./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/in-de51.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-de51.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 6b650e50691cb35e1bdf008faa87d25716bf83c58902e8bffb444ab81952ff19 --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 15:56:22,340 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 15:56:22,342 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 15:56:22,369 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 15:56:22,370 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 15:56:22,372 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 15:56:22,374 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 15:56:22,376 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 15:56:22,378 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 15:56:22,381 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 15:56:22,382 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 15:56:22,384 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 15:56:22,384 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 15:56:22,386 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 15:56:22,386 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 15:56:22,387 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 15:56:22,388 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 15:56:22,389 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 15:56:22,390 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 15:56:22,394 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 15:56:22,394 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 15:56:22,395 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 15:56:22,396 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 15:56:22,397 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 15:56:22,403 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 15:56:22,403 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 15:56:22,403 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 15:56:22,404 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 15:56:22,405 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 15:56:22,405 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 15:56:22,405 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 15:56:22,406 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 15:56:22,407 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 15:56:22,408 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 15:56:22,408 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 15:56:22,408 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 15:56:22,409 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 15:56:22,409 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 15:56:22,409 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 15:56:22,410 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 15:56:22,410 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 15:56:22,411 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 15:56:22,434 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 15:56:22,434 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 15:56:22,435 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 15:56:22,435 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 15:56:22,435 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 15:56:22,435 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 15:56:22,436 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 15:56:22,436 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 15:56:22,436 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 15:56:22,436 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 15:56:22,437 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 15:56:22,437 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 15:56:22,437 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 15:56:22,438 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 15:56:22,438 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 15:56:22,438 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 15:56:22,438 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 15:56:22,438 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 15:56:22,438 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 15:56:22,438 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 15:56:22,439 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 15:56:22,439 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 15:56:22,439 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 15:56:22,439 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 15:56:22,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 15:56:22,439 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 15:56:22,439 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 15:56:22,440 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 15:56:22,440 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 15:56:22,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 15:56:22,440 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 15:56:22,440 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 15:56:22,440 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 15:56:22,441 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 15:56:22,441 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 15:56:22,441 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b650e50691cb35e1bdf008faa87d25716bf83c58902e8bffb444ab81952ff19 [2023-02-18 15:56:22,639 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 15:56:22,660 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 15:56:22,661 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 15:56:22,662 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 15:56:22,662 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 15:56:22,663 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/in-de51.c [2023-02-18 15:56:23,639 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 15:56:23,816 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 15:56:23,816 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de51.c [2023-02-18 15:56:23,820 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b4dbf160/9f15396e8af94a9a85aa061ffa6e0135/FLAG2a659eb17 [2023-02-18 15:56:23,830 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b4dbf160/9f15396e8af94a9a85aa061ffa6e0135 [2023-02-18 15:56:23,831 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 15:56:23,832 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 15:56:23,833 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 15:56:23,833 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 15:56:23,836 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 15:56:23,836 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 03:56:23" (1/1) ... [2023-02-18 15:56:23,837 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41a24e35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:56:23, skipping insertion in model container [2023-02-18 15:56:23,837 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 03:56:23" (1/1) ... [2023-02-18 15:56:23,842 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 15:56:23,850 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 15:56:23,948 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-de51.c[368,381] [2023-02-18 15:56:23,960 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 15:56:23,967 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 15:56:23,975 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-de51.c[368,381] [2023-02-18 15:56:23,987 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 15:56:23,999 INFO L208 MainTranslator]: Completed translation [2023-02-18 15:56:24,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:56:23 WrapperNode [2023-02-18 15:56:24,000 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 15:56:24,001 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 15:56:24,001 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 15:56:24,001 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 15:56:24,006 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:56:23" (1/1) ... [2023-02-18 15:56:24,011 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:56:23" (1/1) ... [2023-02-18 15:56:24,024 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 75 [2023-02-18 15:56:24,025 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 15:56:24,025 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 15:56:24,025 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 15:56:24,026 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 15:56:24,031 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:56:23" (1/1) ... [2023-02-18 15:56:24,032 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:56:23" (1/1) ... [2023-02-18 15:56:24,038 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:56:23" (1/1) ... [2023-02-18 15:56:24,039 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:56:23" (1/1) ... [2023-02-18 15:56:24,046 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:56:23" (1/1) ... [2023-02-18 15:56:24,049 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:56:23" (1/1) ... [2023-02-18 15:56:24,052 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:56:23" (1/1) ... [2023-02-18 15:56:24,052 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:56:23" (1/1) ... [2023-02-18 15:56:24,054 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 15:56:24,056 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 15:56:24,056 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 15:56:24,056 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 15:56:24,057 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:56:23" (1/1) ... [2023-02-18 15:56:24,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 15:56:24,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:56:24,114 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 15:56:24,177 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 15:56:24,190 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 15:56:24,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 15:56:24,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 15:56:24,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 15:56:24,230 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 15:56:24,232 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 15:56:24,332 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 15:56:24,336 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 15:56:24,336 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2023-02-18 15:56:24,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 03:56:24 BoogieIcfgContainer [2023-02-18 15:56:24,337 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 15:56:24,338 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 15:56:24,338 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 15:56:24,353 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 15:56:24,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 03:56:23" (1/3) ... [2023-02-18 15:56:24,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d6585fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 03:56:24, skipping insertion in model container [2023-02-18 15:56:24,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:56:23" (2/3) ... [2023-02-18 15:56:24,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d6585fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 03:56:24, skipping insertion in model container [2023-02-18 15:56:24,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 03:56:24" (3/3) ... [2023-02-18 15:56:24,355 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de51.c [2023-02-18 15:56:24,366 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 15:56:24,366 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 15:56:24,422 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 15:56:24,427 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;@3165456d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 15:56:24,427 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 15:56:24,430 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 15 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 15:56:24,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-18 15:56:24,434 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:56:24,434 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:56:24,435 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:56:24,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:56:24,439 INFO L85 PathProgramCache]: Analyzing trace with hash 62220644, now seen corresponding path program 1 times [2023-02-18 15:56:24,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:56:24,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501301860] [2023-02-18 15:56:24,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:56:24,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:56:24,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:56:24,572 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 15:56:24,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:56:24,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501301860] [2023-02-18 15:56:24,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501301860] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 15:56:24,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 15:56:24,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 15:56:24,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967449382] [2023-02-18 15:56:24,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 15:56:24,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 15:56:24,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:56:24,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 15:56:24,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 15:56:24,601 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 15 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) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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 15:56:24,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:56:24,611 INFO L93 Difference]: Finished difference Result 29 states and 47 transitions. [2023-02-18 15:56:24,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 15:56:24,616 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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 15:56:24,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:56:24,620 INFO L225 Difference]: With dead ends: 29 [2023-02-18 15:56:24,620 INFO L226 Difference]: Without dead ends: 12 [2023-02-18 15:56:24,622 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 15:56:24,625 INFO L413 NwaCegarLoop]: 20 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, 20 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 15:56:24,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 15:56:24,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-02-18 15:56:24,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-02-18 15:56:24,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 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 15:56:24,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2023-02-18 15:56:24,651 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 11 [2023-02-18 15:56:24,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:56:24,652 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2023-02-18 15:56:24,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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 15:56:24,652 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2023-02-18 15:56:24,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-18 15:56:24,653 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:56:24,653 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:56:24,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 15:56:24,654 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:56:24,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:56:24,655 INFO L85 PathProgramCache]: Analyzing trace with hash 58526560, now seen corresponding path program 1 times [2023-02-18 15:56:24,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:56:24,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009240830] [2023-02-18 15:56:24,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:56:24,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:56:24,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:56:24,925 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 15:56:24,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:56:24,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009240830] [2023-02-18 15:56:24,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009240830] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 15:56:24,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 15:56:24,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 15:56:24,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039521448] [2023-02-18 15:56:24,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 15:56:24,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 15:56:24,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:56:24,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 15:56:24,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 15:56:24,929 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 15:56:24,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:56:24,972 INFO L93 Difference]: Finished difference Result 22 states and 30 transitions. [2023-02-18 15:56:24,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 15:56:24,972 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 15:56:24,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:56:24,973 INFO L225 Difference]: With dead ends: 22 [2023-02-18 15:56:24,975 INFO L226 Difference]: Without dead ends: 18 [2023-02-18 15:56:24,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 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 15:56:24,977 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 15:56:24,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 25 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 15:56:24,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-02-18 15:56:24,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-02-18 15:56:24,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 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 15:56:24,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 26 transitions. [2023-02-18 15:56:24,983 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 26 transitions. Word has length 11 [2023-02-18 15:56:24,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:56:24,985 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 26 transitions. [2023-02-18 15:56:24,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 15:56:24,986 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 26 transitions. [2023-02-18 15:56:24,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-18 15:56:24,987 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:56:24,987 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:56:24,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-18 15:56:24,988 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:56:24,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:56:24,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1815988777, now seen corresponding path program 1 times [2023-02-18 15:56:24,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:56:24,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112474121] [2023-02-18 15:56:24,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:56:24,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:56:25,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:56:25,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:56:25,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:56:25,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112474121] [2023-02-18 15:56:25,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112474121] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 15:56:25,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 15:56:25,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 15:56:25,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133890304] [2023-02-18 15:56:25,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 15:56:25,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 15:56:25,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:56:25,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 15:56:25,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 15:56:25,026 INFO L87 Difference]: Start difference. First operand 18 states and 26 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 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 15:56:25,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:56:25,038 INFO L93 Difference]: Finished difference Result 29 states and 42 transitions. [2023-02-18 15:56:25,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 15:56:25,039 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 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 15:56:25,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:56:25,039 INFO L225 Difference]: With dead ends: 29 [2023-02-18 15:56:25,040 INFO L226 Difference]: Without dead ends: 23 [2023-02-18 15:56:25,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 15:56:25,041 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 15:56:25,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 20 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 15:56:25,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-02-18 15:56:25,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-02-18 15:56:25,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 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 15:56:25,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 34 transitions. [2023-02-18 15:56:25,046 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 34 transitions. Word has length 12 [2023-02-18 15:56:25,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:56:25,046 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 34 transitions. [2023-02-18 15:56:25,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 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 15:56:25,047 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 34 transitions. [2023-02-18 15:56:25,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-18 15:56:25,047 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:56:25,047 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:56:25,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-18 15:56:25,047 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:56:25,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:56:25,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1861241306, now seen corresponding path program 1 times [2023-02-18 15:56:25,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:56:25,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051709541] [2023-02-18 15:56:25,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:56:25,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:56:25,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:56:25,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:56:25,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:56:25,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051709541] [2023-02-18 15:56:25,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051709541] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 15:56:25,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 15:56:25,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 15:56:25,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540926412] [2023-02-18 15:56:25,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 15:56:25,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 15:56:25,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:56:25,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 15:56:25,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 15:56:25,068 INFO L87 Difference]: Start difference. First operand 23 states and 34 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 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 15:56:25,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:56:25,083 INFO L93 Difference]: Finished difference Result 41 states and 59 transitions. [2023-02-18 15:56:25,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 15:56:25,083 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 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 15:56:25,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:56:25,084 INFO L225 Difference]: With dead ends: 41 [2023-02-18 15:56:25,084 INFO L226 Difference]: Without dead ends: 32 [2023-02-18 15:56:25,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 15:56:25,085 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 15:56:25,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 19 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 15:56:25,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-18 15:56:25,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2023-02-18 15:56:25,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.5) internal successors, (39), 26 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 15:56:25,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 39 transitions. [2023-02-18 15:56:25,091 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 39 transitions. Word has length 12 [2023-02-18 15:56:25,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:56:25,092 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 39 transitions. [2023-02-18 15:56:25,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 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 15:56:25,092 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 39 transitions. [2023-02-18 15:56:25,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-18 15:56:25,092 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:56:25,093 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:56:25,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-18 15:56:25,093 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:56:25,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:56:25,093 INFO L85 PathProgramCache]: Analyzing trace with hash -492890182, now seen corresponding path program 1 times [2023-02-18 15:56:25,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:56:25,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985022481] [2023-02-18 15:56:25,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:56:25,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:56:25,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:56:25,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:56:25,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:56:25,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985022481] [2023-02-18 15:56:25,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985022481] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 15:56:25,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 15:56:25,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 15:56:25,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741631131] [2023-02-18 15:56:25,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 15:56:25,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 15:56:25,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:56:25,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 15:56:25,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 