./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/in-de62.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-de62.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 de9532d8dfc4a0a0cd7c7b5fdf45ac6c04e52382fa165e3cc41d86867bc75adf --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 15:57:26,323 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 15:57:26,325 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 15:57:26,347 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 15:57:26,349 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 15:57:26,357 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 15:57:26,358 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 15:57:26,359 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 15:57:26,360 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 15:57:26,360 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 15:57:26,361 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 15:57:26,362 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 15:57:26,362 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 15:57:26,362 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 15:57:26,363 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 15:57:26,364 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 15:57:26,364 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 15:57:26,365 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 15:57:26,366 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 15:57:26,367 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 15:57:26,368 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 15:57:26,386 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 15:57:26,388 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 15:57:26,390 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 15:57:26,395 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 15:57:26,402 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 15:57:26,402 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 15:57:26,402 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 15:57:26,404 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 15:57:26,404 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 15:57:26,404 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 15:57:26,405 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 15:57:26,405 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 15:57:26,406 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 15:57:26,407 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 15:57:26,408 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 15:57:26,408 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 15:57:26,408 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 15:57:26,409 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 15:57:26,410 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 15:57:26,410 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 15:57:26,411 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 15:57:26,433 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 15:57:26,434 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 15:57:26,434 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 15:57:26,434 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 15:57:26,435 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 15:57:26,435 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 15:57:26,436 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 15:57:26,436 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 15:57:26,437 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 15:57:26,437 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 15:57:26,437 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 15:57:26,437 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 15:57:26,438 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 15:57:26,438 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 15:57:26,438 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 15:57:26,438 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 15:57:26,438 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 15:57:26,438 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 15:57:26,438 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 15:57:26,439 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 15:57:26,439 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 15:57:26,439 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 15:57:26,439 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 15:57:26,439 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 15:57:26,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 15:57:26,439 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 15:57:26,440 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 15:57:26,440 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 15:57:26,440 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 15:57:26,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 15:57:26,440 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 15:57:26,440 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 15:57:26,441 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 15:57:26,441 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 15:57:26,441 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 15:57:26,441 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de9532d8dfc4a0a0cd7c7b5fdf45ac6c04e52382fa165e3cc41d86867bc75adf [2023-02-18 15:57:26,605 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 15:57:26,626 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 15:57:26,639 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 15:57:26,640 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 15:57:26,641 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 15:57:26,648 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/in-de62.c [2023-02-18 15:57:27,574 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 15:57:27,733 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 15:57:27,733 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de62.c [2023-02-18 15:57:27,737 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2b158c55/f19d94a8180d4b328a0c6468d2bb0bcd/FLAG327ed5308 [2023-02-18 15:57:27,746 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2b158c55/f19d94a8180d4b328a0c6468d2bb0bcd [2023-02-18 15:57:27,748 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 15:57:27,750 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 15:57:27,751 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 15:57:27,751 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 15:57:27,753 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 15:57:27,754 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 03:57:27" (1/1) ... [2023-02-18 15:57:27,756 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50727b06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:57:27, skipping insertion in model container [2023-02-18 15:57:27,756 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 03:57:27" (1/1) ... [2023-02-18 15:57:27,762 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 15:57:27,775 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 15:57:27,857 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-de62.c[368,381] [2023-02-18 15:57:27,867 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 15:57:27,873 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 15:57:27,880 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-de62.c[368,381] [2023-02-18 15:57:27,883 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 15:57:27,891 INFO L208 MainTranslator]: Completed translation [2023-02-18 15:57:27,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:57:27 WrapperNode [2023-02-18 15:57:27,891 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 15:57:27,892 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 15:57:27,892 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 15:57:27,892 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 15:57:27,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:57:27" (1/1) ... [2023-02-18 15:57:27,900 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:57:27" (1/1) ... [2023-02-18 15:57:27,911 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 85 [2023-02-18 15:57:27,911 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 15:57:27,911 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 15:57:27,912 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 15:57:27,912 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 15:57:27,917 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:57:27" (1/1) ... [2023-02-18 15:57:27,917 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:57:27" (1/1) ... [2023-02-18 15:57:27,918 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:57:27" (1/1) ... [2023-02-18 15:57:27,918 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:57:27" (1/1) ... [2023-02-18 15:57:27,920 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:57:27" (1/1) ... [2023-02-18 15:57:27,922 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:57:27" (1/1) ... [2023-02-18 15:57:27,923 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:57:27" (1/1) ... [2023-02-18 15:57:27,923 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:57:27" (1/1) ... [2023-02-18 15:57:27,924 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 15:57:27,925 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 15:57:27,925 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 15:57:27,925 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 15:57:27,926 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:57:27" (1/1) ... [2023-02-18 15:57:27,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 15:57:27,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:57:27,946 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 15:57:27,948 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 15:57:27,975 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 15:57:27,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 15:57:27,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 15:57:27,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 15:57:28,018 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 15:57:28,020 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 15:57:28,107 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 15:57:28,111 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 15:57:28,111 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2023-02-18 15:57:28,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 03:57:28 BoogieIcfgContainer [2023-02-18 15:57:28,113 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 15:57:28,114 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 15:57:28,114 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 15:57:28,116 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 15:57:28,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 03:57:27" (1/3) ... [2023-02-18 15:57:28,117 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@728c1f94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 03:57:28, skipping insertion in model container [2023-02-18 15:57:28,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:57:27" (2/3) ... [2023-02-18 15:57:28,117 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@728c1f94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 03:57:28, skipping insertion in model container [2023-02-18 15:57:28,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 03:57:28" (3/3) ... [2023-02-18 15:57:28,118 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de62.c [2023-02-18 15:57:28,136 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 15:57:28,137 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 15:57:28,218 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 15:57:28,225 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;@6f482b8e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 15:57:28,225 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 15:57:28,227 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 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 15:57:28,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-18 15:57:28,231 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:28,231 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:28,232 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:28,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:28,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1928996963, now seen corresponding path program 1 times [2023-02-18 15:57:28,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:28,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28037648] [2023-02-18 15:57:28,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:28,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:28,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:28,327 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 15:57:28,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:28,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28037648] [2023-02-18 15:57:28,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28037648] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 15:57:28,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 15:57:28,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 15:57:28,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128000846] [2023-02-18 15:57:28,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 15:57:28,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 15:57:28,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:28,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 15:57:28,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 15:57:28,369 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 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) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 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 15:57:28,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:28,383 INFO L93 Difference]: Finished difference Result 31 states and 53 transitions. [2023-02-18 15:57:28,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 15:57:28,389 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 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 15:57:28,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:28,395 INFO L225 Difference]: With dead ends: 31 [2023-02-18 15:57:28,395 INFO L226 Difference]: Without dead ends: 13 [2023-02-18 15:57:28,397 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 15:57:28,400 INFO L413 NwaCegarLoop]: 22 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, 22 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 15:57:28,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 15:57:28,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-02-18 15:57:28,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-02-18 15:57:28,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 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 15:57:28,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 18 transitions. [2023-02-18 15:57:28,423 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 18 transitions. Word has length 12 [2023-02-18 15:57:28,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:28,424 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 18 transitions. [2023-02-18 15:57:28,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 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 15:57:28,425 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 18 transitions. [2023-02-18 15:57:28,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-18 15:57:28,425 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:28,426 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:28,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 15:57:28,426 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:28,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:28,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1814480359, now seen corresponding path program 1 times [2023-02-18 15:57:28,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:28,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225008002] [2023-02-18 15:57:28,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:28,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:28,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:28,611 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 15:57:28,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:28,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225008002] [2023-02-18 15:57:28,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225008002] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 15:57:28,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 15:57:28,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 15:57:28,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986540258] [2023-02-18 15:57:28,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 15:57:28,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 15:57:28,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:28,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 15:57:28,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 15:57:28,614 INFO L87 Difference]: Start difference. First operand 13 states and 18 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 15:57:28,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:28,659 INFO L93 Difference]: Finished difference Result 27 states and 39 transitions. [2023-02-18 15:57:28,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 15:57:28,659 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 15:57:28,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:28,660 INFO L225 Difference]: With dead ends: 27 [2023-02-18 15:57:28,660 INFO L226 Difference]: Without dead ends: 18 [2023-02-18 15:57:28,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 15:57:28,661 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 2 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:28,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 33 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 15:57:28,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-02-18 15:57:28,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-02-18 15:57:28,665 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 15:57:28,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 26 transitions. [2023-02-18 15:57:28,669 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 26 transitions. Word has length 12 [2023-02-18 15:57:28,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:28,669 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 26 transitions. [2023-02-18 15:57:28,669 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 15:57:28,670 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 26 transitions. [2023-02-18 15:57:28,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-18 15:57:28,671 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:28,671 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:28,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-18 15:57:28,672 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:28,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:28,674 INFO L85 PathProgramCache]: Analyzing trace with hash 415981709, now seen corresponding path program 1 times [2023-02-18 15:57:28,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:28,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456189607] [2023-02-18 15:57:28,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:28,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:28,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:28,716 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 15:57:28,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:28,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456189607] [2023-02-18 15:57:28,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456189607] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 15:57:28,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 15:57:28,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 15:57:28,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419991109] [2023-02-18 15:57:28,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 15:57:28,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 15:57:28,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:28,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 15:57:28,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 15:57:28,718 INFO L87 Difference]: Start difference. First operand 18 states and 26 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:57:28,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:28,740 INFO L93 Difference]: Finished difference Result 41 states and 63 transitions. [2023-02-18 15:57:28,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 15:57:28,740 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-02-18 15:57:28,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:28,741 INFO L225 Difference]: With dead ends: 41 [2023-02-18 15:57:28,742 INFO L226 Difference]: Without dead ends: 28 [2023-02-18 15:57:28,742 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 15:57:28,743 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 9 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:28,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 20 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 15:57:28,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-02-18 15:57:28,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-02-18 15:57:28,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 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 15:57:28,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 41 transitions. [2023-02-18 15:57:28,749 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 41 transitions. Word has length 13 [2023-02-18 15:57:28,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:28,750 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 41 transitions. [2023-02-18 15:57:28,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:57:28,750 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 41 transitions. [2023-02-18 15:57:28,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-18 15:57:28,750 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:28,750 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:28,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-18 15:57:28,751 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:28,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:28,751 INFO L85 PathProgramCache]: Analyzing trace with hash 461234238, now seen corresponding path program 1 times [2023-02-18 15:57:28,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:28,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595659021] [2023-02-18 15:57:28,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:28,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:28,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:28,772 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 15:57:28,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:28,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595659021] [2023-02-18 15:57:28,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595659021] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 15:57:28,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 15:57:28,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 15:57:28,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856252364] [2023-02-18 15:57:28,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 15:57:28,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 15:57:28,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:28,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 15:57:28,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 15:57:28,775 INFO L87 Difference]: Start difference. First operand 28 states and 41 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:57:28,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:28,794 INFO L93 Difference]: Finished difference Result 43 states and 63 transitions. [2023-02-18 15:57:28,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 15:57:28,795 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-02-18 15:57:28,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:28,795 INFO L225 Difference]: With dead ends: 43 [2023-02-18 15:57:28,795 INFO L226 Difference]: Without dead ends: 32 [2023-02-18 15:57:28,796 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 15:57:28,797 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 7 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 22 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 15:57:28,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 22 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 15:57:28,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-18 15:57:28,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-02-18 15:57:28,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 31 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 15:57:28,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2023-02-18 15:57:28,804 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 13 [2023-02-18 15:57:28,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:28,804 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2023-02-18 15:57:28,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:57:28,805 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2023-02-18 15:57:28,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-18 15:57:28,805 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:28,805 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:28,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-18 15:57:28,806 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:28,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:28,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1348188691, now seen corresponding path program 1 times [2023-02-18 15:57:28,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:28,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232290755] [2023-02-18 15:57:28,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:28,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:28,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:28,854 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 15:57:28,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:28,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232290755] [2023-02-18 15:57:28,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232290755] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 15:57:28,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 15:57:28,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 15:57:28,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568393706] [2023-02-18 15:57:28,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 15:57:28,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 15:57:28,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:28,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 15:57:28,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 15:57:28,857 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:57:28,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:28,890 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2023-02-18 15:57:28,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 15:57:28,891 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-18 15:57:28,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:28,892 INFO L225 Difference]: With dead ends: 41 [2023-02-18 15:57:28,892 INFO L226 Difference]: Without dead ends: 28 [2023-02-18 15:57:28,892 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 15:57:28,893 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 1 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:28,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 36 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 15:57:28,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-02-18 15:57:28,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-02-18 15:57:28,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 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 15:57:28,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2023-02-18 15:57:28,899 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2023-02-18 15:57:28,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:28,899 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2023-02-18 15:57:28,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:57:28,899 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2023-02-18 15:57:28,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-18 15:57:28,900 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:28,900 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:28,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-18 15:57:28,900 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:28,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:28,901 INFO L85 PathProgramCache]: Analyzing trace with hash 121782348, now seen corresponding path program 1 times [2023-02-18 15:57:28,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:28,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974428065] [2023-02-18 15:57:28,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:28,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:28,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:28,965 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 15:57:28,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:28,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974428065] [2023-02-18 15:57:28,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974428065] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:57:28,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298996766] [2023-02-18 