 10) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 11) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967295) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967293) 4294967296) 0) (> (mod |c_ULTIMATE.start_main_~y~0#1| 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 3) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967294) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967294) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 2) 4294967296) 0)) is different from false [2023-02-18 16:03:13,530 WARN L837 $PredicateComparison]: unable to prove that (and (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 8) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967295) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 7) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 9) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 12) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 5) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 6) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 1) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 10) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 11) 4294967296) 0) (> (mod |c_ULTIMATE.start_main_~y~0#1| 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 3) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967293) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 2) 4294967296) 0)) is different from false