15:56:25,129 INFO L87 Difference]: Start difference. First operand 27 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 15:56:25,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:56:25,149 INFO L93 Difference]: Finished difference Result 38 states and 55 transitions. [2023-02-18 15:56:25,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 15:56:25,149 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 15:56:25,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:56:25,150 INFO L225 Difference]: With dead ends: 38 [2023-02-18 15:56:25,150 INFO L226 Difference]: Without dead ends: 21 [2023-02-18 15:56:25,150 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 15:56:25,151 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 3 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 15:56:25,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 31 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 15:56:25,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-02-18 15:56:25,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-02-18 15:56:25,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 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 15:56:25,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 30 transitions. [2023-02-18 15:56:25,155 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 30 transitions. Word has length 12 [2023-02-18 15:56:25,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:56:25,155 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 30 transitions. [2023-02-18 15:56:25,156 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 15:56:25,156 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 30 transitions. [2023-02-18 15:56:25,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-18 15:56:25,156 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:56:25,156 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:56:25,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-18 15:56:25,157 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:56:25,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:56:25,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1431516133, now seen corresponding path program 1 times [2023-02-18 15:56:25,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:56:25,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337667350] [2023-02-18 15:56:25,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:56:25,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:56:25,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:56:25,220 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 15:56:25,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:56:25,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337667350] [2023-02-18 15:56:25,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337667350] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:56:25,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779598439] [2023-02-18 15:56:25,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:56:25,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:56:25,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:56:25,224 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 15:56:25,226 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 15:56:25,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:56:25,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-18 15:56:25,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:56:25,291 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 15:56:25,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:56:25,324 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 15:56:25,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779598439] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:56:25,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:56:25,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-02-18 15:56:25,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593806237] [2023-02-18 15:56:25,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:56:25,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 15:56:25,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:56:25,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 15:56:25,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-18 15:56:25,331 INFO L87 Difference]: Start difference. First operand 21 states and 30 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 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 15:56:25,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:56:25,417 INFO L93 Difference]: Finished difference Result 84 states and 118 transitions. [2023-02-18 15:56:25,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 15:56:25,418 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 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 12 [2023-02-18 15:56:25,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:56:25,420 INFO L225 Difference]: With dead ends: 84 [2023-02-18 15:56:25,421 INFO L226 Difference]: Without dead ends: 71 [2023-02-18 15:56:25,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2023-02-18 15:56:25,426 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 48 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 15:56:25,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 69 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 15:56:25,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-02-18 15:56:25,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 33. [2023-02-18 15:56:25,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.46875) internal successors, (47), 32 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 15:56:25,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 47 transitions. [2023-02-18 15:56:25,439 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 47 transitions. Word has length 12 [2023-02-18 15:56:25,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:56:25,439 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 47 transitions. [2023-02-18 15:56:25,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 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 15:56:25,439 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 47 transitions. [2023-02-18 15:56:25,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-18 15:56:25,440 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:56:25,441 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:56:25,446 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 15:56:25,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-02-18 15:56:25,646 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:56:25,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:56:25,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1643101482, now seen corresponding path program 1 times [2023-02-18 15:56:25,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:56:25,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815872223] [2023-02-18 15:56:25,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:56:25,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:56:25,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:56:25,745 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:56:25,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:56:25,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815872223] [2023-02-18 15:56:25,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815872223] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:56:25,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549527381] [2023-02-18 15:56:25,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:56:25,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:56:25,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:56:25,748 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 15:56:25,750 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 15:56:25,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:56:25,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-18 15:56:25,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:56:25,807 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 15:56:25,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:56:25,810 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 15:56:25,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549527381] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:56:25,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:56:25,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 9 [2023-02-18 15:56:25,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809016786] [2023-02-18 15:56:25,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:56:25,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 15:56:25,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:56:25,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 15:56:25,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-02-18 15:56:25,814 INFO L87 Difference]: Start difference. First operand 33 states and 47 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 15:56:25,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:56:25,920 INFO L93 Difference]: Finished difference Result 77 states and 106 transitions. [2023-02-18 15:56:25,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-18 15:56:25,920 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 14 [2023-02-18 15:56:25,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:56:25,921 INFO L225 Difference]: With dead ends: 77 [2023-02-18 15:56:25,921 INFO L226 Difference]: Without dead ends: 67 [2023-02-18 15:56:25,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-02-18 15:56:25,922 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 33 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 15:56:25,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 53 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 15:56:25,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-02-18 15:56:25,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 43. [2023-02-18 15:56:25,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 42 states have internal predecessors, (61), 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 15:56:25,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 61 transitions. [2023-02-18 15:56:25,929 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 61 transitions. Word has length 14 [2023-02-18 15:56:25,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:56:25,929 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 61 transitions. [2023-02-18 15:56:25,929 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 15:56:25,929 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 61 transitions. [2023-02-18 15:56:25,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-18 15:56:25,930 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:56:25,930 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:56:25,936 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 15:56:26,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-02-18 15:56:26,135 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:56:26,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:56:26,135 INFO L85 PathProgramCache]: Analyzing trace with hash 834986528, now seen corresponding path program 2 times [2023-02-18 15:56:26,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:56:26,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632584792] [2023-02-18 15:56:26,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:56:26,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:56:26,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:56:26,204 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 15:56:26,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:56:26,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632584792] [2023-02-18 15:56:26,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632584792] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:56:26,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024461266] [2023-02-18 15:56:26,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 15:56:26,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:56:26,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:56:26,207 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 15:56:26,209 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 15:56:26,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 15:56:26,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:56:26,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-18 15:56:26,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:56:26,265 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 15:56:26,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:56:26,318 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 15:56:26,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024461266] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:56:26,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:56:26,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-02-18 15:56:26,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449089867] [2023-02-18 15:56:26,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:56:26,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-18 15:56:26,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:56:26,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-18 15:56:26,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-02-18 15:56:26,320 INFO L87 Difference]: Start difference. First operand 43 states and 61 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 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 15:56:26,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:56:26,748 INFO L93 Difference]: Finished difference Result 218 states and 321 transitions. [2023-02-18 15:56:26,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-18 15:56:26,749 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 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 15:56:26,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:56:26,750 INFO L225 Difference]: With dead ends: 218 [2023-02-18 15:56:26,750 INFO L226 Difference]: Without dead ends: 201 [2023-02-18 15:56:26,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 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 15:56:26,751 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 352 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 15:56:26,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 296 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 15:56:26,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2023-02-18 15:56:26,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 70. [2023-02-18 15:56:26,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.434782608695652) internal successors, (99), 69 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 15:56:26,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 99 transitions. [2023-02-18 15:56:26,764 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 99 transitions. Word has length 15 [2023-02-18 15:56:26,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:56:26,766 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 99 transitions. [2023-02-18 15:56:26,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 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 15:56:26,766 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 99 transitions. [2023-02-18 15:56:26,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-18 15:56:26,767 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:56:26,767 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:56:26,774 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 15:56:26,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:56:26,974 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:56:26,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:56:26,976 INFO L85 PathProgramCache]: Analyzing trace with hash -71318983, now seen corresponding path program 1 times [2023-02-18 15:56:26,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:56:26,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258117651] [2023-02-18 15:56:26,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:56:26,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:56:27,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:56:27,145 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 15:56:27,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:56:27,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258117651] [2023-02-18 15:56:27,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258117651] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:56:27,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467615281] [2023-02-18 15:56:27,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:56:27,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:56:27,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:56:27,165 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 15:56:27,195 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 15:56:27,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:56:27,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-18 15:56:27,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:56:27,268 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 15:56:27,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:56:27,410 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 15:56:27,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467615281] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:56:27,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:56:27,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 10 [2023-02-18 15:56:27,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308189130] [2023-02-18 15:56:27,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:56:27,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 15:56:27,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:56:27,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 15:56:27,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-02-18 15:56:27,412 INFO L87 Difference]: Start difference. First operand 70 states and 99 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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 15:56:27,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:56:27,464 INFO L93 Difference]: Finished difference Result 80 states and 111 transitions. [2023-02-18 15:56:27,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 15:56:27,465 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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) Word has length 16 [2023-02-18 15:56:27,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:56:27,465 INFO L225 Difference]: With dead ends: 80 [2023-02-18 15:56:27,465 INFO L226 Difference]: Without dead ends: 71 [2023-02-18 15:56:27,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 9 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-02-18 15:56:27,467 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 15:56:27,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 57 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 15:56:27,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-02-18 15:56:27,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2023-02-18 15:56:27,482 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 15:56:27,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 99 transitions. [2023-02-18 15:56:27,484 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 99 transitions. Word has length 16 [2023-02-18 15:56:27,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:56:27,485 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 99 transitions. [2023-02-18 15:56:27,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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 15:56:27,485 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 99 transitions. [2023-02-18 15:56:27,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-18 15:56:27,488 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:56:27,488 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:56:27,493 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-18 15:56:27,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:56:27,692 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:56:27,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:56:27,693 INFO L85 PathProgramCache]: Analyzing trace with hash 2085744240, now seen corresponding path program 2 times [2023-02-18 15:56:27,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:56:27,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333751224] [2023-02-18 15:56:27,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:56:27,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:56:27,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:56:27,768 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 15:56:27,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:56:27,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333751224] [2023-02-18 15:56:27,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333751224] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:56:27,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927405761] [2023-02-18 15:56:27,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 15:56:27,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:56:27,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:56:27,770 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 15:56:27,773 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 15:56:27,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 15:56:27,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:56:27,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-18 15:56:27,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:56:27,837 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 15:56:27,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:56:27,851 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 15:56:27,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927405761] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:56:27,852 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:56:27,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 4] total 10 [2023-02-18 15:56:27,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429455950] [2023-02-18 15:56:27,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:56:27,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 15:56:27,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:56:27,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 15:56:27,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-02-18 15:56:27,854 INFO L87 Difference]: Start difference. First operand 71 states and 99 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 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 15:56:27,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:56:27,898 INFO L93 Difference]: Finished difference Result 90 states and 124 transitions. [2023-02-18 15:56:27,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 15:56:27,899 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 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 17 [2023-02-18 15:56:27,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:56:27,899 INFO L225 Difference]: With dead ends: 90 [2023-02-18 15:56:27,899 INFO L226 Difference]: Without dead ends: 76 [2023-02-18 15:56:27,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2023-02-18 15:56:27,900 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 15:56:27,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 54 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 15:56:27,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-02-18 15:56:27,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 69. [2023-02-18 15:56:27,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.4705882352941178) internal successors, (100), 68 states have internal predecessors, (100), 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 15:56:27,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 100 transitions. [2023-02-18 15:56:27,928 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 100 transitions. Word has length 17 [2023-02-18 15:56:27,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:56:27,928 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 100 transitions. [2023-02-18 15:56:27,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 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 15:56:27,928 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 100 transitions. [2023-02-18 15:56:27,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-18 15:56:27,929 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:56:27,929 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:56:27,934 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-18 15:56:28,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-18 15:56:28,136 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:56:28,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:56:28,136 INFO L85 PathProgramCache]: Analyzing trace with hash 2118522240, now seen corresponding path program 1 times [2023-02-18 15:56:28,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:56:28,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878790803] [2023-02-18 15:56:28,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:56:28,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:56:28,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:56:28,202 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 15:56:28,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:56:28,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878790803] [2023-02-18 15:56:28,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878790803] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:56:28,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126932651] [2023-02-18 15:56:28,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:56:28,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:56:28,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:56:28,204 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 15:56:28,205 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 15:56:28,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:56:28,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-18 15:56:28,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:56:28,248 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 15:56:28,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:56:28,279 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 15:56:28,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126932651] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:56:28,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:56:28,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-02-18 15:56:28,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240672400] [2023-02-18 15:56:28,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:56:28,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-18 15:56:28,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:56:28,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-18 15:56:28,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-02-18 15:56:28,282 INFO L87 Difference]: Start difference. First operand 69 states and 100 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 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 15:56:28,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:56:28,394 INFO L93 Difference]: Finished difference Result 126 states and 170 transitions. [2023-02-18 