15:57:28,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:28,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:28,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:57:28,969 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 15:57:29,013 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 15:57:29,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:29,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-18 15:57:29,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:57:29,048 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 15:57:29,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:57:29,080 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 15:57:29,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298996766] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-18 15:57:29,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-18 15:57:29,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 8 [2023-02-18 15:57:29,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912100924] [2023-02-18 15:57:29,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 15:57:29,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 15:57:29,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:29,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 15:57:29,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-18 15:57:29,084 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:57:29,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:29,128 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2023-02-18 15:57:29,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 15:57:29,128 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-18 15:57:29,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:29,129 INFO L225 Difference]: With dead ends: 35 [2023-02-18 15:57:29,129 INFO L226 Difference]: Without dead ends: 25 [2023-02-18 15:57:29,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-18 15:57:29,136 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:29,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 25 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 15:57:29,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-02-18 15:57:29,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-02-18 15:57:29,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 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 15:57:29,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 35 transitions. [2023-02-18 15:57:29,147 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 35 transitions. Word has length 15 [2023-02-18 15:57:29,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:29,148 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 35 transitions. [2023-02-18 15:57:29,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:57:29,148 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 35 transitions. [2023-02-18 15:57:29,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-18 15:57:29,149 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:29,149 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:29,159 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 15:57:29,353 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 15:57:29,354 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:29,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:29,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1019268824, now seen corresponding path program 1 times [2023-02-18 15:57:29,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:29,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4589767] [2023-02-18 15:57:29,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:29,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:29,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:29,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 15:57:29,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:29,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4589767] [2023-02-18 15:57:29,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4589767] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:57:29,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319411390] [2023-02-18 15:57:29,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:29,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:29,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:57:29,408 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 15:57:29,410 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 15:57:29,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:29,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-18 15:57:29,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:57:29,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:57:29,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:57:29,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 15:57:29,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319411390] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:57:29,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:57:29,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 5] total 10 [2023-02-18 15:57:29,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495364034] [2023-02-18 15:57:29,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:57:29,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 15:57:29,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:29,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 15:57:29,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-02-18 15:57:29,507 INFO L87 Difference]: Start difference. First operand 25 states and 35 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 15:57:29,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:29,630 INFO L93 Difference]: Finished difference Result 103 states and 154 transitions. [2023-02-18 15:57:29,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-18 15:57:29,631 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 15:57:29,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:29,635 INFO L225 Difference]: With dead ends: 103 [2023-02-18 15:57:29,636 INFO L226 Difference]: Without dead ends: 86 [2023-02-18 15:57:29,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2023-02-18 15:57:29,637 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 59 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:29,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 74 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 15:57:29,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-02-18 15:57:29,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 53. [2023-02-18 15:57:29,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.5192307692307692) internal successors, (79), 52 states have internal predecessors, (79), 0 states have call successors, (0), 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 15:57:29,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 79 transitions. [2023-02-18 15:57:29,659 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 79 transitions. Word has length 16 [2023-02-18 15:57:29,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:29,660 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 79 transitions. [2023-02-18 15:57:29,660 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 15:57:29,660 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 79 transitions. [2023-02-18 15:57:29,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-18 15:57:29,661 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:29,661 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:29,671 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-18 15:57:29,867 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 15:57:29,867 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:29,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:29,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1475655800, now seen corresponding path program 1 times [2023-02-18 15:57:29,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:29,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303955510] [2023-02-18 15:57:29,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:29,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:29,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:29,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 15:57:29,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:29,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303955510] [2023-02-18 15:57:29,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303955510] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:57:29,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739352086] [2023-02-18 15:57:29,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:29,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:29,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:57:29,914 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 15:57:29,916 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 15:57:29,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:29,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-18 15:57:29,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:57:29,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 15:57:29,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:57:29,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 15:57:29,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739352086] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:57:29,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:57:29,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2023-02-18 15:57:29,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687869941] [2023-02-18 15:57:29,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:57:29,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 15:57:29,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:29,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 15:57:29,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 15:57:29,994 INFO L87 Difference]: Start difference. First operand 53 states and 79 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 15:57:30,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:30,036 INFO L93 Difference]: Finished difference Result 101 states and 144 transitions. [2023-02-18 15:57:30,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 15:57:30,037 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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) Word has length 16 [2023-02-18 15:57:30,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:30,038 INFO L225 Difference]: With dead ends: 101 [2023-02-18 15:57:30,038 INFO L226 Difference]: Without dead ends: 94 [2023-02-18 15:57:30,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 15:57:30,040 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:30,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 15:57:30,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-02-18 15:57:30,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 65. [2023-02-18 15:57:30,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.5) internal successors, (96), 64 states have internal predecessors, (96), 0 states have call successors, (0), 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 15:57:30,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 96 transitions. [2023-02-18 15:57:30,060 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 96 transitions. Word has length 16 [2023-02-18 15:57:30,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:30,060 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 96 transitions. [2023-02-18 15:57:30,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 15:57:30,061 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 96 transitions. [2023-02-18 15:57:30,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-18 15:57:30,064 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:30,064 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:30,069 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 15:57:30,269 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 15:57:30,269 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:30,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:30,270 INFO L85 PathProgramCache]: Analyzing trace with hash 2038983293, now seen corresponding path program 1 times [2023-02-18 15:57:30,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:30,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788789917] [2023-02-18 15:57:30,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:30,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:30,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:30,346 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 15:57:30,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:30,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788789917] [2023-02-18 15:57:30,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788789917] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:57:30,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154281309] [2023-02-18 15:57:30,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:30,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:30,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:57:30,347 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 15:57:30,349 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 15:57:30,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:30,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-18 15:57:30,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:57:30,416 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 15:57:30,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:57:30,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 15:57:30,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154281309] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:57:30,453 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:57:30,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2023-02-18 15:57:30,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5587668] [2023-02-18 15:57:30,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:57:30,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 15:57:30,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:30,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 15:57:30,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-02-18 15:57:30,454 INFO L87 Difference]: Start difference. First operand 65 states and 96 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:57:30,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:30,564 INFO L93 Difference]: Finished difference Result 141 states and 210 transitions. [2023-02-18 15:57:30,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-18 15:57:30,564 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-02-18 15:57:30,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:30,565 INFO L225 Difference]: With dead ends: 141 [2023-02-18 15:57:30,565 INFO L226 Difference]: Without dead ends: 112 [2023-02-18 15:57:30,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2023-02-18 15:57:30,567 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 46 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:30,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 70 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 15:57:30,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-02-18 15:57:30,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 90. [2023-02-18 15:57:30,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.4382022471910112) internal successors, (128), 89 states have internal predecessors, (128), 0 states have call successors, (0), 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 15:57:30,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 128 transitions. [2023-02-18 15:57:30,585 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 128 transitions. Word has length 17 [2023-02-18 15:57:30,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:30,586 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 128 transitions. [2023-02-18 15:57:30,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:57:30,586 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 128 transitions. [2023-02-18 15:57:30,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-18 15:57:30,586 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:30,586 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:30,591 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 15:57:30,791 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 15:57:30,791 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:30,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:30,792 INFO L85 PathProgramCache]: Analyzing trace with hash 188466470, now seen corresponding path program 1 times [2023-02-18 15:57:30,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:30,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048623125] [2023-02-18 15:57:30,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:30,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:30,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:30,921 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 15:57:30,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:30,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048623125] [2023-02-18 15:57:30,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048623125] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:57:30,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713855681] [2023-02-18 15:57:30,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:30,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:30,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:57:30,925 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 15:57:30,927 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 15:57:30,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:30,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-18 15:57:30,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:57:30,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 15:57:30,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:57:31,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 15:57:31,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713855681] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:57:31,012 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:57:31,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2023-02-18 15:57:31,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123515808] [2023-02-18 15:57:31,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:57:31,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 15:57:31,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:31,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 15:57:31,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-18 15:57:31,015 INFO L87 Difference]: Start difference. First operand 90 states and 128 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 15:57:31,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:31,061 INFO L93 Difference]: Finished difference Result 143 states and 207 transitions. [2023-02-18 15:57:31,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 15:57:31,061 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 18 [2023-02-18 15:57:31,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:31,062 INFO L225 Difference]: With dead ends: 143 [2023-02-18 15:57:31,062 INFO L226 Difference]: Without dead ends: 95 [2023-02-18 15:57:31,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 12 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-18 15:57:31,063 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:31,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 64 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 15:57:31,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-02-18 15:57:31,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 75. [2023-02-18 15:57:31,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.472972972972973) internal successors, (109), 74 states have internal predecessors, (109), 0 states have call successors, (0), 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 15:57:31,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 109 transitions. [2023-02-18 15:57:31,076 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 109 transitions. Word has length 18 [2023-02-18 15:57:31,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:31,077 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 109 transitions. [2023-02-18 15:57:31,077 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 15:57:31,077 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 109 transitions. [2023-02-18 15:57:31,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-18 15:57:31,078 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:31,079 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:31,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-18 15:57:31,285 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 15:57:31,285 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:31,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:31,285 INFO L85 PathProgramCache]: Analyzing trace with hash 91906733, now seen corresponding path program 2 times [2023-02-18 15:57:31,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:31,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15420592] [2023-02-18 15:57:31,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:31,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:31,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:31,326 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 15:57:31,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:31,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15420592] [2023-02-18 15:57:31,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15420592] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:57:31,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659803183] [2023-02-18 15:57:31,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 15:57:31,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:31,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:57:31,328 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 15:57:31,358 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 15:57:31,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 15:57:31,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:57:31,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-18 15:57:31,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:57:31,382 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 15:57:31,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:57:31,409 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 15:57:31,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659803183] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:57:31,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:57:31,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-02-18 15:57:31,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012428975] [2023-02-18 15:57:31,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:57:31,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-18 15:57:31,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:31,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-18 15:57:31,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-02-18 15:57:31,411 INFO L87 Difference]: Start difference. First operand 75 states and 109 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 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 15:57:31,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:31,549 INFO L93 Difference]: Finished difference Result 138 states and 198 transitions. [2023-02-18 15:57:31,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-18 15:57:31,549 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 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 19 [2023-02-18 15:57:31,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:31,550 INFO L225 Difference]: With dead ends: 138 [2023-02-18 15:57:31,550 INFO L226 Difference]: Without dead ends: 94 [2023-02-18 15:57:31,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 4 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 15:57:31,550 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 75 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:31,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 73 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 15:57:31,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-02-18 15:57:31,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2023-02-18 15:57:31,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.4927536231884058) internal successors, (103), 69 states have internal predecessors, (103), 0 states have call successors, (0), 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 15:57:31,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 103 transitions. [2023-02-18 15:57:31,560 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 103 transitions. Word has length 19 [2023-02-18 15:57:31,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:31,560 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 103 transitions. [2023-02-18 15:57:31,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 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 15:57:31,560 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 103 transitions. [2023-02-18 15:57:31,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-18 15:57:31,561 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:31,561 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:31,568 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 15:57:31,766 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 15:57:31,766 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:31,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:31,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1779216382, now seen corresponding path program 2 times [2023-02-18 15:57:31,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:31,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675966132] [2023-02-18 15:57:31,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:31,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:31,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:31,821 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 15:57:31,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:31,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675966132] [2023-02-18 15:57:31,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675966132] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:57:31,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740039211] [2023-02-18 15:57:31,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 15:57:31,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:31,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:57:31,823 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 15:57:31,825 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 15:57:31,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 15:57:31,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:57:31,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-18 15:57:31,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:57:31,875 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 15:57:31,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:57:31,877 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 15:57:31,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740039211] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:57:31,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:57:31,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 12 [2023-02-18 15:57:31,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191134514] [2023-02-18 15:57:31,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:57:31,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 15:57:31,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:31,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 15:57:31,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2023-02-18 15:57:31,879 INFO L87 Difference]: Start difference. First operand 70 states and 103 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 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 15:57:32,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:32,194 INFO L93 Difference]: Finished difference Result 186 states and 255 transitions. [2023-02-18 15:57:32,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-18 15:57:32,195 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 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 19 [2023-02-18 15:57:32,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:32,196 INFO L225 Difference]: With dead ends: 186 [2023-02-18 15:57:32,196 INFO L226 Difference]: Without dead ends: 152 [2023-02-18 15:57:32,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2023-02-18 15:57:32,197 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 101 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:32,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 139 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 15:57:32,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-02-18 15:57:32,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 89. [2023-02-18 15:57:32,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.3636363636363635) internal successors, (120), 88 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:57:32,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 120 transitions. [2023-02-18 15:57:32,215 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 120 transitions. Word has length 19 [2023-02-18 15:57:32,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:32,215 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 120 transitions. [2023-02-18 15:57:32,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 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 15:57:32,215 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 120 transitions. [2023-02-18 15:57:32,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-18 15:57:32,215 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:32,215 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:32,222 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 15:57:32,422 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 15:57:32,422 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:32,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:32,422 INFO L85 PathProgramCache]: Analyzing trace with hash 2078405228, now seen corresponding path program 3 times [2023-02-18 15:57:32,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:32,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433457463] [2023-02-18 15:57:32,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:32,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:32,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:32,480 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 15:57:32,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:32,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433457463] [2023-02-18 15:57:32,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433457463] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:57:32,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668513260] [2023-02-18 15:57:32,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 15:57:32,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:32,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:57:32,481 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 15:57:32,483 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 15:57:32,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-18 15:57:32,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:57:32,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-18 15:57:32,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:57:32,550 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-18 15:57:32,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:57:32,567 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-18 15:57:32,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668513260] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:57:32,567 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:57:32,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 14 [2023-02-18 15:57:32,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054044026] [2023-02-18 15:57:32,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:57:32,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 15:57:32,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:32,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 15:57:32,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2023-02-18 15:57:32,568 INFO L87 Difference]: Start difference. First operand 89 states and 120 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:57:32,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:32,935 INFO L93 Difference]: Finished difference Result 208 states and 292 transitions. [2023-02-18 15:57:32,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-18 15:57:32,935 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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 21 [2023-02-18 15:57:32,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:32,936 INFO L225 Difference]: With dead ends: 208 [2023-02-18 15:57:32,936 INFO L226 Difference]: Without dead ends: 141 [2023-02-18 15:57:32,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2023-02-18 15:57:32,937 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 87 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:32,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 182 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 15:57:32,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-02-18 15:57:32,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 85. [2023-02-18 15:57:32,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.4404761904761905) internal successors, (121), 84 states have internal predecessors, (121), 0 states have call successors, (0), 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 15:57:32,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 121 transitions. [2023-02-18 15:57:32,950 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 121 transitions. Word has length 21 [2023-02-18 15:57:32,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:32,950 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 121 transitions. [2023-02-18 15:57:32,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:57:32,950 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 121 transitions. [2023-02-18 15:57:32,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-18 15:57:32,951 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:32,951 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:32,957 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 15:57:33,155 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 15:57:33,155 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:33,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:33,156 INFO L85 PathProgramCache]: Analyzing trace with hash 856330056, now seen corresponding path program 3 times [2023-02-18 15:57:33,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:33,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730298948] [2023-02-18 15:57:33,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:33,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:33,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:33,236 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:57:33,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:33,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730298948] [2023-02-18 15:57:33,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730298948] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:57:33,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146896230] [2023-02-18 15:57:33,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 15:57:33,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:33,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:57:33,238 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 15:57:33,240 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 15:57:33,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-18 15:57:33,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:57:33,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-18 15:57:33,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:57:33,312 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-18 15:57:33,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:57:33,315 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-18 15:57:33,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146896230] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:57:33,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:57:33,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 15 [2023-02-18 15:57:33,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840137616] [2023-02-18 15:57:33,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:57:33,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-18 15:57:33,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:33,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-18 15:57:33,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2023-02-18 15:57:33,316 INFO L87 Difference]: Start difference. First operand 85 states and 121 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:57:33,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:33,971 INFO L93 Difference]: Finished difference Result 242 states and 317 transitions. [2023-02-18 15:57:33,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-02-18 15:57:33,971 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-02-18 15:57:33,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:33,972 INFO L225 Difference]: With dead ends: 242 [2023-02-18 15:57:33,972 INFO L226 Difference]: Without dead ends: 206 [2023-02-18 15:57:33,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=310, Invalid=2446, Unknown=0, NotChecked=0, Total=2756 [2023-02-18 15:57:33,973 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 169 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:33,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 207 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 15:57:33,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2023-02-18 15:57:33,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 106. [2023-02-18 15:57:33,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.3428571428571427) internal successors, (141), 105 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:57:33,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 141 transitions. [2023-02-18 15:57:33,987 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 141 transitions. Word has length 22 [2023-02-18 15:57:33,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:33,987 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 141 transitions. [2023-02-18 15:57:33,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:57:33,987 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 141 transitions. [2023-02-18 15:57:33,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-18 15:57:33,987 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:33,988 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:33,995 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 15:57:34,192 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 15:57:34,192 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:34,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:34,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1537171731, now seen corresponding path program 4 times [2023-02-18 15:57:34,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:34,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130039469] [2023-02-18 15:57:34,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:34,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:34,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:34,260 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-18 15:57:34,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:34,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130039469] [2023-02-18 15:57:34,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130039469] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:57:34,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836043332] [2023-02-18 15:57:34,261 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 15:57:34,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:34,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:57:34,262 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 15:57:34,265 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 15:57:34,292 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 15:57:34,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:57:34,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-18 15:57:34,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:57:34,353 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 15:57:34,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:57:34,408 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-18 15:57:34,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836043332] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:57:34,409 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:57:34,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 7] total 18 [2023-02-18 15:57:34,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886559099] [2023-02-18 15:57:34,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:57:34,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-18 15:57:34,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:34,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-18 15:57:34,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2023-02-18 15:57:34,412 INFO L87 Difference]: Start difference. First operand 106 states and 141 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:57:34,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:34,860 INFO L93 Difference]: Finished difference Result 204 states and 298 transitions. [2023-02-18 15:57:34,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-02-18 15:57:34,861 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-02-18 15:57:34,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:34,861 INFO L225 Difference]: With dead ends: 204 [2023-02-18 15:57:34,861 INFO L226 Difference]: Without dead ends: 168 [2023-02-18 15:57:34,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 32 SyntacticMatches, 7 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=322, Invalid=1318, Unknown=0, NotChecked=0, Total=1640 [2023-02-18 15:57:34,862 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 75 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:34,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 156 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 15:57:34,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-02-18 15:57:34,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 125. [2023-02-18 15:57:34,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.3870967741935485) internal successors, (172), 124 states have internal predecessors, (172), 0 states have call successors, (0), 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 15:57:34,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 172 transitions. [2023-02-18 15:57:34,886 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 172 transitions. Word has length 23 [2023-02-18 15:57:34,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:34,887 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 172 transitions. [2023-02-18 15:57:34,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:57:34,887 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 172 transitions. [2023-02-18 15:57:34,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-18 15:57:34,887 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:34,888 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:34,894 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 15:57:35,092 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 15:57:35,093 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:35,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:35,093 INFO L85 PathProgramCache]: Analyzing trace with hash 257480285, now seen corresponding path program 2 times [2023-02-18 15:57:35,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:35,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674744243] [2023-02-18 15:57:35,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:35,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:35,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:35,155 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 15:57:35,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:35,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674744243] [2023-02-18 15:57:35,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674744243] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:57:35,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932570909] [2023-02-18 15:57:35,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 15:57:35,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:35,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:57:35,157 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 15:57:35,159 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 15:57:35,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 15:57:35,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:57:35,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-18 15:57:35,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:57:35,254 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:57:35,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:57:35,299 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 15:57:35,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932570909] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:57:35,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:57:35,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 7] total 18 [2023-02-18 15:57:35,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982047814] [2023-02-18 15:57:35,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:57:35,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-18 15:57:35,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:35,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-18 15:57:35,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2023-02-18 15:57:35,300 INFO L87 Difference]: Start difference. First operand 125 states and 172 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 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 15:57:35,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:35,515 INFO L93 Difference]: Finished difference Result 313 states and 468 transitions. [2023-02-18 15:57:35,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-18 15:57:35,515 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 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 23 [2023-02-18 15:57:35,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:35,516 INFO L225 Difference]: With dead ends: 313 [2023-02-18 15:57:35,516 INFO L226 Difference]: Without dead ends: 256 [2023-02-18 15:57:35,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 10 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2023-02-18 15:57:35,517 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 94 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:35,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 175 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 15:57:35,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2023-02-18 15:57:35,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 176. [2023-02-18 15:57:35,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.3657142857142857) internal successors, (239), 175 states have internal predecessors, (239), 0 states have call successors, (0), 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 15:57:35,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 239 transitions. [2023-02-18 15:57:35,540 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 239 transitions. Word has length 23 [2023-02-18 15:57:35,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:35,540 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 239 transitions. [2023-02-18 15:57:35,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 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 15:57:35,540 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 239 transitions. [2023-02-18 15:57:35,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-18 15:57:35,541 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:35,541 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:35,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-18 15:57:35,745 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 15:57:35,746 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:35,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:35,746 INFO L85 PathProgramCache]: Analyzing trace with hash -235040834, now seen corresponding path program 4 times [2023-02-18 15:57:35,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:35,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473329350] [2023-02-18 15:57:35,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:35,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:35,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:35,840 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:57:35,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:35,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473329350] [2023-02-18 15:57:35,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473329350] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:57:35,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520682219] [2023-02-18 15:57:35,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 15:57:35,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:35,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:57:35,842 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 15:57:35,844 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 15:57:35,873 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 15:57:35,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:57:35,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-18 15:57:35,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:57:35,936 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-18 15:57:35,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:57:35,938 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-18 15:57:35,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520682219] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:57:35,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:57:35,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 18 [2023-02-18 15:57:35,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504745835] [2023-02-18 15:57:35,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:57:35,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-18 15:57:35,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:35,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-18 15:57:35,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2023-02-18 15:57:35,940 INFO L87 Difference]: Start difference. First operand 176 states and 239 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:57:38,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:38,047 INFO L93 Difference]: Finished difference Result 600 states and 786 transitions. [2023-02-18 15:57:38,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2023-02-18 15:57:38,047 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-02-18 15:57:38,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:38,049 INFO L225 Difference]: With dead ends: 600 [2023-02-18 15:57:38,049 INFO L226 Difference]: Without dead ends: 544 [2023-02-18 15:57:38,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4534 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1023, Invalid=11859, Unknown=0, NotChecked=0, Total=12882 [2023-02-18 15:57:38,053 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 380 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 1160 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 1365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 1160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:38,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 257 Invalid, 1365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 1160 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-18 15:57:38,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2023-02-18 15:57:38,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 200. [2023-02-18 15:57:38,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.3668341708542713) internal successors, (272), 199 states have internal predecessors, (272), 0 states have call successors, (0), 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 15:57:38,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 272 transitions. [2023-02-18 15:57:38,081 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 272 transitions. Word has length 25 [2023-02-18 15:57:38,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:38,082 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 272 transitions. [2023-02-18 15:57:38,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:57:38,082 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 272 transitions. [2023-02-18 15:57:38,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-18 15:57:38,082 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:38,082 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:38,087 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 15:57:38,286 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 15:57:38,287 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:38,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:38,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1883036162, now seen corresponding path program 1 times [2023-02-18 15:57:38,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:38,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20592096] [2023-02-18 15:57:38,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:38,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:38,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:38,369 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-18 15:57:38,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:38,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20592096] [2023-02-18 15:57:38,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20592096] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:57:38,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011554944] [2023-02-18 15:57:38,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:38,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:38,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:57:38,373 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 15:57:38,375 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 15:57:38,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:38,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-18 15:57:38,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:57:38,479 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 15:57:38,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:57:38,546 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-18 15:57:38,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011554944] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:57:38,546 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:57:38,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 8] total 22 [2023-02-18 15:57:38,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480574156] [2023-02-18 15:57:38,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:57:38,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-18 15:57:38,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:38,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-18 15:57:38,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2023-02-18 15:57:38,547 INFO L87 Difference]: Start difference. First operand 200 states and 272 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:57:39,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:39,429 INFO L93 Difference]: Finished difference Result 390 states and 566 transitions. [2023-02-18 15:57:39,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-02-18 15:57:39,430 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-02-18 15:57:39,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:39,432 INFO L225 Difference]: With dead ends: 390 [2023-02-18 15:57:39,439 INFO L226 Difference]: Without dead ends: 298 [2023-02-18 15:57:39,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 32 SyntacticMatches, 9 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 983 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=535, Invalid=3125, Unknown=0, NotChecked=0, Total=3660 [2023-02-18 15:57:39,440 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 89 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:39,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 370 Invalid, 980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 15:57:39,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2023-02-18 15:57:39,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 212. [2023-02-18 15:57:39,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.3649289099526067) internal successors, (288), 211 states have internal predecessors, (288), 0 states have call successors, (0), 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 15:57:39,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 288 transitions. [2023-02-18 15:57:39,483 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 288 transitions. Word has length 25 [2023-02-18 15:57:39,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:39,484 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 288 transitions. [2023-02-18 15:57:39,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:57:39,484 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 288 transitions. [2023-02-18 15:57:39,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-18 15:57:39,484 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:39,484 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:39,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-18 15:57:39,688 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 15:57:39,689 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:39,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:39,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1999602746, now seen corresponding path program 3 times [2023-02-18 15:57:39,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:39,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941820239] [2023-02-18 15:57:39,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:39,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:39,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:39,781 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-18 15:57:39,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:39,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941820239] [2023-02-18 15:57:39,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941820239] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:57:39,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294673227] [2023-02-18 15:57:39,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 