15:56:28,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-18 15:56:28,395 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-02-18 15:56:28,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:56:28,395 INFO L225 Difference]: With dead ends: 126 [2023-02-18 15:56:28,395 INFO L226 Difference]: Without dead ends: 107 [2023-02-18 15:56:28,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-02-18 15:56:28,396 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 74 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 15:56:28,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 118 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 15:56:28,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-02-18 15:56:28,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 63. [2023-02-18 15:56:28,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.4516129032258065) internal successors, (90), 62 states have internal predecessors, (90), 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 15:56:28,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 90 transitions. [2023-02-18 15:56:28,402 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 90 transitions. Word has length 17 [2023-02-18 15:56:28,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:56:28,403 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 90 transitions. [2023-02-18 15:56:28,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 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 15:56:28,403 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 90 transitions. [2023-02-18 15:56:28,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-18 15:56:28,403 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:56:28,403 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:56:28,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-18 15:56:28,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:56:28,608 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:56:28,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:56:28,608 INFO L85 PathProgramCache]: Analyzing trace with hash 855427872, now seen corresponding path program 2 times [2023-02-18 15:56:28,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:56:28,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744019068] [2023-02-18 15:56:28,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:56:28,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:56:28,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:56:28,663 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:56:28,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:56:28,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744019068] [2023-02-18 15:56:28,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744019068] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:56:28,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636546037] [2023-02-18 15:56:28,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 15:56:28,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:56:28,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:56:28,665 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 15:56:28,666 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 15:56:28,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 15:56:28,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:56:28,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-18 15:56:28,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:56:28,716 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 15:56:28,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:56:28,718 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 15:56:28,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636546037] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:56:28,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:56:28,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 12 [2023-02-18 15:56:28,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010122618] [2023-02-18 15:56:28,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:56:28,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 15:56:28,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:56:28,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 15:56:28,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-02-18 15:56:28,720 INFO L87 Difference]: Start difference. First operand 63 states and 90 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 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 15:56:28,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:56:28,959 INFO L93 Difference]: Finished difference Result 140 states and 194 transitions. [2023-02-18 15:56:28,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-18 15:56:28,960 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-02-18 15:56:28,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:56:28,960 INFO L225 Difference]: With dead ends: 140 [2023-02-18 15:56:28,960 INFO L226 Difference]: Without dead ends: 127 [2023-02-18 15:56:28,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2023-02-18 15:56:28,961 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 90 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 15:56:28,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 120 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 15:56:28,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-02-18 15:56:28,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 82. [2023-02-18 15:56:28,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.4197530864197532) internal successors, (115), 81 states have internal predecessors, (115), 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 15:56:28,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 115 transitions. [2023-02-18 15:56:28,970 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 115 transitions. Word has length 17 [2023-02-18 15:56:28,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:56:28,970 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 115 transitions. [2023-02-18 15:56:28,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 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 15:56:28,970 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 115 transitions. [2023-02-18 15:56:28,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-18 15:56:28,971 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:56:28,971 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:56:28,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-18 15:56:29,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:56:29,176 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:56:29,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:56:29,176 INFO L85 PathProgramCache]: Analyzing trace with hash -92433222, now seen corresponding path program 3 times [2023-02-18 15:56:29,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:56:29,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966360195] [2023-02-18 15:56:29,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:56:29,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:56:29,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:56:29,226 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-18 15:56:29,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:56:29,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966360195] [2023-02-18 15:56:29,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966360195] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:56:29,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810228208] [2023-02-18 15:56:29,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 15:56:29,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:56:29,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:56:29,228 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 15:56:29,230 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 15:56:29,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-18 15:56:29,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:56:29,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-18 15:56:29,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:56:29,274 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-18 15:56:29,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:56:29,293 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-18 15:56:29,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810228208] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:56:29,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:56:29,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2023-02-18 15:56:29,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059932505] [2023-02-18 15:56:29,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:56:29,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 15:56:29,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:56:29,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 15:56:29,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 15:56:29,295 INFO L87 Difference]: Start difference. First operand 82 states and 115 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 15:56:29,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:56:29,345 INFO L93 Difference]: Finished difference Result 116 states and 156 transitions. [2023-02-18 15:56:29,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 15:56:29,346 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 20 [2023-02-18 15:56:29,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:56:29,346 INFO L225 Difference]: With dead ends: 116 [2023-02-18 15:56:29,347 INFO L226 Difference]: Without dead ends: 108 [2023-02-18 15:56:29,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 10 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-18 15:56:29,347 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 24 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 15:56:29,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 52 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 15:56:29,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-02-18 15:56:29,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 86. [2023-02-18 15:56:29,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.4) internal successors, (119), 85 states have internal predecessors, (119), 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 15:56:29,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 119 transitions. [2023-02-18 15:56:29,358 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 119 transitions. Word has length 20 [2023-02-18 15:56:29,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:56:29,358 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 119 transitions. [2023-02-18 15:56:29,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 15:56:29,358 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 119 transitions. [2023-02-18 15:56:29,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-18 15:56:29,359 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:56:29,359 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:56:29,363 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 15:56:29,564 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,SelfDestructingSolverStorable12 [2023-02-18 15:56:29,564 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:56:29,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:56:29,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1617038102, now seen corresponding path program 3 times [2023-02-18 15:56:29,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:56:29,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697982324] [2023-02-18 15:56:29,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:56:29,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:56:29,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:56:29,637 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:56:29,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:56:29,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697982324] [2023-02-18 15:56:29,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697982324] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:56:29,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933416476] [2023-02-18 15:56:29,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 15:56:29,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:56:29,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:56:29,639 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 15:56:29,641 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 15:56:29,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-18 15:56:29,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:56:29,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-18 15:56:29,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:56:29,715 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 15:56:29,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:56:29,718 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 15:56:29,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933416476] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:56:29,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:56:29,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 15 [2023-02-18 15:56:29,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21876586] [2023-02-18 15:56:29,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:56:29,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-18 15:56:29,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:56:29,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-18 15:56:29,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2023-02-18 15:56:29,720 INFO L87 Difference]: Start difference. First operand 86 states and 119 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 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 15:56:30,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:56:30,408 INFO L93 Difference]: Finished difference Result 214 states and 283 transitions. [2023-02-18 15:56:30,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-02-18 15:56:30,408 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 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 15:56:30,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:56:30,409 INFO L225 Difference]: With dead ends: 214 [2023-02-18 15:56:30,409 INFO L226 Difference]: Without dead ends: 195 [2023-02-18 15:56:30,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=367, Invalid=2603, Unknown=0, NotChecked=0, Total=2970 [2023-02-18 15:56:30,410 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 205 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 15:56:30,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 171 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 15:56:30,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2023-02-18 15:56:30,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 105. [2023-02-18 15:56:30,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.375) internal successors, (143), 104 states have internal predecessors, (143), 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 15:56:30,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 143 transitions. [2023-02-18 15:56:30,423 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 143 transitions. Word has length 20 [2023-02-18 15:56:30,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:56:30,423 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 143 transitions. [2023-02-18 15:56:30,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 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 15:56:30,423 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 143 transitions. [2023-02-18 15:56:30,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-18 15:56:30,424 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:56:30,424 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:56:30,431 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 15:56:30,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-18 15:56:30,629 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:56:30,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:56:30,629 INFO L85 PathProgramCache]: Analyzing trace with hash 378545017, now seen corresponding path program 4 times [2023-02-18 15:56:30,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:56:30,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334857940] [2023-02-18 15:56:30,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:56:30,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:56:30,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:56:30,693 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 15:56:30,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:56:30,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334857940] [2023-02-18 15:56:30,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334857940] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:56:30,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990481094] [2023-02-18 15:56:30,694 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 15:56:30,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:56:30,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:56:30,707 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 15:56:30,732 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 15:56:30,738 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 15:56:30,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:56:30,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-18 15:56:30,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:56:30,760 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 15:56:30,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:56:30,848 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 15:56:30,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990481094] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:56:30,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:56:30,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2023-02-18 15:56:30,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280461146] [2023-02-18 15:56:30,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:56:30,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-18 15:56:30,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:56:30,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-18 15:56:30,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2023-02-18 15:56:30,849 INFO L87 Difference]: Start difference. First operand 105 states and 143 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 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 15:56:32,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:56:32,214 INFO L93 Difference]: Finished difference Result 393 states and 550 transitions. [2023-02-18 15:56:32,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-02-18 15:56:32,214 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 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 20 [2023-02-18 15:56:32,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:56:32,215 INFO L225 Difference]: With dead ends: 393 [2023-02-18 15:56:32,215 INFO L226 Difference]: Without dead ends: 357 [2023-02-18 15:56:32,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1451 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1180, Invalid=3376, Unknown=0, NotChecked=0, Total=4556 [2023-02-18 15:56:32,217 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 541 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 15:56:32,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [541 Valid, 386 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 15:56:32,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2023-02-18 15:56:32,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 123. [2023-02-18 15:56:32,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.3934426229508197) internal successors, (170), 122 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 15:56:32,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 170 transitions. [2023-02-18 15:56:32,233 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 170 transitions. Word has length 20 [2023-02-18 15:56:32,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:56:32,234 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 170 transitions. [2023-02-18 15:56:32,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 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 15:56:32,234 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 170 transitions. [2023-02-18 15:56:32,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-18 15:56:32,234 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:56:32,235 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:56:32,241 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 15:56:32,439 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,SelfDestructingSolverStorable14 [2023-02-18 15:56:32,439 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:56:32,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:56:32,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1969210240, now seen corresponding path program 5 times [2023-02-18 15:56:32,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:56:32,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696656178] [2023-02-18 15:56:32,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:56:32,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:56:32,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:56:32,637 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 15:56:32,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:56:32,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696656178] [2023-02-18 15:56:32,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696656178] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:56:32,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159979995] [2023-02-18 15:56:32,638 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 15:56:32,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:56:32,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:56:32,639 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 15:56:32,668 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 15:56:32,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 15:56:32,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:56:32,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-18 15:56:32,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:56:32,738 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 15:56:32,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:56:32,773 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 15:56:32,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159979995] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:56:32,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:56:32,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 15 [2023-02-18 15:56:32,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780873854] [2023-02-18 15:56:32,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:56:32,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-18 15:56:32,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:56:32,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-18 15:56:32,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-02-18 15:56:32,775 INFO L87 Difference]: Start difference. First operand 123 states and 170 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 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 15:56:32,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:56:32,862 INFO L93 Difference]: Finished difference Result 136 states and 183 transitions. [2023-02-18 15:56:32,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 15:56:32,863 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 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 21 [2023-02-18 15:56:32,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:56:32,863 INFO L225 Difference]: With dead ends: 136 [2023-02-18 15:56:32,863 INFO L226 Difference]: Without dead ends: 113 [2023-02-18 15:56:32,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2023-02-18 15:56:32,864 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 3 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 15:56:32,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 73 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 15:56:32,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-02-18 15:56:32,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2023-02-18 15:56:32,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.4107142857142858) internal successors, (158), 112 states have internal predecessors, (158), 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 15:56:32,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 158 transitions. [2023-02-18 15:56:32,877 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 158 transitions. Word has length 21 [2023-02-18 15:56:32,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:56:32,877 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 158 transitions. [2023-02-18 15:56:32,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 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 15:56:32,877 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 158 transitions. [2023-02-18 15:56:32,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-18 15:56:32,878 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:56:32,878 INFO L195 NwaCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:56:32,893 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-02-18 15:56:33,082 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,SelfDestructingSolverStorable15 [2023-02-18 15:56:33,082 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:56:33,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:56:33,083 INFO L85 PathProgramCache]: Analyzing trace with hash -437492933, now seen corresponding path program 3 times [2023-02-18 15:56:33,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:56:33,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455883324] [2023-02-18 15:56:33,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:56:33,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:56:33,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:56:33,224 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:56:33,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:56:33,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455883324] [2023-02-18 15:56:33,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455883324] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:56:33,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579189461] [2023-02-18 15:56:33,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 15:56:33,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:56:33,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:56:33,226 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 15:56:33,228 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 15:56:33,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-02-18 15:56:33,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:56:33,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-18 15:56:33,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:56:33,349 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:56:33,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:56:33,538 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:56:33,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579189461] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:56:33,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:56:33,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 