15:57:39,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:39,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:57:39,783 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 15:57:39,785 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 15:57:39,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-18 15:57:39,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:57:39,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-18 15:57:39,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:57:39,867 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-18 15:57:39,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:57:39,898 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-18 15:57:39,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294673227] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:57:39,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:57:39,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 12 [2023-02-18 15:57:39,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114892240] [2023-02-18 15:57:39,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:57:39,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 15:57:39,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:39,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 15:57:39,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-02-18 15:57:39,899 INFO L87 Difference]: Start difference. First operand 212 states and 288 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 15:57:40,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:40,152 INFO L93 Difference]: Finished difference Result 426 states and 557 transitions. [2023-02-18 15:57:40,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-18 15:57:40,152 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 26 [2023-02-18 15:57:40,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:40,154 INFO L225 Difference]: With dead ends: 426 [2023-02-18 15:57:40,154 INFO L226 Difference]: Without dead ends: 396 [2023-02-18 15:57:40,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-02-18 15:57:40,154 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 95 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:40,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 123 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 15:57:40,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2023-02-18 15:57:40,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 216. [2023-02-18 15:57:40,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.3534883720930233) internal successors, (291), 215 states have internal predecessors, (291), 0 states have call successors, (0), 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 15:57:40,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 291 transitions. [2023-02-18 15:57:40,195 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 291 transitions. Word has length 26 [2023-02-18 15:57:40,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:40,195 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 291 transitions. [2023-02-18 15:57:40,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 15:57:40,196 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 291 transitions. [2023-02-18 15:57:40,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-18 15:57:40,196 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:40,196 INFO L195 NwaCegarLoop]: trace histogram [7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:40,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-18 15:57:40,401 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 15:57:40,401 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:40,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:40,401 INFO L85 PathProgramCache]: Analyzing trace with hash -866986772, now seen corresponding path program 2 times [2023-02-18 15:57:40,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:40,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135524228] [2023-02-18 15:57:40,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:40,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:40,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:40,494 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-18 15:57:40,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:40,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135524228] [2023-02-18 15:57:40,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135524228] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:57:40,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386949513] [2023-02-18 15:57:40,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 15:57:40,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:40,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:57:40,496 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 15:57:40,498 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 15:57:40,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 15:57:40,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:57:40,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-18 15:57:40,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:57:40,602 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 15:57:40,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:57:40,643 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-18 15:57:40,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386949513] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:57:40,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:57:40,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 6] total 18 [2023-02-18 15:57:40,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230774697] [2023-02-18 15:57:40,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:57:40,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-18 15:57:40,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:40,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-18 15:57:40,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-02-18 15:57:40,644 INFO L87 Difference]: Start difference. First operand 216 states and 291 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:57:41,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:41,052 INFO L93 Difference]: Finished difference Result 476 states and 693 transitions. [2023-02-18 15:57:41,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-18 15:57:41,052 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-18 15:57:41,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:41,054 INFO L225 Difference]: With dead ends: 476 [2023-02-18 15:57:41,054 INFO L226 Difference]: Without dead ends: 425 [2023-02-18 15:57:41,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 39 SyntacticMatches, 13 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=203, Invalid=553, Unknown=0, NotChecked=0, Total=756 [2023-02-18 15:57:41,054 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 146 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:41,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 374 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 15:57:41,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2023-02-18 15:57:41,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 248. [2023-02-18 15:57:41,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.3360323886639676) internal successors, (330), 247 states have internal predecessors, (330), 0 states have call successors, (0), 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 15:57:41,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 330 transitions. [2023-02-18 15:57:41,107 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 330 transitions. Word has length 27 [2023-02-18 15:57:41,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:41,107 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 330 transitions. [2023-02-18 15:57:41,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:57:41,107 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 330 transitions. [2023-02-18 15:57:41,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-18 15:57:41,108 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:41,108 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:41,114 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 15:57:41,312 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 15:57:41,313 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:41,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:41,313 INFO L85 PathProgramCache]: Analyzing trace with hash -18086136, now seen corresponding path program 5 times [2023-02-18 15:57:41,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:41,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299484616] [2023-02-18 15:57:41,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:41,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:41,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:41,453 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:57:41,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:41,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299484616] [2023-02-18 15:57:41,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299484616] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:57:41,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101645874] [2023-02-18 15:57:41,453 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 15:57:41,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:41,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:57:41,457 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 15:57:41,480 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 15:57:41,681 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-18 15:57:41,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:57:41,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-18 15:57:41,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:57:41,756 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-18 15:57:41,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:57:41,770 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-18 15:57:41,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101645874] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:57:41,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:57:41,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 21 [2023-02-18 15:57:41,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628893592] [2023-02-18 15:57:41,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:57:41,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-18 15:57:41,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:41,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-18 15:57:41,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2023-02-18 15:57:41,773 INFO L87 Difference]: Start difference. First operand 248 states and 330 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 15:57:46,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:46,925 INFO L93 Difference]: Finished difference Result 918 states and 1154 transitions. [2023-02-18 15:57:46,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2023-02-18 15:57:46,925 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 28 [2023-02-18 15:57:46,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:46,927 INFO L225 Difference]: With dead ends: 918 [2023-02-18 15:57:46,927 INFO L226 Difference]: Without dead ends: 850 [2023-02-18 15:57:46,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13587 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2191, Invalid=32219, Unknown=0, NotChecked=0, Total=34410 [2023-02-18 15:57:46,933 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 529 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 2209 mSolverCounterSat, 373 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 2582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 373 IncrementalHoareTripleChecker+Valid, 2209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:46,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [529 Valid, 503 Invalid, 2582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [373 Valid, 2209 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-02-18 15:57:46,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2023-02-18 15:57:46,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 298. [2023-02-18 15:57:46,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 1.3265993265993266) internal successors, (394), 297 states have internal predecessors, (394), 0 states have call successors, (0), 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 15:57:46,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 394 transitions. [2023-02-18 15:57:46,999 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 394 transitions. Word has length 28 [2023-02-18 15:57:46,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:46,999 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 394 transitions. [2023-02-18 15:57:47,000 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 15:57:47,000 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 394 transitions. [2023-02-18 15:57:47,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-18 15:57:47,000 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:47,000 INFO L195 NwaCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:47,007 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 15:57:47,205 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 15:57:47,205 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:47,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:47,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1736785494, now seen corresponding path program 5 times [2023-02-18 15:57:47,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:47,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920587613] [2023-02-18 15:57:47,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:47,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:47,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:47,302 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-18 15:57:47,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:47,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920587613] [2023-02-18 15:57:47,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920587613] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:57:47,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021681023] [2023-02-18 15:57:47,303 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 15:57:47,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:47,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:57:47,304 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 15:57:47,321 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 15:57:47,458 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-02-18 15:57:47,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:57:47,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-18 15:57:47,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:57:47,535 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-18 15:57:47,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:57:47,611 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-18 15:57:47,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021681023] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:57:47,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:57:47,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 8] total 23 [2023-02-18 15:57:47,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3917574] [2023-02-18 15:57:47,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:57:47,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-18 15:57:47,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:47,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-18 15:57:47,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2023-02-18 15:57:47,613 INFO L87 Difference]: Start difference. First operand 298 states and 394 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 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 15:57:48,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:48,665 INFO L93 Difference]: Finished difference Result 533 states and 761 transitions. [2023-02-18 15:57:48,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-02-18 15:57:48,666 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 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 28 [2023-02-18 15:57:48,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:48,667 INFO L225 Difference]: With dead ends: 533 [2023-02-18 15:57:48,667 INFO L226 Difference]: Without dead ends: 409 [2023-02-18 15:57:48,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 38 SyntacticMatches, 10 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 825 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=359, Invalid=3181, Unknown=0, NotChecked=0, Total=3540 [2023-02-18 15:57:48,671 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 116 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 1014 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 1130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:48,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 636 Invalid, 1130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1014 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 15:57:48,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2023-02-18 15:57:48,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 309. [2023-02-18 15:57:48,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 1.344155844155844) internal successors, (414), 308 states have internal predecessors, (414), 0 states have call successors, (0), 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 15:57:48,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 414 transitions. [2023-02-18 15:57:48,748 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 414 transitions. Word has length 28 [2023-02-18 15:57:48,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:48,748 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 414 transitions. [2023-02-18 15:57:48,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 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 15:57:48,749 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 414 transitions. [2023-02-18 15:57:48,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-18 15:57:48,750 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:48,750 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:48,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-18 15:57:48,954 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 15:57:48,955 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:48,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:48,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1004492410, now seen corresponding path program 4 times [2023-02-18 15:57:48,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:48,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137656917] [2023-02-18 15:57:48,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:48,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:48,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:49,076 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 15:57:49,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:49,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137656917] [2023-02-18 15:57:49,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137656917] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:57:49,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672684189] [2023-02-18 15:57:49,077 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 15:57:49,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:49,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:57:49,078 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 15:57:49,105 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 15:57:49,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 15:57:49,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:57:49,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-18 15:57:49,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:57:49,184 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 15:57:49,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:57:49,229 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 15:57:49,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672684189] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:57:49,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:57:49,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2023-02-18 15:57:49,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18714431] [2023-02-18 15:57:49,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:57:49,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 15:57:49,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:49,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 15:57:49,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-02-18 15:57:49,230 INFO L87 Difference]: Start difference. First operand 309 states and 414 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:57:49,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:49,463 INFO L93 Difference]: Finished difference Result 493 states and 641 transitions. [2023-02-18 15:57:49,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 15:57:49,464 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-02-18 15:57:49,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:49,465 INFO L225 Difference]: With dead ends: 493 [2023-02-18 15:57:49,465 INFO L226 Difference]: Without dead ends: 409 [2023-02-18 15:57:49,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 40 SyntacticMatches, 28 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-02-18 15:57:49,466 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 19 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:49,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 130 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 15:57:49,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2023-02-18 15:57:49,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 298. [2023-02-18 15:57:49,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 1.3434343434343434) internal successors, (399), 297 states have internal predecessors, (399), 0 states have call successors, (0), 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 15:57:49,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 399 transitions. [2023-02-18 15:57:49,537 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 399 transitions. Word has length 30 [2023-02-18 15:57:49,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:49,538 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 399 transitions. [2023-02-18 15:57:49,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:57:49,538 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 399 transitions. [2023-02-18 15:57:49,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-18 15:57:49,538 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:49,538 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:49,547 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 15:57:49,745 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 15:57:49,745 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:49,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:49,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1769663827, now seen corresponding path program 6 times [2023-02-18 15:57:49,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:49,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086993353] [2023-02-18 15:57:49,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:49,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:49,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:49,853 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-02-18 15:57:49,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:49,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086993353] [2023-02-18 15:57:49,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086993353] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:57:49,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901103390] [2023-02-18 15:57:49,853 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 15:57:49,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:49,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:57:49,854 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 15:57:49,876 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 15:57:49,908 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-18 15:57:49,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:57:49,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-18 15:57:49,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:57:49,988 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-18 15:57:49,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:57:49,990 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-18 15:57:49,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901103390] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:57:49,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:57:49,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 21 [2023-02-18 15:57:49,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347720573] [2023-02-18 15:57:49,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:57:49,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-18 15:57:49,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:49,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-18 15:57:49,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2023-02-18 15:57:49,991 INFO L87 Difference]: Start difference. First operand 298 states and 399 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:57:54,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:57:54,307 INFO L93 Difference]: Finished difference Result 989 states and 1209 transitions. [2023-02-18 15:57:54,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2023-02-18 15:57:54,308 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-02-18 15:57:54,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:57:54,310 INFO L225 Difference]: With dead ends: 989 [2023-02-18 15:57:54,310 INFO L226 Difference]: Without dead ends: 915 [2023-02-18 15:57:54,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10908 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1803, Invalid=26589, Unknown=0, NotChecked=0, Total=28392 [2023-02-18 15:57:54,312 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 435 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 1750 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 1983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 1750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-02-18 15:57:54,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [435 Valid, 586 Invalid, 1983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 1750 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-02-18 15:57:54,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2023-02-18 15:57:54,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 287. [2023-02-18 15:57:54,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.3426573426573427) internal successors, (384), 286 states have internal predecessors, (384), 0 states have call successors, (0), 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 15:57:54,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 384 transitions. [2023-02-18 15:57:54,386 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 384 transitions. Word has length 31 [2023-02-18 15:57:54,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:57:54,386 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 384 transitions. [2023-02-18 15:57:54,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:57:54,386 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 384 transitions. [2023-02-18 15:57:54,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-18 15:57:54,387 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:57:54,387 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:57:54,400 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 15:57:54,594 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 15:57:54,594 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:57:54,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:57:54,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1370456194, now seen corresponding path program 6 times [2023-02-18 15:57:54,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:57:54,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427319736] [2023-02-18 15:57:54,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:57:54,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:57:54,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:57:54,776 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:57:54,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:57:54,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427319736] [2023-02-18 15:57:54,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427319736] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:57:54,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149220927] [2023-02-18 15:57:54,776 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 15:57:54,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:57:54,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:57:54,778 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 15:57:54,782 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 15:57:54,827 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-18 15:57:54,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:57:54,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-18 15:57:54,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:57:54,926 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-18 15:57:54,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:57:54,929 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-18 15:57:54,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149220927] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:57:54,929 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:57:54,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 24 [2023-02-18 15:57:54,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093996510] [2023-02-18 15:57:54,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:57:54,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-18 15:57:54,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:57:54,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-18 15:57:54,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2023-02-18 15:57:54,931 INFO L87 Difference]: Start difference. First operand 287 states and 384 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:58:05,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:58:05,591 INFO L93 Difference]: Finished difference Result 1182 states and 1467 transitions. [2023-02-18 15:58:05,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 250 states. [2023-02-18 15:58:05,591 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-02-18 15:58:05,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:58:05,594 INFO L225 Difference]: With dead ends: 1182 [2023-02-18 15:58:05,594 INFO L226 Difference]: Without dead ends: 1111 [2023-02-18 15:58:05,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28630 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=3703, Invalid=65203, Unknown=0, NotChecked=0, Total=68906 [2023-02-18 15:58:05,597 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 770 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 3085 mSolverCounterSat, 445 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 770 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 3530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 445 IncrementalHoareTripleChecker+Valid, 3085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-02-18 15:58:05,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [770 Valid, 504 Invalid, 3530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [445 Valid, 3085 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-02-18 15:58:05,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2023-02-18 15:58:05,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 350. [2023-02-18 15:58:05,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 1.32378223495702) internal successors, (462), 349 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:58:05,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 462 transitions. [2023-02-18 15:58:05,703 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 462 transitions. Word has length 31 [2023-02-18 15:58:05,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:58:05,703 INFO L495 AbstractCegarLoop]: Abstraction has 350 states and 462 transitions. [2023-02-18 15:58:05,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:58:05,703 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 462 transitions. [2023-02-18 15:58:05,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-18 15:58:05,704 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:58:05,704 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:58:05,714 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 15:58:05,907 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 15:58:05,907 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:58:05,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:58:05,908 INFO L85 PathProgramCache]: Analyzing trace with hash 306595180, now seen corresponding path program 3 times [2023-02-18 15:58:05,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:58:05,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063893254] [2023-02-18 15:58:05,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:58:05,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:58:05,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:58:06,049 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 15:58:06,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:58:06,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063893254] [2023-02-18 15:58:06,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063893254] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:58:06,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965166326] [2023-02-18 15:58:06,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 15:58:06,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:58:06,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:58:06,051 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 15:58:06,053 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 15:58:06,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-18 15:58:06,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:58:06,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-18 15:58:06,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:58:06,193 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-02-18 15:58:06,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:58:06,341 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-02-18 15:58:06,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965166326] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:58:06,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:58:06,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 10] total 29 [2023-02-18 15:58:06,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626160882] [2023-02-18 15:58:06,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:58:06,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-18 15:58:06,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:58:06,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-18 15:58:06,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2023-02-18 15:58:06,343 INFO L87 Difference]: Start difference. First operand 350 states and 462 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:58:08,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:58:08,303 INFO L93 Difference]: Finished difference Result 636 states and 921 transitions. [2023-02-18 15:58:08,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2023-02-18 15:58:08,304 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 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 15:58:08,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:58:08,305 INFO L225 Difference]: With dead ends: 636 [2023-02-18 15:58:08,305 INFO L226 Difference]: Without dead ends: 544 [2023-02-18 15:58:08,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2077 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1042, Invalid=7330, Unknown=0, NotChecked=0, Total=8372 [2023-02-18 15:58:08,306 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 254 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 1859 mSolverCounterSat, 275 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 2134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 275 IncrementalHoareTripleChecker+Valid, 1859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-18 15:58:08,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 597 Invalid, 2134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [275 Valid, 1859 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-18 15:58:08,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2023-02-18 15:58:08,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 382. [2023-02-18 15:58:08,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 1.3018372703412073) internal successors, (496), 381 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:58:08,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 496 transitions. [2023-02-18 15:58:08,455 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 496 transitions. Word has length 31 [2023-02-18 15:58:08,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:58:08,456 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 496 transitions. [2023-02-18 15:58:08,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:58:08,456 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 496 transitions. [2023-02-18 15:58:08,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-18 15:58:08,457 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:58:08,457 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:58:08,461 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 15:58:08,661 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 15:58:08,661 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:58:08,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:58:08,662 INFO L85 PathProgramCache]: Analyzing trace with hash 380203431, now seen corresponding path program 5 times [2023-02-18 15:58:08,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:58:08,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067777572] [2023-02-18 15:58:08,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:58:08,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:58:08,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:58:08,784 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-02-18 15:58:08,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:58:08,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067777572] [2023-02-18 15:58:08,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067777572] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:58:08,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11926592] [2023-02-18 15:58:08,785 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 15:58:08,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:58:08,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:58:08,786 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 15:58:08,788 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 15:58:08,869 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-02-18 15:58:08,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:58:08,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-18 15:58:08,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:58:08,930 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-18 15:58:08,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:58:08,970 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-18 15:58:08,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11926592] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:58:08,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:58:08,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 15 [2023-02-18 15:58:08,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974865465] [2023-02-18 15:58:08,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:58:08,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-18 15:58:08,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:58:08,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-18 15:58:08,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2023-02-18 15:58:08,972 INFO L87 Difference]: Start difference. First operand 382 states and 496 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 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 15:58:09,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:58:09,965 INFO L93 Difference]: Finished difference Result 859 states and 1066 transitions. [2023-02-18 15:58:09,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-18 15:58:09,965 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 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 32 [2023-02-18 15:58:09,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:58:09,967 INFO L225 Difference]: With dead ends: 859 [2023-02-18 15:58:09,967 INFO L226 Difference]: Without dead ends: 820 [2023-02-18 15:58:09,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 52 SyntacticMatches, 9 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2023-02-18 15:58:09,968 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 183 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 15:58:09,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 176 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 15:58:09,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2023-02-18 15:58:10,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 400. [2023-02-18 15:58:10,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 1.2882205513784462) internal successors, (514), 399 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:58:10,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 514 transitions. [2023-02-18 15:58:10,097 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 514 transitions. Word has length 32 [2023-02-18 15:58:10,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:58:10,097 INFO L495 AbstractCegarLoop]: Abstraction has 400 states and 514 transitions. [2023-02-18 15:58:10,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 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 15:58:10,097 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 514 transitions. [2023-02-18 15:58:10,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-18 15:58:10,098 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:58:10,098 INFO L195 NwaCegarLoop]: trace histogram [10, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:58:10,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-18 15:58:10,302 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 15:58:10,302 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:58:10,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:58:10,303 INFO L85 PathProgramCache]: Analyzing trace with hash -722048680, now seen corresponding path program 7 times [2023-02-18 15:58:10,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:58:10,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002167204] [2023-02-18 15:58:10,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:58:10,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:58:10,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:58:10,452 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-18 15:58:10,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:58:10,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002167204] [2023-02-18 15:58:10,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002167204] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:58:10,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860349937] [2023-02-18 15:58:10,453 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 15:58:10,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:58:10,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:58:10,457 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 15:58:10,459 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 15:58:10,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:58:10,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-18 15:58:10,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:58:10,626 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-18 15:58:10,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:58:10,731 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-02-18 15:58:10,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860349937] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:58:10,732 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:58:10,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20, 9] total 28 [2023-02-18 15:58:10,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426828088] [2023-02-18 15:58:10,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:58:10,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-18 15:58:10,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:58:10,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-18 15:58:10,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2023-02-18 15:58:10,733 INFO L87 Difference]: Start difference. First operand 400 states and 514 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:58:13,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:58:13,104 INFO L93 Difference]: Finished difference Result 724 states and 1022 transitions. [2023-02-18 15:58:13,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2023-02-18 15:58:13,104 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-02-18 15:58:13,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:58:13,106 INFO L225 Difference]: With dead ends: 724 [2023-02-18 15:58:13,106 INFO L226 Difference]: Without dead ends: 661 [2023-02-18 15:58:13,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 40 SyntacticMatches, 14 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3172 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1117, Invalid=9389, Unknown=0, NotChecked=0, Total=10506 [2023-02-18 15:58:13,107 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 158 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 2063 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 2287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 2063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-18 15:58:13,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 605 Invalid, 2287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 2063 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-18 15:58:13,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2023-02-18 15:58:13,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 384. [2023-02-18 15:58:13,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 1.2924281984334203) internal successors, (495), 383 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:58:13,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 495 transitions. [2023-02-18 15:58:13,247 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 495 transitions. Word has length 32 [2023-02-18 15:58:13,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:58:13,247 INFO L495 AbstractCegarLoop]: Abstraction has 384 states and 495 transitions. [2023-02-18 15:58:13,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 28 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:58:13,247 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 495 transitions. [2023-02-18 15:58:13,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-18 15:58:13,247 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:58:13,247 INFO L195 NwaCegarLoop]: trace histogram [11, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:58:13,252 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 15:58:13,452 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 15:58:13,452 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:58:13,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:58:13,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1669364526, now seen corresponding path program 4 times [2023-02-18 15:58:13,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:58:13,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305226369] [2023-02-18 15:58:13,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:58:13,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:58:13,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:58:13,609 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-18 15:58:13,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:58:13,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305226369] [2023-02-18 15:58:13,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305226369] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:58:13,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812656435] [2023-02-18 15:58:13,609 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 15:58:13,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:58:13,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:58:13,610 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 15:58:13,612 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 15:58:13,648 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 15:58:13,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:58:13,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-18 15:58:13,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:58:13,815 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 15:58:13,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:58:13,927 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-02-18 15:58:13,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812656435] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:58:13,928 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:58:13,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21, 9] total 30 [2023-02-18 15:58:13,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232920924] [2023-02-18 15:58:13,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:58:13,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-18 15:58:13,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:58:13,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-18 15:58:13,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2023-02-18 15:58:13,929 INFO L87 Difference]: Start difference. First operand 384 states and 495 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 30 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 15:58:16,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:58:16,987 INFO L93 Difference]: Finished difference Result 757 states and 1054 transitions. [2023-02-18 15:58:16,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2023-02-18 15:58:16,987 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 30 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 33 [2023-02-18 15:58:16,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:58:16,989 INFO L225 Difference]: With dead ends: 757 [2023-02-18 15:58:16,989 INFO L226 Difference]: Without dead ends: 664 [2023-02-18 15:58:16,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 40 SyntacticMatches, 15 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5024 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1499, Invalid=13753, Unknown=0, NotChecked=0, Total=15252 [2023-02-18 15:58:16,990 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 186 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 2321 mSolverCounterSat, 290 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 2611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 290 IncrementalHoareTripleChecker+Valid, 2321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-02-18 15:58:16,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 706 Invalid, 2611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [290 Valid, 2321 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-02-18 15:58:16,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2023-02-18 15:58:17,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 410. [2023-02-18 15:58:17,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 1.293398533007335) internal successors, (529), 409 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:58:17,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 529 transitions. [2023-02-18 15:58:17,143 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 529 transitions. Word has length 33 [2023-02-18 15:58:17,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:58:17,143 INFO L495 AbstractCegarLoop]: Abstraction has 410 states and 529 transitions. [2023-02-18 15:58:17,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 30 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 15:58:17,143 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 529 transitions. [2023-02-18 15:58:17,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-18 15:58:17,144 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:58:17,144 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:58:17,149 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 15:58:17,345 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 15:58:17,345 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:58:17,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:58:17,346 INFO L85 PathProgramCache]: Analyzing trace with hash 89661625, now seen corresponding path program 8 times [2023-02-18 15:58:17,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:58:17,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843295556] [2023-02-18 15:58:17,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:58:17,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:58:17,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:58:17,486 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-18 15:58:17,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:58:17,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843295556] [2023-02-18 15:58:17,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843295556] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:58:17,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772612860] [2023-02-18 15:58:17,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 15:58:17,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:58:17,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:58:17,487 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 15:58:17,490 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 15:58:17,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 15:58:17,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:58:17,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-18 15:58:17,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:58:17,633 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 15 proven. 32 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-18 15:58:17,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:58:17,636 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 15 proven. 32 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-18 15:58:17,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772612860] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:58:17,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:58:17,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 24 [2023-02-18 15:58:17,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805820237] [2023-02-18 15:58:17,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:58:17,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-18 15:58:17,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:58:17,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-18 15:58:17,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=501, Unknown=0, NotChecked=0, Total=552 [2023-02-18 15:58:17,637 INFO L87 Difference]: Start difference. First operand 410 states and 529 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:58:27,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:58:27,399 INFO L93 Difference]: Finished difference Result 1489 states and 1759 transitions. [2023-02-18 15:58:27,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 241 states. [2023-02-18 15:58:27,400 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-02-18 15:58:27,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:58:27,403 INFO L225 Difference]: With dead ends: 1489 [2023-02-18 15:58:27,403 INFO L226 Difference]: Without dead ends: 1408 [2023-02-18 15:58:27,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25338 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=3464, Invalid=57792, Unknown=0, NotChecked=0, Total=61256 [2023-02-18 15:58:27,407 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 782 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 2343 mSolverCounterSat, 482 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 782 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 2825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 482 IncrementalHoareTripleChecker+Valid, 2343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-02-18 15:58:27,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [782 Valid, 583 Invalid, 2825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [482 Valid, 2343 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-02-18 15:58:27,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1408 states. [2023-02-18 15:58:27,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1408 to 381. [2023-02-18 15:58:27,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 1.2947368421052632) internal successors, (492), 380 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 15:58:27,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 492 transitions. [2023-02-18 15:58:27,566 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 492 transitions. Word has length 34 [2023-02-18 15:58:27,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:58:27,567 INFO L495 AbstractCegarLoop]: Abstraction has 381 states and 492 transitions. [2023-02-18 15:58:27,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:58:27,567 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 492 transitions. [2023-02-18 15:58:27,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-18 15:58:27,568 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:58:27,568 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:58:27,573 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 15:58:27,772 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 15:58:27,773 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:58:27,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:58:27,773 INFO L85 PathProgramCache]: Analyzing trace with hash 386903752, now seen corresponding path program 7 times [2023-02-18 15:58:27,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:58:27,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492890851] [2023-02-18 15:58:27,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:58:27,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:58:27,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:58:27,959 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:58:27,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:58:27,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492890851] [2023-02-18 15:58:27,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492890851] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:58:27,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129664270] [2023-02-18 15:58:27,959 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 