27 [2023-02-18 15:56:33,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211125149] [2023-02-18 15:56:33,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:56:33,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-18 15:56:33,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:56:33,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-18 15:56:33,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=508, Unknown=0, NotChecked=0, Total=702 [2023-02-18 15:56:33,540 INFO L87 Difference]: Start difference. First operand 113 states and 158 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 15:56:40,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:56:40,876 INFO L93 Difference]: Finished difference Result 739 states and 1100 transitions. [2023-02-18 15:56:40,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-18 15:56:40,876 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 22 [2023-02-18 15:56:40,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:56:40,878 INFO L225 Difference]: With dead ends: 739 [2023-02-18 15:56:40,878 INFO L226 Difference]: Without dead ends: 719 [2023-02-18 15:56:40,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 12 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=811, Invalid=1541, Unknown=0, NotChecked=0, Total=2352 [2023-02-18 15:56:40,879 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 1312 mSDsluCounter, 1242 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 420 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1312 SdHoareTripleChecker+Valid, 1342 SdHoareTripleChecker+Invalid, 1115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 420 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-02-18 15:56:40,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1312 Valid, 1342 Invalid, 1115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [420 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-02-18 15:56:40,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2023-02-18 15:56:40,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 173. [2023-02-18 15:56:40,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.4069767441860466) internal successors, (242), 172 states have internal predecessors, (242), 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 15:56:40,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 242 transitions. [2023-02-18 15:56:40,907 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 242 transitions. Word has length 22 [2023-02-18 15:56:40,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:56:40,907 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 242 transitions. [2023-02-18 15:56:40,907 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 15:56:40,907 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 242 transitions. [2023-02-18 15:56:40,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-18 15:56:40,908 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:56:40,908 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:56:40,913 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-02-18 15:56:41,112 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,SelfDestructingSolverStorable16 [2023-02-18 15:56:41,113 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:56:41,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:56:41,113 INFO L85 PathProgramCache]: Analyzing trace with hash -641798784, now seen corresponding path program 2 times [2023-02-18 15:56:41,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:56:41,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781027841] [2023-02-18 15:56:41,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:56:41,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:56:41,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:56:41,218 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-18 15:56:41,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:56:41,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781027841] [2023-02-18 15:56:41,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781027841] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:56:41,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222233006] [2023-02-18 15:56:41,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 15:56:41,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:56:41,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:56:41,222 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 15:56:41,261 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 15:56:41,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 15:56:41,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:56:41,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-18 15:56:41,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:56:41,326 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-18 15:56:41,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:56:41,328 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-18 15:56:41,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222233006] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:56:41,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:56:41,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 15 [2023-02-18 15:56:41,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595783869] [2023-02-18 15:56:41,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:56:41,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-18 15:56:41,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:56:41,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-18 15:56:41,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2023-02-18 15:56:41,329 INFO L87 Difference]: Start difference. First operand 173 states and 242 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 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 15:56:42,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:56:42,061 INFO L93 Difference]: Finished difference Result 375 states and 463 transitions. [2023-02-18 15:56:42,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-02-18 15:56:42,062 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 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 15:56:42,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:56:42,063 INFO L225 Difference]: With dead ends: 375 [2023-02-18 15:56:42,063 INFO L226 Difference]: Without dead ends: 359 [2023-02-18 15:56:42,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=2174, Unknown=0, NotChecked=0, Total=2450 [2023-02-18 15:56:42,067 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 277 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 15:56:42,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 526 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 15:56:42,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2023-02-18 15:56:42,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 158. [2023-02-18 15:56:42,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.4203821656050954) internal successors, (223), 157 states have internal predecessors, (223), 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 15:56:42,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 223 transitions. [2023-02-18 15:56:42,094 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 223 transitions. Word has length 23 [2023-02-18 15:56:42,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:56:42,094 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 223 transitions. [2023-02-18 15:56:42,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 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 15:56:42,095 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 223 transitions. [2023-02-18 15:56:42,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-18 15:56:42,095 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:56:42,095 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:56:42,113 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-02-18 15:56:42,300 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,SelfDestructingSolverStorable17 [2023-02-18 15:56:42,300 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:56:42,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:56:42,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1390241056, now seen corresponding path program 4 times [2023-02-18 15:56:42,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:56:42,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044073215] [2023-02-18 15:56:42,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:56:42,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:56:42,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:56:42,432 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:56:42,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:56:42,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044073215] [2023-02-18 15:56:42,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044073215] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:56:42,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651329058] [2023-02-18 15:56:42,433 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 15:56:42,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:56:42,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:56:42,450 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 15:56:42,451 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 15:56:42,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 15:56:42,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:56:42,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-18 15:56:42,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:56:42,549 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 15:56:42,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:56:42,552 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 15:56:42,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651329058] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:56:42,553 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:56:42,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 18 [2023-02-18 15:56:42,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711393528] [2023-02-18 15:56:42,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:56:42,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-18 15:56:42,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:56:42,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-18 15:56:42,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2023-02-18 15:56:42,554 INFO L87 Difference]: Start difference. First operand 158 states and 223 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 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 15:56:44,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:56:44,011 INFO L93 Difference]: Finished difference Result 350 states and 472 transitions. [2023-02-18 15:56:44,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-02-18 15:56:44,012 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 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) Word has length 23 [2023-02-18 15:56:44,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:56:44,013 INFO L225 Difference]: With dead ends: 350 [2023-02-18 15:56:44,013 INFO L226 Difference]: Without dead ends: 336 [2023-02-18 15:56:44,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1930 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=666, Invalid=5814, Unknown=0, NotChecked=0, Total=6480 [2023-02-18 15:56:44,016 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 304 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 1146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-18 15:56:44,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 239 Invalid, 1146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 962 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-18 15:56:44,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2023-02-18 15:56:44,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 191. [2023-02-18 15:56:44,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.4105263157894736) internal successors, (268), 190 states have internal predecessors, (268), 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 15:56:44,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 268 transitions. [2023-02-18 15:56:44,052 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 268 transitions. Word has length 23 [2023-02-18 15:56:44,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:56:44,053 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 268 transitions. [2023-02-18 15:56:44,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 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 15:56:44,053 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 268 transitions. [2023-02-18 15:56:44,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-18 15:56:44,054 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:56:44,054 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:56:44,060 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 15:56:44,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:56:44,256 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:56:44,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:56:44,257 INFO L85 PathProgramCache]: Analyzing trace with hash -703235457, now seen corresponding path program 6 times [2023-02-18 15:56:44,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:56:44,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088080831] [2023-02-18 15:56:44,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:56:44,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:56:44,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:56:44,337 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 15:56:44,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:56:44,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088080831] [2023-02-18 15:56:44,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088080831] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:56:44,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882218728] [2023-02-18 15:56:44,337 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 15:56:44,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:56:44,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:56:44,358 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 15:56:44,359 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 15:56:44,397 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-02-18 15:56:44,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:56:44,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-18 15:56:44,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:56:44,428 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 15:56:44,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:56:44,458 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 15:56:44,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882218728] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:56:44,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:56:44,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2023-02-18 15:56:44,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028131082] [2023-02-18 15:56:44,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:56:44,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 15:56:44,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:56:44,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 15:56:44,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-18 15:56:44,459 INFO L87 Difference]: Start difference. First operand 191 states and 268 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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 15:56:44,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:56:44,575 INFO L93 Difference]: Finished difference Result 261 states and 349 transitions. [2023-02-18 15:56:44,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 15:56:44,577 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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 15:56:44,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:56:44,578 INFO L225 Difference]: With dead ends: 261 [2023-02-18 15:56:44,578 INFO L226 Difference]: Without dead ends: 252 [2023-02-18 15:56:44,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 39 SyntacticMatches, 13 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-02-18 15:56:44,581 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 41 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 15:56:44,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 70 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 15:56:44,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2023-02-18 15:56:44,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 213. [2023-02-18 15:56:44,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.3867924528301887) internal successors, (294), 212 states have internal predecessors, (294), 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 15:56:44,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 294 transitions. [2023-02-18 15:56:44,621 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 294 transitions. Word has length 25 [2023-02-18 15:56:44,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:56:44,621 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 294 transitions. [2023-02-18 15:56:44,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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 15:56:44,622 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 294 transitions. [2023-02-18 15:56:44,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-18 15:56:44,622 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:56:44,622 INFO L195 NwaCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:56:44,627 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 15:56:44,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:56:44,826 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:56:44,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:56:44,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1532557664, now seen corresponding path program 1 times [2023-02-18 15:56:44,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:56:44,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524935104] [2023-02-18 15:56:44,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:56:44,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:56:44,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:56:44,960 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 15:56:44,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:56:44,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524935104] [2023-02-18 15:56:44,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524935104] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:56:44,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840073026] [2023-02-18 15:56:44,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:56:44,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:56:44,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:56:44,962 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 15:56:44,964 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 15:56:44,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:56:45,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-18 15:56:45,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:56:45,098 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 15:56:45,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:56:45,125 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-02-18 15:56:45,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840073026] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-18 15:56:45,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-18 15:56:45,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [16, 16] total 19 [2023-02-18 15:56:45,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594442715] [2023-02-18 15:56:45,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 15:56:45,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 15:56:45,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:56:45,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 15:56:45,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2023-02-18 15:56:45,126 INFO L87 Difference]: Start difference. First operand 213 states and 294 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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 15:56:45,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:56:45,183 INFO L93 Difference]: Finished difference Result 236 states and 320 transitions. [2023-02-18 15:56:45,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 15:56:45,183 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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) Word has length 25 [2023-02-18 15:56:45,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:56:45,184 INFO L225 Difference]: With dead ends: 236 [2023-02-18 15:56:45,184 INFO L226 Difference]: Without dead ends: 224 [2023-02-18 15:56:45,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 13 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2023-02-18 15:56:45,185 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 12 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 15:56:45,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 25 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 15:56:45,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2023-02-18 15:56:45,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 208. [2023-02-18 15:56:45,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 1.3768115942028984) internal successors, (285), 207 states have internal predecessors, (285), 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 15:56:45,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 285 transitions. [2023-02-18 15:56:45,235 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 285 transitions. Word has length 25 [2023-02-18 15:56:45,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:56:45,235 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 285 transitions. [2023-02-18 15:56:45,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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 15:56:45,236 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 285 transitions. [2023-02-18 15:56:45,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-18 15:56:45,236 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:56:45,236 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:56:45,250 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 15:56:45,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:56:45,441 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:56:45,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:56:45,441 INFO L85 PathProgramCache]: Analyzing trace with hash -825436775, now seen corresponding path program 7 times [2023-02-18 15:56:45,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:56:45,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136450581] [2023-02-18 15:56:45,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:56:45,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:56:45,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:56:45,735 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 15:56:45,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:56:45,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136450581] [2023-02-18 15:56:45,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136450581] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:56:45,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084857564] [2023-02-18 15:56:45,736 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 15:56:45,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:56:45,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:56:45,737 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 15:56:45,739 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 15:56:45,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:56:45,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-18 15:56:45,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:56:45,946 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 15:56:45,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:56:46,034 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 15:56:46,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084857564] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:56:46,035 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:56:46,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 19 [2023-02-18 15:56:46,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178072580] [2023-02-18 15:56:46,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:56:46,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-18 15:56:46,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:56:46,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-18 15:56:46,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2023-02-18 15:56:46,036 INFO L87 Difference]: Start difference. First operand 208 states and 285 transitions. Second operand has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:56:46,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:56:46,272 INFO L93 Difference]: Finished difference Result 223 states and 300 transitions. [2023-02-18 15:56:46,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-18 15:56:46,272 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-02-18 15:56:46,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:56:46,273 INFO L225 Difference]: With dead ends: 223 [2023-02-18 15:56:46,273 INFO L226 Difference]: Without dead ends: 195 [2023-02-18 15:56:46,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 39 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-02-18 15:56:46,273 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 3 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 15:56:46,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 97 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 15:56:46,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2023-02-18 15:56:46,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2023-02-18 15:56:46,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.3917525773195876) internal successors, (270), 194 states have internal predecessors, (270), 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 15:56:46,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 270 transitions. [2023-02-18 15:56:46,310 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 270 transitions. Word has length 26 [2023-02-18 15:56:46,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:56:46,310 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 270 transitions. [2023-02-18 15:56:46,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:56:46,310 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 270 transitions. [2023-02-18 15:56:46,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-18 15:56:46,311 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:56:46,311 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:56:46,323 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-02-18 15:56:46,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:56:46,519 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:56:46,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:56:46,520 INFO L85 PathProgramCache]: Analyzing trace with hash -2074329332, now seen corresponding path program 3 times [2023-02-18 15:56:46,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:56:46,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545177842] [2023-02-18 15:56:46,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:56:46,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:56:46,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:56:46,607 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-18 15:56:46,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:56:46,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545177842] [2023-02-18 15:56:46,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545177842] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:56:46,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59295207] [2023-02-18 15:56:46,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 15:56:46,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:56:46,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:56:46,609 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 15:56:46,610 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 15:56:46,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-18 15:56:46,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:56:46,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-18 15:56:46,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:56:46,700 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-18 15:56:46,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:56:46,775 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-18 15:56:46,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59295207] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:56:46,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:56:46,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 23 [2023-02-18 15:56:46,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890644128] [2023-02-18 15:56:46,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:56:46,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-18 15:56:46,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:56:46,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-18 15:56:46,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2023-02-18 15:56:46,777 INFO L87 Difference]: Start difference. First operand 195 states and 270 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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 15:56:49,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:56:49,323 INFO L93 Difference]: Finished difference Result 827 states and 1029 transitions. [2023-02-18 15:56:49,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2023-02-18 15:56:49,323 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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) Word has length 26 [2023-02-18 15:56:49,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:56:49,332 INFO L225 Difference]: With dead ends: 827 [2023-02-18 15:56:49,332 INFO L226 Difference]: Without dead ends: 805 [2023-02-18 15:56:49,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3716 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1414, Invalid=10576, Unknown=0, NotChecked=0, Total=11990 [2023-02-18 15:56:49,335 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 643 mSDsluCounter, 1371 mSDsCounter, 0 mSdLazyCounter, 1815 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 1488 SdHoareTripleChecker+Invalid, 2023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 1815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-18 15:56:49,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [643 Valid, 1488 Invalid, 2023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 1815 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-18 15:56:49,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2023-02-18 15:56:49,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 287. [2023-02-18 15:56:49,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.444055944055944) internal successors, (413), 286 states have internal predecessors, (413), 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 15:56:49,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 413 transitions. [2023-02-18 15:56:49,419 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 413 transitions. Word has length 26 [2023-02-18 15:56:49,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:56:49,420 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 413 transitions. [2023-02-18 15:56:49,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 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 15:56:49,420 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 413 transitions. [2023-02-18 15:56:49,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-18 15:56:49,423 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:56:49,424 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:56:49,432 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 15:56:49,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:56:49,628 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:56:49,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:56:49,629 INFO L85 PathProgramCache]: Analyzing trace with hash -492280992, now seen corresponding path program 4 times [2023-02-18 15:56:49,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:56:49,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422174566] [2023-02-18 15:56:49,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:56:49,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:56:49,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:56:49,782 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-18 15:56:49,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:56:49,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422174566] [2023-02-18 15:56:49,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422174566] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:56:49,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977959664] [2023-02-18 15:56:49,783 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 15:56:49,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:56:49,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:56:49,784 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 15:56:49,813 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 15:56:49,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 15:56:49,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:56:49,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-18 15:56:49,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:56:49,874 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-18 15:56:49,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:56:49,945 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-18 15:56:49,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977959664] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:56:49,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:56:49,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 8] total 21 [2023-02-18 15:56:49,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210960490] [2023-02-18 15:56:49,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:56:49,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-18 15:56:49,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:56:49,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-18 15:56:49,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2023-02-18 15:56:49,947 INFO L87 Difference]: Start difference. First operand 287 states and 413 transitions. Second operand has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 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 15:56:50,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:56:50,610 INFO L93 Difference]: Finished difference Result 483 states and 628 transitions. [2023-02-18 15:56:50,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-02-18 15:56:50,611 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 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 15:56:50,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:56:50,612 INFO L225 Difference]: With dead ends: 483 [2023-02-18 15:56:50,612 INFO L226 Difference]: Without dead ends: 416 [2023-02-18 15:56:50,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 39 SyntacticMatches, 7 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=270, Invalid=1710, Unknown=0, NotChecked=0, Total=1980 [2023-02-18 15:56:50,613 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 131 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 15:56:50,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 641 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 15:56:50,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2023-02-18 15:56:50,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 274. [2023-02-18 15:56:50,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 1.4212454212454213) internal successors, (388), 273 states have internal predecessors, (388), 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 15:56:50,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 388 transitions. [2023-02-18 15:56:50,681 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 388 transitions. Word has length 27 [2023-02-18 15:56:50,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:56:50,681 INFO L495 AbstractCegarLoop]: Abstraction has 274 states and 388 transitions. [2023-02-18 15:56:50,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 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 15:56:50,681 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 388 transitions. [2023-02-18 15:56:50,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-18 15:56:50,682 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:56:50,682 INFO L195 NwaCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:56:50,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-18 15:56:50,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:56:50,885 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:56:50,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:56:50,886 INFO L85 PathProgramCache]: Analyzing trace with hash 839129918, now seen corresponding path program 8 times [2023-02-18 15:56:50,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:56:50,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289689580] [2023-02-18 15:56:50,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:56:50,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:56:50,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:56:51,029 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 15:56:51,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:56:51,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289689580] [2023-02-18 15:56:51,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289689580] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:56:51,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319066891] [2023-02-18 15:56:51,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 15:56:51,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:56:51,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:56:51,031 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 15:56:51,033 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 15:56:51,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 15:56:51,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:56:51,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-18 15:56:51,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:56:51,157 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 15:56:51,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:56:51,424 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 15:56:51,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319066891] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:56:51,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:56:51,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2023-02-18 15:56:51,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78751565] [2023-02-18 15:56:51,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:56:51,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-18 15:56:51,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:56:51,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-18 15:56:51,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=818, Unknown=0, NotChecked=0, Total=1056 [2023-02-18 15:56:51,425 INFO L87 Difference]: Start difference. First operand 274 states and 388 transitions. Second operand has 33 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 15:57:36,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:36,604 INFO L93 Difference]: Finished difference Result 1017 states and 1490 transitions. [2023-02-18 15:57:36,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2023-02-18 15:57:36,604 INFO L78 Accepts]: Start accepts. Automaton has has 33 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) Word has length 27 [2023-02-18 15:57:36,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:36,607 INFO L225 Difference]: With dead ends: 1017 [2023-02-18 15:57:36,607 INFO L226 Difference]: Without dead ends: 970 [2023-02-18 15:57:36,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 25 SyntacticMatches, 14 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7443 ImplicationChecksByTransitivity, 40.3s TimeCoverageRelationStatistics Valid=5281, Invalid=14459, Unknown=0, NotChecked=0, Total=19740 [2023-02-18 15:57:36,610 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 1802 mSDsluCounter, 1395 mSDsCounter, 0 mSdLazyCounter, 1218 mSolverCounterSat, 636 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1802 SdHoareTripleChecker+Valid, 1497 SdHoareTripleChecker+Invalid, 1854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 636 IncrementalHoareTripleChecker+Valid, 1218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:36,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1802 Valid, 1497 Invalid, 1854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [636 Valid, 1218 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2023-02-18 15:57:36,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2023-02-18 15:57:36,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 314. [2023-02-18 15:57:36,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 1.4408945686900958) internal successors, (451), 313 states have internal predecessors, (451), 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 15:57:36,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 451 transitions. [2023-02-18 15:57:36,711 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 451 transitions. Word has length 27 [2023-02-18 15:57:36,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:36,711 INFO L495 AbstractCegarLoop]: Abstraction has 314 states and 451 transitions. [2023-02-18 15:57:36,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 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 15:57:36,711 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 451 transitions. [2023-02-18 15:57:36,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-18 15:57:36,712 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:36,712 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:36,717 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 15:57:36,917 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,SelfDestructingSolverStorable24 [2023-02-18 15:57:36,917 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:36,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:36,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1431503210, now seen corresponding path program 5 times [2023-02-18 15:57:36,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:36,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927947469] [2023-02-18 15:57:36,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:36,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:36,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:37,066 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 15:57:37,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:37,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927947469] [2023-02-18 15:57:37,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927947469] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:57:37,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722120682] [2023-02-18 15:57:37,067 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 15:57:37,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:37,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:57:37,068 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 15:57:37,084 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 15:57:37,154 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-18 15:57:37,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:57:37,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 39 conjunts are in the unsatisfiable core [2023-02-18 15:57:37,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:57:37,281 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 15:57:37,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:57:37,493 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 15:57:37,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722120682] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:57:37,494 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:57:37,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 14] total 34 [2023-02-18 15:57:37,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139035411] [2023-02-18 15:57:37,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:57:37,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-18 15:57:37,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:37,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-18 15:57:37,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=887, Unknown=0, NotChecked=0, Total=1122 [2023-02-18 15:57:37,495 INFO L87 Difference]: Start difference. First operand 314 states and 451 transitions. Second operand has 34 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 states have internal predecessors, (64), 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 15:57:47,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:47,102 INFO L93 Difference]: Finished difference Result 871 states and 1209 transitions. [2023-02-18 15:57:47,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2023-02-18 15:57:47,102 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 states have internal predecessors, (64), 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 28 [2023-02-18 15:57:47,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:47,105 INFO L225 Difference]: With dead ends: 871 [2023-02-18 15:57:47,105 INFO L226 Difference]: Without dead ends: 839 [2023-02-18 15:57:47,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 32 SyntacticMatches, 9 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12299 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=7068, Invalid=24438, Unknown=0, NotChecked=0, Total=31506 [2023-02-18 15:57:47,107 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 702 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 1200 mSolverCounterSat, 372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 702 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 1572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 1200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:47,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [702 Valid, 417 Invalid, 1572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [372 Valid, 1200 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-02-18 15:57:47,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2023-02-18 15:57:47,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 349. [2023-02-18 15:57:47,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 1.4454022988505748) internal successors, (503), 348 states have internal predecessors, (503), 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 15:57:47,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 503 transitions. [2023-02-18 15:57:47,207 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 503 transitions. Word has length 28 [2023-02-18 15:57:47,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:47,207 INFO L495 AbstractCegarLoop]: Abstraction has 349 states and 503 transitions. [2023-02-18 15:57:47,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 states have internal predecessors, (64), 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 15:57:47,208 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 503 transitions. [2023-02-18 15:57:47,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-18 15:57:47,208 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:47,208 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:47,213 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 15:57:47,413 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,SelfDestructingSolverStorable25 [2023-02-18 15:57:47,413 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:47,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:47,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1845062752, now seen corresponding path program 9 times [2023-02-18 15:57:47,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:47,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717251994] [2023-02-18 15:57:47,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:47,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:47,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:47,839 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-18 15:57:47,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:47,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717251994] [2023-02-18 15:57:47,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717251994] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:57:47,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184787024] [2023-02-18 15:57:47,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 15:57:47,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:47,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:57:47,858 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 15:57:47,907 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 15:57:47,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-18 15:57:47,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:57:47,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-18 15:57:47,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:57:48,117 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-18 15:57:48,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:57:48,217 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-18 15:57:48,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184787024] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:57:48,217 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:57:48,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 23 [2023-02-18 15:57:48,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519355774] [2023-02-18 15:57:48,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:57:48,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-18 15:57:48,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:48,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-18 15:57:48,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2023-02-18 15:57:48,218 INFO L87 Difference]: Start difference. First operand 349 states and 503 transitions. Second operand has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 23 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 15:57:48,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:48,523 INFO L93 Difference]: Finished difference Result 358 states and 511 transitions. [2023-02-18 15:57:48,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-18 15:57:48,524 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 23 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) Word has length 31 [2023-02-18 15:57:48,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:48,525 INFO L225 Difference]: With dead ends: 358 [2023-02-18 15:57:48,525 INFO L226 Difference]: Without dead ends: 333 [2023-02-18 15:57:48,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 48 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2023-02-18 15:57:48,526 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 3 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:48,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 97 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 15:57:48,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2023-02-18 15:57:48,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 333. [2023-02-18 15:57:48,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 1.463855421686747) internal successors, (486), 332 states have internal predecessors, (486), 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 15:57:48,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 486 transitions. [2023-02-18 15:57:48,638 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 486 transitions. Word has length 31 [2023-02-18 15:57:48,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:48,638 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 486 transitions. [2023-02-18 15:57:48,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 23 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 15:57:48,639 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 486 transitions. [2023-02-18 15:57:48,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-18 15:57:48,639 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:48,639 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:48,644 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-02-18 15:57:48,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-02-18 15:57:48,844 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:48,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:48,844 INFO L85 PathProgramCache]: Analyzing trace with hash 79133152, now seen corresponding path program 6 times [2023-02-18 15:57:48,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:48,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065889955] [2023-02-18 15:57:48,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:48,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:48,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:49,029 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 15:57:49,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:49,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065889955] [2023-02-18 15:57:49,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065889955] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:57:49,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945990048] [2023-02-18 15:57:49,029 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 15:57:49,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:49,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:57:49,030 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 15:57:49,057 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 15:57:49,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-18 15:57:49,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:57:49,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-18 15:57:49,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:57:49,225 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-18 15:57:49,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:57:49,228 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-18 15:57:49,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945990048] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:57:49,228 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:57:49,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 