15:58:27,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:58:27,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:58:27,960 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 15:58:27,984 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 15:58:28,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:58:28,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-18 15:58:28,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:58:28,137 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-02-18 15:58:28,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:58:28,141 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-02-18 15:58:28,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129664270] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:58:28,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:58:28,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10, 10] total 27 [2023-02-18 15:58:28,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807619269] [2023-02-18 15:58:28,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:58:28,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-18 15:58:28,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:58:28,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-18 15:58:28,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2023-02-18 15:58:28,142 INFO L87 Difference]: Start difference. First operand 381 states and 492 transitions. Second operand has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:58:56,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:58:56,152 INFO L93 Difference]: Finished difference Result 1756 states and 2113 transitions. [2023-02-18 15:58:56,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 363 states. [2023-02-18 15:58:56,153 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-02-18 15:58:56,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:58:56,156 INFO L225 Difference]: With dead ends: 1756 [2023-02-18 15:58:56,156 INFO L226 Difference]: Without dead ends: 1685 [2023-02-18 15:58:56,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 376 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62156 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=6658, Invalid=135848, Unknown=0, NotChecked=0, Total=142506 [2023-02-18 15:58:56,161 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 1080 mSDsluCounter, 713 mSDsCounter, 0 mSdLazyCounter, 4873 mSolverCounterSat, 803 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1080 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 5676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 803 IncrementalHoareTripleChecker+Valid, 4873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2023-02-18 15:58:56,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1080 Valid, 754 Invalid, 5676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [803 Valid, 4873 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2023-02-18 15:58:56,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1685 states. [2023-02-18 15:58:56,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1685 to 453. [2023-02-18 15:58:56,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 1.2876106194690264) internal successors, (582), 452 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:58:56,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 582 transitions. [2023-02-18 15:58:56,400 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 582 transitions. Word has length 34 [2023-02-18 15:58:56,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:58:56,400 INFO L495 AbstractCegarLoop]: Abstraction has 453 states and 582 transitions. [2023-02-18 15:58:56,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:58:56,400 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 582 transitions. [2023-02-18 15:58:56,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-18 15:58:56,401 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:58:56,401 INFO L195 NwaCegarLoop]: trace histogram [12, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:58:56,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-02-18 15:58:56,606 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 15:58:56,606 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:58:56,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:58:56,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1527029822, now seen corresponding path program 6 times [2023-02-18 15:58:56,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:58:56,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23642922] [2023-02-18 15:58:56,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:58:56,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:58:56,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:58:56,786 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 15:58:56,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:58:56,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23642922] [2023-02-18 15:58:56,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23642922] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:58:56,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851031076] [2023-02-18 15:58:56,787 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 15:58:56,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:58:56,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:58:56,788 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 15:58:56,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-02-18 15:58:56,911 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-02-18 15:58:56,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:58:56,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-18 15:58:56,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:58:56,970 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2023-02-18 15:58:56,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:58:57,039 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2023-02-18 15:58:57,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851031076] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:58:57,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:58:57,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 6, 6] total 26 [2023-02-18 15:58:57,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538423926] [2023-02-18 15:58:57,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:58:57,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-18 15:58:57,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:58:57,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-18 15:58:57,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2023-02-18 15:58:57,041 INFO L87 Difference]: Start difference. First operand 453 states and 582 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 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 15:59:01,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:59:01,340 INFO L93 Difference]: Finished difference Result 1012 states and 1373 transitions. [2023-02-18 15:59:01,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2023-02-18 15:59:01,340 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 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 15:59:01,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:59:01,342 INFO L225 Difference]: With dead ends: 1012 [2023-02-18 15:59:01,342 INFO L226 Difference]: Without dead ends: 905 [2023-02-18 15:59:01,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11535 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1636, Invalid=29870, Unknown=0, NotChecked=0, Total=31506 [2023-02-18 15:59:01,344 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 306 mSDsluCounter, 929 mSDsCounter, 0 mSdLazyCounter, 2857 mSolverCounterSat, 278 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 987 SdHoareTripleChecker+Invalid, 3135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 2857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-02-18 15:59:01,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 987 Invalid, 3135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [278 Valid, 2857 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-02-18 15:59:01,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2023-02-18 15:59:01,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 542. [2023-02-18 15:59:01,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 1.3271719038817005) internal successors, (718), 541 states have internal predecessors, (718), 0 states have call successors, (0), 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 15:59:01,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 718 transitions. [2023-02-18 15:59:01,635 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 718 transitions. Word has length 35 [2023-02-18 15:59:01,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:59:01,635 INFO L495 AbstractCegarLoop]: Abstraction has 542 states and 718 transitions. [2023-02-18 15:59:01,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 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 15:59:01,635 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 718 transitions. [2023-02-18 15:59:01,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-18 15:59:01,636 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:59:01,636 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:59:01,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-02-18 15:59:01,841 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 15:59:01,841 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:59:01,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:59:01,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1563221799, now seen corresponding path program 7 times [2023-02-18 15:59:01,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:59:01,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489659363] [2023-02-18 15:59:01,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:59:01,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:59:01,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:59:02,045 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-18 15:59:02,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:59:02,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489659363] [2023-02-18 15:59:02,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489659363] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:59:02,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687095303] [2023-02-18 15:59:02,046 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 15:59:02,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:59:02,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:59:02,047 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 15:59:02,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-02-18 15:59:02,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:59:02,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 47 conjunts are in the unsatisfiable core [2023-02-18 15:59:02,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:59:02,142 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-18 15:59:02,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:59:02,175 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-18 15:59:02,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687095303] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:59:02,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:59:02,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2023-02-18 15:59:02,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872727026] [2023-02-18 15:59:02,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:59:02,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 15:59:02,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:59:02,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 15:59:02,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-02-18 15:59:02,177 INFO L87 Difference]: Start difference. First operand 542 states and 718 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 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 15:59:03,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:59:03,060 INFO L93 Difference]: Finished difference Result 939 states and 1214 transitions. [2023-02-18 15:59:03,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 15:59:03,060 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 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 15:59:03,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:59:03,062 INFO L225 Difference]: With dead ends: 939 [2023-02-18 15:59:03,062 INFO L226 Difference]: Without dead ends: 797 [2023-02-18 15:59:03,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 62 SyntacticMatches, 21 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-02-18 15:59:03,063 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 24 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 15:59:03,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 177 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 15:59:03,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2023-02-18 15:59:03,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 529. [2023-02-18 15:59:03,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 528 states have (on average 1.3257575757575757) internal successors, (700), 528 states have internal predecessors, (700), 0 states have call successors, (0), 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 15:59:03,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 700 transitions. [2023-02-18 15:59:03,373 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 700 transitions. Word has length 36 [2023-02-18 15:59:03,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:59:03,373 INFO L495 AbstractCegarLoop]: Abstraction has 529 states and 700 transitions. [2023-02-18 15:59:03,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 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 15:59:03,373 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 700 transitions. [2023-02-18 15:59:03,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-18 15:59:03,374 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:59:03,374 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:59:03,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-02-18 15:59:03,577 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 15:59:03,577 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:59:03,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:59:03,578 INFO L85 PathProgramCache]: Analyzing trace with hash 532015789, now seen corresponding path program 9 times [2023-02-18 15:59:03,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:59:03,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831559238] [2023-02-18 15:59:03,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:59:03,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:59:03,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:59:03,748 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-02-18 15:59:03,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:59:03,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831559238] [2023-02-18 15:59:03,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831559238] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:59:03,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051474614] [2023-02-18 15:59:03,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 15:59:03,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:59:03,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:59:03,751 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 15:59:03,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-02-18 15:59:03,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-18 15:59:03,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:59:03,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 54 conjunts are in the unsatisfiable core [2023-02-18 15:59:03,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:59:04,005 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-02-18 15:59:04,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:59:04,419 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 1 proven. 65 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-18 15:59:04,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051474614] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:59:04,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:59:04,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 44 [2023-02-18 15:59:04,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132108476] [2023-02-18 15:59:04,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:59:04,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-02-18 15:59:04,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:59:04,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-02-18 15:59:04,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1645, Unknown=0, NotChecked=0, Total=1892 [2023-02-18 15:59:04,421 INFO L87 Difference]: Start difference. First operand 529 states and 700 transitions. Second operand has 44 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 44 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 15:59:16,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:59:16,220 INFO L93 Difference]: Finished difference Result 1036 states and 1449 transitions. [2023-02-18 15:59:16,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2023-02-18 15:59:16,220 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 44 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 15:59:16,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:59:16,222 INFO L225 Difference]: With dead ends: 1036 [2023-02-18 15:59:16,222 INFO L226 Difference]: Without dead ends: 855 [2023-02-18 15:59:16,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 40 SyntacticMatches, 10 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7131 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=1511, Invalid=21745, Unknown=0, NotChecked=0, Total=23256 [2023-02-18 15:59:16,223 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 385 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 1815 mSolverCounterSat, 519 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 2334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 519 IncrementalHoareTripleChecker+Valid, 1815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-02-18 15:59:16,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 513 Invalid, 2334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [519 Valid, 1815 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-02-18 15:59:16,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2023-02-18 15:59:16,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 595. [2023-02-18 15:59:16,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 594 states have (on average 1.3585858585858586) internal successors, (807), 594 states have internal predecessors, (807), 0 states have call successors, (0), 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 15:59:16,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 807 transitions. [2023-02-18 15:59:16,587 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 807 transitions. Word has length 37 [2023-02-18 15:59:16,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:59:16,588 INFO L495 AbstractCegarLoop]: Abstraction has 595 states and 807 transitions. [2023-02-18 15:59:16,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 44 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 15:59:16,588 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 807 transitions. [2023-02-18 15:59:16,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-18 15:59:16,589 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:59:16,589 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:59:16,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-02-18 15:59:16,794 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 15:59:16,794 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:59:16,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:59:16,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1963294526, now seen corresponding path program 8 times [2023-02-18 15:59:16,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:59:16,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882040202] [2023-02-18 15:59:16,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:59:16,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:59:16,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:59:17,008 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:59:17,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:59:17,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882040202] [2023-02-18 15:59:17,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882040202] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:59:17,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419527930] [2023-02-18 15:59:17,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 15:59:17,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:59:17,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:59:17,009 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 15:59:17,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-02-18 15:59:17,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 15:59:17,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:59:17,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-18 15:59:17,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:59:17,223 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-02-18 15:59:17,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:59:17,226 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-02-18 15:59:17,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419527930] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:59:17,226 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:59:17,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11, 11] total 30 [2023-02-18 15:59:17,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736627705] [2023-02-18 15:59:17,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:59:17,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-18 15:59:17,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:59:17,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-18 15:59:17,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2023-02-18 15:59:17,227 INFO L87 Difference]: Start difference. First operand 595 states and 807 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 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 16:00:17,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:00:17,958 INFO L93 Difference]: Finished difference Result 2402 states and 2947 transitions. [2023-02-18 16:00:17,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 499 states. [2023-02-18 16:00:17,958 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 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 16:00:17,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:00:17,963 INFO L225 Difference]: With dead ends: 2402 [2023-02-18 16:00:17,963 INFO L226 Difference]: Without dead ends: 2306 [2023-02-18 16:00:17,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 587 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 514 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119404 ImplicationChecksByTransitivity, 46.6s TimeCoverageRelationStatistics Valid=10641, Invalid=255099, Unknown=0, NotChecked=0, Total=265740 [2023-02-18 16:00:17,973 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 1567 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 6261 mSolverCounterSat, 1216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1567 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 7477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1216 IncrementalHoareTripleChecker+Valid, 6261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2023-02-18 16:00:17,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1567 Valid, 746 Invalid, 7477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1216 Valid, 6261 Invalid, 0 Unknown, 0 Unchecked, 9.9s Time] [2023-02-18 16:00:17,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2306 states. [2023-02-18 16:00:18,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2306 to 654. [2023-02-18 16:00:18,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 653 states have (on average 1.3583460949464012) internal successors, (887), 653 states have internal predecessors, (887), 0 states have call successors, (0), 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 16:00:18,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 887 transitions. [2023-02-18 16:00:18,412 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 887 transitions. Word has length 37 [2023-02-18 16:00:18,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:00:18,412 INFO L495 AbstractCegarLoop]: Abstraction has 654 states and 887 transitions. [2023-02-18 16:00:18,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 0 states have call successors, (0), 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 16:00:18,412 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 887 transitions. [2023-02-18 16:00:18,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-18 16:00:18,414 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:00:18,414 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:00:18,419 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 16:00:18,614 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 16:00:18,614 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:00:18,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:00:18,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1506070490, now seen corresponding path program 8 times [2023-02-18 16:00:18,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:00:18,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399163126] [2023-02-18 16:00:18,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:00:18,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:00:18,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:00:18,777 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-18 16:00:18,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:00:18,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399163126] [2023-02-18 16:00:18,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399163126] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:00:18,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334217986] [2023-02-18 16:00:18,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 16:00:18,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:00:18,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:00:18,779 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 16:00:18,781 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 16:00:18,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 16:00:18,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:00:18,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-18 16:00:18,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:00:18,924 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-18 16:00:18,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:00:18,999 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-18 16:00:18,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334217986] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:00:18,999 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:00:18,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 18 [2023-02-18 16:00:19,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318365083] [2023-02-18 16:00:19,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:00:19,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-18 16:00:19,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:00:19,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-18 16:00:19,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2023-02-18 16:00:19,001 INFO L87 Difference]: Start difference. First operand 654 states and 887 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:00:23,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:00:23,004 INFO L93 Difference]: Finished difference Result 1609 states and 2006 transitions. [2023-02-18 16:00:23,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-02-18 16:00:23,005 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-02-18 16:00:23,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:00:23,008 INFO L225 Difference]: With dead ends: 1609 [2023-02-18 16:00:23,008 INFO L226 Difference]: Without dead ends: 1544 [2023-02-18 16:00:23,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 60 SyntacticMatches, 13 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=331, Invalid=1229, Unknown=0, NotChecked=0, Total=1560 [2023-02-18 16:00:23,009 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 227 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-18 16:00:23,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 313 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-18 16:00:23,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2023-02-18 16:00:23,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 714. [2023-02-18 16:00:23,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 713 states have (on average 1.3450210378681626) internal successors, (959), 713 states have internal predecessors, (959), 0 states have call successors, (0), 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 16:00:23,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 959 transitions. [2023-02-18 16:00:23,431 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 959 transitions. Word has length 38 [2023-02-18 16:00:23,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:00:23,431 INFO L495 AbstractCegarLoop]: Abstraction has 714 states and 959 transitions. [2023-02-18 16:00:23,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:00:23,431 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 959 transitions. [2023-02-18 16:00:23,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-18 