24 [2023-02-18 15:57:49,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311839685] [2023-02-18 15:57:49,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:57:49,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-18 15:57:49,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:49,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-18 15:57:49,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2023-02-18 15:57:49,230 INFO L87 Difference]: Start difference. First operand 333 states and 486 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 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 15:57:53,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:53,974 INFO L93 Difference]: Finished difference Result 624 states and 851 transitions. [2023-02-18 15:57:53,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2023-02-18 15:57:53,974 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 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 15:57:53,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:53,985 INFO L225 Difference]: With dead ends: 624 [2023-02-18 15:57:53,985 INFO L226 Difference]: Without dead ends: 583 [2023-02-18 15:57:53,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6079 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1325, Invalid=16765, Unknown=0, NotChecked=0, Total=18090 [2023-02-18 15:57:53,987 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 384 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 2044 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 2297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 2044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:53,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [384 Valid, 455 Invalid, 2297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 2044 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-02-18 15:57:53,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2023-02-18 15:57:54,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 369. [2023-02-18 15:57:54,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 1.4293478260869565) internal successors, (526), 368 states have internal predecessors, (526), 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 15:57:54,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 526 transitions. [2023-02-18 15:57:54,101 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 526 transitions. Word has length 31 [2023-02-18 15:57:54,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:54,102 INFO L495 AbstractCegarLoop]: Abstraction has 369 states and 526 transitions. [2023-02-18 15:57:54,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 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 15:57:54,102 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 526 transitions. [2023-02-18 15:57:54,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-18 15:57:54,102 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:54,102 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:54,109 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 15:57:54,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:54,307 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:54,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:54,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1097644464, now seen corresponding path program 7 times [2023-02-18 15:57:54,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:54,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441984282] [2023-02-18 15:57:54,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:54,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:54,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:54,420 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-18 15:57:54,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:54,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441984282] [2023-02-18 15:57:54,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441984282] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:57:54,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413058365] [2023-02-18 15:57:54,421 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 15:57:54,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:54,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:57:54,437 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 15:57:54,438 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 15:57:54,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:54,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-18 15:57:54,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:57:54,540 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-18 15:57:54,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:57:54,710 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-18 15:57:54,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413058365] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:57:54,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:57:54,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 10] total 26 [2023-02-18 15:57:54,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092368650] [2023-02-18 15:57:54,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:57:54,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-18 15:57:54,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:54,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-18 15:57:54,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2023-02-18 15:57:54,712 INFO L87 Difference]: Start difference. First operand 369 states and 526 transitions. Second operand has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 states have internal predecessors, (40), 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 15:57:55,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:55,793 INFO L93 Difference]: Finished difference Result 635 states and 828 transitions. [2023-02-18 15:57:55,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-02-18 15:57:55,793 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 states have internal predecessors, (40), 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 15:57:55,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:55,794 INFO L225 Difference]: With dead ends: 635 [2023-02-18 15:57:55,794 INFO L226 Difference]: Without dead ends: 563 [2023-02-18 15:57:55,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 43 SyntacticMatches, 8 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=376, Invalid=2704, Unknown=0, NotChecked=0, Total=3080 [2023-02-18 15:57:55,796 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 175 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 830 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:55,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 830 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 15:57:55,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2023-02-18 15:57:55,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 351. [2023-02-18 15:57:55,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 1.4057142857142857) internal successors, (492), 350 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 15:57:55,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 492 transitions. [2023-02-18 15:57:55,930 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 492 transitions. Word has length 31 [2023-02-18 15:57:55,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:55,930 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 492 transitions. [2023-02-18 15:57:55,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 states have internal predecessors, (40), 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 15:57:55,930 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 492 transitions. [2023-02-18 15:57:55,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-18 15:57:55,931 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:55,931 INFO L195 NwaCegarLoop]: trace histogram [13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:55,942 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 15:57:56,142 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,SelfDestructingSolverStorable28 [2023-02-18 15:57:56,143 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:56,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:56,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1462675026, now seen corresponding path program 10 times [2023-02-18 15:57:56,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:56,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932488817] [2023-02-18 15:57:56,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:56,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:56,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:56,326 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-18 15:57:56,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:56,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932488817] [2023-02-18 15:57:56,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932488817] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:57:56,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590087295] [2023-02-18 15:57:56,326 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 15:57:56,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:56,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:57:56,336 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 15:57:56,339 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 15:57:56,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 15:57:56,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:57:56,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-18 15:57:56,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:57:56,532 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 15:57:56,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:57:56,568 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-02-18 15:57:56,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590087295] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:57:56,568 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:57:56,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 5] total 25 [2023-02-18 15:57:56,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942862491] [2023-02-18 15:57:56,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:57:56,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-18 15:57:56,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:56,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-18 15:57:56,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2023-02-18 15:57:56,569 INFO L87 Difference]: Start difference. First operand 351 states and 492 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 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 15:57:58,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:58,132 INFO L93 Difference]: Finished difference Result 767 states and 1033 transitions. [2023-02-18 15:57:58,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2023-02-18 15:57:58,133 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 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 15:57:58,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:58,134 INFO L225 Difference]: With dead ends: 767 [2023-02-18 15:57:58,134 INFO L226 Difference]: Without dead ends: 723 [2023-02-18 15:57:58,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 50 SyntacticMatches, 16 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2584 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=569, Invalid=8173, Unknown=0, NotChecked=0, Total=8742 [2023-02-18 15:57:58,135 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 165 mSDsluCounter, 1449 mSDsCounter, 0 mSdLazyCounter, 2219 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1545 SdHoareTripleChecker+Invalid, 2361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 2219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:58,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 1545 Invalid, 2361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 2219 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-18 15:57:58,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2023-02-18 15:57:58,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 378. [2023-02-18 15:57:58,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 1.3978779840848807) internal successors, (527), 377 states have internal predecessors, (527), 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 15:57:58,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 527 transitions. [2023-02-18 15:57:58,259 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 527 transitions. Word has length 31 [2023-02-18 15:57:58,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:58,259 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 527 transitions. [2023-02-18 15:57:58,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 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 15:57:58,259 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 527 transitions. [2023-02-18 15:57:58,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-18 15:57:58,260 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:58,260 INFO L195 NwaCegarLoop]: trace histogram [14, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:58,264 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 15:57:58,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:58,464 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:58,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:58,464 INFO L85 PathProgramCache]: Analyzing trace with hash -45426752, now seen corresponding path program 11 times [2023-02-18 15:57:58,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:58,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029873767] [2023-02-18 15:57:58,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:58,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:58,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:58,662 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-18 15:57:58,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:58,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029873767] [2023-02-18 15:57:58,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029873767] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:57:58,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536960192] [2023-02-18 15:57:58,663 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 15:57:58,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:58,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:57:58,677 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 15:57:58,683 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 15:57:59,234 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-02-18 15:57:59,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:57:59,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 37 conjunts are in the unsatisfiable core [2023-02-18 15:57:59,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:57:59,375 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-18 15:57:59,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:57:59,750 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-18 15:57:59,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536960192] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:57:59,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:57:59,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 39 [2023-02-18 15:57:59,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169554675] [2023-02-18 15:57:59,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:57:59,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-02-18 15:57:59,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:59,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-02-18 15:57:59,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=1170, Unknown=0, NotChecked=0, Total=1482 [2023-02-18 15:57:59,751 INFO L87 Difference]: Start difference. First operand 378 states and 527 transitions. Second operand has 39 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 39 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 16:00:41,324 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 [] [2023-02-18 16:00:54,154 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 16:01:11,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:01:11,400 INFO L93 Difference]: Finished difference Result 1742 states and 2492 transitions. [2023-02-18 16:01:11,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 224 states. [2023-02-18 16:01:11,410 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 39 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 33 [2023-02-18 16:01:11,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:01:11,414 INFO L225 Difference]: With dead ends: 1742 [2023-02-18 16:01:11,414 INFO L226 Difference]: Without dead ends: 1656 [2023-02-18 16:01:11,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 32 SyntacticMatches, 16 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24146 ImplicationChecksByTransitivity, 175.7s TimeCoverageRelationStatistics Valid=13375, Invalid=45430, Unknown=1, NotChecked=0, Total=58806 [2023-02-18 16:01:11,419 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 2964 mSDsluCounter, 1741 mSDsCounter, 0 mSdLazyCounter, 1539 mSolverCounterSat, 1162 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2964 SdHoareTripleChecker+Valid, 1859 SdHoareTripleChecker+Invalid, 2702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1162 IncrementalHoareTripleChecker+Valid, 1539 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.6s IncrementalHoareTripleChecker+Time [2023-02-18 16:01:11,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2964 Valid, 1859 Invalid, 2702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1162 Valid, 1539 Invalid, 1 Unknown, 0 Unchecked, 15.6s Time] [2023-02-18 16:01:11,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1656 states. [2023-02-18 16:01:11,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1656 to 425. [2023-02-18 16:01:11,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 1.4174528301886793) internal successors, (601), 424 states have internal predecessors, (601), 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 16:01:11,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 601 transitions. [2023-02-18 16:01:11,631 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 601 transitions. Word has length 33 [2023-02-18 16:01:11,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:01:11,631 INFO L495 AbstractCegarLoop]: Abstraction has 425 states and 601 transitions. [2023-02-18 16:01:11,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 39 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 16:01:11,631 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 601 transitions. [2023-02-18 16:01:11,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-18 16:01:11,633 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:01:11,633 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:01:11,639 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 16:01:11,839 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,SelfDestructingSolverStorable30 [2023-02-18 16:01:11,839 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:01:11,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:01:11,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1552700359, now seen corresponding path program 12 times [2023-02-18 16:01:11,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:01:11,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731520270] [2023-02-18 16:01:11,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:01:11,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:01:11,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:01:11,982 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-18 16:01:11,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:01:11,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731520270] [2023-02-18 16:01:11,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731520270] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:01:11,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814917378] [2023-02-18 16:01:11,983 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 16:01:11,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:01:11,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:01:11,985 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 16:01:11,987 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 16:01:12,051 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-18 16:01:12,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:01:12,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-18 16:01:12,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:01:12,115 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-18 16:01:12,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:01:12,118 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-18 16:01:12,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814917378] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:01:12,118 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:01:12,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2023-02-18 16:01:12,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107640305] [2023-02-18 16:01:12,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:01:12,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-18 16:01:12,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:01:12,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-18 16:01:12,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2023-02-18 16:01:12,120 INFO L87 Difference]: Start difference. First operand 425 states and 601 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 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 16:01:13,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:01:13,056 INFO L93 Difference]: Finished difference Result 748 states and 1057 transitions. [2023-02-18 16:01:13,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-18 16:01:13,056 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 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 34 [2023-02-18 16:01:13,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:01:13,058 INFO L225 Difference]: With dead ends: 748 [2023-02-18 16:01:13,058 INFO L226 Difference]: Without dead ends: 728 [2023-02-18 16:01:13,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2023-02-18 16:01:13,059 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 321 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 16:01:13,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 178 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 16:01:13,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2023-02-18 16:01:13,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 542. [2023-02-18 16:01:13,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 1.4528650646950092) internal successors, (786), 541 states have internal predecessors, (786), 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 16:01:13,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 786 transitions. [2023-02-18 16:01:13,348 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 786 transitions. Word has length 34 [2023-02-18 16:01:13,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:01:13,349 INFO L495 AbstractCegarLoop]: Abstraction has 542 states and 786 transitions. [2023-02-18 16:01:13,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 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 16:01:13,349 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 786 transitions. [2023-02-18 16:01:13,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-18 16:01:13,350 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:01:13,350 INFO L195 NwaCegarLoop]: trace histogram [9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:01:13,366 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 16:01:13,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:01:13,555 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:01:13,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:01:13,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1335387370, now seen corresponding path program 5 times [2023-02-18 16:01:13,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:01:13,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034511394] [2023-02-18 16:01:13,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:01:13,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:01:13,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:01:13,729 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 16 proven. 56 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-02-18 16:01:13,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:01:13,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034511394] [2023-02-18 16:01:13,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034511394] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:01:13,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862334178] [2023-02-18 16:01:13,730 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 16:01:13,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:01:13,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:01:13,731 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 16:01:13,733 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 16:01:14,510 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-02-18 16:01:14,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:01:14,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 56 conjunts are in the unsatisfiable core [2023-02-18 16:01:14,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:01:14,762 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 16:01:14,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:01:15,163 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-18 16:01:15,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862334178] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:01:15,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:01:15,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 27, 19] total 47 [2023-02-18 16:01:15,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388656661] [2023-02-18 16:01:15,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:01:15,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-02-18 16:01:15,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:01:15,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-02-18 16:01:15,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=453, Invalid=1709, Unknown=0, NotChecked=0, Total=2162 [2023-02-18 16:01:15,164 INFO L87 Difference]: Start difference. First operand 542 states and 786 transitions. Second operand has 47 states, 47 states have (on average 1.553191489361702) internal successors, (73), 47 states have internal predecessors, (73), 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 16:01:21,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:01:21,010 INFO L93 Difference]: Finished difference Result 1207 states and 1580 transitions. [2023-02-18 16:01:21,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2023-02-18 16:01:21,010 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.553191489361702) internal successors, (73), 47 states have internal predecessors, (73), 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 16:01:21,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:01:21,013 INFO L225 Difference]: With dead ends: 1207 [2023-02-18 16:01:21,013 INFO L226 Difference]: Without dead ends: 1146 [2023-02-18 16:01:21,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 28 SyntacticMatches, 11 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4545 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=3446, Invalid=10596, Unknown=0, NotChecked=0, Total=14042 [2023-02-18 16:01:21,015 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 444 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 2124 mSolverCounterSat, 521 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 2645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 521 IncrementalHoareTripleChecker+Valid, 2124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-02-18 16:01:21,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [444 Valid, 524 Invalid, 2645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [521 Valid, 2124 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-02-18 16:01:21,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1146 states. [2023-02-18 16:01:21,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1146 to 565. [2023-02-18 16:01:21,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 564 states have (on average 1.450354609929078) internal successors, (818), 564 states have internal predecessors, (818), 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 16:01:21,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 818 transitions. [2023-02-18 16:01:21,295 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 818 transitions. Word has length 34 [2023-02-18 16:01:21,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:01:21,295 INFO L495 AbstractCegarLoop]: Abstraction has 565 states and 818 transitions. [2023-02-18 16:01:21,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.553191489361702) internal successors, (73), 47 states have internal predecessors, (73), 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 16:01:21,295 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 818 transitions. [2023-02-18 16:01:21,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-18 16:01:21,296 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:01:21,296 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:01:21,302 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-02-18 16:01:21,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:01:21,503 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:01:21,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:01:21,504 INFO L85 PathProgramCache]: Analyzing trace with hash -517721504, now seen corresponding path program 8 times [2023-02-18 16:01:21,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:01:21,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829549192] [2023-02-18 16:01:21,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:01:21,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:01:21,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:01:21,678 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-02-18 16:01:21,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:01:21,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829549192] [2023-02-18 16:01:21,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829549192] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:01:21,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867840014] [2023-02-18 16:01:21,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 16:01:21,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:01:21,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:01:21,699 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 16:01:21,728 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 16:01:21,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 16:01:21,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:01:21,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-18 16:01:21,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:01:21,852 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-02-18 16:01:21,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:01:22,051 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-02-18 16:01:22,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867840014] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:01:22,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:01:22,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 12] total 31 [2023-02-18 16:01:22,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328707603] [2023-02-18 16:01:22,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:01:22,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-18 16:01:22,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:01:22,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-18 16:01:22,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2023-02-18 16:01:22,054 INFO L87 Difference]: Start difference. First operand 565 states and 818 transitions. Second operand has 31 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 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 16:01:24,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:01:24,219 INFO L93 Difference]: Finished difference Result 916 states and 1220 transitions. [2023-02-18 16:01:24,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-02-18 16:01:24,220 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-02-18 16:01:24,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:01:24,222 INFO L225 Difference]: With dead ends: 916 [2023-02-18 16:01:24,222 INFO L226 Difference]: Without dead ends: 815 [2023-02-18 16:01:24,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 47 SyntacticMatches, 9 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=556, Invalid=4700, Unknown=0, NotChecked=0, Total=5256 [2023-02-18 16:01:24,223 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 217 mSDsluCounter, 1093 mSDsCounter, 0 mSdLazyCounter, 1166 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 1166 SdHoareTripleChecker+Invalid, 1279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-18 16:01:24,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 1166 Invalid, 1279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1166 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-18 16:01:24,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2023-02-18 16:01:24,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 542. [2023-02-18 16:01:24,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 1.4306839186691311) internal successors, (774), 541 states have internal predecessors, (774), 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 16:01:24,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 774 transitions. [2023-02-18 16:01:24,472 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 774 transitions. Word has length 35 [2023-02-18 16:01:24,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:01:24,472 INFO L495 AbstractCegarLoop]: Abstraction has 542 states and 774 transitions. [2023-02-18 16:01:24,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 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 16:01:24,472 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 774 transitions. [2023-02-18 16:01:24,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-18 16:01:24,473 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:01:24,473 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:01:24,477 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 16:01:24,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:01:24,675 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:01:24,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:01:24,678 INFO L85 PathProgramCache]: Analyzing trace with hash -633630471, now seen corresponding path program 13 times [2023-02-18 16:01:24,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:01:24,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884689589] [2023-02-18 16:01:24,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:01:24,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:01:24,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:01:25,120 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 16:01:25,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:01:25,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884689589] [2023-02-18 16:01:25,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884689589] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:01:25,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747571270] [2023-02-18 16:01:25,120 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 16:01:25,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:01:25,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:01:25,141 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 16:01:25,169 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 16:01:25,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:01:25,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-18 16:01:25,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:01:25,424 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 16:01:25,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:01:25,602 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 16:01:25,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747571270] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:01:25,602 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:01:25,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 27 [2023-02-18 16:01:25,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489891966] [2023-02-18 16:01:25,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:01:25,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-18 16:01:25,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:01:25,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-18 16:01:25,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2023-02-18 16:01:25,604 INFO L87 Difference]: Start difference. First operand 542 states and 774 transitions. Second operand has 27 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 27 states have internal predecessors, (90), 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 16:01:26,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:01:26,210 INFO L93 Difference]: Finished difference Result 552 states and 783 transitions. [2023-02-18 16:01:26,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-18 16:01:26,211 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 27 states have internal predecessors, (90), 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 36 [2023-02-18 16:01:26,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:01:26,213 INFO L225 Difference]: With dead ends: 552 [2023-02-18 16:01:26,213 INFO L226 Difference]: Without dead ends: 523 [2023-02-18 16:01:26,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 53 SyntacticMatches, 17 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2023-02-18 16:01:26,213 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 3 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 16:01:26,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 105 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 16:01:26,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2023-02-18 16:01:26,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 523. [2023-02-18 16:01:26,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 522 states have (on average 1.4444444444444444) internal successors, (754), 522 states have internal predecessors, (754), 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 16:01:26,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 754 transitions. [2023-02-18 16:01:26,473 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 754 transitions. Word has length 36 [2023-02-18 16:01:26,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:01:26,474 INFO L495 AbstractCegarLoop]: Abstraction has 523 states and 754 transitions. [2023-02-18 16:01:26,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 27 states have internal predecessors, (90), 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 16:01:26,474 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 754 transitions. [2023-02-18 16:01:26,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-18 16:01:26,475 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:01:26,475 INFO L195 NwaCegarLoop]: trace histogram [15, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:01:26,479 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 16:01:26,678 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,SelfDestructingSolverStorable34 [2023-02-18 16:01:26,679 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:01:26,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:01:26,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1063907961, now seen corresponding path program 14 times [2023-02-18 16:01:26,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:01:26,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901200497] [2023-02-18 16:01:26,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:01:26,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:01:26,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:01:26,931 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-18 16:01:26,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:01:26,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901200497] [2023-02-18 16:01:26,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901200497] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:01:26,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048342196] [2023-02-18 16:01:26,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 16:01:26,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:01:26,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:01:26,933 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 16:01:26,966 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 16:01:26,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 16:01:26,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:01:26,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-18 16:01:26,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:01:27,203 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 16:01:27,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:01:27,283 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2023-02-18 16:01:27,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048342196] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:01:27,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:01:27,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 6] total 27 [2023-02-18 16:01:27,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299236652] [2023-02-18 16:01:27,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:01:27,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-18 16:01:27,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:01:27,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-18 16:01:27,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2023-02-18 16:01:27,284 INFO L87 Difference]: Start difference. First operand 523 states and 754 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 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 16:01:30,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:01:30,778 INFO L93 Difference]: Finished difference Result 1126 states and 1545 transitions. [2023-02-18 16:01:30,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2023-02-18 16:01:30,778 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 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 36 [2023-02-18 16:01:30,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:01:30,781 INFO L225 Difference]: With dead ends: 1126 [2023-02-18 16:01:30,781 INFO L226 Difference]: Without dead ends: 1063 [2023-02-18 16:01:30,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 58 SyntacticMatches, 21 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6343 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1106, Invalid=18076, Unknown=0, NotChecked=0, Total=19182 [2023-02-18 16:01:30,783 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 231 mSDsluCounter, 1712 mSDsCounter, 0 mSdLazyCounter, 3299 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 1821 SdHoareTripleChecker+Invalid, 3499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 3299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-18 16:01:30,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 1821 Invalid, 3499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 3299 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-18 16:01:30,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1063 states. [2023-02-18 16:01:31,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1063 to 542. [2023-02-18 16:01:31,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 1.4417744916820703) internal successors, (780), 541 states have internal predecessors, (780), 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 16:01:31,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 780 transitions. [2023-02-18 16:01:31,095 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 780 transitions. Word has length 36 [2023-02-18 16:01:31,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:01:31,096 INFO L495 AbstractCegarLoop]: Abstraction has 542 states and 780 transitions. [2023-02-18 16:01:31,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 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 16:01:31,096 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 780 transitions. [2023-02-18 16:01:31,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-18 16:01:31,097 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:01:31,097 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:01:31,101 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-02-18 16:01:31,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-02-18 16:01:31,302 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:01:31,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:01:31,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1626991200, now seen corresponding path program 6 times [2023-02-18 16:01:31,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:01:31,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300417780] [2023-02-18 16:01:31,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:01:31,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:01:31,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:01:31,533 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 18 proven. 72 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-02-18 16:01:31,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:01:31,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300417780] [2023-02-18 16:01:31,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300417780] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:01:31,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008730625] [2023-02-18 16:01:31,534 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 16:01:31,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:01:31,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:01:31,535 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 16:01:31,537 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 16:01:31,642 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-02-18 16:01:31,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:01:31,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 54 conjunts are in the unsatisfiable core [2023-02-18 16:01:31,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:01:31,848 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 18 proven. 72 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-02-18 16:01:31,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:01:32,233 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 18 proven. 72 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-02-18 16:01:32,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008730625] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:01:32,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:01:32,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 47 [2023-02-18 16:01:32,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374219491] [2023-02-18 16:01:32,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:01:32,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-02-18 16:01:32,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:01:32,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-02-18 16:01:32,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=1810, Unknown=0, NotChecked=0, Total=2162 [2023-02-18 16:01:32,235 INFO L87 Difference]: Start difference. First operand 542 states and 780 transitions. Second operand has 47 states, 47 states have (on average 1.3617021276595744) internal successors, (64), 47 states have internal predecessors, (64), 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 16:01:55,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:01:55,676 INFO L93 Difference]: Finished difference Result 1508 states and 2026 transitions. [2023-02-18 16:01:55,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 218 states. [2023-02-18 16:01:55,677 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.3617021276595744) internal successors, (64), 47 states have internal predecessors, (64), 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 37 [2023-02-18 16:01:55,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:01:55,680 INFO L225 Difference]: With dead ends: 1508 [2023-02-18 16:01:55,680 INFO L226 Difference]: Without dead ends: 1437 [2023-02-18 16:01:55,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 47 SyntacticMatches, 8 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16782 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=6367, Invalid=40939, Unknown=0, NotChecked=0, Total=47306 [2023-02-18 16:01:55,682 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 1105 mSDsluCounter, 915 mSDsCounter, 0 mSdLazyCounter, 2832 mSolverCounterSat, 829 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1105 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 3661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 829 IncrementalHoareTripleChecker+Valid, 2832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2023-02-18 16:01:55,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1105 Valid, 965 Invalid, 3661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [829 Valid, 2832 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2023-02-18 16:01:55,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1437 states. [2023-02-18 16:01:56,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1437 to 645. [2023-02-18 16:01:56,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 1.4456521739130435) internal successors, (931), 644 states have internal predecessors, (931), 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 16:01:56,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 931 transitions. [2023-02-18 16:01:56,072 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 931 transitions. Word has length 37 [2023-02-18 16:01:56,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:01:56,072 INFO L495 AbstractCegarLoop]: Abstraction has 645 states and 931 transitions. [2023-02-18 16:01:56,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.3617021276595744) internal successors, (64), 47 states have internal predecessors, (64), 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 16:01:56,072 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 931 transitions. [2023-02-18 16:01:56,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-18 16:01:56,073 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:01:56,073 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:01:56,078 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-02-18 16:01:56,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:01:56,278 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:01:56,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:01:56,279 INFO L85 PathProgramCache]: Analyzing trace with hash 289258538, now seen corresponding path program 7 times [2023-02-18 16:01:56,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:01:56,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459431514] [2023-02-18 16:01:56,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:01:56,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:01:56,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:01:56,553 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 16:01:56,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:01:56,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459431514] [2023-02-18 16:01:56,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459431514] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:01:56,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155681582] [2023-02-18 16:01:56,553 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 16:01:56,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:01:56,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:01:56,557 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:01:56,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-02-18 16:01:56,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:01:56,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-18 16:01:56,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:01:56,827 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-18 16:01:56,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:01:56,831 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-18 16:01:56,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155681582] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:01:56,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:01:56,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12, 12] total 33 [2023-02-18 16:01:56,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225188105] [2023-02-18 16:01:56,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:01:56,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-18 16:01:56,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:01:56,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-18 16:01:56,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=992, Unknown=0, NotChecked=0, Total=1056 [2023-02-18 16:01:56,847 INFO L87 Difference]: Start difference. First operand 645 states and 931 transitions. Second operand has 33 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 33 states have internal predecessors, (64), 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 16:03:14,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:03:14,308 INFO L93 Difference]: Finished difference Result 1332 states and 1763 transitions. [2023-02-18 16:03:14,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 322 states. [2023-02-18 16:03:14,309 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 33 states have internal predecessors, (64), 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 38 [2023-02-18 16:03:14,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:03:14,312 INFO L225 Difference]: With dead ends: 1332 [2023-02-18 16:03:14,312 INFO L226 Difference]: Without dead ends: 1254 [2023-02-18 16:03:14,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 348 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49960 ImplicationChecksByTransitivity, 64.1s TimeCoverageRelationStatistics Valid=6253, Invalid=115897, Unknown=0, NotChecked=0, Total=122150 [2023-02-18 16:03:14,322 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 1063 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 6049 mSolverCounterSat, 766 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1063 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 