16:00:23,432 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:00:23,432 INFO L195 NwaCegarLoop]: trace histogram [13, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:00:23,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-02-18 16:00:23,637 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 16:00:23,637 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:00:23,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:00:23,638 INFO L85 PathProgramCache]: Analyzing trace with hash -371987587, now seen corresponding path program 10 times [2023-02-18 16:00:23,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:00:23,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024694008] [2023-02-18 16:00:23,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:00:23,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:00:23,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:00:23,862 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-18 16:00:23,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:00:23,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024694008] [2023-02-18 16:00:23,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024694008] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:00:23,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274814935] [2023-02-18 16:00:23,862 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 16:00:23,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:00:23,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:00:23,864 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 16:00:23,866 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 16:00:23,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 16:00:23,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:00:23,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-18 16:00:23,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:00:24,034 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-18 16:00:24,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:00:24,181 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2023-02-18 16:00:24,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274814935] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:00:24,181 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:00:24,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 10] total 32 [2023-02-18 16:00:24,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872023745] [2023-02-18 16:00:24,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:00:24,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-18 16:00:24,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:00:24,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-18 16:00:24,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2023-02-18 16:00:24,183 INFO L87 Difference]: Start difference. First operand 714 states and 959 transitions. Second operand has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:00:27,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:00:27,688 INFO L93 Difference]: Finished difference Result 1264 states and 1801 transitions. [2023-02-18 16:00:27,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2023-02-18 16:00:27,688 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-02-18 16:00:27,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:00:27,691 INFO L225 Difference]: With dead ends: 1264 [2023-02-18 16:00:27,691 INFO L226 Difference]: Without dead ends: 957 [2023-02-18 16:00:27,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 52 SyntacticMatches, 15 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3236 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=758, Invalid=10798, Unknown=0, NotChecked=0, Total=11556 [2023-02-18 16:00:27,692 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 186 mSDsluCounter, 1211 mSDsCounter, 0 mSdLazyCounter, 1884 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 1281 SdHoareTripleChecker+Invalid, 2111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 1884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-18 16:00:27,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 1281 Invalid, 2111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 1884 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-18 16:00:27,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2023-02-18 16:00:28,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 733. [2023-02-18 16:00:28,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 732 states have (on average 1.3442622950819672) internal successors, (984), 732 states have internal predecessors, (984), 0 states have call successors, (0), 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 16:00:28,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 984 transitions. [2023-02-18 16:00:28,181 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 984 transitions. Word has length 39 [2023-02-18 16:00:28,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:00:28,181 INFO L495 AbstractCegarLoop]: Abstraction has 733 states and 984 transitions. [2023-02-18 16:00:28,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.5) internal successors, (48), 32 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:00:28,181 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 984 transitions. [2023-02-18 16:00:28,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-18 16:00:28,185 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:00:28,185 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:00:28,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-02-18 16:00:28,390 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 16:00:28,390 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:00:28,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:00:28,391 INFO L85 PathProgramCache]: Analyzing trace with hash 924657721, now seen corresponding path program 11 times [2023-02-18 16:00:28,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:00:28,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260097698] [2023-02-18 16:00:28,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:00:28,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:00:28,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:00:28,605 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-02-18 16:00:28,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:00:28,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260097698] [2023-02-18 16:00:28,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260097698] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:00:28,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113666645] [2023-02-18 16:00:28,606 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 16:00:28,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:00:28,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:00:28,607 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 16:00:28,609 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 16:00:29,894 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-02-18 16:00:29,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:00:29,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 60 conjunts are in the unsatisfiable core [2023-02-18 16:00:29,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:00:30,112 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-02-18 16:00:30,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:00:30,596 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 1 proven. 82 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-18 16:00:30,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113666645] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:00:30,597 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:00:30,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 49 [2023-02-18 16:00:30,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436529382] [2023-02-18 16:00:30,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:00:30,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-18 16:00:30,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:00:30,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-18 16:00:30,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=2057, Unknown=0, NotChecked=0, Total=2352 [2023-02-18 16:00:30,598 INFO L87 Difference]: Start difference. First operand 733 states and 984 transitions. Second operand has 49 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:00:58,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:00:58,819 INFO L93 Difference]: Finished difference Result 1225 states and 1664 transitions. [2023-02-18 16:00:58,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2023-02-18 16:00:58,819 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-02-18 16:00:58,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:00:58,821 INFO L225 Difference]: With dead ends: 1225 [2023-02-18 16:00:58,821 INFO L226 Difference]: Without dead ends: 942 [2023-02-18 16:00:58,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 42 SyntacticMatches, 11 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15510 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=2496, Invalid=43086, Unknown=0, NotChecked=0, Total=45582 [2023-02-18 16:00:58,826 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 395 mSDsluCounter, 807 mSDsCounter, 0 mSdLazyCounter, 3313 mSolverCounterSat, 676 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 845 SdHoareTripleChecker+Invalid, 3989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 676 IncrementalHoareTripleChecker+Valid, 3313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2023-02-18 16:00:58,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 845 Invalid, 3989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [676 Valid, 3313 Invalid, 0 Unknown, 0 Unchecked, 9.3s Time] [2023-02-18 16:00:58,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2023-02-18 16:00:59,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 718. [2023-02-18 16:00:59,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 717 states have (on average 1.3361227336122734) internal successors, (958), 717 states have internal predecessors, (958), 0 states have call successors, (0), 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 16:00:59,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 958 transitions. [2023-02-18 16:00:59,330 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 958 transitions. Word has length 40 [2023-02-18 16:00:59,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:00:59,330 INFO L495 AbstractCegarLoop]: Abstraction has 718 states and 958 transitions. [2023-02-18 16:00:59,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:00:59,332 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 958 transitions. [2023-02-18 16:00:59,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-18 16:00:59,336 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:00:59,337 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:00:59,342 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 16:00:59,542 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 16:00:59,542 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:00:59,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:00:59,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1143634296, now seen corresponding path program 9 times [2023-02-18 16:00:59,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:00:59,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057039403] [2023-02-18 16:00:59,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:00:59,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:00:59,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:00:59,809 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 16:00:59,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:00:59,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057039403] [2023-02-18 16:00:59,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057039403] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:00:59,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818868942] [2023-02-18 16:00:59,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 16:00:59,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:00:59,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:00:59,810 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 16:00:59,813 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 16:00:59,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-18 16:00:59,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:00:59,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 64 conjunts are in the unsatisfiable core [2023-02-18 16:00:59,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:01:00,368 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 16:01:00,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:01:00,925 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-18 16:01:00,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818868942] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:01:00,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:01:00,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 31, 21] total 53 [2023-02-18 16:01:00,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221885126] [2023-02-18 16:01:00,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:01:00,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-02-18 16:01:00,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:01:00,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-02-18 16:01:00,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=541, Invalid=2215, Unknown=0, NotChecked=0, Total=2756 [2023-02-18 16:01:00,927 INFO L87 Difference]: Start difference. First operand 718 states and 958 transitions. Second operand has 53 states, 53 states have (on average 1.5471698113207548) internal successors, (82), 53 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:01:12,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:01:12,150 INFO L93 Difference]: Finished difference Result 1383 states and 2039 transitions. [2023-02-18 16:01:12,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2023-02-18 16:01:12,151 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.5471698113207548) internal successors, (82), 53 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-02-18 16:01:12,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:01:12,153 INFO L225 Difference]: With dead ends: 1383 [2023-02-18 16:01:12,153 INFO L226 Difference]: Without dead ends: 1290 [2023-02-18 16:01:12,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 41 SyntacticMatches, 18 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12278 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=7792, Invalid=26990, Unknown=0, NotChecked=0, Total=34782 [2023-02-18 16:01:12,155 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 734 mSDsluCounter, 970 mSDsCounter, 0 mSdLazyCounter, 5123 mSolverCounterSat, 582 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 734 SdHoareTripleChecker+Valid, 1019 SdHoareTripleChecker+Invalid, 5705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 582 IncrementalHoareTripleChecker+Valid, 5123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-02-18 16:01:12,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [734 Valid, 1019 Invalid, 5705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [582 Valid, 5123 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-02-18 16:01:12,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1290 states. [2023-02-18 16:01:12,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1290 to 794. [2023-02-18 16:01:12,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 793 states have (on average 1.3026481715006306) internal successors, (1033), 793 states have internal predecessors, (1033), 0 states have call successors, (0), 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 16:01:12,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1033 transitions. [2023-02-18 16:01:12,702 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1033 transitions. Word has length 40 [2023-02-18 16:01:12,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:01:12,702 INFO L495 AbstractCegarLoop]: Abstraction has 794 states and 1033 transitions. [2023-02-18 16:01:12,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.5471698113207548) internal successors, (82), 53 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 16:01:12,702 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1033 transitions. [2023-02-18 16:01:12,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-18 16:01:12,703 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:01:12,703 INFO L195 NwaCegarLoop]: trace histogram [14, 9, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:01:12,708 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 16:01:12,905 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 16:01:12,905 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:01:12,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:01:12,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1347071059, now seen corresponding path program 10 times [2023-02-18 16:01:12,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:01:12,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246594972] [2023-02-18 16:01:12,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:01:12,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:01:12,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:01:13,224 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 16:01:13,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:01:13,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246594972] [2023-02-18 16:01:13,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246594972] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:01:13,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052657211] [2023-02-18 16:01:13,224 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 16:01:13,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:01:13,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:01:13,225 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 16:01:13,237 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 16:01:13,278 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 16:01:13,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:01:13,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-18 16:01:13,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:01:13,506 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 54 proven. 81 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-18 16:01:13,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:01:13,510 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 54 proven. 81 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-18 16:01:13,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052657211] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:01:13,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:01:13,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 12, 12] total 37 [2023-02-18 16:01:13,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097745470] [2023-02-18 16:01:13,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:01:13,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-02-18 16:01:13,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:01:13,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-02-18 16:01:13,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2023-02-18 16:01:13,511 INFO L87 Difference]: Start difference. First operand 794 states and 1033 transitions. Second operand has 37 states, 37 states have (on average 1.7027027027027026) internal successors, (63), 37 states have internal predecessors, (63), 0 states have call successors, (0), 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 16:03:36,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:03:36,031 INFO L93 Difference]: Finished difference Result 3794 states and 4870 transitions. [2023-02-18 16:03:36,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 775 states. [2023-02-18 16:03:36,032 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7027027027027026) internal successors, (63), 37 states have internal predecessors, (63), 0 states have call successors, (0), 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 41 [2023-02-18 16:03:36,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:03:36,040 INFO L225 Difference]: With dead ends: 3794 [2023-02-18 16:03:36,040 INFO L226 Difference]: Without dead ends: 3390 [2023-02-18 16:03:36,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 871 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 783 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283890 ImplicationChecksByTransitivity, 116.5s TimeCoverageRelationStatistics Valid=21124, Invalid=594316, Unknown=0, NotChecked=0, Total=615440 [2023-02-18 16:03:36,058 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 1763 mSDsluCounter, 1368 mSDsCounter, 0 mSdLazyCounter, 6038 mSolverCounterSat, 1553 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1763 SdHoareTripleChecker+Valid, 1435 SdHoareTripleChecker+Invalid, 7591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1553 IncrementalHoareTripleChecker+Valid, 6038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.5s IncrementalHoareTripleChecker+Time [2023-02-18 16:03:36,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1763 Valid, 1435 Invalid, 7591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1553 Valid, 6038 Invalid, 0 Unknown, 0 Unchecked, 17.5s Time] [2023-02-18 16:03:36,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3390 states. [2023-02-18 16:03:36,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3390 to 836. [2023-02-18 16:03:36,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 835 states have (on average 1.3101796407185629) internal successors, (1094), 835 states have internal predecessors, (1094), 0 states have call successors, (0), 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 16:03:36,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 1094 transitions. [2023-02-18 16:03:36,697 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 1094 transitions. Word has length 41 [2023-02-18 16:03:36,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:03:36,697 INFO L495 AbstractCegarLoop]: Abstraction has 836 states and 1094 transitions. [2023-02-18 16:03:36,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.7027027027027026) internal successors, (63), 37 states have internal predecessors, (63), 0 states have call successors, (0), 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 16:03:36,697 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 1094 transitions. [2023-02-18 16:03:36,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-18 16:03:36,698 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:03:36,698 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:03:36,703 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 16:03:36,899 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 16:03:36,899 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:03:36,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:03:36,900 INFO L85 PathProgramCache]: Analyzing trace with hash -2041166362, now seen corresponding path program 9 times [2023-02-18 16:03:36,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:03:36,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709476919] [2023-02-18 16:03:36,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:03:36,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:03:36,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:03:37,144 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-18 16:03:37,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:03:37,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709476919] [2023-02-18 16:03:37,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709476919] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:03:37,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463380627] [2023-02-18 16:03:37,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 16:03:37,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:03:37,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:03:37,146 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 16:03:37,148 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 16:03:37,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-18 16:03:37,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:03:37,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 47 conjunts are in the unsatisfiable core [2023-02-18 16:03:37,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:03:37,338 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-18 16:03:37,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:03:37,428 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-18 16:03:37,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463380627] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:03:37,428 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:03:37,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10 [2023-02-18 16:03:37,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155205640] [2023-02-18 16:03:37,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:03:37,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 16:03:37,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:03:37,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 16:03:37,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-02-18 16:03:37,429 INFO L87 Difference]: Start difference. First operand 836 states and 1094 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 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 16:03:39,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:03:39,455 INFO L93 Difference]: Finished difference Result 1467 states and 1855 transitions. [2023-02-18 16:03:39,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 16:03:39,456 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 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 42 [2023-02-18 16:03:39,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:03:39,459 INFO L225 Difference]: With dead ends: 1467 [2023-02-18 16:03:39,459 INFO L226 Difference]: Without dead ends: 1272 [2023-02-18 16:03:39,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 54 SyntacticMatches, 44 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-02-18 16:03:39,460 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 32 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 16:03:39,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 253 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 16:03:39,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2023-02-18 16:03:40,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 827. [2023-02-18 16:03:40,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 826 states have (on average 1.3087167070217918) internal successors, (1081), 826 states have internal predecessors, (1081), 0 states have call successors, (0), 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 16:03:40,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1081 transitions. [2023-02-18 16:03:40,113 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1081 transitions. Word has length 42 [2023-02-18 16:03:40,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:03:40,113 INFO L495 AbstractCegarLoop]: Abstraction has 827 states and 1081 transitions. [2023-02-18 16:03:40,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 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 16:03:40,113 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1081 transitions. [2023-02-18 16:03:40,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-18 16:03:40,114 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:03:40,114 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:03:40,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-02-18 16:03:40,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:03:40,317 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:03:40,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:03:40,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1838665466, now seen corresponding path program 10 times [2023-02-18 16:03:40,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:03:40,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541572897] [2023-02-18 16:03:40,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:03:40,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:03:40,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:03:40,544 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-02-18 16:03:40,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:03:40,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541572897] [2023-02-18 16:03:40,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541572897] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:03:40,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421933614] [2023-02-18 16:03:40,544 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 16:03:40,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:03:40,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:03:40,549 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:03:40,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-02-18 16:03:40,594 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 16:03:40,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:03:40,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-18 16:03:40,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:03:40,736 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 12 proven. 44 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-02-18 16:03:40,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:03:40,821 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 12 proven. 