6815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 766 IncrementalHoareTripleChecker+Valid, 6049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2023-02-18 16:03:14,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1063 Valid, 689 Invalid, 6815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [766 Valid, 6049 Invalid, 0 Unknown, 0 Unchecked, 12.7s Time] [2023-02-18 16:03:14,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1254 states. [2023-02-18 16:03:14,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1254 to 613. [2023-02-18 16:03:14,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 612 states have (on average 1.423202614379085) internal successors, (871), 612 states have internal predecessors, (871), 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 16:03:14,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 871 transitions. [2023-02-18 16:03:14,700 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 871 transitions. Word has length 38 [2023-02-18 16:03:14,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:03:14,700 INFO L495 AbstractCegarLoop]: Abstraction has 613 states and 871 transitions. [2023-02-18 16:03:14,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 33 states have internal predecessors, (64), 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 16:03:14,700 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 871 transitions. [2023-02-18 16:03:14,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-18 16:03:14,701 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:03:14,701 INFO L195 NwaCegarLoop]: trace histogram [16, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:03:14,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-02-18 16:03:14,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-02-18 16:03:14,906 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:03:14,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:03:14,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1394918187, now seen corresponding path program 15 times [2023-02-18 16:03:14,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:03:14,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84135878] [2023-02-18 16:03:14,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:03:14,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:03:14,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:03:15,150 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 16:03:15,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:03:15,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84135878] [2023-02-18 16:03:15,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84135878] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:03:15,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245287469] [2023-02-18 16:03:15,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 16:03:15,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:03:15,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:03:15,151 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:03:15,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-02-18 16:03:15,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-18 16:03:15,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:03:15,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-18 16:03:15,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:03:15,278 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-02-18 16:03:15,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:03:15,279 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-02-18 16:03:15,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245287469] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:03:15,280 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:03:15,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 6, 6] total 27 [2023-02-18 16:03:15,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487123053] [2023-02-18 16:03:15,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:03:15,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-18 16:03:15,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:03:15,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-18 16:03:15,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2023-02-18 16:03:15,281 INFO L87 Difference]: Start difference. First operand 613 states and 871 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 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 16:03:18,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:03:18,878 INFO L93 Difference]: Finished difference Result 1202 states and 1618 transitions. [2023-02-18 16:03:18,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2023-02-18 16:03:18,879 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 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 38 [2023-02-18 16:03:18,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:03:18,881 INFO L225 Difference]: With dead ends: 1202 [2023-02-18 16:03:18,881 INFO L226 Difference]: Without dead ends: 1115 [2023-02-18 16:03:18,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6443 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1086, Invalid=18654, Unknown=0, NotChecked=0, Total=19740 [2023-02-18 16:03:18,883 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 238 mSDsluCounter, 2096 mSDsCounter, 0 mSdLazyCounter, 3113 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 2207 SdHoareTripleChecker+Invalid, 3358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 3113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-18 16:03:18,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 2207 Invalid, 3358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 3113 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-18 16:03:18,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2023-02-18 16:03:19,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 594. [2023-02-18 16:03:19,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 593 states have (on average 1.4064080944350759) internal successors, (834), 593 states have internal predecessors, (834), 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 16:03:19,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 834 transitions. [2023-02-18 16:03:19,248 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 834 transitions. Word has length 38 [2023-02-18 16:03:19,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:03:19,248 INFO L495 AbstractCegarLoop]: Abstraction has 594 states and 834 transitions. [2023-02-18 16:03:19,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 27 states have internal predecessors, (49), 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 16:03:19,249 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 834 transitions. [2023-02-18 16:03:19,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-18 16:03:19,249 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:03:19,250 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:03:19,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-02-18 16:03:19,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-02-18 16:03:19,454 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:03:19,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:03:19,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1893430144, now seen corresponding path program 16 times [2023-02-18 16:03:19,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:03:19,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61310311] [2023-02-18 16:03:19,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:03:19,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:03:19,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:03:19,828 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-02-18 16:03:19,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:03:19,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61310311] [2023-02-18 16:03:19,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61310311] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:03:19,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832631314] [2023-02-18 16:03:19,829 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 16:03:19,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:03:19,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:03:19,830 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:03:19,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-02-18 16:03:19,875 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 16:03:19,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:03:19,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-18 16:03:19,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:03:20,014 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-02-18 16:03:20,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:03:20,105 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-02-18 16:03:20,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832631314] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:03:20,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:03:20,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 21 [2023-02-18 16:03:20,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678023846] [2023-02-18 16:03:20,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:03:20,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-18 16:03:20,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:03:20,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-18 16:03:20,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2023-02-18 16:03:20,107 INFO L87 Difference]: Start difference. First operand 594 states and 834 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 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 16:03:22,160 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 16:03:24,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 16:03:26,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 16:03:30,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:03:30,958 INFO L93 Difference]: Finished difference Result 1249 states and 1790 transitions. [2023-02-18 16:03:30,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-02-18 16:03:30,958 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 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 39 [2023-02-18 16:03:30,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:03:30,961 INFO L225 Difference]: With dead ends: 1249 [2023-02-18 16:03:30,961 INFO L226 Difference]: Without dead ends: 1224 [2023-02-18 16:03:30,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 63 SyntacticMatches, 17 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 908 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=734, Invalid=1918, Unknown=0, NotChecked=0, Total=2652 [2023-02-18 16:03:30,962 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 513 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 250 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2023-02-18 16:03:30,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [513 Valid, 314 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 273 Invalid, 2 Unknown, 0 Unchecked, 8.1s Time] [2023-02-18 16:03:30,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1224 states. [2023-02-18 16:03:31,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1224 to 794. [2023-02-18 16:03:31,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 793 states have (on average 1.455233291298865) internal successors, (1154), 793 states have internal predecessors, (1154), 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 16:03:31,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1154 transitions. [2023-02-18 16:03:31,597 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1154 transitions. Word has length 39 [2023-02-18 16:03:31,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:03:31,598 INFO L495 AbstractCegarLoop]: Abstraction has 794 states and 1154 transitions. [2023-02-18 16:03:31,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 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 16:03:31,598 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1154 transitions. [2023-02-18 16:03:31,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-18 16:03:31,605 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:03:31,605 INFO L195 NwaCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:03:31,609 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-02-18 16:03:31,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-02-18 16:03:31,809 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:03:31,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:03:31,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1568606880, now seen corresponding path program 4 times [2023-02-18 16:03:31,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:03:31,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950186947] [2023-02-18 16:03:31,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:03:31,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:03:31,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:03:32,270 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 16:03:32,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:03:32,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950186947] [2023-02-18 16:03:32,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950186947] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:03:32,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656342504] [2023-02-18 16:03:32,271 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 16:03:32,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:03:32,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:03:32,281 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:03:32,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-02-18 16:03:32,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 16:03:32,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:03:32,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 61 conjunts are in the unsatisfiable core [2023-02-18 16:03:32,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:03:32,733 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 16:03:32,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:03:33,914 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 16:03:33,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656342504] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:03:33,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:03:33,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 63 [2023-02-18 16:03:33,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520431141] [2023-02-18 16:03:33,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:03:33,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-02-18 16:03:33,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:03:33,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-02-18 16:03:33,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=966, Invalid=2940, Unknown=0, NotChecked=0, Total=3906 [2023-02-18 16:03:33,916 INFO L87 Difference]: Start difference. First operand 794 states and 1154 transitions. Second operand has 63 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 63 states have internal predecessors, (73), 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 16:03:37,612 WARN L837 $PredicateComparison]: unable to prove that (and (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 27) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 22) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 20) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 19) 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| 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| 13) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 15) 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| 24) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 23) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 26) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 28) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 8) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 16) 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| 14) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 25) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 11) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 18) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 21) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 2) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 17) 4294967296) 0)) is different from false [2023-02-18 16:03:39,711 WARN L837 $PredicateComparison]: unable to prove that (and (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 27) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 22) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 20) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 19) 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| 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| 13) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 15) 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| 24) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 23) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 26) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 8) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 16) 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| 14) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 25) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 11) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 18) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 21) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 2) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 17) 4294967296) 0)) is different from false [2023-02-18 16:03:41,873 WARN L837 $PredicateComparison]: unable to prove that (and (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 22) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 20) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 19) 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| 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| 13) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 15) 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| 24) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 23) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 26) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 8) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 16) 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| 14) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 25) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 11) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 18) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 21) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 2) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 17) 4294967296) 0)) is different from false [2023-02-18 16:03:43,975 WARN L837 $PredicateComparison]: unable to prove that (and (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 22) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 20) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 19) 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| 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| 13) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 15) 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| 24) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 23) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 8) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 16) 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| 14) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 25) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 11) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 18) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 21) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 2) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 17) 4294967296) 0)) is different from false [2023-02-18 16:03:46,071 WARN L837 $PredicateComparison]: unable to prove that (and (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 22) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 20) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 19) 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| 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| 13) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 15) 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| 24) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 23) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 8) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 16) 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| 14) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 11) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 18) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 21) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 2) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 17) 4294967296) 0)) is different from false [2023-02-18 16:04:14,363 WARN L837 $PredicateComparison]: unable to prove that (and (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 27) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 22) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 20) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 19) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 7) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 9) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 6) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 1) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 10) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 13) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 15) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 3) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 24) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 23) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 26) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 28) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 8) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 16) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 12) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 5) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 14) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 25) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 11) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 18) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 21) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 2) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 17) 4294967296) 0)) is different from false [2023-02-18 16:04:15,540 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 16:04:18,640 WARN L837 $PredicateComparison]: unable to prove that (and (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 22) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 8) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 20) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 19) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 7) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 16) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 9) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 12) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 5) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 6) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 14) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 1) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 10) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 11) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 18) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 21) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 13) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 15) 4294967296) 0) (> (mod |c_ULTIMATE.start_main_~y~0#1| 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 3) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 2) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 17) 4294967296) 0)) is different from false [2023-02-18 16:04:19,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 16:04:22,096 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 16:09:12,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 16:09:13,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-18 16:09:15,838 WARN L837 $PredicateComparison]: unable to prove that (and (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 22) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 8) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 20) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 19) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 7) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 16) 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| 14) 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| 18) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 21) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 13) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 15) 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| 2) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 17) 4294967296) 0)) is different from false [2023-02-18 16:09:18,043 WARN L837 $PredicateComparison]: unable to prove that (and (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 8) 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| 16) 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| 14) 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| 18) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 13) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 15) 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| 2) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 17) 4294967296) 0)) is different from false [2023-02-18 16:10:43,758 WARN L837 $PredicateComparison]: unable to prove that (and (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 22) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 20) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 19) 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| 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| 13) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 15) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 3) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 24) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 23) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 26) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 8) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 16) 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| 14) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 25) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 11) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 18) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 21) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 2) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 17) 4294967296) 0)) is different from false [2023-02-18 16:10:46,176 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| 20) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 19) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 7) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 16) 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| 14) 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| 18) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 13) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 15) 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| 2) 4294967296) 0) (> (mod (+ |c_ULTIMATE.start_main_~y~0#1| 17) 4294967296) 0)) is different from false