44 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-02-18 16:03:40,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421933614] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:03:40,821 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:03:40,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 24 [2023-02-18 16:03:40,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49368065] [2023-02-18 16:03:40,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:03:40,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-18 16:03:40,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:03:40,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-18 16:03:40,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2023-02-18 16:03:40,823 INFO L87 Difference]: Start difference. First operand 827 states and 1081 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 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 16:03:45,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:03:45,207 INFO L93 Difference]: Finished difference Result 1810 states and 2225 transitions. [2023-02-18 16:03:45,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-18 16:03:45,208 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 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 42 [2023-02-18 16:03:45,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:03:45,211 INFO L225 Difference]: With dead ends: 1810 [2023-02-18 16:03:45,211 INFO L226 Difference]: Without dead ends: 1721 [2023-02-18 16:03:45,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 60 SyntacticMatches, 17 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=277, Invalid=913, Unknown=0, NotChecked=0, Total=1190 [2023-02-18 16:03:45,212 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 306 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 16:03:45,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 535 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 16:03:45,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2023-02-18 16:03:45,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 847. [2023-02-18 16:03:45,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 846 states have (on average 1.2907801418439717) internal successors, (1092), 846 states have internal predecessors, (1092), 0 states have call successors, (0), 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 16:03:45,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 1092 transitions. [2023-02-18 16:03:45,885 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 1092 transitions. Word has length 42 [2023-02-18 16:03:45,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:03:45,885 INFO L495 AbstractCegarLoop]: Abstraction has 847 states and 1092 transitions. [2023-02-18 16:03:45,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 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 16:03:45,885 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 1092 transitions. [2023-02-18 16:03:45,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-18 16:03:45,886 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:03:45,886 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:03:45,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-02-18 16:03:46,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:03:46,091 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:03:46,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:03:46,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1263287635, now seen corresponding path program 12 times [2023-02-18 16:03:46,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:03:46,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302350114] [2023-02-18 16:03:46,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:03:46,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:03:46,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:03:46,325 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-02-18 16:03:46,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:03:46,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302350114] [2023-02-18 16:03:46,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302350114] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:03:46,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714765384] [2023-02-18 16:03:46,326 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 16:03:46,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:03:46,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:03:46,327 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:03:46,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-02-18 16:03:46,499 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-02-18 16:03:46,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:03:46,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 66 conjunts are in the unsatisfiable core [2023-02-18 16:03:46,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:03:46,728 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-02-18 16:03:46,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:03:47,270 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 1 proven. 101 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-02-18 16:03:47,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714765384] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:03:47,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:03:47,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 54 [2023-02-18 16:03:47,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466888077] [2023-02-18 16:03:47,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:03:47,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-02-18 16:03:47,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:03:47,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-02-18 16:03:47,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=2515, Unknown=0, NotChecked=0, Total=2862 [2023-02-18 16:03:47,271 INFO L87 Difference]: Start difference. First operand 847 states and 1092 transitions. Second operand has 54 states, 54 states have (on average 1.3703703703703705) internal successors, (74), 54 states have internal predecessors, (74), 0 states have call successors, (0), 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 16:04:31,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:04:31,778 INFO L93 Difference]: Finished difference Result 1360 states and 1802 transitions. [2023-02-18 16:04:31,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 227 states. [2023-02-18 16:04:31,779 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.3703703703703705) internal successors, (74), 54 states have internal predecessors, (74), 0 states have call successors, (0), 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 43 [2023-02-18 16:04:31,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:04:31,781 INFO L225 Difference]: With dead ends: 1360 [2023-02-18 16:04:31,781 INFO L226 Difference]: Without dead ends: 1085 [2023-02-18 16:04:31,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 44 SyntacticMatches, 12 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19274 ImplicationChecksByTransitivity, 30.4s TimeCoverageRelationStatistics Valid=2894, Invalid=53512, Unknown=0, NotChecked=0, Total=56406 [2023-02-18 16:04:31,784 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 462 mSDsluCounter, 1010 mSDsCounter, 0 mSdLazyCounter, 3652 mSolverCounterSat, 808 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 1056 SdHoareTripleChecker+Invalid, 4460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 808 IncrementalHoareTripleChecker+Valid, 3652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.5s IncrementalHoareTripleChecker+Time [2023-02-18 16:04:31,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [462 Valid, 1056 Invalid, 4460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [808 Valid, 3652 Invalid, 0 Unknown, 0 Unchecked, 13.5s Time] [2023-02-18 16:04:31,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1085 states. [2023-02-18 16:04:32,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1085 to 832. [2023-02-18 16:04:32,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 831 states have (on average 1.2900120336943441) internal successors, (1072), 831 states have internal predecessors, (1072), 0 states have call successors, (0), 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 16:04:32,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 1072 transitions. [2023-02-18 16:04:32,458 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 1072 transitions. Word has length 43 [2023-02-18 16:04:32,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:04:32,458 INFO L495 AbstractCegarLoop]: Abstraction has 832 states and 1072 transitions. [2023-02-18 16:04:32,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.3703703703703705) internal successors, (74), 54 states have internal predecessors, (74), 0 states have call successors, (0), 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 16:04:32,459 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 1072 transitions. [2023-02-18 16:04:32,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-18 16:04:32,460 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:04:32,460 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:04:32,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-02-18 16:04:32,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-02-18 16:04:32,664 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:04:32,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:04:32,665 INFO L85 PathProgramCache]: Analyzing trace with hash -149123330, now seen corresponding path program 11 times [2023-02-18 16:04:32,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:04:32,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513766433] [2023-02-18 16:04:32,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:04:32,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:04:32,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:04:32,967 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 0 proven. 166 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 16:04:32,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:04:32,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513766433] [2023-02-18 16:04:32,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513766433] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:04:32,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007254681] [2023-02-18 16:04:32,968 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 16:04:32,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:04:32,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:04:32,969 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:04:32,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-02-18 16:04:34,862 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-02-18 16:04:34,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:04:34,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 70 conjunts are in the unsatisfiable core [2023-02-18 16:04:34,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:04:35,274 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 0 proven. 166 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 16:04:35,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:04:35,847 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-02-18 16:04:35,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007254681] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:04:35,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:04:35,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 34, 23] total 58 [2023-02-18 16:04:35,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682581348] [2023-02-18 16:04:35,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:04:35,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-02-18 16:04:35,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:04:35,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-02-18 16:04:35,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=639, Invalid=2667, Unknown=0, NotChecked=0, Total=3306 [2023-02-18 16:04:35,849 INFO L87 Difference]: Start difference. First operand 832 states and 1072 transitions. Second operand has 58 states, 58 states have (on average 1.5172413793103448) internal successors, (88), 58 states have internal predecessors, (88), 0 states have call successors, (0), 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 16:04:53,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:04:53,418 INFO L93 Difference]: Finished difference Result 1630 states and 2329 transitions. [2023-02-18 16:04:53,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 201 states. [2023-02-18 16:04:53,419 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.5172413793103448) internal successors, (88), 58 states have internal predecessors, (88), 0 states have call successors, (0), 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 43 [2023-02-18 16:04:53,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:04:53,421 INFO L225 Difference]: With dead ends: 1630 [2023-02-18 16:04:53,421 INFO L226 Difference]: Without dead ends: 1524 [2023-02-18 16:04:53,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 43 SyntacticMatches, 20 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16733 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=10435, Invalid=36871, Unknown=0, NotChecked=0, Total=47306 [2023-02-18 16:04:53,423 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 791 mSDsluCounter, 1470 mSDsCounter, 0 mSdLazyCounter, 8254 mSolverCounterSat, 659 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 1524 SdHoareTripleChecker+Invalid, 8913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 659 IncrementalHoareTripleChecker+Valid, 8254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-02-18 16:04:53,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [791 Valid, 1524 Invalid, 8913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [659 Valid, 8254 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2023-02-18 16:04:53,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1524 states. [2023-02-18 16:04:54,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1524 to 879. [2023-02-18 16:04:54,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 878 states have (on average 1.29498861047836) internal successors, (1137), 878 states have internal predecessors, (1137), 0 states have call successors, (0), 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 16:04:54,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1137 transitions. [2023-02-18 16:04:54,196 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1137 transitions. Word has length 43 [2023-02-18 16:04:54,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:04:54,196 INFO L495 AbstractCegarLoop]: Abstraction has 879 states and 1137 transitions. [2023-02-18 16:04:54,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.5172413793103448) internal successors, (88), 58 states have internal predecessors, (88), 0 states have call successors, (0), 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 16:04:54,197 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1137 transitions. [2023-02-18 16:04:54,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-18 16:04:54,197 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:04:54,198 INFO L195 NwaCegarLoop]: trace histogram [15, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:04:54,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-02-18 16:04:54,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-02-18 16:04:54,398 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:04:54,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:04:54,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1753855043, now seen corresponding path program 11 times [2023-02-18 16:04:54,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:04:54,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868153974] [2023-02-18 16:04:54,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:04:54,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:04:54,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:04:54,616 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-18 16:04:54,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:04:54,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868153974] [2023-02-18 16:04:54,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868153974] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:04:54,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935198933] [2023-02-18 16:04:54,616 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 16:04:54,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:04:54,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:04:54,617 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:04:54,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-02-18 16:04:55,610 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2023-02-18 16:04:55,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:04:55,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 72 conjunts are in the unsatisfiable core [2023-02-18 16:04:55,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:04:55,937 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 16:04:55,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:04:56,213 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-02-18 16:04:56,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935198933] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:04:56,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:04:56,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 27, 15] total 44 [2023-02-18 16:04:56,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198242074] [2023-02-18 16:04:56,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:04:56,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-02-18 16:04:56,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:04:56,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-02-18 16:04:56,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=1457, Unknown=0, NotChecked=0, Total=1892 [2023-02-18 16:04:56,215 INFO L87 Difference]: Start difference. First operand 879 states and 1137 transitions. Second operand has 44 states, 44 states have (on average 1.8409090909090908) internal successors, (81), 44 states have internal predecessors, (81), 0 states have call successors, (0), 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 16:04:58,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:04:58,803 INFO L93 Difference]: Finished difference Result 1769 states and 2478 transitions. [2023-02-18 16:04:58,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-02-18 16:04:58,803 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.8409090909090908) internal successors, (81), 44 states have internal predecessors, (81), 0 states have call successors, (0), 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 43 [2023-02-18 16:04:58,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:04:58,805 INFO L225 Difference]: With dead ends: 1769 [2023-02-18 16:04:58,805 INFO L226 Difference]: Without dead ends: 1376 [2023-02-18 16:04:58,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 46 SyntacticMatches, 22 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=907, Invalid=2515, Unknown=0, NotChecked=0, Total=3422 [2023-02-18 16:04:58,806 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 509 mSDsluCounter, 1107 mSDsCounter, 0 mSdLazyCounter, 1505 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 1186 SdHoareTripleChecker+Invalid, 1730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 1505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-18 16:04:58,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [509 Valid, 1186 Invalid, 1730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 1505 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-18 16:04:58,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1376 states. [2023-02-18 16:04:59,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1376 to 1039. [2023-02-18 16:04:59,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1039 states, 1038 states have (on average 1.3073217726396917) internal successors, (1357), 1038 states have internal predecessors, (1357), 0 states have call successors, (0), 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 16:04:59,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 1357 transitions. [2023-02-18 16:04:59,734 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 1357 transitions. Word has length 43 [2023-02-18 16:04:59,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:04:59,734 INFO L495 AbstractCegarLoop]: Abstraction has 1039 states and 1357 transitions. [2023-02-18 16:04:59,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.8409090909090908) internal successors, (81), 44 states have internal predecessors, (81), 0 states have call successors, (0), 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 16:04:59,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 1357 transitions. [2023-02-18 16:04:59,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-18 16:04:59,735 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:04:59,735 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:04:59,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-02-18 16:04:59,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-02-18 16:04:59,936 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:04:59,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:04:59,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1519867188, now seen corresponding path program 12 times [2023-02-18 16:04:59,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:04:59,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690635589] [2023-02-18 16:04:59,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:04:59,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:04:59,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:05:00,194 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2023-02-18 16:05:00,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:05:00,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690635589] [2023-02-18 16:05:00,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690635589] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:05:00,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973770186] [2023-02-18 16:05:00,194 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 16:05:00,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:05:00,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:05:00,195 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:05:00,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-02-18 16:05:00,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-18 16:05:00,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 16:05:00,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 68 conjunts are in the unsatisfiable core [2023-02-18 16:05:00,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:05:00,670 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2023-02-18 16:05:00,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:05:01,267 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2023-02-18 16:05:01,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973770186] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:05:01,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:05:01,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 24] total 58 [2023-02-18 16:05:01,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704628567] [2023-02-18 16:05:01,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:05:01,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-02-18 16:05:01,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:05:01,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-02-18 16:05:01,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=2905, Unknown=0, NotChecked=0, Total=3306 [2023-02-18 16:05:01,269 INFO L87 Difference]: Start difference. First operand 1039 states and 1357 transitions. Second operand has 58 states, 58 states have (on average 1.2586206896551724) internal successors, (73), 58 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 16:06:36,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 16:06:36,349 INFO L93 Difference]: Finished difference Result 1771 states and 2353 transitions. [2023-02-18 16:06:36,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 365 states. [2023-02-18 16:06:36,349 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.2586206896551724) internal successors, (73), 58 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 45 [2023-02-18 16:06:36,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 16:06:36,351 INFO L225 Difference]: With dead ends: 1771 [2023-02-18 16:06:36,351 INFO L226 Difference]: Without dead ends: 1455 [2023-02-18 16:06:36,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 45 SyntacticMatches, 13 SemanticMatches, 374 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54686 ImplicationChecksByTransitivity, 66.6s TimeCoverageRelationStatistics Valid=5217, Invalid=135783, Unknown=0, NotChecked=0, Total=141000 [2023-02-18 16:06:36,356 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 722 mSDsluCounter, 824 mSDsCounter, 0 mSdLazyCounter, 4894 mSolverCounterSat, 1252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 722 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 6146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1252 IncrementalHoareTripleChecker+Valid, 4894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.2s IncrementalHoareTripleChecker+Time [2023-02-18 16:06:36,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [722 Valid, 858 Invalid, 6146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1252 Valid, 4894 Invalid, 0 Unknown, 0 Unchecked, 27.2s Time] [2023-02-18 16:06:36,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1455 states. [2023-02-18 16:06:37,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1455 to 1079. [2023-02-18 16:06:37,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1079 states, 1078 states have (on average 1.3033395176252318) internal successors, (1405), 1078 states have internal predecessors, (1405), 0 states have call successors, (0), 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 16:06:37,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 1405 transitions. [2023-02-18 16:06:37,331 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 1405 transitions. Word has length 45 [2023-02-18 16:06:37,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 16:06:37,331 INFO L495 AbstractCegarLoop]: Abstraction has 1079 states and 1405 transitions. [2023-02-18 16:06:37,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.2586206896551724) internal successors, (73), 58 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 16:06:37,331 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 1405 transitions. [2023-02-18 16:06:37,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-18 16:06:37,332 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 16:06:37,332 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 16:06:37,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-02-18 16:06:37,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-02-18 16:06:37,533 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 16:06:37,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 16:06:37,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1654492744, now seen corresponding path program 13 times [2023-02-18 16:06:37,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 16:06:37,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793274164] [2023-02-18 16:06:37,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 16:06:37,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 16:06:37,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:06:37,852 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 16:06:37,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 16:06:37,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793274164] [2023-02-18 16:06:37,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793274164] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 16:06:37,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866041736] [2023-02-18 16:06:37,852 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 16:06:37,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 16:06:37,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 16:06:37,855 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 16:06:37,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-02-18 16:06:37,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 16:06:37,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-18 16:06:37,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 16:06:38,187 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 11 proven. 121 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2023-02-18 16:06:38,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 16:06:38,191 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 11 proven. 121 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2023-02-18 16:06:38,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866041736] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 16:06:38,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 16:06:38,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 14, 14] total 39 [2023-02-18 16:06:38,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084524910] [2023-02-18 16:06:38,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 16:06:38,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-02-18 16:06:38,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 16:06:38,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-02-18 16:06:38,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1405, Unknown=0, NotChecked=0, Total=1482 [2023-02-18 16:06:38,193 INFO L87 Difference]: Start difference. First operand 1079 states and 1405 transitions. Second operand has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)